summaryrefslogtreecommitdiff
path: root/drivers/png
diff options
context:
space:
mode:
authorRémi Verschelde <rverschelde@gmail.com>2015-12-13 10:50:58 +0100
committerRémi Verschelde <rverschelde@gmail.com>2015-12-19 20:41:22 +0100
commit6750c8a729a289856a89b88ce1bed9d0761b913f (patch)
tree122db5252684833fe177bb59b943c157c375c215 /drivers/png
parentb989d4f887b6c823850e92ab7c5d47311de59b9d (diff)
Update to libpng 1.5.26
Includes numerous security fixes compared to the previous version which was around 1.5.7 or so. Fixes #2787
Diffstat (limited to 'drivers/png')
-rw-r--r--drivers/png/example.c85
-rw-r--r--drivers/png/filter_neon.S12
-rw-r--r--drivers/png/png.c398
-rw-r--r--drivers/png/png.h490
-rw-r--r--drivers/png/pngconf.h72
-rw-r--r--drivers/png/pngdebug.h22
-rw-r--r--drivers/png/pngerror.c80
-rw-r--r--drivers/png/pngget.c64
-rw-r--r--drivers/png/pnginfo.h7
-rw-r--r--drivers/png/pnglibconf.h164
-rw-r--r--drivers/png/pngmem.c12
-rw-r--r--drivers/png/pngpread.c695
-rw-r--r--drivers/png/pngpriv.h236
-rw-r--r--drivers/png/pngread.c50
-rw-r--r--drivers/png/pngrio.c4
-rw-r--r--drivers/png/pngrtran.c228
-rw-r--r--drivers/png/pngrutil.c245
-rw-r--r--drivers/png/pngset.c283
-rw-r--r--drivers/png/pngstruct.h39
-rw-r--r--drivers/png/pngtrans.c115
-rw-r--r--drivers/png/pngwio.c6
-rw-r--r--drivers/png/pngwrite.c427
-rw-r--r--drivers/png/pngwtran.c20
-rw-r--r--drivers/png/pngwutil.c620
24 files changed, 1778 insertions, 2596 deletions
diff --git a/drivers/png/example.c b/drivers/png/example.c
index ec53a8cdee..7171d9847e 100644
--- a/drivers/png/example.c
+++ b/drivers/png/example.c
@@ -2,8 +2,8 @@
#if 0 /* in case someone actually tries to compile this */
/* example.c - an example of using libpng
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Maintained 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.19 [August 21, 2014]
+ * Maintained 1998-2014 Glenn Randers-Pehrson
* Maintained 1996, 1997 Andreas Dilger
* Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
*/
@@ -89,7 +89,7 @@ void read_png(char *file_name) /* We need to open the file */
{
png_structp png_ptr;
png_infop info_ptr;
- unsigned int sig_read = 0;
+ int sig_read = 0;
png_uint_32 width, height;
int bit_depth, color_type, interlace_type;
FILE *fp;
@@ -98,7 +98,7 @@ void read_png(char *file_name) /* We need to open the file */
return (ERROR);
#else no_open_file /* prototype 2 */
-void read_png(FILE *fp, unsigned int sig_read) /* File is already open */
+void read_png(FILE *fp, int sig_read) /* File is already open */
{
png_structp png_ptr;
png_infop info_ptr;
@@ -188,7 +188,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */
* are mutually exclusive.
*/
- /* Tell libpng to strip 16 bit/color files down to 8 bits/color.
+ /* Tell libpng to strip 16 bits/color files down to 8 bits/color.
* Use accurate scaling if it's available, otherwise just chop off the
* low byte.
*/
@@ -259,9 +259,9 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */
/* If we don't have another value */
else
{
- screen_gamma = 2.2; /* A good guess for a PC monitor in a dimly
- lit room */
- screen_gamma = 1.7 or 1.0; /* A good guess for Mac systems */
+ screen_gamma = PNG_DEFAULT_sRGB; /* A good guess for a PC monitor
+ in a dimly lit room */
+ screen_gamma = PNG_GAMMA_MAC_18 or 1.0; /* Good guesses for Mac systems */
}
/* Tell libpng to handle the gamma conversion for you. The final call
@@ -273,7 +273,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */
int intent;
if (png_get_sRGB(png_ptr, info_ptr, &intent))
- png_set_gamma(png_ptr, screen_gamma, 0.45455);
+ png_set_gamma(png_ptr, screen_gamma, PNG_DEFAULT_sRGB);
else
{
double image_gamma;
@@ -284,7 +284,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */
}
#ifdef PNG_READ_QUANTIZE_SUPPORTED
- /* Quantize RGB files down to 8 bit palette or reduce palettes
+ /* Quantize RGB files down to 8-bit palette or reduce palettes
* to the number of colors available on your screen.
*/
if (color_type & PNG_COLOR_MASK_COLOR)
@@ -336,7 +336,7 @@ void read_png(FILE *fp, unsigned int sig_read) /* File is already open */
/* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR) */
png_set_swap_alpha(png_ptr);
- /* Swap bytes of 16 bit files to least significant byte first */
+ /* Swap bytes of 16-bit files to least significant byte first */
png_set_swap(png_ptr);
/* Add filler (or alpha) byte (before/after each RGB triplet) */
@@ -695,25 +695,38 @@ void write_png(char *file_name /* , ... other image information ... */)
png_set_gAMA(png_ptr, info_ptr, gamma);
/* Optionally write comments into the image */
- text_ptr[0].key = "Title";
- text_ptr[0].text = "Mona Lisa";
- text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE;
- text_ptr[0].itxt_length = 0;
- text_ptr[0].lang = NULL;
- text_ptr[0].lang_key = NULL;
- text_ptr[1].key = "Author";
- text_ptr[1].text = "Leonardo DaVinci";
- text_ptr[1].compression = PNG_TEXT_COMPRESSION_NONE;
- text_ptr[1].itxt_length = 0;
- text_ptr[1].lang = NULL;
- text_ptr[1].lang_key = NULL;
- text_ptr[2].key = "Description";
- text_ptr[2].text = "<long text>";
- text_ptr[2].compression = PNG_TEXT_COMPRESSION_zTXt;
- text_ptr[2].itxt_length = 0;
- text_ptr[2].lang = NULL;
- text_ptr[2].lang_key = NULL;
- png_set_text(png_ptr, info_ptr, text_ptr, 3);
+ {
+ png_text text_ptr[3];
+
+ char key0[]="Title";
+ char text0[]="Mona Lisa";
+ text_ptr[0].key = key0;
+ text_ptr[0].text = text0;
+ text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE;
+ text_ptr[0].itxt_length = 0;
+ text_ptr[0].lang = NULL;
+ text_ptr[0].lang_key = NULL;
+
+ char key1[]="Author";
+ char text1[]="Leonardo DaVinci";
+ text_ptr[1].key = key1;
+ text_ptr[1].text = text1;
+ text_ptr[1].compression = PNG_TEXT_COMPRESSION_NONE;
+ text_ptr[1].itxt_length = 0;
+ text_ptr[1].lang = NULL;
+ text_ptr[1].lang_key = NULL;
+
+ char key2[]="Description";
+ char text2[]="<long text>";
+ text_ptr[2].key = key2;
+ text_ptr[2].text = text2;
+ text_ptr[2].compression = PNG_TEXT_COMPRESSION_zTXt;
+ text_ptr[2].itxt_length = 0;
+ text_ptr[2].lang = NULL;
+ text_ptr[2].lang_key = NULL;
+
+ png_set_text(write_ptr, write_info_ptr, text_ptr, 3);
+ }
/* Other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs */
@@ -737,7 +750,7 @@ void write_png(char *file_name /* , ... other image information ... */)
*/
/* Once we write out the header, the compression type on the text
- * chunks gets changed to PNG_TEXT_COMPRESSION_NONE_WR or
+ * chunk gets changed to PNG_TEXT_COMPRESSION_NONE_WR or
* PNG_TEXT_COMPRESSION_zTXt_WR, so it doesn't get written out again
* at the end.
*/
@@ -771,11 +784,11 @@ void write_png(char *file_name /* , ... other image information ... */)
/* Swap bytes of 16-bit files to most significant byte first */
png_set_swap(png_ptr);
- /* Swap bits of 1, 2, 4 bit packed pixel formats */
+ /* Swap bits of 1-bit, 2-bit, 4-bit packed pixel formats */
png_set_packswap(png_ptr);
/* Turn on interlace handling if you are not using png_write_image() */
- if (interlacing)
+ if (interlacing != 0)
number_passes = png_set_interlace_handling(png_ptr);
else
@@ -786,12 +799,16 @@ void write_png(char *file_name /* , ... other image information ... */)
* use the first method if you aren't handling interlacing yourself.
*/
png_uint_32 k, height, width;
- png_byte image[height][width*bytes_per_pixel];
+
+ /* In this example, "image" is a one-dimensional array of bytes */
+ png_byte image[height*width*bytes_per_pixel];
+
png_bytep row_pointers[height];
if (height > PNG_UINT_32_MAX/png_sizeof(png_bytep))
png_error (png_ptr, "Image is too tall to process in memory");
+ /* Set up pointers into your "image" byte array */
for (k = 0; k < height; k++)
row_pointers[k] = image + k*width*bytes_per_pixel;
diff --git a/drivers/png/filter_neon.S b/drivers/png/filter_neon.S
index 63a5d8c17f..477df7c99b 100644
--- a/drivers/png/filter_neon.S
+++ b/drivers/png/filter_neon.S
@@ -1,18 +1,27 @@
/* filter_neon.S - NEON optimised filter functions
*
- * Copyright (c) 2011 Glenn Randers-Pehrson
+ * Copyright (c) 2013 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011.
+ * Last changed in libpng 1.5.17 [June 27, 2013]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*/
+/* This is required to get the symbol renames, which are #defines, and also
+ * includes the definition (or not) of PNG_ARM_NEON_OPT.
+ */
+#define PNG_VERSION_INFO_ONLY
+#include "../pngpriv.h"
+
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
#endif
+#if PNG_ARM_NEON_OPT > 0
+
#ifdef __ELF__
# define ELF
#else
@@ -223,3 +232,4 @@ func png_read_filter_row_paeth3_neon, export=1
pop {r4,pc}
endfunc
+#endif /* PNG_ARM_NEON_OPT > 0 */
diff --git a/drivers/png/png.c b/drivers/png/png.c
index 08074485b8..cd7da59222 100644
--- a/drivers/png/png.c
+++ b/drivers/png/png.c
@@ -1,8 +1,8 @@
/* png.c - location for general purpose libpng functions
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.23 [July 23, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -14,7 +14,7 @@
#include "pngpriv.h"
/* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_5_7 Your_png_h_is_not_version_1_5_7;
+typedef png_libpng_version_1_5_26 Your_png_h_is_not_version_1_5_26;
/* Tells libpng that we have already handled the first "num_bytes" bytes
* of the PNG file signature. If the PNG data is embedded into another
@@ -26,15 +26,20 @@ typedef png_libpng_version_1_5_7 Your_png_h_is_not_version_1_5_7;
void PNGAPI
png_set_sig_bytes(png_structp png_ptr, int num_bytes)
{
+ unsigned int nb = (unsigned int)num_bytes;
+
png_debug(1, "in png_set_sig_bytes");
if (png_ptr == NULL)
return;
- if (num_bytes > 8)
+ if (num_bytes < 0)
+ nb = 0;
+
+ if (nb > 8)
png_error(png_ptr, "Too many bytes for PNG signature");
- png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes);
+ png_ptr->sig_bytes = (png_byte)nb;
}
/* Checks whether the supplied bytes match the PNG signature. We allow
@@ -73,13 +78,16 @@ PNG_FUNCTION(voidpf /* PRIVATE */,
png_zalloc,(voidpf png_ptr, uInt items, uInt size),PNG_ALLOCATED)
{
png_voidp ptr;
- png_structp p=(png_structp)png_ptr;
- png_uint_32 save_flags=p->flags;
+ png_structp p;
+ png_uint_32 save_flags;
png_alloc_size_t num_bytes;
if (png_ptr == NULL)
return (NULL);
+ p=(png_structp)png_ptr;
+ save_flags=p->flags;
+
if (items > PNG_UINT_32_MAX/size)
{
png_warning (p, "Potential overflow in png_zalloc()");
@@ -146,9 +154,10 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
do
{
uInt safeLength = (uInt)length;
+#ifndef __COVERITY__
if (safeLength == 0)
safeLength = (uInt)-1; /* evil, but safe */
-
+#endif
crc = crc32(crc, ptr, safeLength);
/* The following should never issue compiler warnings, if they do the
@@ -171,49 +180,51 @@ png_calculate_crc(png_structp png_ptr, png_const_bytep ptr, png_size_t length)
int
png_user_version_check(png_structp png_ptr, png_const_charp user_png_ver)
{
- if (user_png_ver)
+ /* Libpng versions 1.0.0 and later are binary compatible if the version
+ * string matches through the second '.'; we must recompile any
+ * applications that use any older library version.
+ */
+
+ if (user_png_ver != NULL)
{
- int i = 0;
+ int i = -1;
+ int found_dots = 0;
do
{
- if (user_png_ver[i] != png_libpng_ver[i])
+ i++;
+ if (user_png_ver[i] != PNG_LIBPNG_VER_STRING[i])
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
- } while (png_libpng_ver[i++]);
+ if (user_png_ver[i] == '.')
+ found_dots++;
+ } while (found_dots < 2 && user_png_ver[i] != 0 &&
+ PNG_LIBPNG_VER_STRING[i] != 0);
}
else
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
- if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
+ if ((png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) != 0)
{
- /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
- * we must recompile any applications that use any older library version.
- * For versions after libpng 1.0, we will be compatible, so we need
- * only check the first digit.
- */
- if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
- (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
- (user_png_ver[0] == '0' && user_png_ver[2] < '9'))
- {
#ifdef PNG_WARNINGS_SUPPORTED
- size_t pos = 0;
- char m[128];
+ size_t pos = 0;
+ char m[128];
- pos = png_safecat(m, sizeof m, pos, "Application built with libpng-");
- pos = png_safecat(m, sizeof m, pos, user_png_ver);
- pos = png_safecat(m, sizeof m, pos, " but running with ");
- pos = png_safecat(m, sizeof m, pos, png_libpng_ver);
+ pos = png_safecat(m, (sizeof m), pos,
+ "Application built with libpng-");
+ pos = png_safecat(m, (sizeof m), pos, user_png_ver);
+ pos = png_safecat(m, (sizeof m), pos, " but running with ");
+ pos = png_safecat(m, (sizeof m), pos, PNG_LIBPNG_VER_STRING);
+ PNG_UNUSED(pos)
- png_warning(png_ptr, m);
+ png_warning(png_ptr, m);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
- png_ptr->flags = 0;
+ png_ptr->flags = 0;
#endif
- return 0;
- }
+ return 0;
}
/* Success return. */
@@ -300,6 +311,8 @@ png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size)
png_destroy_struct(info_ptr);
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
*ptr_ptr = info_ptr;
+ if (info_ptr == NULL)
+ return;
}
/* Set everything to 0 */
@@ -337,42 +350,43 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_TEXT_SUPPORTED
/* Free text item num or (if num == -1) all text items */
- if ((mask & PNG_FREE_TEXT) & info_ptr->free_me)
+ if (info_ptr->text != 0 &&
+ ((mask & PNG_FREE_TEXT) & info_ptr->free_me) != 0)
{
if (num != -1)
{
- if (info_ptr->text && info_ptr->text[num].key)
- {
- png_free(png_ptr, info_ptr->text[num].key);
- info_ptr->text[num].key = NULL;
- }
+ png_free(png_ptr, info_ptr->text[num].key);
+ info_ptr->text[num].key = NULL;
}
else
{
int i;
+
for (i = 0; i < info_ptr->num_text; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i);
+ png_free(png_ptr, info_ptr->text[i].key);
+
png_free(png_ptr, info_ptr->text);
info_ptr->text = NULL;
- info_ptr->num_text=0;
+ info_ptr->num_text = 0;
}
}
#endif
#ifdef PNG_tRNS_SUPPORTED
/* Free any tRNS entry */
- if ((mask & PNG_FREE_TRNS) & info_ptr->free_me)
+ if (((mask & PNG_FREE_TRNS) & info_ptr->free_me) != 0)
{
+ info_ptr->valid &= ~PNG_INFO_tRNS;
png_free(png_ptr, info_ptr->trans_alpha);
info_ptr->trans_alpha = NULL;
- info_ptr->valid &= ~PNG_INFO_tRNS;
+ info_ptr->num_trans = 0;
}
#endif
#ifdef PNG_sCAL_SUPPORTED
/* Free any sCAL entry */
- if ((mask & PNG_FREE_SCAL) & info_ptr->free_me)
+ if (((mask & PNG_FREE_SCAL) & info_ptr->free_me) != 0)
{
png_free(png_ptr, info_ptr->scal_s_width);
png_free(png_ptr, info_ptr->scal_s_height);
@@ -384,20 +398,20 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_pCAL_SUPPORTED
/* Free any pCAL entry */
- if ((mask & PNG_FREE_PCAL) & info_ptr->free_me)
+ if (((mask & PNG_FREE_PCAL) & info_ptr->free_me) != 0)
{
png_free(png_ptr, info_ptr->pcal_purpose);
png_free(png_ptr, info_ptr->pcal_units);
info_ptr->pcal_purpose = NULL;
info_ptr->pcal_units = NULL;
+
if (info_ptr->pcal_params != NULL)
{
int i;
- for (i = 0; i < (int)info_ptr->pcal_nparams; i++)
- {
+
+ for (i = 0; i < info_ptr->pcal_nparams; i++)
png_free(png_ptr, info_ptr->pcal_params[i]);
- info_ptr->pcal_params[i] = NULL;
- }
+
png_free(png_ptr, info_ptr->pcal_params);
info_ptr->pcal_params = NULL;
}
@@ -406,8 +420,8 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#endif
#ifdef PNG_iCCP_SUPPORTED
- /* Free any iCCP entry */
- if ((mask & PNG_FREE_ICCP) & info_ptr->free_me)
+ /* Free any profile entry */
+ if (((mask & PNG_FREE_ICCP) & info_ptr->free_me) != 0)
{
png_free(png_ptr, info_ptr->iccp_name);
png_free(png_ptr, info_ptr->iccp_profile);
@@ -419,74 +433,62 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_sPLT_SUPPORTED
/* Free a given sPLT entry, or (if num == -1) all sPLT entries */
- if ((mask & PNG_FREE_SPLT) & info_ptr->free_me)
+ if (info_ptr->splt_palettes != 0 &&
+ ((mask & PNG_FREE_SPLT) & info_ptr->free_me) != 0)
{
if (num != -1)
{
- if (info_ptr->splt_palettes)
- {
- png_free(png_ptr, info_ptr->splt_palettes[num].name);
- png_free(png_ptr, info_ptr->splt_palettes[num].entries);
- info_ptr->splt_palettes[num].name = NULL;
- info_ptr->splt_palettes[num].entries = NULL;
- }
+ png_free(png_ptr, info_ptr->splt_palettes[num].name);
+ png_free(png_ptr, info_ptr->splt_palettes[num].entries);
+ info_ptr->splt_palettes[num].name = NULL;
+ info_ptr->splt_palettes[num].entries = NULL;
}
else
{
- if (info_ptr->splt_palettes_num)
- {
- int i;
- for (i = 0; i < (int)info_ptr->splt_palettes_num; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i);
+ int i;
- png_free(png_ptr, info_ptr->splt_palettes);
- info_ptr->splt_palettes = NULL;
- info_ptr->splt_palettes_num = 0;
+ for (i = 0; i < info_ptr->splt_palettes_num; i++)
+ {
+ png_free(png_ptr, info_ptr->splt_palettes[i].name);
+ png_free(png_ptr, info_ptr->splt_palettes[i].entries);
}
+
+ png_free(png_ptr, info_ptr->splt_palettes);
+ info_ptr->splt_palettes = NULL;
+ info_ptr->splt_palettes_num = 0;
info_ptr->valid &= ~PNG_INFO_sPLT;
}
}
#endif
#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
- if (png_ptr->unknown_chunk.data)
- {
- png_free(png_ptr, png_ptr->unknown_chunk.data);
- png_ptr->unknown_chunk.data = NULL;
- }
-
- if ((mask & PNG_FREE_UNKN) & info_ptr->free_me)
+ if (info_ptr->unknown_chunks != 0 &&
+ ((mask & PNG_FREE_UNKN) & info_ptr->free_me) != 0)
{
if (num != -1)
{
- if (info_ptr->unknown_chunks)
- {
- png_free(png_ptr, info_ptr->unknown_chunks[num].data);
- info_ptr->unknown_chunks[num].data = NULL;
- }
+ png_free(png_ptr, info_ptr->unknown_chunks[num].data);
+ info_ptr->unknown_chunks[num].data = NULL;
}
else
{
int i;
- if (info_ptr->unknown_chunks_num)
- {
- for (i = 0; i < info_ptr->unknown_chunks_num; i++)
- png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i);
+ for (i = 0; i < info_ptr->unknown_chunks_num; i++)
+ png_free(png_ptr, info_ptr->unknown_chunks[i].data);
- png_free(png_ptr, info_ptr->unknown_chunks);
- info_ptr->unknown_chunks = NULL;
- info_ptr->unknown_chunks_num = 0;
- }
+ png_free(png_ptr, info_ptr->unknown_chunks);
+ info_ptr->unknown_chunks = NULL;
+ info_ptr->unknown_chunks_num = 0;
}
}
#endif
#ifdef PNG_hIST_SUPPORTED
/* Free any hIST entry */
- if ((mask & PNG_FREE_HIST) & info_ptr->free_me)
+ if (((mask & PNG_FREE_HIST) & info_ptr->free_me) != 0)
{
png_free(png_ptr, info_ptr->hist);
info_ptr->hist = NULL;
@@ -495,9 +497,9 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#endif
/* Free any PLTE entry that was internally allocated */
- if ((mask & PNG_FREE_PLTE) & info_ptr->free_me)
+ if (((mask & PNG_FREE_PLTE) & info_ptr->free_me) != 0)
{
- png_zfree(png_ptr, info_ptr->palette);
+ png_free(png_ptr, info_ptr->palette);
info_ptr->palette = NULL;
info_ptr->valid &= ~PNG_INFO_PLTE;
info_ptr->num_palette = 0;
@@ -505,16 +507,14 @@ png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask,
#ifdef PNG_INFO_IMAGE_SUPPORTED
/* Free any image bits attached to the info structure */
- if ((mask & PNG_FREE_ROWS) & info_ptr->free_me)
+ if (((mask & PNG_FREE_ROWS) & info_ptr->free_me) != 0)
{
- if (info_ptr->row_pointers)
+ if (info_ptr->row_pointers != 0)
{
- int row;
- for (row = 0; row < (int)info_ptr->height; row++)
- {
+ png_uint_32 row;
+ for (row = 0; row < info_ptr->height; row++)
png_free(png_ptr, info_ptr->row_pointers[row]);
- info_ptr->row_pointers[row] = NULL;
- }
+
png_free(png_ptr, info_ptr->row_pointers);
info_ptr->row_pointers = NULL;
}
@@ -655,14 +655,15 @@ png_get_copyright(png_const_structp png_ptr)
#else
# ifdef __STDC__
return PNG_STRING_NEWLINE \
- "libpng version 1.5.7 - December 15, 2011" PNG_STRING_NEWLINE \
- "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
+ "libpng version 1.5.26 - December 17, 2015" PNG_STRING_NEWLINE \
+ "Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson" \
+ PNG_STRING_NEWLINE \
"Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
"Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
PNG_STRING_NEWLINE;
# else
- return "libpng version 1.5.7 - December 15, 2011\
- Copyright (c) 1998-2011 Glenn Randers-Pehrson\
+ return "libpng version 1.5.26 - December 17, 2015\
+ Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson\
Copyright (c) 1996-1997 Andreas Dilger\
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
# endif
@@ -892,7 +893,8 @@ int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy)
/* Check xy and, implicitly, z. Note that wide gamut color spaces typically
* have end points with 0 tristimulus values (these are impossible end
- * points, but they are used to cover the possible colors.)
+ * points, but they are used to cover the possible colors). We check
+ * xy.whitey against 5, not 0, to avoid a possible integer overflow.
*/
if (xy.redx < 0 || xy.redx > PNG_FP_1) return 1;
if (xy.redy < 0 || xy.redy > PNG_FP_1-xy.redx) return 1;
@@ -901,7 +903,7 @@ int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy)
if (xy.bluex < 0 || xy.bluex > PNG_FP_1) return 1;
if (xy.bluey < 0 || xy.bluey > PNG_FP_1-xy.bluex) return 1;
if (xy.whitex < 0 || xy.whitex > PNG_FP_1) return 1;
- if (xy.whitey < 0 || xy.whitey > PNG_FP_1-xy.whitex) return 1;
+ if (xy.whitey < 5 || xy.whitey > PNG_FP_1-xy.whitex) return 1;
/* The reverse calculation is more difficult because the original tristimulus
* value had 9 independent values (red,green,blue)x(X,Y,Z) however only 8
@@ -969,8 +971,8 @@ int png_XYZ_from_xy(png_XYZ *XYZ, png_xy xy)
* and it is certain that it becomes unstable where the end points are close
* together.
*
- * So this code uses the perhaps slighly less optimal but more understandable
- * and totally obvious approach of calculating color-scale.
+ * So this code uses the perhaps slightly less optimal but more
+ * understandable and totally obvious approach of calculating color-scale.
*
* This algorithm depends on the precision in white-scale and that is
* (1/white-y), so we can immediately see that as white-y approaches 0 the
@@ -1165,6 +1167,17 @@ int png_XYZ_from_xy_checked(png_structp png_ptr, png_XYZ *XYZ, png_xy xy)
}
#endif
+#ifdef __GNUC__
+/* This exists solely to work round a warning from GNU C. */
+static int /* PRIVATE */
+png_gt(size_t a, size_t b)
+{
+ return a > b;
+}
+#else
+# define png_gt(a,b) ((a) > (b))
+#endif
+
void /* PRIVATE */
png_check_IHDR(png_structp png_ptr,
png_uint_32 width, png_uint_32 height, int bit_depth,
@@ -1179,53 +1192,68 @@ png_check_IHDR(png_structp png_ptr,
png_warning(png_ptr, "Image width is zero in IHDR");
error = 1;
}
-
- if (height == 0)
+ else if (width > PNG_UINT_31_MAX)
{
- png_warning(png_ptr, "Image height is zero in IHDR");
+ png_warning(png_ptr, "Invalid image width in IHDR");
error = 1;
}
-# ifdef PNG_SET_USER_LIMITS_SUPPORTED
- if (width > png_ptr->user_width_max)
-
-# else
- if (width > PNG_USER_WIDTH_MAX)
-# endif
+ else if (png_gt(width,
+ (PNG_SIZE_MAX >> 3) /* 8-byte RGBA pixels */
+ - 48 /* big_row_buf hack */
+ - 1 /* filter byte */
+ - 7*8 /* rounding width to multiple of 8 pix */
+ - 8)) /* extra max_pixel_depth pad */
{
- png_warning(png_ptr, "Image width exceeds user limit in IHDR");
+ /* The size of the row must be within the limits of this architecture.
+ * Because the read code can perform arbitrary transformations the
+ * maximum size is checked here. Because the code in png_read_start_row
+ * adds extra space "for safety's sake" in several places a conservative
+ * limit is used here.
+ *
+ * NOTE: it would be far better to check the size that is actually used,
+ * but the effect in the real world is minor and the changes are more
+ * extensive, therefore much more dangerous and much more difficult to
+ * write in a way that avoids compiler warnings.
+ */
+ png_warning(png_ptr, "Image width is too large for this architecture");
error = 1;
}
-
-# ifdef PNG_SET_USER_LIMITS_SUPPORTED
- if (height > png_ptr->user_height_max)
-# else
- if (height > PNG_USER_HEIGHT_MAX)
-# endif
+ else
{
- png_warning(png_ptr, "Image height exceeds user limit in IHDR");
- error = 1;
+# ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (width > png_ptr->user_width_max)
+# else
+ if (width > PNG_USER_WIDTH_MAX)
+# endif
+ {
+ png_warning(png_ptr, "Image width exceeds user limit in IHDR");
+ error = 1;
+ }
}
- if (width > PNG_UINT_31_MAX)
+ if (height == 0)
{
- png_warning(png_ptr, "Invalid image width in IHDR");
+ png_warning(png_ptr, "Image height is zero in IHDR");
error = 1;
}
-
- if (height > PNG_UINT_31_MAX)
+ else if (height > PNG_UINT_31_MAX)
{
png_warning(png_ptr, "Invalid image height in IHDR");
error = 1;
}
-
- if (width > (PNG_UINT_32_MAX
- >> 3) /* 8-byte RGBA pixels */
- - 48 /* bigrowbuf hack */
- - 1 /* filter byte */
- - 7*8 /* rounding of width to multiple of 8 pixels */
- - 8) /* extra max_pixel_depth pad */
- png_warning(png_ptr, "Width is too large for libpng to process pixels");
+ else
+ {
+# ifdef PNG_SET_USER_LIMITS_SUPPORTED
+ if (height > png_ptr->user_height_max)
+# else
+ if (height > PNG_USER_HEIGHT_MAX)
+# endif
+ {
+ png_warning(png_ptr, "Image height exceeds user limit in IHDR");
+ error = 1;
+ }
+ }
/* Check other values */
if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
@@ -1458,7 +1486,7 @@ png_check_fp_string(png_const_charp string, png_size_t size)
}
#endif /* pCAL or sCAL */
-#ifdef PNG_READ_sCAL_SUPPORTED
+#ifdef PNG_sCAL_SUPPORTED
# ifdef PNG_FLOATING_POINT_SUPPORTED
/* Utility used below - a simple accurate power of ten from an integral
* exponent.
@@ -1467,7 +1495,7 @@ static double
png_pow10(int power)
{
int recip = 0;
- double d = 1;
+ double d = 1.0;
/* Handle negative exponent with a reciprocal at the end because
* 10 is exact whereas .1 is inexact in base 2
@@ -1481,7 +1509,7 @@ png_pow10(int power)
if (power > 0)
{
/* Decompose power bitwise. */
- double mult = 10;
+ double mult = 10.0;
do
{
if (power & 1) d *= mult;
@@ -1490,7 +1518,7 @@ png_pow10(int power)
}
while (power > 0);
- if (recip) d = 1/d;
+ if (recip != 0) d = 1/d;
}
/* else power is 0 and d is 1 */
@@ -1600,7 +1628,8 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
{
double d;
- fp *= 10;
+ fp *= 10.0;
+
/* Use modf here, not floor and subtract, so that
* the separation is done in one step. At the end
* of the loop don't break the number into parts so
@@ -1613,7 +1642,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
{
d = floor(fp + .5);
- if (d > 9)
+ if (d > 9.0)
{
/* Rounding up to 10, handle that here. */
if (czero > 0)
@@ -1621,9 +1650,10 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
--czero, d = 1;
if (cdigits == 0) --clead;
}
+
else
{
- while (cdigits > 0 && d > 9)
+ while (cdigits > 0 && d > 9.0)
{
int ch = *--ascii;
@@ -1648,7 +1678,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
* exponent but take into account the leading
* decimal point.
*/
- if (d > 9) /* cdigits == 0 */
+ if (d > 9.0) /* cdigits == 0 */
{
if (exp_b10 == (-1))
{
@@ -1669,18 +1699,19 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
++exp_b10;
/* In all cases we output a '1' */
- d = 1;
+ d = 1.0;
}
}
}
fp = 0; /* Guarantees termination below. */
}
- if (d == 0)
+ if (d == 0.0)
{
++czero;
if (cdigits == 0) ++clead;
}
+
else
{
/* Included embedded zeros in the digit count. */
@@ -1708,6 +1739,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
above */
--exp_b10;
}
+
*ascii++ = (char)(48 + (int)d), ++cdigits;
}
}
@@ -1718,7 +1750,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
/* Check for an exponent, if we don't need one we are
* done and just need to terminate the string. At
* this point exp_b10==(-1) is effectively if flag - it got
- * to '-1' because of the decrement after outputing
+ * to '-1' because of the decrement after outputting
* the decimal point above (the exponent required is
* *not* -1!)
*/
@@ -1726,7 +1758,7 @@ png_ascii_from_fp(png_structp png_ptr, png_charp ascii, png_size_t size,
{
/* The following only happens if we didn't output the
* leading zeros above for negative exponent, so this
- * doest add to the digit requirement. Note that the
+ * doesn't add to the digit requirement. Note that the
* two zeros here can only be output if the two leading
* zeros were *not* output, so this doesn't increase
* the output count.
@@ -1900,7 +1932,7 @@ png_fixed(png_structp png_ptr, double fp, png_const_charp text)
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || \
- defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED)
+ defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
/* muldiv functions */
/* This API takes signed arguments and rounds the result to the nearest
* integer (or, for a fixed point number - the standard argument - to
@@ -2004,7 +2036,7 @@ png_muldiv(png_fixed_point_p res, png_fixed_point a, png_int_32 times,
if (s00 >= (D >> 1))
++result;
- if (negative)
+ if (negative != 0)
result = -result;
/* Check for overflow. */
@@ -2040,26 +2072,31 @@ png_muldiv_warn(png_structp png_ptr, png_fixed_point a, png_int_32 times,
}
#endif
-#ifdef PNG_READ_GAMMA_SUPPORTED /* more fixed point functions for gammma */
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED)
+/* more fixed point functions for gamma and cHRM (xy/XYZ) suport. */
/* Calculate a reciprocal, return 0 on div-by-zero or overflow. */
png_fixed_point
png_reciprocal(png_fixed_point a)
{
+ if (a != 0)
+ {
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = floor(1E10/a+.5);
+ double r = floor(1E10/a+.5);
- if (r <= 2147483647. && r >= -2147483648.)
- return (png_fixed_point)r;
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
#else
- png_fixed_point res;
+ png_fixed_point res;
- if (png_muldiv(&res, 100000, 100000, a))
- return res;
+ if (png_muldiv(&res, 100000, 100000, a))
+ return res;
#endif
+ }
return 0; /* error/overflow */
}
+#ifdef PNG_READ_GAMMA_SUPPORTED
/* A local convenience routine. */
static png_fixed_point
png_product2(png_fixed_point a, png_fixed_point b)
@@ -2081,6 +2118,7 @@ png_product2(png_fixed_point a, png_fixed_point b)
return 0; /* overflow */
}
+#endif /* READ_GAMMA */
/* The inverse of the above. */
png_fixed_point
@@ -2088,17 +2126,20 @@ png_reciprocal2(png_fixed_point a, png_fixed_point b)
{
/* The required result is 1/a * 1/b; the following preserves accuracy. */
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
- double r = 1E15/a;
- r /= b;
- r = floor(r+.5);
+ if (a != 0 && b != 0)
+ {
+ double r = 1E15/a;
+ r /= b;
+ r = floor(r+.5);
- if (r <= 2147483647. && r >= -2147483648.)
- return (png_fixed_point)r;
+ if (r <= 2147483647. && r >= -2147483648.)
+ return (png_fixed_point)r;
+ }
#else
- /* This may overflow because the range of png_fixed_point isn't symmetric,
- * but this API is only used for the product of file and screen gamma so it
- * doesn't matter that the smallest number it can produce is 1/21474, not
- * 1/100000
+ /* This may overflow because the range of png_fixed_point isn't
+ * symmetric, but this API is only used for the product of file and
+ * screen gamma so it doesn't matter that the smallest number it can
+ * produce is 1/21474, not 1/100000
*/
png_fixed_point res = png_product2(a, b);
@@ -2108,7 +2149,7 @@ png_reciprocal2(png_fixed_point a, png_fixed_point b)
return 0; /* overflow */
}
-#endif /* READ_GAMMA */
+#endif /* READ_GAMMA || cHRM */
#ifdef PNG_CHECK_cHRM_SUPPORTED
/* Added at libpng version 1.2.34 (Dec 8, 2008) and 1.4.0 (Jan 2,
@@ -2519,6 +2560,7 @@ png_gamma_significant(png_fixed_point gamma_val)
gamma_val > PNG_FP_1 + PNG_GAMMA_THRESHOLD_FIXED;
}
+#ifdef PNG_16BIT_SUPPORTED
/* Internal function to build a single 16-bit table - the table consists of
* 'num' 256-entry subtables, where 'num' is determined by 'shift' - the amount
* to shift the input values right (or 16-number_of_signifiant_bits).
@@ -2567,7 +2609,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
double d = floor(65535*pow(ig/(double)max, gamma_val*.00001)+.5);
sub_table[j] = (png_uint_16)d;
# else
- if (shift)
+ if (shift != 0)
ig = (ig * 65535U + max_by_2)/max;
sub_table[j] = png_gamma_16bit_correct(ig, gamma_val);
@@ -2583,7 +2625,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
{
png_uint_32 ig = (j << (8-shift)) + i;
- if (shift)
+ if (shift != 0)
ig = (ig * 65535U + max_by_2)/max;
sub_table[j] = (png_uint_16)ig;
@@ -2591,6 +2633,7 @@ png_build_16bit_table(png_structp png_ptr, png_uint_16pp *ptable,
}
}
}
+#endif
/* NOTE: this function expects the *inverse* of the overall gamma transformation
* required.
@@ -2868,3 +2911,24 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth)
}
#endif /* READ_GAMMA */
#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */
+
+/* HARDWARE OPTION SUPPORT */
+#ifdef PNG_SET_OPTION_SUPPORTED
+int PNGAPI
+png_set_option(png_structp png_ptr, int option, int onoff)
+{
+ if (png_ptr != NULL && option >= 0 && option < PNG_OPTION_NEXT &&
+ (option & 1) == 0)
+ {
+ int mask = 3 << option;
+ int setting = (2 + (onoff != 0)) << option;
+ int current = png_ptr->options;
+
+ png_ptr->options = (png_byte)((current & ~mask) | setting);
+
+ return (current & mask) >> option;
+ }
+
+ return PNG_OPTION_INVALID;
+}
+#endif
diff --git a/drivers/png/png.h b/drivers/png/png.h
index e22ec5c5df..c4f2bab15e 100644
--- a/drivers/png/png.h
+++ b/drivers/png/png.h
@@ -1,8 +1,9 @@
/* png.h - header file for PNG reference library
*
- * libpng version 1.5.7 - December 15, 2011
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * libpng version 1.5.26, December 17, 2015
+ *
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -11,182 +12,9 @@
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
* libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.5.7 - December 15, 2011: Glenn
+ * libpng versions 0.97, January 1998, through 1.5.26, December 17, 2015:
+ * Glenn Randers-Pehrson.
* See also "Contributing Authors", below.
- *
- * Note about libpng version numbers:
- *
- * Due to various miscommunications, unforeseen code incompatibilities
- * and occasional factors outside the authors' control, version numbering
- * on the library has not always been consistent and straightforward.
- * The following table summarizes matters since version 0.89c, which was
- * the first widely used release:
- *
- * source png.h png.h shared-lib
- * version string int version
- * ------- ------ ----- ----------
- * 0.89c "1.0 beta 3" 0.89 89 1.0.89
- * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90]
- * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95]
- * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96]
- * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97]
- * 0.97c 0.97 97 2.0.97
- * 0.98 0.98 98 2.0.98
- * 0.99 0.99 98 2.0.99
- * 0.99a-m 0.99 99 2.0.99
- * 1.00 1.00 100 2.1.0 [100 should be 10000]
- * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000]
- * 1.0.1 png.h string is 10001 2.1.0
- * 1.0.1a-e identical to the 10002 from here on, the shared library
- * 1.0.2 source version) 10002 is 2.V where V is the source code
- * 1.0.2a-b 10003 version, except as noted.
- * 1.0.3 10003
- * 1.0.3a-d 10004
- * 1.0.4 10004
- * 1.0.4a-f 10005
- * 1.0.5 (+ 2 patches) 10005
- * 1.0.5a-d 10006
- * 1.0.5e-r 10100 (not source compatible)
- * 1.0.5s-v 10006 (not binary compatible)
- * 1.0.6 (+ 3 patches) 10006 (still binary incompatible)
- * 1.0.6d-f 10007 (still binary incompatible)
- * 1.0.6g 10007
- * 1.0.6h 10007 10.6h (testing xy.z so-numbering)
- * 1.0.6i 10007 10.6i
- * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0)
- * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible)
- * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible)
- * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
- * 1.0.7 1 10007 (still compatible)
- * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4
- * 1.0.8rc1 1 10008 2.1.0.8rc1
- * 1.0.8 1 10008 2.1.0.8
- * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6
- * 1.0.9rc1 1 10009 2.1.0.9rc1
- * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10
- * 1.0.9rc2 1 10009 2.1.0.9rc2
- * 1.0.9 1 10009 2.1.0.9
- * 1.0.10beta1 1 10010 2.1.0.10beta1
- * 1.0.10rc1 1 10010 2.1.0.10rc1
- * 1.0.10 1 10010 2.1.0.10
- * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3
- * 1.0.11rc1 1 10011 2.1.0.11rc1
- * 1.0.11 1 10011 2.1.0.11
- * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2
- * 1.0.12rc1 2 10012 2.1.0.12rc1
- * 1.0.12 2 10012 2.1.0.12
- * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned)
- * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2
- * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5
- * 1.2.0rc1 3 10200 3.1.2.0rc1
- * 1.2.0 3 10200 3.1.2.0
- * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4
- * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2
- * 1.2.1 3 10201 3.1.2.1
- * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6
- * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1
- * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1
- * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1
- * 1.0.13 10 10013 10.so.0.1.0.13
- * 1.2.2 12 10202 12.so.0.1.2.2
- * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6
- * 1.2.3 12 10203 12.so.0.1.2.3
- * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3
- * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1
- * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1
- * 1.0.14 10 10014 10.so.0.1.0.14
- * 1.2.4 13 10204 12.so.0.1.2.4
- * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2
- * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3
- * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3
- * 1.0.15 10 10015 10.so.0.1.0.15
- * 1.2.5 13 10205 12.so.0.1.2.5
- * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4
- * 1.0.16 10 10016 10.so.0.1.0.16
- * 1.2.6 13 10206 12.so.0.1.2.6
- * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2
- * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1
- * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1
- * 1.0.17 10 10017 12.so.0.1.0.17
- * 1.2.7 13 10207 12.so.0.1.2.7
- * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5
- * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5
- * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5
- * 1.0.18 10 10018 12.so.0.1.0.18
- * 1.2.8 13 10208 12.so.0.1.2.8
- * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3
- * 1.2.9beta4-11 13 10209 12.so.0.9[.0]
- * 1.2.9rc1 13 10209 12.so.0.9[.0]
- * 1.2.9 13 10209 12.so.0.9[.0]
- * 1.2.10beta1-7 13 10210 12.so.0.10[.0]
- * 1.2.10rc1-2 13 10210 12.so.0.10[.0]
- * 1.2.10 13 10210 12.so.0.10[.0]
- * 1.4.0beta1-5 14 10400 14.so.0.0[.0]
- * 1.2.11beta1-4 13 10211 12.so.0.11[.0]
- * 1.4.0beta7-8 14 10400 14.so.0.0[.0]
- * 1.2.11 13 10211 12.so.0.11[.0]
- * 1.2.12 13 10212 12.so.0.12[.0]
- * 1.4.0beta9-14 14 10400 14.so.0.0[.0]
- * 1.2.13 13 10213 12.so.0.13[.0]
- * 1.4.0beta15-36 14 10400 14.so.0.0[.0]
- * 1.4.0beta37-87 14 10400 14.so.14.0[.0]
- * 1.4.0rc01 14 10400 14.so.14.0[.0]
- * 1.4.0beta88-109 14 10400 14.so.14.0[.0]
- * 1.4.0rc02-08 14 10400 14.so.14.0[.0]
- * 1.4.0 14 10400 14.so.14.0[.0]
- * 1.4.1beta01-03 14 10401 14.so.14.1[.0]
- * 1.4.1rc01 14 10401 14.so.14.1[.0]
- * 1.4.1beta04-12 14 10401 14.so.14.1[.0]
- * 1.4.1 14 10401 14.so.14.1[.0]
- * 1.4.2 14 10402 14.so.14.2[.0]
- * 1.4.3 14 10403 14.so.14.3[.0]
- * 1.4.4 14 10404 14.so.14.4[.0]
- * 1.5.0beta01-58 15 10500 15.so.15.0[.0]
- * 1.5.0rc01-07 15 10500 15.so.15.0[.0]
- * 1.5.0 15 10500 15.so.15.0[.0]
- * 1.5.1beta01-11 15 10501 15.so.15.1[.0]
- * 1.5.1rc01-02 15 10501 15.so.15.1[.0]
- * 1.5.1 15 10501 15.so.15.1[.0]
- * 1.5.2beta01-03 15 10502 15.so.15.2[.0]
- * 1.5.2rc01-03 15 10502 15.so.15.2[.0]
- * 1.5.2 15 10502 15.so.15.2[.0]
- * 1.5.3beta01-10 15 10503 15.so.15.3[.0]
- * 1.5.3rc01-02 15 10503 15.so.15.3[.0]
- * 1.5.3beta11 15 10503 15.so.15.3[.0]
- * 1.5.3 [omitted]
- * 1.5.4beta01-08 15 10504 15.so.15.4[.0]
- * 1.5.4rc01 15 10504 15.so.15.4[.0]
- * 1.5.4 15 10504 15.so.15.4[.0]
- * 1.5.5beta01-08 15 10505 15.so.15.5[.0]
- * 1.5.5rc01 15 10505 15.so.15.5[.0]
- * 1.5.5 15 10505 15.so.15.5[.0]
- * 1.5.6beta01-07 15 10506 15.so.15.6[.0]
- * 1.5.6rc01-03 15 10506 15.so.15.6[.0]
- * 1.5.6 15 10506 15.so.15.6[.0]
- * 1.5.7beta01-05 15 10507 15.so.15.7[.0]
- * 1.5.7rc01-03 15 10507 15.so.15.7[.0]
- * 1.5.7 15 10507 15.so.15.7[.0]
- *
- * Henceforth the source version will match the shared-library major
- * and minor numbers; the shared-library major version number will be
- * used for changes in backward compatibility, as it is intended. The
- * PNG_LIBPNG_VER macro, which is not used within libpng but is available
- * for applications, is an unsigned integer of the form xyyzz corresponding
- * to the source version x.y.z (leading zeros in y and z). Beta versions
- * were given the previous public release number plus a letter, until
- * version 1.0.6j; from then on they were given the upcoming public
- * release number plus "betaNN" or "rcN".
- *
- * Binary incompatibility exists only when applications make direct access
- * to the info_ptr or png_ptr members through png.h, and the compiled
- * application is loaded with a different version of the library.
- *
- * DLLNUM will change each time there are forward or backward changes
- * in binary compatibility (e.g., when a new feature is added).
- *
- * See libpng-manual.txt or libpng.3 for more information. The PNG
- * specification is available as a W3C Recommendation and as an ISO
- * Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/
*/
/*
@@ -197,20 +25,16 @@
*
* This code is released under the libpng license.
*
- * libpng versions 1.2.6, August 15, 2004, through 1.5.7, December 15, 2011, are
- * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-1.2.5
- * with the following individual added to the list of Contributing Authors:
- *
- * Cosmin Truta
- *
- * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are
- * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-1.0.6
- * with the following individuals added to the list of Contributing Authors:
+ * libpng versions 1.0.7, July 1, 2000, through 1.5.26, December 17, 2015, are
+ * Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, are
+ * derived from libpng-1.0.6, and are distributed according to the same
+ * disclaimer and license as libpng-1.0.6 with the following individuals
+ * added to the list of Contributing Authors:
*
* Simon-Pierre Cadieux
* Eric S. Raymond
+ * Mans Rullgard
+ * Cosmin Truta
* Gilles Vollant
*
* and with the following additions to the disclaimer:
@@ -223,18 +47,20 @@
* the user.
*
* libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-0.96,
- * with the following individuals added to the list of Contributing Authors:
+ * Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
+ * libpng-0.96, and are distributed according to the same disclaimer and
+ * license as libpng-0.96, with the following individuals added to the list
+ * of Contributing Authors:
*
* Tom Lane
* Glenn Randers-Pehrson
* Willem van Schaik
*
* libpng versions 0.89, June 1996, through 0.96, May 1997, are
- * Copyright (c) 1996, 1997 Andreas Dilger
- * Distributed according to the same disclaimer and license as libpng-0.88,
- * with the following individuals added to the list of Contributing Authors:
+ * Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
+ * and are distributed according to the same disclaimer and license as
+ * libpng-0.88, with the following individuals added to the list of
+ * Contributing Authors:
*
* John Bowler
* Kevin Bracey
@@ -244,7 +70,7 @@
* Tom Tanner
*
* libpng versions 0.5, May 1995, through 0.88, January 1996, are
- * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
+ * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
@@ -272,29 +98,32 @@
* 2. Altered versions must be plainly marked as such and must not
* be misrepresented as being the original source.
*
- * 3. This Copyright notice may not be removed or altered from
- * any source or altered source distribution.
+ * 3. This Copyright notice may not be removed or altered from any
+ * source or altered source distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* supporting the PNG file format in commercial products. If you use this
* source code in a product, acknowledgment is not required but would be
* appreciated.
+ *
+ * END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
*/
/*
* A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like:
*
- * printf("%s", png_get_copyright(NULL));
+ * printf("%s", png_get_copyright(NULL));
*
* Also, the PNG logo (in PNG format, of course) is supplied in the
* files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
*/
/*
- * Libpng is OSI Certified Open Source Software. OSI Certified is a
- * certification mark of the Open Source Initiative.
+ * Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
+ * a certification mark of the Open Source Initiative. OSI has not addressed
+ * the additional disclaimers inserted at version 1.0.7.
*/
/*
@@ -305,17 +134,90 @@
* Thanks to Frank J. T. Wojcik for helping with the documentation.
*/
+/* Note about libpng version numbers:
+ *
+ * Due to various miscommunications, unforeseen code incompatibilities
+ * and occasional factors outside the authors' control, version numbering
+ * on the library has not always been consistent and straightforward.
+ * The following table summarizes matters since version 0.89c, which was
+ * the first widely used release:
+ *
+ * source png.h png.h shared-lib
+ * version string int version
+ * ------- ------ ----- ----------
+ * 0.89c "1.0 beta 3" 0.89 89 1.0.89
+ * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90]
+ * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95]
+ * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96]
+ * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97]
+ * 0.97c 0.97 97 2.0.97
+ * 0.98 0.98 98 2.0.98
+ * 0.99 0.99 98 2.0.99
+ * 0.99a-m 0.99 99 2.0.99
+ * 1.00 1.00 100 2.1.0 [100 should be 10000]
+ * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000]
+ * 1.0.1 png.h string is 10001 2.1.0
+ * 1.0.1a-e identical to the 10002 from here on, the shared library
+ * 1.0.2 source version) 10002 is 2.V where V is the source code
+ * 1.0.2a-b 10003 version, except as noted.
+ * 1.0.3 10003
+ * 1.0.3a-d 10004
+ * 1.0.4 10004
+ * 1.0.4a-f 10005
+ * 1.0.5 (+ 2 patches) 10005
+ * 1.0.5a-d 10006
+ * 1.0.5e-r 10100 (not source compatible)
+ * 1.0.5s-v 10006 (not binary compatible)
+ * 1.0.6 (+ 3 patches) 10006 (still binary incompatible)
+ * 1.0.6d-f 10007 (still binary incompatible)
+ * 1.0.6g 10007
+ * 1.0.6h 10007 10.6h (testing xy.z so-numbering)
+ * 1.0.6i 10007 10.6i
+ * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0)
+ * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible)
+ * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible)
+ * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
+ * 1.0.7 1 10007 (still compatible)
+ * ...
+ * 1.0.19 10 10019 10.so.0.19[.0]
+ * ...
+ * 1.2.53 13 10253 12.so.0.53[.0]
+ * ...
+ * 1.5.25 15 10525 15.so.15.25[.0]
+ *
+ * Henceforth the source version will match the shared-library major
+ * and minor numbers; the shared-library major version number will be
+ * used for changes in backward compatibility, as it is intended. The
+ * PNG_LIBPNG_VER macro, which is not used within libpng but is available
+ * for applications, is an unsigned integer of the form xyyzz corresponding
+ * to the source version x.y.z (leading zeros in y and z). Beta versions
+ * were given the previous public release number plus a letter, until
+ * version 1.0.6j; from then on they were given the upcoming public
+ * release number plus "betaNN" or "rcNN".
+ *
+ * Binary incompatibility exists only when applications make direct access
+ * to the info_ptr or png_ptr members through png.h, and the compiled
+ * application is loaded with a different version of the library.
+ *
+ * DLLNUM will change each time there are forward or backward changes
+ * in binary compatibility (e.g., when a new feature is added).
+ *
+ * See libpng.txt or libpng.3 for more information. The PNG specification
+ * is available as a W3C Recommendation and as an ISO Specification,
+ * <http://www.w3.org/TR/2003/REC-PNG-20031110/
+ */
+
/*
* Y2K compliance in libpng:
* =========================
*
- * December 15, 2011
+ * December 17, 2015
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.5.7 are Y2K compliant. It is my belief that
+ * upward through 1.5.26 are Y2K compliant. It is my belief that
* earlier versions were also Y2K compliant.
*
* Libpng only has two year fields. One is a 2-byte unsigned integer
@@ -326,7 +228,8 @@
* "png_uint_16 year" in png_time_struct.
*
* The string is
- * "png_char time_buffer" in png_struct
+ * "char time_buffer[29]" in png_struct. This will be no
+ * longer used in libpng-1.6.0 and will be removed from libpng-1.7.0.
*
* There are seven time-related functions:
* png.c: png_convert_to_rfc_1123() in png.c
@@ -366,16 +269,18 @@
/* This is not the place to learn how to use libpng. The file libpng-manual.txt
* describes how to use libpng, and the file example.c summarizes it
* with some code on which to build. This file is useful for looking
- * at the actual function definitions and structure components.
+ * at the actual function definitions and structure components. If that
+ * file has been stripped from your copy of libpng, you can find it at
+ * <http://www.libpng.org/pub/png/libpng-manual.txt>
*
* If you just need to read a PNG file and don't want to read the documentation
* skip to the end of this file and read the section entitled 'simplified API'.
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.5.7"
+#define PNG_LIBPNG_VER_STRING "1.5.26"
#define PNG_HEADER_VERSION_STRING \
- " libpng version 1.5.7 - December 15, 2011\n"
+ " libpng version 1.5.26 - December 17, 2015\n"
#define PNG_LIBPNG_VER_SONUM 15
#define PNG_LIBPNG_VER_DLLNUM 15
@@ -383,7 +288,7 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 5
-#define PNG_LIBPNG_VER_RELEASE 7
+#define PNG_LIBPNG_VER_RELEASE 26
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
@@ -406,7 +311,7 @@
#define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
PNG_LIBPNG_BUILD_PRIVATE */
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
* We must not include leading zeros.
@@ -414,7 +319,7 @@
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
*/
-#define PNG_LIBPNG_VER 10507 /* 1.5.7 */
+#define PNG_LIBPNG_VER 10526 /* 1.5.26 */
/* Library configuration: these options cannot be changed after
* the library has been built.
@@ -447,7 +352,7 @@
/* Machine specific configuration. */
# include "pngconf.h"
-#endif
+#endif /* PNG_VERSION_INFO_ONLY */
/*
* Added at libpng-1.2.8
@@ -536,7 +441,7 @@ extern "C" {
/* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number.
*/
-typedef char* png_libpng_version_1_5_7;
+typedef char* png_libpng_version_1_5_26;
/* Three color definitions. The order of the red, green, and blue, (and the
* exact size) is not important, although the size of the fields need to
@@ -1007,11 +912,13 @@ PNG_EXPORTA(5, png_structp, png_create_write_struct,
png_error_ptr warn_fn),
PNG_ALLOCATED);
+#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size,
(png_const_structp png_ptr));
PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr,
png_size_t size));
+#endif /* WRITE_CUSTOMIZE_COMPRESSION */
/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp
* match up.
@@ -1145,9 +1052,9 @@ PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr));
#define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/
PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr,
- int error_action, double red, double green));
+ int error_action, double red, double green))
PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr,
- int error_action, png_fixed_point red, png_fixed_point green));
+ int error_action, png_fixed_point red, png_fixed_point green))
PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp
png_ptr));
@@ -1215,9 +1122,9 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth,
#define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */
PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode,
- double output_gamma));
+ double output_gamma))
PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr,
- int mode, png_fixed_point output_gamma));
+ int mode, png_fixed_point output_gamma))
#endif
#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED)
@@ -1440,10 +1347,10 @@ PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr));
*/
PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr,
png_const_color_16p background_color, int background_gamma_code,
- int need_expand, double background_gamma));
+ int need_expand, double background_gamma))
PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr,
png_const_color_16p background_color, int background_gamma_code,
- int need_expand, png_fixed_point background_gamma));
+ int need_expand, png_fixed_point background_gamma))
#endif
#ifdef PNG_READ_BACKGROUND_SUPPORTED
# define PNG_BACKGROUND_GAMMA_UNKNOWN 0
@@ -1492,9 +1399,9 @@ PNG_EXPORT(49, void, png_set_quantize,
*/
PNG_FP_EXPORT(50, void, png_set_gamma,
(png_structp png_ptr, double screen_gamma,
- double override_file_gamma));
+ double override_file_gamma))
PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr,
- png_fixed_point screen_gamma, png_fixed_point override_file_gamma));
+ png_fixed_point screen_gamma, png_fixed_point override_file_gamma))
#endif
#ifdef PNG_WRITE_FLUSH_SUPPORTED
@@ -1623,47 +1530,17 @@ PNG_EXPORT(67, void, png_set_filter,
#define PNG_FILTER_VALUE_PAETH 4
#define PNG_FILTER_VALUE_LAST 5
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */
-/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_
- * defines, either the default (minimum-sum-of-absolute-differences), or
- * the experimental method (weighted-minimum-sum-of-absolute-differences).
- *
- * Weights are factors >= 1.0, indicating how important it is to keep the
- * filter type consistent between rows. Larger numbers mean the current
- * filter is that many times as likely to be the same as the "num_weights"
- * previous filters. This is cumulative for each previous row with a weight.
- * There needs to be "num_weights" values in "filter_weights", or it can be
- * NULL if the weights aren't being specified. Weights have no influence on
- * the selection of the first row filter. Well chosen weights can (in theory)
- * improve the compression for a given image.
- *
- * Costs are factors >= 1.0 indicating the relative decoding costs of a
- * filter type. Higher costs indicate more decoding expense, and are
- * therefore less likely to be selected over a filter with lower computational
- * costs. There needs to be a value in "filter_costs" for each valid filter
- * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't
- * setting the costs. Costs try to improve the speed of decompression without
- * unduly increasing the compressed image size.
- *
- * A negative weight or cost indicates the default value is to be used, and
- * values in the range [0.0, 1.0) indicate the value is to remain unchanged.
- * The default values for both weights and costs are currently 1.0, but may
- * change if good general weighting/cost heuristics can be found. If both
- * the weights and costs are set to 1.0, this degenerates the WEIGHTED method
- * to the UNWEIGHTED method, but with added encoding time/computation.
- */
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */
PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr,
int heuristic_method, int num_weights, png_const_doublep filter_weights,
- png_const_doublep filter_costs));
+ png_const_doublep filter_costs))
PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
(png_structp png_ptr,
int heuristic_method, int num_weights, png_const_fixed_point_p
- filter_weights, png_const_fixed_point_p filter_costs));
+ filter_weights, png_const_fixed_point_p filter_costs))
#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
-/* Heuristic used for row filter selection. These defines should NOT be
- * changed.
- */
+/* The following are no longer used and will be removed from libpng-1.7: */
#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */
#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */
#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */
@@ -1677,6 +1554,7 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
* for PNG images, and do considerably fewer caclulations. In the future,
* these values may not correspond directly to the zlib compression levels.
*/
+#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
PNG_EXPORT(69, void, png_set_compression_level,
(png_structp png_ptr, int level));
@@ -1694,7 +1572,7 @@ PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr,
PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr,
int method));
-#endif
+#endif /* WRITE_CUSTOMIZE_COMPRESSION */
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
/* Also set zlib parameters for compressing non-IDAT chunks */
@@ -1716,6 +1594,7 @@ PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp
PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr,
int method));
#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */
+#endif /* WRITE */
/* These next functions are called for input/output, memory, and error
* handling. They are in the file pngrio.c, pngwio.c, and pngerror.c,
@@ -1927,6 +1806,8 @@ PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr,
#else
/* Fatal error in PNG image of libpng - can't continue */
PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN);
+# define png_error(s1,s2) png_err(s1)
+# define png_chunk_error(s1,s2) png_err(s1)
#endif
#ifdef PNG_WARNINGS_SUPPORTED
@@ -1937,6 +1818,9 @@ PNG_EXPORT(105, void, png_warning, (png_structp png_ptr,
/* Non-fatal error in libpng, chunk name is prepended to message. */
PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr,
png_const_charp warning_message));
+#else
+# define png_warning(s1,s2) ((void)(s1))
+# define png_chunk_warning(s1,s2) ((void)(s1))
#endif
#ifdef PNG_BENIGN_ERRORS_SUPPORTED
@@ -2040,9 +1924,9 @@ PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter,
/* Returns pixel aspect ratio, computed from pHYs chunk data. */
PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio,
- (png_const_structp png_ptr, png_const_infop info_ptr));
+ (png_const_structp png_ptr, png_const_infop info_ptr))
PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed,
- (png_const_structp png_ptr, png_const_infop info_ptr));
+ (png_const_structp png_ptr, png_const_infop info_ptr))
/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */
PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels,
@@ -2075,11 +1959,11 @@ PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr,
PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr,
png_const_infop info_ptr, double *white_x, double *white_y, double *red_x,
double *red_y, double *green_x, double *green_y, double *blue_x,
- double *blue_y));
+ double *blue_y))
PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr,
png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z,
double *green_X, double *green_Y, double *green_Z, double *blue_X,
- double *blue_Y, double *blue_Z));
+ double *blue_Y, double *blue_Z))
#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */
PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
(png_const_structp png_ptr,
@@ -2087,7 +1971,7 @@ PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
png_fixed_point *int_white_y, png_fixed_point *int_red_x,
png_fixed_point *int_red_y, png_fixed_point *int_green_x,
png_fixed_point *int_green_y, png_fixed_point *int_blue_x,
- png_fixed_point *int_blue_y));
+ png_fixed_point *int_blue_y))
#endif
PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed,
(png_structp png_ptr, png_const_infop info_ptr,
@@ -2095,46 +1979,46 @@ PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed,
png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
- png_fixed_point *int_blue_Z));
+ png_fixed_point *int_blue_Z))
#endif
#ifdef PNG_cHRM_SUPPORTED
PNG_FP_EXPORT(135, void, png_set_cHRM,
(png_structp png_ptr, png_infop info_ptr,
double white_x, double white_y, double red_x, double red_y, double green_x,
- double green_y, double blue_x, double blue_y));
+ double green_y, double blue_x, double blue_y))
PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr,
png_infop info_ptr, double red_X, double red_Y, double red_Z,
double green_X, double green_Y, double green_Z, double blue_X,
- double blue_Y, double blue_Z));
+ double blue_Y, double blue_Z))
PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_white_x,
png_fixed_point int_white_y, png_fixed_point int_red_x,
png_fixed_point int_red_y, png_fixed_point int_green_x,
png_fixed_point int_green_y, png_fixed_point int_blue_x,
- png_fixed_point int_blue_y));
+ png_fixed_point int_blue_y))
PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr,
png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y,
png_fixed_point int_red_Z, png_fixed_point int_green_X,
png_fixed_point int_green_Y, png_fixed_point int_green_Z,
png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
- png_fixed_point int_blue_Z));
+ png_fixed_point int_blue_Z))
#endif
#ifdef PNG_gAMA_SUPPORTED
PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA,
(png_const_structp png_ptr, png_const_infop info_ptr,
- double *file_gamma));
+ double *file_gamma))
PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed,
(png_const_structp png_ptr, png_const_infop info_ptr,
- png_fixed_point *int_file_gamma));
+ png_fixed_point *int_file_gamma))
#endif
#ifdef PNG_gAMA_SUPPORTED
PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr,
- png_infop info_ptr, double file_gamma));
+ png_infop info_ptr, double file_gamma))
PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr,
- png_infop info_ptr, png_fixed_point int_file_gamma));
+ png_infop info_ptr, png_fixed_point int_file_gamma))
#endif
#ifdef PNG_hIST_SUPPORTED
@@ -2300,7 +2184,7 @@ PNG_EXPORT(167, void, png_set_tRNS,
#ifdef PNG_sCAL_SUPPORTED
PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL,
(png_const_structp png_ptr, png_const_infop info_ptr,
- int *unit, double *width, double *height));
+ int *unit, double *width, double *height))
#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED
/* NOTE: this API is currently implemented using floating point arithmetic,
* consequently it can only be used on systems with floating point support.
@@ -2310,7 +2194,7 @@ PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL,
PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed,
(png_structp png_ptr, png_const_infop info_ptr, int *unit,
png_fixed_point *width,
- png_fixed_point *height));
+ png_fixed_point *height))
#endif
PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
(png_const_structp png_ptr, png_const_infop info_ptr,
@@ -2318,10 +2202,10 @@ PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
PNG_FP_EXPORT(170, void, png_set_sCAL,
(png_structp png_ptr, png_infop info_ptr,
- int unit, double width, double height));
+ int unit, double width, double height))
PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr,
png_infop info_ptr, int unit, png_fixed_point width,
- png_fixed_point height));
+ png_fixed_point height))
PNG_EXPORT(171, void, png_set_sCAL_s,
(png_structp png_ptr, png_infop info_ptr,
int unit, png_const_charp swidth, png_const_charp sheight));
@@ -2434,17 +2318,17 @@ PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch,
(png_const_structp png_ptr, png_const_infop info_ptr));
PNG_FP_EXPORT(196, float, png_get_x_offset_inches,
- (png_const_structp png_ptr, png_const_infop info_ptr));
+ (png_const_structp png_ptr, png_const_infop info_ptr))
#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed,
- (png_structp png_ptr, png_const_infop info_ptr));
+ (png_structp png_ptr, png_const_infop info_ptr))
#endif
PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr,
- png_const_infop info_ptr));
+ png_const_infop info_ptr))
#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed,
- (png_structp png_ptr, png_const_infop info_ptr));
+ (png_structp png_ptr, png_const_infop info_ptr))
#endif
# ifdef PNG_pHYs_SUPPORTED
@@ -2627,10 +2511,60 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
# define png_get_int_32(buf) \
((png_int_32)((*(buf) & 0x80) \
- ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
+ ? -((png_int_32)(((png_get_uint_32(buf)^0xffffffffU)+1U)&0x7fffffffU)) \
: (png_int_32)png_get_uint_32(buf)))
#endif
+#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
+PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr,
+ int allowed));
+# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
+PNG_EXPORT(235, int, png_get_palette_max, (png_const_structp png_ptr,
+ png_const_infop info_ptr));
+# endif
+#endif /* CHECK_FOR_INVALID_INDEX */
+
+/*******************************************************************************
+ * IMPLEMENTATION OPTIONS
+ *******************************************************************************
+ *
+ * Support for arbitrary implementation-specific optimizations. The API allows
+ * particular options to be turned on or off. 'Option' is the number of the
+ * option and 'onoff' is 0 (off) or non-0 (on). The value returned is given
+ * by the PNG_OPTION_ defines below.
+ *
+ * HARDWARE: normally hardware capabilites, such as the Intel SSE instructions,
+ * are detected at run time, however sometimes it may be impossible
+ * to do this in user mode, in which case it is necessary to discover
+ * the capabilities in an OS specific way. Such capabilities are
+ * listed here when libpng has support for them and must be turned
+ * ON by the application if present.
+ *
+ * SOFTWARE: sometimes software optimizations actually result in performance
+ * decrease on some architectures or systems, or with some sets of
+ * PNG images. 'Software' options allow such optimizations to be
+ * selected at run time.
+ */
+#ifdef PNG_SET_OPTION_SUPPORTED
+#ifdef PNG_ARM_NEON_API_SUPPORTED
+# define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */
+#endif
+#define PNG_OPTION_NEXT 2 /* Next option - numbers must be even */
+
+/* Return values: NOTE: there are four values and 'off' is *not* zero */
+#define PNG_OPTION_UNSET 0 /* Unset - defaults to off */
+#define PNG_OPTION_INVALID 1 /* Option number out of range */
+#define PNG_OPTION_OFF 2
+#define PNG_OPTION_ON 3
+
+PNG_EXPORT(236, int, png_set_option, (png_structp png_ptr, int option,
+ int onoff));
+#endif
+
+/*******************************************************************************
+ * END OF HARDWARE OPTIONS
+ ******************************************************************************/
+
/* Maintainer: Put new public prototypes here ^, in libpng.3, and project
* defs
*/
@@ -2640,7 +2574,7 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i));
* scripts/symbols.def as well.
*/
#ifdef PNG_EXPORT_LAST_ORDINAL
- PNG_EXPORT_LAST_ORDINAL(233);
+ PNG_EXPORT_LAST_ORDINAL(236);
#endif
#ifdef __cplusplus
diff --git a/drivers/png/pngconf.h b/drivers/png/pngconf.h
index d07054de28..62588337d0 100644
--- a/drivers/png/pngconf.h
+++ b/drivers/png/pngconf.h
@@ -1,9 +1,9 @@
/* pngconf.h - machine configurable file for libpng
*
- * libpng version 1.5.7 - December 15, 2011
+ * libpng version 1.5.26, December 17, 2015
*
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002,2004,2006-2013 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -11,9 +11,7 @@
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
- */
-
-/* Any machine specific code is near the front of this file, so if you
+ * Any machine specific code is near the front of this file, so if you
* are configuring libpng for a machine, you may want to read the section
* starting here down to where it starts to typedef png_color, png_text,
* and png_info.
@@ -25,7 +23,7 @@
#ifndef PNG_BUILDING_SYMBOL_TABLE
/* PNG_NO_LIMITS_H may be used to turn off the use of the standard C
* definition file for machine specific limits, this may impact the
- * correctness of the definitons below (see uses of INT_MAX).
+ * correctness of the definitions below (see uses of INT_MAX).
*/
# ifndef PNG_NO_LIMITS_H
# include <limits.h>
@@ -51,8 +49,8 @@
/* This controls optimization of the reading of 16 and 32 bit values
* from PNG files. It can be set on a per-app-file basis - it
- * just changes whether a macro is used to the function is called.
- * The library builder sets the default, if read functions are not
+ * just changes whether a macro is used when the function is called.
+ * The library builder sets the default; if read functions are not
* built into the library the macro implementation is forced on.
*/
#ifndef PNG_READ_INT_FUNCTIONS_SUPPORTED
@@ -177,18 +175,16 @@
* ==========================
* This code is used at build time to find PNG_IMPEXP, the API settings
* and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
- * import processing is possible. On Windows/x86 systems it also sets
+ * import processing is possible. On Windows systems it also sets
* compiler-specific macros to the values required to change the calling
* conventions of the various functions.
*/
-#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
- defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
- ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
- defined(_M_X64) || defined(_M_IA64) )
- /* Windows system (DOS doesn't support DLLs) running on x86/x64. Includes
- * builds under Cygwin or MinGW. Also includes Watcom builds but these need
- * special treatment because they are not compatible with GCC or Visual C
- * because of different calling conventions.
+#if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
+ defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+ /* Windows system (DOS doesn't support DLLs). Includes builds under Cygwin or
+ * MinGW on any architecture currently supported by Windows. Also includes
+ * Watcom builds but these need special treatment because they are not
+ * compatible with GCC or Visual C because of different calling conventions.
*/
# if PNG_API_RULE == 2
/* If this line results in an error, either because __watcall is not
@@ -199,9 +195,12 @@
# define PNGCAPI __watcall
# endif
-# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
+# if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
# define PNGCAPI __cdecl
# if PNG_API_RULE == 1
+ /* If this line results in an error __stdcall is not understood and
+ * PNG_API_RULE should not have been set to '1'.
+ */
# define PNGAPI __stdcall
# endif
# else
@@ -239,7 +238,7 @@
# endif
# endif /* compiler */
-#else /* !Windows/x86 */
+#else /* !Windows */
# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
# define PNGAPI _System
# else /* !Windows/x86 && !OS/2 */
@@ -337,6 +336,7 @@
* functions in png.h will generate compiler warnings. Added at libpng
* version 1.2.41.
*/
+
# if defined(__GNUC__)
# ifndef PNG_USE_RESULT
# define PNG_USE_RESULT __attribute__((__warn_unused_result__))
@@ -344,21 +344,23 @@
# ifndef PNG_NORETURN
# define PNG_NORETURN __attribute__((__noreturn__))
# endif
-# ifndef PNG_ALLOCATED
-# define PNG_ALLOCATED __attribute__((__malloc__))
-# endif
-# ifndef PNG_DEPRECATED
-# define PNG_DEPRECATED __attribute__((__deprecated__))
-# endif
-# ifndef PNG_PRIVATE
-# if 0 /* Doesn't work so we use deprecated instead*/
-# define PNG_PRIVATE \
- __attribute__((warning("This function is not exported by libpng.")))
-# else
-# define PNG_PRIVATE \
- __attribute__((__deprecated__))
+# if __GNUC__ >= 3
+# ifndef PNG_ALLOCATED
+# define PNG_ALLOCATED __attribute__((__malloc__))
# endif
-# endif
+# ifndef PNG_DEPRECATED
+# define PNG_DEPRECATED __attribute__((__deprecated__))
+# endif
+# ifndef PNG_PRIVATE
+# if 0 /* Doesn't work so we use deprecated instead*/
+# define PNG_PRIVATE \
+ __attribute__((warning("This function is not exported by libpng.")))
+# else
+# define PNG_PRIVATE \
+ __attribute__((__deprecated__))
+# endif
+# endif
+# endif /* __GNUC__ >= 3 */
# endif /* __GNUC__ */
# if defined(_MSC_VER) && (_MSC_VER >= 1300)
@@ -400,7 +402,7 @@
#ifndef PNG_FP_EXPORT /* A floating point API. */
# ifdef PNG_FLOATING_POINT_SUPPORTED
# define PNG_FP_EXPORT(ordinal, type, name, args)\
- PNG_EXPORT(ordinal, type, name, args)
+ PNG_EXPORT(ordinal, type, name, args);
# else /* No floating point APIs */
# define PNG_FP_EXPORT(ordinal, type, name, args)
# endif
@@ -408,7 +410,7 @@
#ifndef PNG_FIXED_EXPORT /* A fixed point API. */
# ifdef PNG_FIXED_POINT_SUPPORTED
# define PNG_FIXED_EXPORT(ordinal, type, name, args)\
- PNG_EXPORT(ordinal, type, name, args)
+ PNG_EXPORT(ordinal, type, name, args);
# else /* No fixed point APIs */
# define PNG_FIXED_EXPORT(ordinal, type, name, args)
# endif
diff --git a/drivers/png/pngdebug.h b/drivers/png/pngdebug.h
index 16f81fdd14..020369f061 100644
--- a/drivers/png/pngdebug.h
+++ b/drivers/png/pngdebug.h
@@ -1,12 +1,11 @@
/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
*
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.18 [February 6, 2014]
+ * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
- * Last changed in libpng 1.5.0 [January 6, 2011]
- *
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
@@ -25,7 +24,7 @@
* (actually ((void)0)).
*
* level: level of detail of message, starting at 0. A level 'n'
- * message is preceded by 'n' tab characters (not implemented
+ * message is preceded by 'n' 3-space indentations (not implemented
* on Microsoft compilers unless PNG_DEBUG_FILE is also
* defined, to allow debug DLL compilation with no standard IO).
* message: a printf(3) style text string. A trailing '\n' is added
@@ -77,32 +76,29 @@
# endif /* PNG_DEBUG_FILE */
# if (PNG_DEBUG > 1)
-/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
- * non-ISO compilers
- */
# ifdef __STDC__
# ifndef png_debug
# define png_debug(l,m) \
do { \
int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
+ fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
+ (num_tabs==2 ? " " : (num_tabs>2 ? " " : "")))); \
} while (0)
# endif
# ifndef png_debug1
# define png_debug1(l,m,p1) \
do { \
int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
+ fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
+ (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1); \
} while (0)
# endif
# ifndef png_debug2
# define png_debug2(l,m,p1,p2) \
do { \
int num_tabs=l; \
- fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
- (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
+ fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
+ (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1,p2);\
} while (0)
# endif
# else /* __STDC __ */
diff --git a/drivers/png/pngerror.c b/drivers/png/pngerror.c
index 7604bddf18..372d1b6fbd 100644
--- a/drivers/png/pngerror.c
+++ b/drivers/png/pngerror.c
@@ -1,8 +1,8 @@
/* pngerror.c - stub functions for i/o and memory allocation
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.19 [August 21, 2014]
+ * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -161,7 +161,7 @@ png_format_number(png_const_charp start, png_charp end, int format,
case PNG_NUMBER_FORMAT_02u:
/* Expects at least 2 digits. */
mincount = 2;
- /* fall through */
+ /* FALL THROUGH */
case PNG_NUMBER_FORMAT_u:
*--end = digits[number % 10];
@@ -171,7 +171,7 @@ png_format_number(png_const_charp start, png_charp end, int format,
case PNG_NUMBER_FORMAT_02x:
/* This format expects at least two digits */
mincount = 2;
- /* fall through */
+ /* FALL THROUGH */
case PNG_NUMBER_FORMAT_x:
*--end = digits[number & 0xf];
@@ -193,7 +193,7 @@ png_format_number(png_const_charp start, png_charp end, int format,
* drop the decimal point. If the number is a true zero handle that
* here.
*/
- if (output)
+ if (output != 0)
*--end = '.';
else if (number == 0) /* and !output */
*--end = '0';
@@ -281,35 +281,40 @@ void
png_formatted_warning(png_structp png_ptr, png_warning_parameters p,
png_const_charp message)
{
- /* The internal buffer is just 128 bytes - enough for all our messages,
- * overflow doesn't happen because this code checks!
+ /* The internal buffer is just 192 bytes - enough for all our messages,
+ * overflow doesn't happen because this code checks! If someone figures
+ * out how to send us a message longer than 192 bytes, all that will
+ * happen is that the message will be truncated appropriately.
*/
- size_t i;
- char msg[128];
-
- for (i=0; i<(sizeof msg)-1 && *message != '\0'; ++i)
+ size_t i = 0; /* Index in the msg[] buffer: */
+ char msg[192];
+
+ /* Each iteration through the following loop writes at most one character
+ * to msg[i++] then returns here to validate that there is still space for
+ * the trailing '\0'. It may (in the case of a parameter) read more than
+ * one character from message[]; it must check for '\0' and continue to the
+ * test if it finds the end of string.
+ */
+ while (i<(sizeof msg)-1 && *message != '\0')
{
- if (*message == '@')
+ /* '@' at end of string is now just printed (previously it was skipped);
+ * it is an error in the calling code to terminate the string with @.
+ */
+ if (p != NULL && *message == '@' && message[1] != '\0')
{
- int parameter = -1;
- switch (*++message)
- {
- case '1':
- parameter = 0;
- break;
-
- case '2':
- parameter = 1;
- break;
+ int parameter_char = *++message; /* Consume the '@' */
+ static const char valid_parameters[] = "123456789";
+ int parameter = 0;
- case '\0':
- continue; /* To break out of the for loop above. */
-
- default:
- break;
- }
+ /* Search for the parameter digit, the index in the string is the
+ * parameter to use.
+ */
+ while (valid_parameters[parameter] != parameter_char &&
+ valid_parameters[parameter] != '\0')
+ ++parameter;
- if (parameter >= 0 && parameter < PNG_WARNING_PARAMETER_COUNT)
+ /* If the parameter digit is out of range it will just get printed. */
+ if (parameter < PNG_WARNING_PARAMETER_COUNT)
{
/* Append this parameter */
png_const_charp parm = p[parameter];
@@ -319,28 +324,32 @@ png_formatted_warning(png_structp png_ptr, png_warning_parameters p,
* that parm[] has been initialized, so there is no guarantee of a
* trailing '\0':
*/
- for (; i<(sizeof msg)-1 && parm != '\0' && parm < pend; ++i)
- msg[i] = *parm++;
+ while (i<(sizeof msg)-1 && *parm != '\0' && parm < pend)
+ msg[i++] = *parm++;
+ /* Consume the parameter digit too: */
++message;
continue;
}
/* else not a parameter and there is a character after the @ sign; just
- * copy that.
+ * copy that. This is known not to be '\0' because of the test above.
*/
}
/* At this point *message can't be '\0', even in the bad parameter case
* above where there is a lone '@' at the end of the message string.
*/
- msg[i] = *message++;
+ msg[i++] = *message++;
}
/* i is always less than (sizeof msg), so: */
msg[i] = '\0';
- /* And this is the formatted message: */
+ /* And this is the formatted message, it may be larger than
+ * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these are
+ * not (currently) formatted.
+ */
png_warning(png_ptr, msg);
}
#endif /* PNG_WARNINGS_SUPPORTED */
@@ -569,6 +578,9 @@ png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN)
png_ptr->longjmp_fn(png_ptr->longjmp_buffer, val);
# endif
}
+#else
+ PNG_UNUSED(png_ptr);
+ PNG_UNUSED(val);
#endif
/* Here if not setjmp support or if png_ptr is null. */
PNG_ABORT();
diff --git a/drivers/png/pngget.c b/drivers/png/pngget.c
index 43400cda7e..5b1d757c66 100644
--- a/drivers/png/pngget.c
+++ b/drivers/png/pngget.c
@@ -1,8 +1,8 @@
/* pngget.c - retrieval of values from info struct
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.19 [August 21, 2014]
+ * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -123,6 +123,9 @@ png_get_x_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return (info_ptr->x_pixels_per_unit);
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return (0);
@@ -140,6 +143,9 @@ png_get_y_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->phys_unit_type == PNG_RESOLUTION_METER)
return (info_ptr->y_pixels_per_unit);
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return (0);
@@ -157,6 +163,9 @@ png_get_pixels_per_meter(png_const_structp png_ptr, png_const_infop info_ptr)
info_ptr->x_pixels_per_unit == info_ptr->y_pixels_per_unit)
return (info_ptr->x_pixels_per_unit);
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return (0);
@@ -175,6 +184,9 @@ png_get_pixel_aspect_ratio(png_const_structp png_ptr, png_const_infop info_ptr)
return ((float)((float)info_ptr->y_pixels_per_unit
/(float)info_ptr->x_pixels_per_unit));
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return ((float)0.0);
@@ -203,6 +215,9 @@ png_get_pixel_aspect_ratio_fixed(png_const_structp png_ptr,
(png_int_32)info_ptr->x_pixels_per_unit))
return res;
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return 0;
@@ -220,6 +235,9 @@ png_get_x_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return (info_ptr->x_offset);
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return (0);
@@ -236,6 +254,9 @@ png_get_y_offset_microns(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_MICROMETER)
return (info_ptr->y_offset);
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return (0);
@@ -252,6 +273,9 @@ png_get_x_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return (info_ptr->x_offset);
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return (0);
@@ -268,6 +292,9 @@ png_get_y_offset_pixels(png_const_structp png_ptr, png_const_infop info_ptr)
if (info_ptr->offset_unit_type == PNG_OFFSET_PIXEL)
return (info_ptr->y_offset);
}
+#else
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(info_ptr)
#endif
return (0);
@@ -646,7 +673,7 @@ png_get_gAMA(png_const_structp png_ptr, png_const_infop info_ptr,
png_fixed_point igamma;
png_uint_32 ok = png_get_gAMA_fixed(png_ptr, info_ptr, &igamma);
- if (ok)
+ if (ok != 0)
*file_gamma = png_float(png_ptr, igamma, "png_get_gAMA");
return ok;
@@ -741,14 +768,20 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
{
png_debug1(1, "in %s retrieval function", "IHDR");
- if (png_ptr == NULL || info_ptr == NULL || width == NULL ||
- height == NULL || bit_depth == NULL || color_type == NULL)
+ if (png_ptr == NULL || info_ptr == NULL)
return (0);
- *width = info_ptr->width;
- *height = info_ptr->height;
- *bit_depth = info_ptr->bit_depth;
- *color_type = info_ptr->color_type;
+ if (width != NULL)
+ *width = info_ptr->width;
+
+ if (height != NULL)
+ *height = info_ptr->height;
+
+ if (bit_depth != NULL)
+ *bit_depth = info_ptr->bit_depth;
+
+ if (color_type != NULL)
+ *color_type = info_ptr->color_type;
if (compression_type != NULL)
*compression_type = info_ptr->compression_type;
@@ -1121,4 +1154,17 @@ png_get_io_chunk_name (png_structp png_ptr)
}
#endif /* ?PNG_IO_STATE_SUPPORTED */
+#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
+# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
+int PNGAPI
+png_get_palette_max(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+ if (png_ptr != NULL && info_ptr != NULL)
+ return png_ptr->num_palette_max;
+
+ return (-1);
+}
+# endif
+#endif
+
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
diff --git a/drivers/png/pnginfo.h b/drivers/png/pnginfo.h
index a33bfab06d..c5b68c1e84 100644
--- a/drivers/png/pnginfo.h
+++ b/drivers/png/pnginfo.h
@@ -1,12 +1,11 @@
/* pnginfo.h - header file for PNG reference library
*
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.0 [January 6, 2011]
+ * Copyright (c) 1998-2002,2004,2006-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
- * Last changed in libpng 1.5.0 [January 6, 2011]
- *
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
@@ -242,7 +241,7 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
#ifdef PNG_sPLT_SUPPORTED
/* Data on sPLT chunks (there may be more than one). */
png_sPLT_tp splt_palettes;
- png_uint_32 splt_palettes_num;
+ int splt_palettes_num;
#endif
#ifdef PNG_sCAL_SUPPORTED
diff --git a/drivers/png/pnglibconf.h b/drivers/png/pnglibconf.h
index 0a799915f8..37f63f2721 100644
--- a/drivers/png/pnglibconf.h
+++ b/drivers/png/pnglibconf.h
@@ -1,51 +1,28 @@
-
-/* libpng STANDARD API DEFINITION */
-
+/* 1.5.26 STANDARD API DEFINITION */
/* pnglibconf.h - library build configuration */
-/* Libpng 1.5.7 - December 15, 2011 */
+/* libpng version 1.5.26 - December 17, 2015 */
-/* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
+/* Copyright (c) 1998-2015 Glenn Randers-Pehrson */
/* This code is released under the libpng license. */
/* For conditions of distribution and use, see the disclaimer */
/* and license in png.h */
/* pnglibconf.h */
+/* Machine generated file: DO NOT EDIT */
/* Derived from: scripts/pnglibconf.dfa */
-/* If you edit this file by hand you must obey the rules expressed in */
-/* pnglibconf.dfa with respect to the dependencies between the following */
-/* symbols. It is much better to generate a new file using */
-/* scripts/libpngconf.mak */
-
#ifndef PNGLCONF_H
#define PNGLCONF_H
-/* settings */
-#define PNG_API_RULE 0
-#define PNG_CALLOC_SUPPORTED
-#define PNG_COST_SHIFT 3
-#define PNG_DEFAULT_READ_MACROS 1
-#define PNG_GAMMA_THRESHOLD_FIXED 5000
-#define PNG_MAX_GAMMA_8 11
-#define PNG_QUANTIZE_BLUE_BITS 5
-#define PNG_QUANTIZE_GREEN_BITS 5
-#define PNG_QUANTIZE_RED_BITS 5
-#define PNG_sCAL_PRECISION 5
-#define PNG_USER_CHUNK_CACHE_MAX 0
-#define PNG_USER_CHUNK_MALLOC_MAX 0
-#define PNG_USER_HEIGHT_MAX 1000000
-#define PNG_USER_WIDTH_MAX 1000000
-#define PNG_WEIGHT_SHIFT 8
-#define PNG_ZBUF_SIZE 8192
-/* end of settings */
/* options */
#define PNG_16BIT_SUPPORTED
-#define PNG_ALIGN_MEMORY_SUPPORTED
+#define PNG_ALIGNED_MEMORY_SUPPORTED
+/*#undef PNG_ARM_NEON_API_SUPPORTED*/
+/*#undef PNG_ARM_NEON_CHECK_SUPPORTED*/
#define PNG_BENIGN_ERRORS_SUPPORTED
-#define PNG_bKGD_SUPPORTED
#define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
+#define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_CHECK_cHRM_SUPPORTED
-#define PNG_cHRM_SUPPORTED
#define PNG_CONSOLE_IO_SUPPORTED
#define PNG_CONVERT_tIME_SUPPORTED
#define PNG_EASY_ACCESS_SUPPORTED
@@ -54,20 +31,12 @@
#define PNG_FIXED_POINT_SUPPORTED
#define PNG_FLOATING_ARITHMETIC_SUPPORTED
#define PNG_FLOATING_POINT_SUPPORTED
-#define PNG_FORMAT_AFIRST_SUPPORTED
-#define PNG_FORMAT_BGR_SUPPORTED
-#define PNG_gAMA_SUPPORTED
+#define PNG_GET_PALETTE_MAX_SUPPORTED
#define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-#define PNG_hIST_SUPPORTED
-#define PNG_iCCP_SUPPORTED
#define PNG_INCH_CONVERSIONS_SUPPORTED
#define PNG_INFO_IMAGE_SUPPORTED
#define PNG_IO_STATE_SUPPORTED
-#define PNG_iTXt_SUPPORTED
#define PNG_MNG_FEATURES_SUPPORTED
-#define PNG_oFFs_SUPPORTED
-#define PNG_pCAL_SUPPORTED
-#define PNG_pHYs_SUPPORTED
#define PNG_POINTER_INDEXING_SUPPORTED
#define PNG_PROGRESSIVE_READ_SUPPORTED
#define PNG_READ_16BIT_SUPPORTED
@@ -75,67 +44,62 @@
#define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
#define PNG_READ_BACKGROUND_SUPPORTED
#define PNG_READ_BGR_SUPPORTED
-#define PNG_READ_bKGD_SUPPORTED
-#define PNG_READ_cHRM_SUPPORTED
+#define PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_READ_COMPOSITE_NODIV_SUPPORTED
#define PNG_READ_COMPRESSED_TEXT_SUPPORTED
#define PNG_READ_EXPAND_16_SUPPORTED
#define PNG_READ_EXPAND_SUPPORTED
#define PNG_READ_FILLER_SUPPORTED
-#define PNG_READ_gAMA_SUPPORTED
#define PNG_READ_GAMMA_SUPPORTED
+#define PNG_READ_GET_PALETTE_MAX_SUPPORTED
#define PNG_READ_GRAY_TO_RGB_SUPPORTED
-#define PNG_READ_hIST_SUPPORTED
-#define PNG_READ_iCCP_SUPPORTED
#define PNG_READ_INTERLACING_SUPPORTED
#define PNG_READ_INT_FUNCTIONS_SUPPORTED
#define PNG_READ_INVERT_ALPHA_SUPPORTED
#define PNG_READ_INVERT_SUPPORTED
-#define PNG_READ_iTXt_SUPPORTED
-#define PNG_READ_oFFs_SUPPORTED
#define PNG_READ_OPT_PLTE_SUPPORTED
-#define PNG_READ_PACK_SUPPORTED
#define PNG_READ_PACKSWAP_SUPPORTED
-#define PNG_READ_pCAL_SUPPORTED
-#define PNG_READ_pHYs_SUPPORTED
+#define PNG_READ_PACK_SUPPORTED
#define PNG_READ_QUANTIZE_SUPPORTED
#define PNG_READ_RGB_TO_GRAY_SUPPORTED
-#define PNG_READ_sBIT_SUPPORTED
#define PNG_READ_SCALE_16_TO_8_SUPPORTED
-#define PNG_READ_sCAL_SUPPORTED
#define PNG_READ_SHIFT_SUPPORTED
-#define PNG_READ_sPLT_SUPPORTED
-#define PNG_READ_sRGB_SUPPORTED
#define PNG_READ_STRIP_16_TO_8_SUPPORTED
#define PNG_READ_STRIP_ALPHA_SUPPORTED
#define PNG_READ_SUPPORTED
#define PNG_READ_SWAP_ALPHA_SUPPORTED
#define PNG_READ_SWAP_SUPPORTED
-#define PNG_READ_tEXt_SUPPORTED
#define PNG_READ_TEXT_SUPPORTED
-#define PNG_READ_tIME_SUPPORTED
#define PNG_READ_TRANSFORMS_SUPPORTED
-#define PNG_READ_tRNS_SUPPORTED
#define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_READ_USER_CHUNKS_SUPPORTED
#define PNG_READ_USER_TRANSFORM_SUPPORTED
+#define PNG_READ_bKGD_SUPPORTED
+#define PNG_READ_cHRM_SUPPORTED
+#define PNG_READ_gAMA_SUPPORTED
+#define PNG_READ_hIST_SUPPORTED
+#define PNG_READ_iCCP_SUPPORTED
+#define PNG_READ_iTXt_SUPPORTED
+#define PNG_READ_oFFs_SUPPORTED
+#define PNG_READ_pCAL_SUPPORTED
+#define PNG_READ_pHYs_SUPPORTED
+#define PNG_READ_sBIT_SUPPORTED
+#define PNG_READ_sCAL_SUPPORTED
+#define PNG_READ_sPLT_SUPPORTED
+#define PNG_READ_sRGB_SUPPORTED
+#define PNG_READ_tEXt_SUPPORTED
+#define PNG_READ_tIME_SUPPORTED
+#define PNG_READ_tRNS_SUPPORTED
#define PNG_READ_zTXt_SUPPORTED
+/*#undef PNG_SAFE_LIMITS_SUPPORTED*/
#define PNG_SAVE_INT_32_SUPPORTED
-#define PNG_sBIT_SUPPORTED
-#define PNG_sCAL_SUPPORTED
#define PNG_SEQUENTIAL_READ_SUPPORTED
-#define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
-#define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
#define PNG_SETJMP_SUPPORTED
+/*#undef PNG_SET_OPTION_SUPPORTED*/
#define PNG_SET_USER_LIMITS_SUPPORTED
-#define PNG_sPLT_SUPPORTED
-#define PNG_sRGB_SUPPORTED
#define PNG_STDIO_SUPPORTED
-#define PNG_tEXt_SUPPORTED
#define PNG_TEXT_SUPPORTED
#define PNG_TIME_RFC1123_SUPPORTED
-#define PNG_tIME_SUPPORTED
-#define PNG_tRNS_SUPPORTED
#define PNG_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_USER_CHUNKS_SUPPORTED
#define PNG_USER_LIMITS_SUPPORTED
@@ -146,44 +110,78 @@
#define PNG_WRITE_16BIT_SUPPORTED
#define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
#define PNG_WRITE_BGR_SUPPORTED
-#define PNG_WRITE_bKGD_SUPPORTED
-#define PNG_WRITE_cHRM_SUPPORTED
+#define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
#define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
+#define PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
#define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
#define PNG_WRITE_FILLER_SUPPORTED
#define PNG_WRITE_FILTER_SUPPORTED
#define PNG_WRITE_FLUSH_SUPPORTED
-#define PNG_WRITE_gAMA_SUPPORTED
-#define PNG_WRITE_hIST_SUPPORTED
-#define PNG_WRITE_iCCP_SUPPORTED
+#define PNG_WRITE_GET_PALETTE_MAX_SUPPORTED
#define PNG_WRITE_INTERLACING_SUPPORTED
#define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
#define PNG_WRITE_INVERT_ALPHA_SUPPORTED
#define PNG_WRITE_INVERT_SUPPORTED
-#define PNG_WRITE_iTXt_SUPPORTED
-#define PNG_WRITE_oFFs_SUPPORTED
#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
-#define PNG_WRITE_PACK_SUPPORTED
#define PNG_WRITE_PACKSWAP_SUPPORTED
-#define PNG_WRITE_pCAL_SUPPORTED
-#define PNG_WRITE_pHYs_SUPPORTED
-#define PNG_WRITE_sBIT_SUPPORTED
-#define PNG_WRITE_sCAL_SUPPORTED
+#define PNG_WRITE_PACK_SUPPORTED
#define PNG_WRITE_SHIFT_SUPPORTED
-#define PNG_WRITE_sPLT_SUPPORTED
-#define PNG_WRITE_sRGB_SUPPORTED
#define PNG_WRITE_SUPPORTED
#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
#define PNG_WRITE_SWAP_SUPPORTED
-#define PNG_WRITE_tEXt_SUPPORTED
#define PNG_WRITE_TEXT_SUPPORTED
-#define PNG_WRITE_tIME_SUPPORTED
#define PNG_WRITE_TRANSFORMS_SUPPORTED
-#define PNG_WRITE_tRNS_SUPPORTED
#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+#define PNG_WRITE_bKGD_SUPPORTED
+#define PNG_WRITE_cHRM_SUPPORTED
+#define PNG_WRITE_gAMA_SUPPORTED
+#define PNG_WRITE_hIST_SUPPORTED
+#define PNG_WRITE_iCCP_SUPPORTED
+#define PNG_WRITE_iTXt_SUPPORTED
+#define PNG_WRITE_oFFs_SUPPORTED
+#define PNG_WRITE_pCAL_SUPPORTED
+#define PNG_WRITE_pHYs_SUPPORTED
+#define PNG_WRITE_sBIT_SUPPORTED
+#define PNG_WRITE_sCAL_SUPPORTED
+#define PNG_WRITE_sPLT_SUPPORTED
+#define PNG_WRITE_sRGB_SUPPORTED
+#define PNG_WRITE_tEXt_SUPPORTED
+#define PNG_WRITE_tIME_SUPPORTED
+#define PNG_WRITE_tRNS_SUPPORTED
#define PNG_WRITE_zTXt_SUPPORTED
+#define PNG_bKGD_SUPPORTED
+#define PNG_cHRM_SUPPORTED
+#define PNG_gAMA_SUPPORTED
+#define PNG_hIST_SUPPORTED
+#define PNG_iCCP_SUPPORTED
+#define PNG_iTXt_SUPPORTED
+#define PNG_oFFs_SUPPORTED
+#define PNG_pCAL_SUPPORTED
+#define PNG_pHYs_SUPPORTED
+#define PNG_sBIT_SUPPORTED
+#define PNG_sCAL_SUPPORTED
+#define PNG_sPLT_SUPPORTED
+#define PNG_sRGB_SUPPORTED
+#define PNG_tEXt_SUPPORTED
+#define PNG_tIME_SUPPORTED
+#define PNG_tRNS_SUPPORTED
#define PNG_zTXt_SUPPORTED
/* end of options */
+/* settings */
+#define PNG_API_RULE 0
+#define PNG_DEFAULT_READ_MACROS 1
+#define PNG_GAMMA_THRESHOLD_FIXED 5000
+#define PNG_MAX_GAMMA_8 11
+#define PNG_QUANTIZE_BLUE_BITS 5
+#define PNG_QUANTIZE_GREEN_BITS 5
+#define PNG_QUANTIZE_RED_BITS 5
+#define PNG_USER_CHUNK_CACHE_MAX 1000
+#define PNG_USER_CHUNK_MALLOC_MAX 8000000
+#define PNG_USER_HEIGHT_MAX 1000000
+#define PNG_USER_WIDTH_MAX 1000000
+#define PNG_ZBUF_SIZE 8192
+#define PNG_sCAL_PRECISION 5
+/* end of settings */
#endif /* PNGLCONF_H */
diff --git a/drivers/png/pngmem.c b/drivers/png/pngmem.c
index bf5ff037da..ae74dcace0 100644
--- a/drivers/png/pngmem.c
+++ b/drivers/png/pngmem.c
@@ -1,8 +1,8 @@
/* pngmem.c - stub functions for memory allocation
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.13 [September 27, 2012]
+ * Copyright (c) 1998-2002,2004,2006-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -56,7 +56,7 @@ png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr),
if (malloc_fn != NULL)
{
png_struct dummy_struct;
- memset(&dummy_struct, 0, sizeof dummy_struct);
+ png_memset(&dummy_struct, 0, sizeof dummy_struct);
dummy_struct.mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size);
}
@@ -90,7 +90,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
if (free_fn != NULL)
{
png_struct dummy_struct;
- memset(&dummy_struct, 0, sizeof dummy_struct);
+ png_memset(&dummy_struct, 0, sizeof dummy_struct);
dummy_struct.mem_ptr=mem_ptr;
(*(free_fn))(&dummy_struct, struct_ptr);
return;
@@ -102,7 +102,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
}
/* Allocate memory. For reasonable files, size should never exceed
- * 64K. However, zlib may allocate more then 64K if you don't tell
+ * 64K. However, zlib may allocate more than 64K if you don't tell
* it not to. See zconf.h and png.h for more information. zlib does
* need to allocate exactly 64K, so whatever you call here must
* have the ability to do that.
@@ -475,7 +475,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn,
}
/* Allocate memory. For reasonable files, size should never exceed
- * 64K. However, zlib may allocate more then 64K if you don't tell
+ * 64K. However, zlib may allocate more than 64K if you don't tell
* it not to. See zconf.h and png.h for more information. zlib does
* need to allocate exactly 64K, so whatever you call here must
* have the ability to do that.
diff --git a/drivers/png/pngpread.c b/drivers/png/pngpread.c
index 20d3f236e1..9cf987d7e3 100644
--- a/drivers/png/pngpread.c
+++ b/drivers/png/pngpread.c
@@ -1,8 +1,8 @@
/* pngpread.c - read a png file in push mode
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.23 [July 23, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -19,7 +19,6 @@
#define PNG_READ_SIG_MODE 0
#define PNG_READ_CHUNK_MODE 1
#define PNG_READ_IDAT_MODE 2
-#define PNG_SKIP_MODE 3
#define PNG_READ_tEXt_MODE 4
#define PNG_READ_zTXt_MODE 5
#define PNG_READ_DONE_MODE 6
@@ -49,7 +48,7 @@ png_process_data_pause(png_structp png_ptr, int save)
/* It's easiest for the caller if we do the save, then the caller doesn't
* have to supply the same data again:
*/
- if (save)
+ if (save != 0)
png_push_save_buffer(png_ptr);
else
{
@@ -71,32 +70,15 @@ png_process_data_pause(png_structp png_ptr, int save)
png_uint_32 PNGAPI
png_process_data_skip(png_structp png_ptr)
{
- png_uint_32 remaining = 0;
-
- if (png_ptr != NULL && png_ptr->process_mode == PNG_SKIP_MODE &&
- png_ptr->skip_length > 0)
- {
- /* At the end of png_process_data the buffer size must be 0 (see the loop
- * above) so we can detect a broken call here:
- */
- if (png_ptr->buffer_size != 0)
- png_error(png_ptr,
- "png_process_data_skip called inside png_process_data");
-
- /* If is impossible for there to be a saved buffer at this point -
- * otherwise we could not be in SKIP mode. This will also happen if
- * png_process_skip is called inside png_process_data (but only very
- * rarely.)
- */
- if (png_ptr->save_buffer_size != 0)
- png_error(png_ptr, "png_process_data_skip called with saved data");
-
- remaining = png_ptr->skip_length;
- png_ptr->skip_length = 0;
- png_ptr->process_mode = PNG_READ_CHUNK_MODE;
- }
-
- return remaining;
+ /* TODO: Deprecate and remove this API.
+ * Somewhere the implementation of this seems to have been lost,
+ * or abandoned. It was only to support some internal back-door access
+ * to png_struct) in libpng-1.4.x.
+ */
+ png_warning(png_ptr,
+ "png_process_data_skip is not implemented in any current version"
+ " of libpng");
+ return 0;
}
/* What we do with the incoming data depends on what we were previously
@@ -128,36 +110,6 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
break;
}
-#ifdef PNG_READ_tEXt_SUPPORTED
- case PNG_READ_tEXt_MODE:
- {
- png_push_read_tEXt(png_ptr, info_ptr);
- break;
- }
-
-#endif
-#ifdef PNG_READ_zTXt_SUPPORTED
- case PNG_READ_zTXt_MODE:
- {
- png_push_read_zTXt(png_ptr, info_ptr);
- break;
- }
-
-#endif
-#ifdef PNG_READ_iTXt_SUPPORTED
- case PNG_READ_iTXt_MODE:
- {
- png_push_read_iTXt(png_ptr, info_ptr);
- break;
- }
-
-#endif
- case PNG_SKIP_MODE:
- {
- png_push_crc_finish(png_ptr);
- break;
- }
-
default:
{
png_ptr->buffer_size = 0;
@@ -175,8 +127,8 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
void /* PRIVATE */
png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
{
- png_size_t num_checked = png_ptr->sig_bytes,
- num_to_check = 8 - num_checked;
+ png_size_t num_checked = png_ptr->sig_bytes, /* SAFE, does not exceed 8 */
+ num_to_check = 8 - num_checked;
if (png_ptr->buffer_size < num_to_check)
{
@@ -196,6 +148,7 @@ png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
else
png_error(png_ptr, "PNG file corrupted by ASCII conversion");
}
+
else
{
if (png_ptr->sig_bytes >= 8)
@@ -305,8 +258,8 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_error(png_ptr, "Missing PLTE before IDAT");
}
}
-
#endif
+
else if (chunk_name == png_PLTE)
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
@@ -543,7 +496,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
return;
}
- png_push_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length);
+ png_handle_tEXt(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
@@ -556,7 +509,7 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
return;
}
- png_push_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length);
+ png_handle_zTXt(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
@@ -569,10 +522,11 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
return;
}
- png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
+ png_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
+
else
{
if (png_ptr->push_length + 4 > png_ptr->buffer_size)
@@ -580,80 +534,12 @@ png_push_read_chunk(png_structp png_ptr, png_infop info_ptr)
png_push_save_buffer(png_ptr);
return;
}
- png_push_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
+ png_handle_unknown(png_ptr, info_ptr, png_ptr->push_length);
}
png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
}
-void /* PRIVATE */
-png_push_crc_skip(png_structp png_ptr, png_uint_32 skip)
-{
- png_ptr->process_mode = PNG_SKIP_MODE;
- png_ptr->skip_length = skip;
-}
-
-void /* PRIVATE */
-png_push_crc_finish(png_structp png_ptr)
-{
- if (png_ptr->skip_length && png_ptr->save_buffer_size)
- {
- png_size_t save_size = png_ptr->save_buffer_size;
- png_uint_32 skip_length = png_ptr->skip_length;
-
- /* We want the smaller of 'skip_length' and 'save_buffer_size', but
- * they are of different types and we don't know which variable has the
- * fewest bits. Carefully select the smaller and cast it to the type of
- * the larger - this cannot overflow. Do not cast in the following test
- * - it will break on either 16 or 64 bit platforms.
- */
- if (skip_length < save_size)
- save_size = (png_size_t)skip_length;
-
- else
- skip_length = (png_uint_32)save_size;
-
- png_calculate_crc(png_ptr, png_ptr->save_buffer_ptr, save_size);
-
- png_ptr->skip_length -= skip_length;
- png_ptr->buffer_size -= save_size;
- png_ptr->save_buffer_size -= save_size;
- png_ptr->save_buffer_ptr += save_size;
- }
- if (png_ptr->skip_length && png_ptr->current_buffer_size)
- {
- png_size_t save_size = png_ptr->current_buffer_size;
- png_uint_32 skip_length = png_ptr->skip_length;
-
- /* We want the smaller of 'skip_length' and 'current_buffer_size', here,
- * the same problem exists as above and the same solution.
- */
- if (skip_length < save_size)
- save_size = (png_size_t)skip_length;
-
- else
- skip_length = (png_uint_32)save_size;
-
- png_calculate_crc(png_ptr, png_ptr->current_buffer_ptr, save_size);
-
- png_ptr->skip_length -= skip_length;
- png_ptr->buffer_size -= save_size;
- png_ptr->current_buffer_size -= save_size;
- png_ptr->current_buffer_ptr += save_size;
- }
- if (!png_ptr->skip_length)
- {
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_crc_finish(png_ptr, 0);
- png_ptr->process_mode = PNG_READ_CHUNK_MODE;
- }
-}
-
void PNGCBAPI
png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
{
@@ -663,6 +549,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
return;
ptr = buffer;
+
if (png_ptr->save_buffer_size)
{
png_size_t save_size;
@@ -680,6 +567,7 @@ png_push_fill_buffer(png_structp png_ptr, png_bytep buffer, png_size_t length)
png_ptr->save_buffer_size -= save_size;
png_ptr->save_buffer_ptr += save_size;
}
+
if (length && png_ptr->current_buffer_size)
{
png_size_t save_size;
@@ -709,6 +597,7 @@ png_push_save_buffer(png_structp png_ptr)
png_bytep dp;
istop = png_ptr->save_buffer_size;
+
for (i = 0, sp = png_ptr->save_buffer_ptr, dp = png_ptr->save_buffer;
i < istop; i++, sp++, dp++)
{
@@ -716,6 +605,7 @@ png_push_save_buffer(png_structp png_ptr)
}
}
}
+
if (png_ptr->save_buffer_size + png_ptr->current_buffer_size >
png_ptr->save_buffer_max)
{
@@ -730,8 +620,7 @@ png_push_save_buffer(png_structp png_ptr)
new_max = png_ptr->save_buffer_size + png_ptr->current_buffer_size + 256;
old_buffer = png_ptr->save_buffer;
- png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr,
- (png_size_t)new_max);
+ png_ptr->save_buffer = (png_bytep)png_malloc_warn(png_ptr, new_max);
if (png_ptr->save_buffer == NULL)
{
@@ -743,6 +632,7 @@ png_push_save_buffer(png_structp png_ptr)
png_free(png_ptr, old_buffer);
png_ptr->save_buffer_max = new_max;
}
+
if (png_ptr->current_buffer_size)
{
png_memcpy(png_ptr->save_buffer + png_ptr->save_buffer_size,
@@ -750,6 +640,7 @@ png_push_save_buffer(png_structp png_ptr)
png_ptr->save_buffer_size += png_ptr->current_buffer_size;
png_ptr->current_buffer_size = 0;
}
+
png_ptr->save_buffer_ptr = png_ptr->save_buffer;
png_ptr->buffer_size = 0;
}
@@ -851,6 +742,7 @@ png_push_read_IDAT(png_structp png_ptr)
png_ptr->current_buffer_size -= save_size;
png_ptr->current_buffer_ptr += save_size;
}
+
if (!png_ptr->idat_size)
{
if (png_ptr->buffer_size < 4)
@@ -911,6 +803,12 @@ png_process_IDAT_data(png_structp png_ptr, png_bytep buffer,
*/
ret = inflate(&png_ptr->zstream, Z_SYNC_FLUSH);
+ /* Hack, added in 1.5.18: the progressive reader does not reset
+ * png_ptr->zstream, so any attempt to use it after the last IDAT fails
+ * (silently). This allows the read code to do the reset when required.
+ */
+ png_ptr->flags |= PNG_FLAG_ZSTREAM_PROGRESSIVE;
+
/* Check for any failure before proceeding. */
if (ret != Z_OK && ret != Z_STREAM_END)
{
@@ -1201,6 +1099,7 @@ png_push_process_row(png_structp png_ptr)
void /* PRIVATE */
png_read_push_finish_row(png_structp png_ptr)
{
+#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
@@ -1219,6 +1118,7 @@ png_read_push_finish_row(png_structp png_ptr)
* it, uncomment it here and in png.h
static PNG_CONST png_byte FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1};
*/
+#endif
png_ptr->row_number++;
if (png_ptr->row_number < png_ptr->num_rows)
@@ -1262,525 +1162,6 @@ png_read_push_finish_row(png_structp png_ptr)
#endif /* PNG_READ_INTERLACING_SUPPORTED */
}
-#ifdef PNG_READ_tEXt_SUPPORTED
-void /* PRIVATE */
-png_push_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- png_error(png_ptr, "Out of place tEXt");
- /* NOT REACHED */
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- png_ptr->skip_length = 0; /* This may not be necessary */
-
- if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
- {
- png_warning(png_ptr, "tEXt chunk too large to fit in memory");
- png_ptr->skip_length = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
- png_ptr->current_text[length] = '\0';
- png_ptr->current_text_ptr = png_ptr->current_text;
- png_ptr->current_text_size = (png_size_t)length;
- png_ptr->current_text_left = (png_size_t)length;
- png_ptr->process_mode = PNG_READ_tEXt_MODE;
-}
-
-void /* PRIVATE */
-png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr->buffer_size && png_ptr->current_text_left)
- {
- png_size_t text_size;
-
- if (png_ptr->buffer_size < png_ptr->current_text_left)
- text_size = png_ptr->buffer_size;
-
- else
- text_size = png_ptr->current_text_left;
-
- png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
- png_ptr->current_text_left -= text_size;
- png_ptr->current_text_ptr += text_size;
- }
- if (!(png_ptr->current_text_left))
- {
- png_textp text_ptr;
- png_charp text;
- png_charp key;
- int ret;
-
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_crc_finish(png_ptr);
-
-#ifdef PNG_MAX_MALLOC_64K
- if (png_ptr->skip_length)
- return;
-#endif
-
- key = png_ptr->current_text;
-
- for (text = key; *text; text++)
- /* Empty loop */ ;
-
- if (text < key + png_ptr->current_text_size)
- text++;
-
- text_ptr = (png_textp)png_malloc(png_ptr, png_sizeof(png_text));
- text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
- text_ptr->key = key;
- text_ptr->itxt_length = 0;
- text_ptr->lang = NULL;
- text_ptr->lang_key = NULL;
- text_ptr->text = text;
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_free(png_ptr, key);
- png_free(png_ptr, text_ptr);
- png_ptr->current_text = NULL;
-
- if (ret)
- png_warning(png_ptr, "Insufficient memory to store text chunk");
- }
-}
-#endif
-
-#ifdef PNG_READ_zTXt_SUPPORTED
-void /* PRIVATE */
-png_push_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- png_error(png_ptr, "Out of place zTXt");
- /* NOT REACHED */
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- /* We can't handle zTXt chunks > 64K, since we don't have enough space
- * to be able to store the uncompressed data. Actually, the threshold
- * is probably around 32K, but it isn't as definite as 64K is.
- */
- if (length > (png_uint_32)65535L)
- {
- png_warning(png_ptr, "zTXt chunk too large to fit in memory");
- png_push_crc_skip(png_ptr, length);
- return;
- }
-#endif
-
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
- png_ptr->current_text[length] = '\0';
- png_ptr->current_text_ptr = png_ptr->current_text;
- png_ptr->current_text_size = (png_size_t)length;
- png_ptr->current_text_left = (png_size_t)length;
- png_ptr->process_mode = PNG_READ_zTXt_MODE;
-}
-
-void /* PRIVATE */
-png_push_read_zTXt(png_structp png_ptr, png_infop info_ptr)
-{
- if (png_ptr->buffer_size && png_ptr->current_text_left)
- {
- png_size_t text_size;
-
- if (png_ptr->buffer_size < (png_uint_32)png_ptr->current_text_left)
- text_size = png_ptr->buffer_size;
-
- else
- text_size = png_ptr->current_text_left;
-
- png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
- png_ptr->current_text_left -= text_size;
- png_ptr->current_text_ptr += text_size;
- }
- if (!(png_ptr->current_text_left))
- {
- png_textp text_ptr;
- png_charp text;
- png_charp key;
- int ret;
- png_size_t text_size, key_size;
-
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_crc_finish(png_ptr);
-
- key = png_ptr->current_text;
-
- for (text = key; *text; text++)
- /* Empty loop */ ;
-
- /* zTXt can't have zero text */
- if (text >= key + png_ptr->current_text_size)
- {
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- return;
- }
-
- text++;
-
- if (*text != PNG_TEXT_COMPRESSION_zTXt) /* Check compression byte */
- {
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- return;
- }
-
- text++;
-
- png_ptr->zstream.next_in = (png_bytep)text;
- png_ptr->zstream.avail_in = (uInt)(png_ptr->current_text_size -
- (text - key));
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
-
- key_size = text - key;
- text_size = 0;
- text = NULL;
- ret = Z_STREAM_END;
-
- while (png_ptr->zstream.avail_in)
- {
- ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
- if (ret != Z_OK && ret != Z_STREAM_END)
- {
- inflateReset(&png_ptr->zstream);
- png_ptr->zstream.avail_in = 0;
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- png_free(png_ptr, text);
- return;
- }
-
- if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END)
- {
- if (text == NULL)
- {
- text = (png_charp)png_malloc(png_ptr,
- (png_ptr->zbuf_size
- - png_ptr->zstream.avail_out + key_size + 1));
-
- png_memcpy(text + key_size, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
-
- png_memcpy(text, key, key_size);
-
- text_size = key_size + png_ptr->zbuf_size -
- png_ptr->zstream.avail_out;
-
- *(text + text_size) = '\0';
- }
-
- else
- {
- png_charp tmp;
-
- tmp = text;
- text = (png_charp)png_malloc(png_ptr, text_size +
- (png_ptr->zbuf_size
- - png_ptr->zstream.avail_out + 1));
-
- png_memcpy(text, tmp, text_size);
- png_free(png_ptr, tmp);
-
- png_memcpy(text + text_size, png_ptr->zbuf,
- png_ptr->zbuf_size - png_ptr->zstream.avail_out);
-
- text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
- *(text + text_size) = '\0';
- }
-
- if (ret != Z_STREAM_END)
- {
- png_ptr->zstream.next_out = png_ptr->zbuf;
- png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
- }
- }
- else
- {
- break;
- }
-
- if (ret == Z_STREAM_END)
- break;
- }
-
- inflateReset(&png_ptr->zstream);
- png_ptr->zstream.avail_in = 0;
-
- if (ret != Z_STREAM_END)
- {
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- png_free(png_ptr, text);
- return;
- }
-
- png_ptr->current_text = NULL;
- png_free(png_ptr, key);
- key = text;
- text += key_size;
-
- text_ptr = (png_textp)png_malloc(png_ptr,
- png_sizeof(png_text));
- text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
- text_ptr->key = key;
- text_ptr->itxt_length = 0;
- text_ptr->lang = NULL;
- text_ptr->lang_key = NULL;
- text_ptr->text = text;
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_free(png_ptr, key);
- png_free(png_ptr, text_ptr);
-
- if (ret)
- png_warning(png_ptr, "Insufficient memory to store text chunk");
- }
-}
-#endif
-
-#ifdef PNG_READ_iTXt_SUPPORTED
-void /* PRIVATE */
-png_push_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- if (!(png_ptr->mode & PNG_HAVE_IHDR) || (png_ptr->mode & PNG_HAVE_IEND))
- {
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- png_error(png_ptr, "Out of place iTXt");
- /* NOT REACHED */
- }
-
-#ifdef PNG_MAX_MALLOC_64K
- png_ptr->skip_length = 0; /* This may not be necessary */
-
- if (length > (png_uint_32)65535L) /* Can't hold entire string in memory */
- {
- png_warning(png_ptr, "iTXt chunk too large to fit in memory");
- png_ptr->skip_length = length - (png_uint_32)65535L;
- length = (png_uint_32)65535L;
- }
-#endif
-
- png_ptr->current_text = (png_charp)png_malloc(png_ptr,
- (png_size_t)(length + 1));
- png_ptr->current_text[length] = '\0';
- png_ptr->current_text_ptr = png_ptr->current_text;
- png_ptr->current_text_size = (png_size_t)length;
- png_ptr->current_text_left = (png_size_t)length;
- png_ptr->process_mode = PNG_READ_iTXt_MODE;
-}
-
-void /* PRIVATE */
-png_push_read_iTXt(png_structp png_ptr, png_infop info_ptr)
-{
-
- if (png_ptr->buffer_size && png_ptr->current_text_left)
- {
- png_size_t text_size;
-
- if (png_ptr->buffer_size < png_ptr->current_text_left)
- text_size = png_ptr->buffer_size;
-
- else
- text_size = png_ptr->current_text_left;
-
- png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
- png_ptr->current_text_left -= text_size;
- png_ptr->current_text_ptr += text_size;
- }
-
- if (!(png_ptr->current_text_left))
- {
- png_textp text_ptr;
- png_charp key;
- int comp_flag;
- png_charp lang;
- png_charp lang_key;
- png_charp text;
- int ret;
-
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_push_crc_finish(png_ptr);
-
-#ifdef PNG_MAX_MALLOC_64K
- if (png_ptr->skip_length)
- return;
-#endif
-
- key = png_ptr->current_text;
-
- for (lang = key; *lang; lang++)
- /* Empty loop */ ;
-
- if (lang < key + png_ptr->current_text_size - 3)
- lang++;
-
- comp_flag = *lang++;
- lang++; /* Skip comp_type, always zero */
-
- for (lang_key = lang; *lang_key; lang_key++)
- /* Empty loop */ ;
-
- lang_key++; /* Skip NUL separator */
-
- text=lang_key;
-
- if (lang_key < key + png_ptr->current_text_size - 1)
- {
- for (; *text; text++)
- /* Empty loop */ ;
- }
-
- if (text < key + png_ptr->current_text_size)
- text++;
-
- text_ptr = (png_textp)png_malloc(png_ptr,
- png_sizeof(png_text));
-
- text_ptr->compression = comp_flag + 2;
- text_ptr->key = key;
- text_ptr->lang = lang;
- text_ptr->lang_key = lang_key;
- text_ptr->text = text;
- text_ptr->text_length = 0;
- text_ptr->itxt_length = png_strlen(text);
-
- ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
-
- png_ptr->current_text = NULL;
-
- png_free(png_ptr, text_ptr);
- if (ret)
- png_warning(png_ptr, "Insufficient memory to store iTXt chunk");
- }
-}
-#endif
-
-/* This function is called when we haven't found a handler for this
- * chunk. If there isn't a problem with the chunk itself (ie a bad chunk
- * name or a critical chunk), the chunk is (currently) silently ignored.
- */
-void /* PRIVATE */
-png_push_handle_unknown(png_structp png_ptr, png_infop info_ptr, png_uint_32
- length)
-{
- png_uint_32 skip = 0;
- png_uint_32 chunk_name = png_ptr->chunk_name;
-
- if (PNG_CHUNK_CRITICAL(chunk_name))
- {
-#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- && png_ptr->read_user_chunk_fn == NULL
-#endif
- )
-#endif
- png_chunk_error(png_ptr, "unknown critical chunk");
-
- PNG_UNUSED(info_ptr) /* To quiet some compiler warnings */
- }
-
-#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- /* TODO: the code below is apparently just using the
- * png_struct::unknown_chunk member as a temporarily variable, it should be
- * possible to eliminate both it and the temporary buffer.
- */
- if (png_ptr->flags & PNG_FLAG_KEEP_UNKNOWN_CHUNKS)
- {
-#ifdef PNG_MAX_MALLOC_64K
- if (length > 65535)
- {
- png_warning(png_ptr, "unknown chunk too large to fit in memory");
- skip = length - 65535;
- length = 65535;
- }
-#endif
- /* This is just a record for the user; libpng doesn't use the character
- * form of the name.
- */
- PNG_CSTRING_FROM_CHUNK(png_ptr->unknown_chunk.name, png_ptr->chunk_name);
-
- /* The following cast should be safe because of the check above. */
- png_ptr->unknown_chunk.size = (png_size_t)length;
-
- if (length == 0)
- png_ptr->unknown_chunk.data = NULL;
-
- else
- {
- png_ptr->unknown_chunk.data = (png_bytep)png_malloc(png_ptr,
- png_ptr->unknown_chunk.size);
- png_crc_read(png_ptr, (png_bytep)png_ptr->unknown_chunk.data,
- png_ptr->unknown_chunk.size);
- }
-
-#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
- if (png_ptr->read_user_chunk_fn != NULL)
- {
- /* Callback to user unknown chunk handler */
- int ret;
- ret = (*(png_ptr->read_user_chunk_fn))
- (png_ptr, &png_ptr->unknown_chunk);
-
- if (ret < 0)
- png_chunk_error(png_ptr, "error in user chunk");
-
- if (ret == 0)
- {
- if (PNG_CHUNK_CRITICAL(png_ptr->chunk_name))
- if (png_chunk_unknown_handling(png_ptr, chunk_name) !=
- PNG_HANDLE_CHUNK_ALWAYS)
- png_chunk_error(png_ptr, "unknown critical chunk");
- png_set_unknown_chunks(png_ptr, info_ptr,
- &png_ptr->unknown_chunk, 1);
- }
- }
-
- else
-#endif
- png_set_unknown_chunks(png_ptr, info_ptr, &png_ptr->unknown_chunk, 1);
- png_free(png_ptr, png_ptr->unknown_chunk.data);
- png_ptr->unknown_chunk.data = NULL;
- }
-
- else
-#endif
- skip=length;
- png_push_crc_skip(png_ptr, skip);
-}
-
void /* PRIVATE */
png_push_have_info(png_structp png_ptr, png_infop info_ptr)
{
@@ -1816,7 +1197,7 @@ png_progressive_combine_row (png_structp png_ptr, png_bytep old_row,
* it must be png_ptr->row_buf+1
*/
if (new_row != NULL)
- png_combine_row(png_ptr, old_row, 1/*display*/);
+ png_combine_row(png_ptr, old_row, 1/*blocky display*/);
}
#endif /* PNG_READ_INTERLACING_SUPPORTED */
diff --git a/drivers/png/pngpriv.h b/drivers/png/pngpriv.h
index 56532f4eeb..8bdccccafb 100644
--- a/drivers/png/pngpriv.h
+++ b/drivers/png/pngpriv.h
@@ -1,13 +1,11 @@
/* pngpriv.h - private declarations for use inside libpng
*
- * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.26 [December 17, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- *
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
@@ -39,6 +37,7 @@
*/
#define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
+#ifndef PNG_VERSION_INFO_ONLY
/* This is required for the definition of abort(), used as a last ditch
* error handler when all else fails.
*/
@@ -46,6 +45,7 @@
/* This is used to find 'offsetof', used below for alignment tests. */
#include <stddef.h>
+#endif /* !PNG_VERSION_INFO_ONLY */
#define PNGLIB_BUILD /*libpng is being built, not used*/
@@ -125,21 +125,68 @@
#endif
#include "png.h"
-#include "pnginfo.h"
-#include "pngstruct.h"
/* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */
#ifndef PNG_DLL_EXPORT
# define PNG_DLL_EXPORT
#endif
-/* This is used for 16 bit gamma tables - only the top level pointers are const,
- * this could be changed:
+/* Compile time options.
+ * =====================
+ * In a multi-arch build the compiler may compile the code several times for the
+ * same object module, producing different binaries for different architectures.
+ * When this happens configure-time setting of the target host options cannot be
+ * done and this interferes with the handling of the ARM NEON optimizations, and
+ * possibly other similar optimizations. Put additional tests here; in general
+ * this is needed when the same option can be changed at both compile time and
+ * run time depending on the target OS (i.e. iOS vs Android.)
+ *
+ * NOTE: symbol prefixing does not pass $(CFLAGS) to the preprocessor, because
+ * this is not possible with certain compilers (Oracle SUN OS CC), as a result
+ * it is necessary to ensure that all extern functions that *might* be used
+ * regardless of $(CFLAGS) get declared in this file. The test on __ARM_NEON__
+ * below is one example of this behavior because it is controlled by the
+ * presence or not of -mfpu=neon on the GCC command line, it is possible to do
+ * this in $(CC), e.g. "CC=gcc -mfpu=neon", but people who build libpng rarely
+ * do this.
*/
-typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
+#ifndef PNG_ARM_NEON_OPT
+ /* ARM NEON optimizations are being controlled by the compiler settings,
+ * typically the target FPU. If the FPU has been set to NEON (-mfpu=neon
+ * with GCC) then the compiler will define __ARM_NEON__ and we can rely
+ * unconditionally on NEON instructions not crashing, otherwise we must
+ * disable use of NEON instructions.
+ *
+ * NOTE: at present these optimizations depend on 'ALIGNED_MEMORY', so they
+ * can only be turned on automatically if that is supported too. If
+ * PNG_ARM_NEON_OPT is set in CPPFLAGS (to >0) then arm/arm_init.c will fail
+ * to compile with an appropriate #error if ALIGNED_MEMORY has been turned
+ * off.
+ */
+# if defined(__ARM_NEON__) && defined(PNG_ALIGNED_MEMORY_SUPPORTED)
+# define PNG_ARM_NEON_OPT 2
+# else
+# define PNG_ARM_NEON_OPT 0
+# endif
+#endif
-/* Added at libpng-1.2.9 */
-/* Moved to pngpriv.h at libpng-1.5.0 */
+
+#if PNG_ARM_NEON_OPT > 0
+ /* NEON optimizations are to be at least considered by libpng, so enable the
+ * callbacks to do this.
+ */
+# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon
+#endif
+
+/* SECURITY and SAFETY:
+ *
+ * By default libpng is built without any internal limits on image size,
+ * individual heap (png_malloc) allocations or the total amount of memory used.
+ * If PNG_SAFE_LIMITS_SUPPORTED is defined, however, the limits below are used
+ * (unless individually overridden). These limits are believed to be fairly
+ * safe, but builders of secure systems should verify the values against the
+ * real system capabilities.
+ */
/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
* script. We may need it here to get the correct configuration on things
@@ -151,9 +198,11 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# endif
#endif
-/* Moved to pngpriv.h at libpng-1.5.0 */
-/* NOTE: some of these may have been used in external applications as
- * these definitions were exposed in pngconf.h prior to 1.5.
+/* SECURITY and SAFETY:
+ *
+ * libpng is built with support for internal limits on image dimensions and
+ * memory usage. These are documented in scripts/pnglibconf.dfa of the
+ * source and recorded in the machine generated header file pnglibconf.h.
*/
/* If you are running on a machine where you cannot allocate more
@@ -171,6 +220,11 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define PNG_MAX_MALLOC_64K
#endif
+/* Moved to pngpriv.h at libpng-1.5.0 */
+/* NOTE: some of these may have been used in external applications as
+ * these definitions were exposed in pngconf.h prior to 1.5.
+ */
+
#ifndef PNG_UNUSED
/* Unused formal parameter warnings are silenced using the following macro
* which is expected to have no bad effects on performance (optimizing
@@ -206,7 +260,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
/* Modern compilers support restrict, but assume not for anything not
* recognized here:
*/
-# if defined __GNUC__ || defined _MSC_VER || defined __WATCOMC__
+# if defined(__GNUC__) || defined(_MSC_VER) || defined(__WATCOMC__)
# define PNG_RESTRICT restrict
# else
# define PNG_RESTRICT
@@ -220,8 +274,6 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#ifdef PNG_WARNINGS_SUPPORTED
# define PNG_WARNING_PARAMETERS(p) png_warning_parameters p;
#else
-# define png_warning(s1,s2) ((void)(s1))
-# define png_chunk_warning(s1,s2) ((void)(s1))
# define png_warning_parameter(p,number,string) ((void)0)
# define png_warning_parameter_unsigned(p,number,format,value) ((void)0)
# define png_warning_parameter_signed(p,number,format,value) ((void)0)
@@ -229,8 +281,6 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define PNG_WARNING_PARAMETERS(p)
#endif
#ifndef PNG_ERROR_TEXT_SUPPORTED
-# define png_error(s1,s2) png_err(s1)
-# define png_chunk_error(s1,s2) png_err(s1)
# define png_fixed_error(s1,s2) png_err(s1)
#endif
@@ -268,6 +318,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# define PNGFAPI /* PRIVATE */
#endif
+#ifndef PNG_VERSION_INFO_ONLY
/* Other defines specific to compilers can go here. Try to keep
* them inside an appropriate ifdef/endif pair for portability.
*/
@@ -312,6 +363,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
defined(_WIN32) || defined(__WIN32__)
# include <windows.h> /* defines _WINDOWS_ macro */
#endif
+#endif /* !PNG_VERSION_INFO_ONLY */
/* Moved here around 1.5.0beta36 from pngconf.h */
/* Users may want to use these so they are not private. Any library
@@ -341,13 +393,9 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
# ifdef _WINDOWS_ /* Favor Windows over C runtime fns */
# define CVT_PTR(ptr) (ptr)
# define CVT_PTR_NOCHECK(ptr) (ptr)
-# ifdef WINRT_ENABLED
-# define png_strlen strlen
-# else
-# define png_strlen lstrlenA
-# endif
+# define png_strlen lstrlenA
# define png_memcmp memcmp
-# define png_memcpy CopyMemory
+# define png_memcpy memcpy
# define png_memset memset
# else
# define CVT_PTR(ptr) (ptr)
@@ -380,7 +428,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE
/* This is used because in some compiler implementations non-aligned
* structure members are supported, so the offsetof approach below fails.
- * Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access
+ * Set PNG_ALIGN_SIZE=0 for compiler combinations where unaligned access
* is good for performance. Do not do this unless you have tested the result
* and understand it.
*/
@@ -430,6 +478,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#define PNG_BACKGROUND_IS_GRAY 0x800
#define PNG_HAVE_PNG_SIGNATURE 0x1000
#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */
+#define PNG_HAVE_iCCP 0x4000
/* Flags for the transformations the PNG library does on the image data */
#define PNG_BGR 0x0001
@@ -468,10 +517,6 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#define PNG_STRUCT_PNG 0x0001
#define PNG_STRUCT_INFO 0x0002
-/* Scaling factor for filter heuristic weighting calculations */
-#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT))
-#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
-
/* Flags for the png_ptr->flags rather than declaring a byte for each one */
#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001
#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002
@@ -494,7 +539,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000
#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000
#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000
- /* 0x200000 unused */
+#define PNG_FLAG_ZSTREAM_PROGRESSIVE 0x200000
/* 0x400000 unused */
#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */
#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */
@@ -580,8 +625,10 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\
((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0))
#else
+#ifndef PNG_VERSION_INFO_ONLY
PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
png_const_charp text));
+#endif /* !PNG_VERSION_INFO_ONLY */
#endif
#endif
@@ -655,6 +702,18 @@ PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
#define PNG_GAMMA_MAC_INVERSE 65909
#define PNG_GAMMA_sRGB_INVERSE 45455
+/* Almost everything below is C specific; the #defines above can be used in
+ * non-C code (so long as it is C-preprocessed) the rest of this stuff cannot.
+ */
+#ifndef PNG_VERSION_INFO_ONLY
+
+#include "pngstruct.h"
+#include "pnginfo.h"
+
+/* This is used for 16 bit gamma tables -- only the top level pointers are
+ * const; this could be changed:
+ */
+typedef const png_uint_16p * png_const_uint_16pp;
/* Inhibit C++ name-mangling for libpng functions but not for system calls. */
#ifdef __cplusplus
@@ -786,10 +845,8 @@ PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr));
# ifdef PNG_FLOATING_POINT_SUPPORTED
PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma));
# endif
-# ifdef PNG_FIXED_POINT_SUPPORTED
PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr,
png_fixed_point file_gamma));
-# endif
#endif
#ifdef PNG_WRITE_sBIT_SUPPORTED
@@ -844,13 +901,6 @@ PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr,
png_const_uint_16p hist, int num_hist));
#endif
-/* Chunks that have keywords */
-#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
- defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
-PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,
- png_const_charp key, png_charpp new_key));
-#endif
-
#ifdef PNG_WRITE_tEXt_SUPPORTED
PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key,
png_const_charp text, png_size_t text_len));
@@ -956,8 +1006,8 @@ PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
/* Unfilter a row: check the filter value before calling this, there is no point
* calling it for PNG_FILTER_VALUE_NONE.
*/
-PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop row_info,
- png_bytep row, png_const_bytep prev_row, int filter));
+PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop
+ row_info, png_bytep row, png_const_bytep prev_row, int filter));
PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info,
png_bytep row, png_const_bytep prev_row));
@@ -1222,10 +1272,8 @@ PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
png_uint_32 length));
#endif
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 length));
-#endif
PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
png_uint_32 chunk_name));
@@ -1258,9 +1306,6 @@ PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr,
PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr,
png_infop info_ptr));
PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr));
-PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr,
- png_uint_32 length));
-PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr));
PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr,
png_bytep buffer, png_size_t buffer_length));
@@ -1359,6 +1404,13 @@ PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr,
int color_type, int interlace_type, int compression_type,
int filter_type));
+/* Added at libpng version 1.5.10 */
+#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \
+ defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
+PNG_EXTERN void png_do_check_palette_indexes PNGARG((png_structp png_ptr,
+ png_row_infop row_info));
+#endif
+
/* Free all memory used by the read (old method - NOT DLL EXPORTED) */
PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr,
png_infop info_ptr, png_infop end_info_ptr));
@@ -1449,14 +1501,16 @@ PNG_EXTERN void png_formatted_warning(png_structp png_ptr,
/* ASCII to FP interfaces, currently only implemented if sCAL
* support is required.
*/
-#if defined(PNG_READ_sCAL_SUPPORTED)
+#ifdef PNG_sCAL_SUPPORTED
/* MAX_DIGITS is actually the maximum number of characters in an sCAL
* width or height, derived from the precision (number of significant
* digits - a build time settable option) and assumpitions about the
* maximum ridiculous exponent.
*/
#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/)
+#endif
+#ifdef PNG_sCAL_SUPPORTED
#ifdef PNG_FLOATING_POINT_SUPPORTED
PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii,
png_size_t size, double fp, unsigned int precision));
@@ -1540,15 +1594,15 @@ PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr,
#define PNG_FP_IS_ZERO(state) (((state) & PNG_FP_Z_MASK) == PNG_FP_SAW_DIGIT)
#define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK)
#define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK)
-
-/* The actual parser. This can be called repeatedly, it updates
+
+/* The actual parser. This can be called repeatedly. It updates
* the index into the string and the state variable (which must
- * be initialzed to 0). It returns a result code, as above. There
+ * be initialized to 0). It returns a result code, as above. There
* is no point calling the parser any more if it fails to advance to
* the end of the string - it is stuck on an invalid character (or
* terminated by '\0').
*
- * Note that the pointer will consume an E or even an E+ then leave
+ * Note that the pointer will consume an E or even an E+ and then leave
* a 'maybe' state even though a preceding integer.fraction is valid.
* The PNG_FP_WAS_VALID flag indicates that a preceding substring was
* a valid number. It's possible to recover from this by calling
@@ -1587,7 +1641,7 @@ PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr,
png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by));
#endif
-#ifdef PNG_READ_GAMMA_SUPPORTED
+#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED)
/* Calculate a reciprocal - used for gamma values. This returns
* 0 if the argument is 0 in order to maintain an undefined value,
* there are no warnings.
@@ -1622,7 +1676,80 @@ PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
int bit_depth));
#endif
-/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */
+/* Missing declarations if FIXED_POINT is *not* supported - fixed properly
+ * in libpng 1.6
+ */
+#ifndef PNG_FIXED_POINT_SUPPORTED
+#ifdef PNG_cHRM_SUPPORTED
+PNG_EXTERN png_uint_32 png_get_cHRM_XYZ_fixed PNGARG(
+ (png_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *int_red_X, png_fixed_point *int_red_Y,
+ png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
+ png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
+ png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
+ png_fixed_point *int_blue_Z));
+PNG_EXTERN void png_set_cHRM_XYZ_fixed PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y,
+ png_fixed_point int_red_Z, png_fixed_point int_green_X,
+ png_fixed_point int_green_Y, png_fixed_point int_green_Z,
+ png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
+ png_fixed_point int_blue_Z));
+PNG_EXTERN void png_set_cHRM_fixed PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_white_x,
+ png_fixed_point int_white_y, png_fixed_point int_red_x,
+ png_fixed_point int_red_y, png_fixed_point int_green_x,
+ png_fixed_point int_green_y, png_fixed_point int_blue_x,
+ png_fixed_point int_blue_y));
+#endif
+
+#ifdef PNG_gAMA_SUPPORTED
+PNG_EXTERN png_uint_32 png_get_gAMA_fixed PNGARG(
+ (png_const_structp png_ptr, png_const_infop info_ptr,
+ png_fixed_point *int_file_gamma));
+PNG_EXTERN void png_set_gAMA_fixed PNGARG((png_structp png_ptr,
+ png_infop info_ptr, png_fixed_point int_file_gamma));
+#endif
+
+#ifdef PNG_READ_BACKGROUND_SUPPORTED
+PNG_EXTERN void png_set_background_fixed PNGARG((png_structp png_ptr,
+ png_const_color_16p background_color, int background_gamma_code,
+ int need_expand, png_fixed_point background_gamma));
+#endif
+
+#ifdef PNG_READ_ALPHA_MODE_SUPPORTED
+PNG_EXTERN void png_set_alpha_mode_fixed PNGARG((png_structp png_ptr,
+ int mode, png_fixed_point output_gamma));
+#endif
+
+#ifdef PNG_READ_GAMMA_SUPPORTED
+PNG_EXTERN void png_set_gamma_fixed PNGARG((png_structp png_ptr,
+ png_fixed_point screen_gamma, png_fixed_point override_file_gamma));
+#endif
+
+#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
+PNG_EXTERN void png_set_rgb_to_gray_fixed PNGARG((png_structp png_ptr,
+ int error_action, png_fixed_point red, png_fixed_point green));
+#endif
+#endif /* FIX MISSING !FIXED_POINT DECLARATIONS */
+
+/* These are initialization functions for hardware specific PNG filter
+ * optimizations; list these here then select the appropriate one at compile
+ * time using the macro PNG_FILTER_OPTIMIZATIONS. If the macro is not defined
+ * the generic code is used.
+ */
+#ifdef PNG_FILTER_OPTIMIZATIONS
+PNG_EXTERN void PNG_FILTER_OPTIMIZATIONS(png_structp png_ptr, unsigned int bpp);
+ /* Just declare the optimization that will be used */
+#else
+ /* List *all* the possible optimizations here - this branch is required if
+ * the builder of libpng passes the definition of PNG_FILTER_OPTIMIZATIONS in
+ * CFLAGS in place of CPPFLAGS *and* uses symbol prefixing.
+ */
+PNG_EXTERN void png_init_filter_functions_neon(png_structp png_ptr,
+ unsigned int bpp);
+#endif
+
+/* Maintainer: Put new private prototypes here ^ */
#include "pngdebug.h"
@@ -1630,4 +1757,5 @@ PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr,
}
#endif
+#endif /* PNG_VERSION_INFO_ONLY */
#endif /* PNGPRIV_H */
diff --git a/drivers/png/pngread.c b/drivers/png/pngread.c
index 0643754dad..b90e017e62 100644
--- a/drivers/png/pngread.c
+++ b/drivers/png/pngread.c
@@ -1,8 +1,8 @@
/* pngread.c - read a PNG file
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.23 [July 23, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -67,15 +67,11 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_ptr->user_width_max = PNG_USER_WIDTH_MAX;
png_ptr->user_height_max = PNG_USER_HEIGHT_MAX;
-# ifdef PNG_USER_CHUNK_CACHE_MAX
/* Added at libpng-1.2.43 and 1.4.0 */
png_ptr->user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
-# endif
-# ifdef PNG_SET_USER_CHUNK_MALLOC_MAX
/* Added at libpng-1.2.43 and 1.4.1 */
png_ptr->user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX;
-# endif
#endif
#ifdef PNG_SETJMP_SUPPORTED
@@ -104,7 +100,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
if (!png_user_version_check(png_ptr, user_png_ver))
png_cleanup_needed = 1;
- if (!png_cleanup_needed)
+ if (png_cleanup_needed == 0)
{
/* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
@@ -118,7 +114,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr;
- if (!png_cleanup_needed)
+ if (png_cleanup_needed == 0)
{
switch (inflateInit(&png_ptr->zstream))
{
@@ -145,7 +141,7 @@ png_create_read_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
}
}
- if (png_cleanup_needed)
+ if (png_cleanup_needed != 0)
{
/* Clean up PNG structure and deallocate any memory. */
png_free(png_ptr, png_ptr->zbuf);
@@ -563,7 +559,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
if (ret == Z_STREAM_END)
{
if (png_ptr->zstream.avail_out || png_ptr->zstream.avail_in ||
- png_ptr->idat_size)
+ png_ptr->idat_size)
png_benign_error(png_ptr, "Extra compressed data");
png_ptr->mode |= PNG_AFTER_IDAT;
png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
@@ -621,7 +617,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
#ifdef PNG_READ_INTERLACING_SUPPORTED
/* Blow up interlaced rows to full size */
if (png_ptr->interlaced &&
- (png_ptr->transformations & PNG_INTERLACE))
+ (png_ptr->transformations & PNG_INTERLACE))
{
if (png_ptr->pass < 6)
png_do_read_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass,
@@ -805,6 +801,13 @@ png_read_end(png_structp png_ptr, png_infop info_ptr)
png_crc_finish(png_ptr, 0); /* Finish off CRC from last IDAT chunk */
+#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
+ /* Report invalid palette index; added at libng-1.5.10 */
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE &&
+ png_ptr->num_palette_max > png_ptr->num_palette)
+ png_benign_error(png_ptr, "Read palette index exceeding num_palette");
+#endif
+
do
{
png_uint_32 length = png_read_chunk_header(png_ptr);
@@ -1070,12 +1073,6 @@ png_read_destroy(png_structp png_ptr, png_infop info_ptr,
png_free(png_ptr, png_ptr->save_buffer);
#endif
-#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-#ifdef PNG_TEXT_SUPPORTED
- png_free(png_ptr, png_ptr->current_text);
-#endif /* PNG_TEXT_SUPPORTED */
-#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
-
/* Save the important info out of the png_struct, in case it is
* being used again.
*/
@@ -1122,9 +1119,8 @@ png_set_read_status_fn(png_structp png_ptr, png_read_status_ptr read_row_fn)
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
#ifdef PNG_INFO_IMAGE_SUPPORTED
void PNGAPI
-png_read_png(png_structp png_ptr, png_infop info_ptr,
- int transforms,
- voidp params)
+png_read_png(png_structp png_ptr, png_infop info_ptr, int transforms,
+ voidp params)
{
int row;
@@ -1194,7 +1190,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
if (transforms & PNG_TRANSFORM_EXPAND)
if ((png_ptr->bit_depth < 8) ||
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
- (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
+ (info_ptr->valid & PNG_INFO_tRNS))
png_set_expand(png_ptr);
#endif
@@ -1213,14 +1209,8 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
* [0,65535] to the original [0,7] or [0,31], or whatever range the
* colors were originally in:
*/
- if ((transforms & PNG_TRANSFORM_SHIFT)
- && png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT))
- {
- png_color_8p sig_bit;
-
- png_get_sBIT(png_ptr, info_ptr, &sig_bit);
- png_set_shift(png_ptr, sig_bit);
- }
+ if ((transforms & PNG_TRANSFORM_SHIFT) && (info_ptr->valid & PNG_INFO_sBIT))
+ png_set_shift(png_ptr, &info_ptr->sig_bit);
#endif
#ifdef PNG_READ_BGR_SUPPORTED
@@ -1290,7 +1280,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
for (row = 0; row < (int)info_ptr->height; row++)
info_ptr->row_pointers[row] = (png_bytep)png_malloc(png_ptr,
- png_get_rowbytes(png_ptr, info_ptr));
+ png_get_rowbytes(png_ptr, info_ptr));
}
png_read_image(png_ptr, info_ptr->row_pointers);
diff --git a/drivers/png/pngrio.c b/drivers/png/pngrio.c
index e9c381c5ba..b4042e9ed3 100644
--- a/drivers/png/pngrio.c
+++ b/drivers/png/pngrio.c
@@ -2,7 +2,7 @@
/* pngrio.c - functions for data input
*
* Last changed in libpng 1.5.0 [January 6, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002,2004,2006-2011 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -26,7 +26,7 @@
* reads from a file pointer. Note that this routine sometimes gets called
* with very small lengths, so you should implement some kind of simple
* buffering if you are using unbuffered reads. This should never be asked
- * to read more then 64K on a 16 bit machine.
+ * to read more than 64K on a 16 bit machine.
*/
void /* PRIVATE */
png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
diff --git a/drivers/png/pngrtran.c b/drivers/png/pngrtran.c
index 1079595f0a..f273362616 100644
--- a/drivers/png/pngrtran.c
+++ b/drivers/png/pngrtran.c
@@ -1,8 +1,8 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.24 [November 12, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -114,7 +114,7 @@ png_set_background_fixed(png_structp png_ptr,
png_sizeof(png_color_16));
png_ptr->background_gamma = background_gamma;
png_ptr->background_gamma_type = (png_byte)(background_gamma_code);
- if (need_expand)
+ if (need_expand != 0)
png_ptr->transformations |= PNG_BACKGROUND_EXPAND;
else
png_ptr->transformations &= ~PNG_BACKGROUND_EXPAND;
@@ -194,8 +194,10 @@ translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma,
*/
# ifdef PNG_READ_sRGB_SUPPORTED
png_ptr->flags |= PNG_FLAG_ASSUME_sRGB;
+# else
+ PNG_UNUSED(png_ptr)
# endif
- if (is_screen)
+ if (is_screen != 0)
output_gamma = PNG_GAMMA_sRGB;
else
output_gamma = PNG_GAMMA_sRGB_INVERSE;
@@ -204,7 +206,7 @@ translate_gamma_flags(png_structp png_ptr, png_fixed_point output_gamma,
else if (output_gamma == PNG_GAMMA_MAC_18 ||
output_gamma == PNG_FP_1 / PNG_GAMMA_MAC_18)
{
- if (is_screen)
+ if (is_screen != 0)
output_gamma = PNG_GAMMA_MAC_OLD;
else
output_gamma = PNG_GAMMA_MAC_INVERSE;
@@ -329,7 +331,7 @@ png_set_alpha_mode_fixed(png_structp png_ptr, int mode,
/* Finally, if pre-multiplying, set the background fields to achieve the
* desired result.
*/
- if (compose)
+ if (compose != 0)
{
/* And obtain alpha pre-multiplication by composing on black: */
png_memset(&png_ptr->background, 0, sizeof png_ptr->background);
@@ -389,7 +391,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
png_ptr->transformations |= PNG_QUANTIZE;
- if (!full_quantize)
+ if (full_quantize == 0)
{
int i;
@@ -444,12 +446,12 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
}
}
- if (done)
+ if (done != 0)
break;
}
/* Swap the palette around, and set up a table, if necessary */
- if (full_quantize)
+ if (full_quantize != 0)
{
int j = num_palette;
@@ -632,7 +634,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
num_new_palette--;
palette[png_ptr->index_to_palette[j]]
= palette[num_new_palette];
- if (!full_quantize)
+ if (full_quantize == 0)
{
int k;
@@ -700,7 +702,7 @@ png_set_quantize(png_structp png_ptr, png_colorp palette,
}
png_ptr->num_palette = (png_uint_16)num_palette;
- if (full_quantize)
+ if (full_quantize != 0)
{
int i;
png_bytep distance;
@@ -969,7 +971,7 @@ png_set_rgb_to_gray_fixed(png_structp png_ptr, int error_action,
png_uint_16 red_int, green_int;
/* NOTE: this calculation does not round, but this behavior is retained
- * for consistency, the inaccuracy is very small. The code here always
+ * for consistency; the inaccuracy is very small. The code here always
* overwrites the coefficients, regardless of whether they have been
* defaulted or set already.
*/
@@ -1068,7 +1070,7 @@ png_gamma_threshold(png_fixed_point screen_gamma, png_fixed_point file_gamma)
* the palette.
*/
-/*For the moment 'png_init_palette_transformations' and
+/* For the moment 'png_init_palette_transformations' and
* 'png_init_rgb_transformations' only do some flag canceling optimizations.
* The intent is that these two routines should have palette or rgb operations
* extracted from 'png_init_read_transformations'.
@@ -1093,25 +1095,31 @@ png_init_palette_transformations(png_structp png_ptr)
/* Ignore if all the entries are opaque (unlikely!) */
for (i=0; i<png_ptr->num_trans; ++i)
+ {
if (png_ptr->trans_alpha[i] == 255)
continue;
else if (png_ptr->trans_alpha[i] == 0)
input_has_transparency = 1;
else
+ {
+ input_has_transparency = 1;
input_has_alpha = 1;
+ break;
+ }
+ }
}
/* If no alpha we can optimize. */
- if (!input_has_alpha)
+ if (input_has_alpha == 0)
{
/* Any alpha means background and associative alpha processing is
- * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA
+ * required, however if the alpha is 0 or 1 throughout OPTIMIZE_ALPHA
* and ENCODE_ALPHA are irrelevant.
*/
png_ptr->transformations &= ~PNG_ENCODE_ALPHA;
png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA;
- if (!input_has_transparency)
+ if (input_has_transparency == 0)
png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND);
}
@@ -1167,10 +1175,10 @@ png_init_rgb_transformations(png_structp png_ptr)
int input_has_transparency = png_ptr->num_trans > 0;
/* If no alpha we can optimize. */
- if (!input_has_alpha)
+ if (input_has_alpha == 0)
{
/* Any alpha means background and associative alpha processing is
- * required, however if the alpha is 0 or 1 throughout OPTIIMIZE_ALPHA
+ * required, however if the alpha is 0 or 1 throughout OPTIMIZE_ALPHA
* and ENCODE_ALPHA are irrelevant.
*/
# ifdef PNG_READ_ALPHA_MODE_SUPPORTED
@@ -1178,7 +1186,7 @@ png_init_rgb_transformations(png_structp png_ptr)
png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA;
# endif
- if (!input_has_transparency)
+ if (input_has_transparency == 0)
png_ptr->transformations &= ~(PNG_COMPOSE | PNG_BACKGROUND_EXPAND);
}
@@ -1221,7 +1229,7 @@ png_init_rgb_transformations(png_structp png_ptr)
default:
case 8:
- /* Already 8 bits, fall through */
+ /* FALL THROUGH (already 8 bits) */
case 16:
/* Already a full 16 bits */
@@ -1304,7 +1312,7 @@ png_init_read_transformations(png_structp png_ptr)
* the code immediately below if the transform can be handled outside the
* row loop.
*/
- if (gamma_correction)
+ if (gamma_correction != 0)
png_ptr->transformations |= PNG_GAMMA;
else
@@ -1313,7 +1321,7 @@ png_init_read_transformations(png_structp png_ptr)
#endif
/* Certain transformations have the effect of preventing other
- * transformations that happen afterward in png_do_read_transformations,
+ * transformations that happen afterward in png_do_read_transformations;
* resolve the interdependencies here. From the code of
* png_do_read_transformations the order is:
*
@@ -1702,11 +1710,11 @@ png_init_read_transformations(png_structp png_ptr)
g_sig = png_gamma_significant(g);
gs_sig = png_gamma_significant(gs);
- if (g_sig)
+ if (g_sig != 0)
png_ptr->background_1.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, g);
- if (gs_sig)
+ if (gs_sig != 0)
png_ptr->background.gray = png_gamma_correct(png_ptr,
png_ptr->background.gray, gs);
@@ -1715,7 +1723,7 @@ png_init_read_transformations(png_structp png_ptr)
(png_ptr->background.red != png_ptr->background.gray))
{
/* RGB or RGBA with color background */
- if (g_sig)
+ if (g_sig != 0)
{
png_ptr->background_1.red = png_gamma_correct(png_ptr,
png_ptr->background.red, g);
@@ -1727,7 +1735,7 @@ png_init_read_transformations(png_structp png_ptr)
png_ptr->background.blue, g);
}
- if (gs_sig)
+ if (gs_sig != 0)
{
png_ptr->background.red = png_gamma_correct(png_ptr,
png_ptr->background.red, gs);
@@ -1770,8 +1778,8 @@ png_init_read_transformations(png_structp png_ptr)
int num_palette = png_ptr->num_palette;
int i;
- /*NOTE: there are other transformations that should probably be in here
- * too.
+ /* NOTE: there are other transformations that should probably be in
+ * here too.
*/
for (i = 0; i < num_palette; i++)
{
@@ -1830,12 +1838,15 @@ png_init_read_transformations(png_structp png_ptr)
#ifdef PNG_READ_SHIFT_SUPPORTED
if ((png_ptr->transformations & PNG_SHIFT) &&
+ !(png_ptr->transformations & PNG_EXPAND) &&
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE))
{
int i;
int istop = png_ptr->num_palette;
int shift = 8 - png_ptr->sig_bit.red;
+ png_ptr->transformations &= ~PNG_SHIFT;
+
/* significant bits can be in the range 1 to 7 for a meaninful result, if
* the number of significant bits is 0 then no shift is done (this is an
* error condition which is silently ignored.)
@@ -1895,6 +1906,9 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->bit_depth = 8;
info_ptr->num_trans = 0;
+
+ if (png_ptr->palette == NULL)
+ png_error (png_ptr, "Palette is NULL in indexed image");
}
else
{
@@ -2042,10 +2056,10 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
if (png_ptr->transformations & PNG_USER_TRANSFORM)
{
- if (info_ptr->bit_depth < png_ptr->user_transform_depth)
+ if (png_ptr->user_transform_depth)
info_ptr->bit_depth = png_ptr->user_transform_depth;
- if (info_ptr->channels < png_ptr->user_transform_channels)
+ if (png_ptr->user_transform_channels)
info_ptr->channels = png_ptr->user_transform_channels;
}
#endif
@@ -2064,7 +2078,7 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
png_ptr->info_rowbytes = info_ptr->rowbytes;
#ifndef PNG_READ_EXPAND_SUPPORTED
- if (png_ptr)
+ if (png_ptr != NULL)
return;
#endif
}
@@ -2141,7 +2155,7 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
png_do_rgb_to_gray(png_ptr, row_info,
png_ptr->row_buf + 1);
- if (rgb_error)
+ if (rgb_error != 0)
{
png_ptr->rgb_to_gray_status=1;
if ((png_ptr->transformations & PNG_RGB_TO_GRAY) ==
@@ -2195,8 +2209,8 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
#endif
-#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
- (defined PNG_READ_ALPHA_MODE_SUPPORTED)
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+ defined(PNG_READ_ALPHA_MODE_SUPPORTED)
if (png_ptr->transformations & PNG_COMPOSE)
png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr);
#endif
@@ -2207,8 +2221,8 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
/* Because RGB_TO_GRAY does the gamma transform. */
!(png_ptr->transformations & PNG_RGB_TO_GRAY) &&
#endif
-#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
- (defined PNG_READ_ALPHA_MODE_SUPPORTED)
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+ defined(PNG_READ_ALPHA_MODE_SUPPORTED)
/* Because PNG_COMPOSE does the gamma transform if there is something to
* do (if there is an alpha channel or transparency.)
*/
@@ -2274,7 +2288,7 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
#endif
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
- /*NOTE: moved here in 1.5.4 (from much later in this list.) */
+ /* NOTE: moved here in 1.5.4 (from much later in this list.) */
if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
@@ -2296,6 +2310,13 @@ png_do_read_transformations(png_structp png_ptr, png_row_infop row_info)
png_do_unpack(row_info, png_ptr->row_buf + 1);
#endif
+#ifdef PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
+ /* Added at libpng-1.5.10 */
+ if (row_info->color_type == PNG_COLOR_TYPE_PALETTE &&
+ png_ptr->num_palette_max >= 0)
+ png_do_check_palette_indexes(png_ptr, row_info);
+#endif
+
#ifdef PNG_READ_BGR_SUPPORTED
if (png_ptr->transformations & PNG_BGR)
png_do_bgr(row_info, png_ptr->row_buf + 1);
@@ -2512,7 +2533,7 @@ png_do_unshift(png_row_infop row_info, png_bytep row,
have_shift = 1;
}
- if (!have_shift)
+ if (have_shift == 0)
return;
}
@@ -2948,13 +2969,13 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 1; i < row_width; i++)
{
- *(--dp) = hi_filler;
*(--dp) = lo_filler;
+ *(--dp) = hi_filler;
*(--dp) = *(--sp);
*(--dp) = *(--sp);
}
- *(--dp) = hi_filler;
*(--dp) = lo_filler;
+ *(--dp) = hi_filler;
row_info->channels = 2;
row_info->pixel_depth = 32;
row_info->rowbytes = row_width * 4;
@@ -2969,8 +2990,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
{
*(--dp) = *(--sp);
*(--dp) = *(--sp);
- *(--dp) = hi_filler;
*(--dp) = lo_filler;
+ *(--dp) = hi_filler;
}
row_info->channels = 2;
row_info->pixel_depth = 32;
@@ -3029,8 +3050,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
png_bytep dp = sp + (png_size_t)row_width * 2;
for (i = 1; i < row_width; i++)
{
- *(--dp) = hi_filler;
*(--dp) = lo_filler;
+ *(--dp) = hi_filler;
*(--dp) = *(--sp);
*(--dp) = *(--sp);
*(--dp) = *(--sp);
@@ -3038,8 +3059,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
*(--dp) = *(--sp);
*(--dp) = *(--sp);
}
- *(--dp) = hi_filler;
*(--dp) = lo_filler;
+ *(--dp) = hi_filler;
row_info->channels = 4;
row_info->pixel_depth = 64;
row_info->rowbytes = row_width * 8;
@@ -3058,8 +3079,8 @@ png_do_read_filler(png_row_infop row_info, png_bytep row,
*(--dp) = *(--sp);
*(--dp) = *(--sp);
*(--dp) = *(--sp);
- *(--dp) = hi_filler;
*(--dp) = lo_filler;
+ *(--dp) = hi_filler;
}
row_info->channels = 4;
@@ -3273,7 +3294,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
*(dp++) = red;
}
- if (have_alpha)
+ if (have_alpha != 0)
*(dp++) = *(sp++);
}
}
@@ -3293,7 +3314,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
if (red != green || red != blue)
{
rgb_error |= 1;
- /*NOTE: this is the historical approach which simply
+ /* NOTE: this is the historical approach which simply
* truncates the results.
*/
*(dp++) = (png_byte)((rc*red + gc*green + bc*blue)>>15);
@@ -3302,7 +3323,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
else
*(dp++) = red;
- if (have_alpha)
+ if (have_alpha != 0)
*(dp++) = *(sp++);
}
}
@@ -3320,11 +3341,17 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
for (i = 0; i < row_width; i++)
{
png_uint_16 red, green, blue, w;
-
+#if 0 /* Coverity doesn't like this */
red = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
green = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
blue = (png_uint_16)(((*(sp))<<8) | *(sp + 1)); sp += 2;
+#else
+ png_byte hi,lo;
+ hi=*(sp)++; lo=*(sp)++; red = (png_uint_16)((hi << 8) | (lo));
+ hi=*(sp)++; lo=*(sp)++; green = (png_uint_16)((hi << 8) | (lo));
+ hi=*(sp)++; lo=*(sp)++; blue = (png_uint_16)((hi << 8) | (lo));
+#endif
if (red == green && red == blue)
{
if (png_ptr->gamma_16_table != NULL)
@@ -3354,7 +3381,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
*(dp++) = (png_byte)((w>>8) & 0xff);
*(dp++) = (png_byte)(w & 0xff);
- if (have_alpha)
+ if (have_alpha != 0)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);
@@ -3388,7 +3415,7 @@ png_do_rgb_to_gray(png_structp png_ptr, png_row_infop row_info, png_bytep row)
*(dp++) = (png_byte)((gray16>>8) & 0xff);
*(dp++) = (png_byte)(gray16 & 0xff);
- if (have_alpha)
+ if (have_alpha != 0)
{
*(dp++) = *(sp++);
*(dp++) = *(sp++);
@@ -3467,8 +3494,8 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette)
#ifdef PNG_READ_TRANSFORMS_SUPPORTED
-#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
- (defined PNG_READ_ALPHA_MODE_SUPPORTED)
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+ defined(PNG_READ_ALPHA_MODE_SUPPORTED)
/* Replace any alpha or transparency with the supplied background color.
* "background" is already in the screen gamma, while "background_1" is
* at a gamma of 1.0. Paletted files have already been taken care of.
@@ -3514,7 +3541,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(png_ptr->background.gray << shift);
}
- if (!shift)
+ if (shift == 0)
{
shift = 7;
sp++;
@@ -3551,7 +3578,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(g << shift);
}
- if (!shift)
+ if (shift == 0)
{
shift = 6;
sp++;
@@ -3576,7 +3603,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(png_ptr->background.gray << shift);
}
- if (!shift)
+ if (shift == 0)
{
shift = 6;
sp++;
@@ -3614,7 +3641,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(g << shift);
}
- if (!shift)
+ if (shift == 0)
{
shift = 4;
sp++;
@@ -3639,7 +3666,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp |= (png_byte)(png_ptr->background.gray << shift);
}
- if (!shift)
+ if (shift == 0)
{
shift = 4;
sp++;
@@ -3695,8 +3722,10 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
if (v == png_ptr->trans_color.gray)
{
/* Background is already in screen gamma */
- *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff);
- *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff);
+ *sp = (png_byte)((png_ptr->background.gray >> 8)
+ & 0xff);
+ *(sp + 1) = (png_byte)(png_ptr->background.gray
+ & 0xff);
}
else
@@ -3719,8 +3748,10 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
if (v == png_ptr->trans_color.gray)
{
- *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff);
- *(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff);
+ *sp = (png_byte)((png_ptr->background.gray >> 8)
+ & 0xff);
+ *(sp + 1) = (png_byte)(png_ptr->background.gray
+ & 0xff);
}
}
}
@@ -3800,9 +3831,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
/* Background is already in screen gamma */
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
- *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff);
- *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff);
- *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff);
+ *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
+ & 0xff);
+ *(sp + 3) = (png_byte)(png_ptr->background.green
+ & 0xff);
+ *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
+ & 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
}
@@ -3843,9 +3877,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
{
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
- *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff);
- *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff);
- *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff);
+ *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
+ & 0xff);
+ *(sp + 3) = (png_byte)(png_ptr->background.green
+ & 0xff);
+ *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
+ & 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
}
}
@@ -3882,7 +3919,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
v = gamma_to_1[*sp];
png_composite(w, v, a, png_ptr->background_1.gray);
- if (!optimize)
+ if (optimize == 0)
w = gamma_from_1[w];
*sp = w;
}
@@ -3900,7 +3937,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
*sp = (png_byte)png_ptr->background.gray;
else if (a < 0xff)
- png_composite(*sp, *sp, a, png_ptr->background_1.gray);
+ png_composite(*sp, *sp, a, png_ptr->background.gray);
}
}
}
@@ -3928,7 +3965,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
else if (a == 0)
{
/* Background is already in screen gamma */
- *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff);
+ *sp = (png_byte)((png_ptr->background.gray >> 8)
+ & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff);
}
@@ -3938,7 +3976,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
g = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
png_composite_16(v, g, a, png_ptr->background_1.gray);
- if (optimize)
+ if (optimize != 0)
w = v;
else
w = gamma_16_from_1[(v&0xff) >> gamma_shift][v >> 8];
@@ -3958,7 +3996,8 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
if (a == 0)
{
- *sp = (png_byte)((png_ptr->background.gray >> 8) & 0xff);
+ *sp = (png_byte)((png_ptr->background.gray >> 8)
+ & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.gray & 0xff);
}
@@ -3967,7 +4006,7 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
png_uint_16 g, v;
g = (png_uint_16)(((*sp) << 8) + *(sp + 1));
- png_composite_16(v, g, a, png_ptr->background_1.gray);
+ png_composite_16(v, g, a, png_ptr->background.gray);
*sp = (png_byte)((v >> 8) & 0xff);
*(sp + 1) = (png_byte)(v & 0xff);
}
@@ -4011,17 +4050,17 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
v = gamma_to_1[*sp];
png_composite(w, v, a, png_ptr->background_1.red);
- if (!optimize) w = gamma_from_1[w];
+ if (optimize == 0) w = gamma_from_1[w];
*sp = w;
v = gamma_to_1[*(sp + 1)];
png_composite(w, v, a, png_ptr->background_1.green);
- if (!optimize) w = gamma_from_1[w];
+ if (optimize == 0) w = gamma_from_1[w];
*(sp + 1) = w;
v = gamma_to_1[*(sp + 2)];
png_composite(w, v, a, png_ptr->background_1.blue);
- if (!optimize) w = gamma_from_1[w];
+ if (optimize == 0) w = gamma_from_1[w];
*(sp + 2) = w;
}
}
@@ -4088,9 +4127,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
/* Background is already in screen gamma */
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
- *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff);
- *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff);
- *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff);
+ *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
+ & 0xff);
+ *(sp + 3) = (png_byte)(png_ptr->background.green
+ & 0xff);
+ *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
+ & 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
}
@@ -4100,23 +4142,26 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
v = gamma_16_to_1[*(sp + 1) >> gamma_shift][*sp];
png_composite_16(w, v, a, png_ptr->background_1.red);
- if (!optimize)
- w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
+ if (optimize == 0)
+ w = gamma_16_from_1[((w&0xff) >> gamma_shift)]
+ [w >> 8];
*sp = (png_byte)((w >> 8) & 0xff);
*(sp + 1) = (png_byte)(w & 0xff);
v = gamma_16_to_1[*(sp + 3) >> gamma_shift][*(sp + 2)];
png_composite_16(w, v, a, png_ptr->background_1.green);
- if (!optimize)
- w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
+ if (optimize == 0)
+ w = gamma_16_from_1[((w&0xff) >> gamma_shift)]
+ [w >> 8];
*(sp + 2) = (png_byte)((w >> 8) & 0xff);
*(sp + 3) = (png_byte)(w & 0xff);
v = gamma_16_to_1[*(sp + 5) >> gamma_shift][*(sp + 4)];
png_composite_16(w, v, a, png_ptr->background_1.blue);
- if (!optimize)
- w = gamma_16_from_1[((w&0xff) >> gamma_shift)][w >> 8];
+ if (optimize == 0)
+ w = gamma_16_from_1[((w&0xff) >> gamma_shift)]
+ [w >> 8];
*(sp + 4) = (png_byte)((w >> 8) & 0xff);
*(sp + 5) = (png_byte)(w & 0xff);
@@ -4137,9 +4182,12 @@ png_do_compose(png_row_infop row_info, png_bytep row, png_structp png_ptr)
{
*sp = (png_byte)((png_ptr->background.red >> 8) & 0xff);
*(sp + 1) = (png_byte)(png_ptr->background.red & 0xff);
- *(sp + 2) = (png_byte)((png_ptr->background.green >> 8) & 0xff);
- *(sp + 3) = (png_byte)(png_ptr->background.green & 0xff);
- *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8) & 0xff);
+ *(sp + 2) = (png_byte)((png_ptr->background.green >> 8)
+ & 0xff);
+ *(sp + 3) = (png_byte)(png_ptr->background.green
+ & 0xff);
+ *(sp + 4) = (png_byte)((png_ptr->background.blue >> 8)
+ & 0xff);
*(sp + 5) = (png_byte)(png_ptr->background.blue & 0xff);
}
@@ -4715,7 +4763,9 @@ png_do_expand(png_row_infop row_info, png_bytep row,
{
if (row_info->bit_depth == 8)
{
- gray = gray & 0xff;
+ /* NOTE: prior to libpng 1.5.14 this cleared out the top bits of
+ * 'gray', however if those are set it is an error.
+ */
sp = row + (png_size_t)row_width - 1;
dp = row + (png_size_t)(row_width << 1) - 1;
diff --git a/drivers/png/pngrutil.c b/drivers/png/pngrutil.c
index c53117ab29..632c5c8e02 100644
--- a/drivers/png/pngrutil.c
+++ b/drivers/png/pngrutil.c
@@ -1,8 +1,8 @@
/* pngrutil.c - utilities to read a PNG file
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.25 [December 17, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -18,8 +18,6 @@
#ifdef PNG_READ_SUPPORTED
-#define png_strtod(p,a,b) strtod(a,b)
-
png_uint_32 PNGAPI
png_get_uint_31(png_structp png_ptr, png_const_bytep buf)
{
@@ -91,7 +89,13 @@ png_get_int_32)(png_const_bytep buf)
return uval;
uval = (uval ^ 0xffffffff) + 1; /* 2's complement: -x = ~x+1 */
- return -(png_int_32)uval;
+ if ((uval & 0x80000000) == 0) /* no overflow */
+ return -(png_int_32)uval;
+ /* The following has to be safe; this function only gets called on PNG data
+ * and if we get here that data is invalid. 0 is the most safe value and
+ * if not then an attacker would surely just generate a PNG with 0 instead.
+ */
+ return 0;
}
/* Grab an unsigned 16-bit integer from a buffer in big-endian format. */
@@ -211,7 +215,7 @@ png_crc_finish(png_structp png_ptr, png_uint_32 skip)
png_crc_read(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
}
- if (i)
+ if (i != 0)
{
png_crc_read(png_ptr, png_ptr->zbuf, i);
}
@@ -267,7 +271,7 @@ png_crc_error(png_structp png_ptr)
/* The chunk CRC must be serialized in a single I/O call. */
png_read_data(png_ptr, crc_bytes, 4);
- if (need_crc)
+ if (need_crc != 0)
{
crc = png_get_uint_32(crc_bytes);
return ((int)(crc != png_ptr->crc));
@@ -284,6 +288,17 @@ png_inflate(png_structp png_ptr, png_bytep data, png_size_t size,
{
png_size_t count = 0;
+ /* HACK: added in libpng 1.5.18: the progressive reader always leaves
+ * png_ptr->zstream in a non-reset state. This causes a reset if it needs to
+ * be used again. This only copes with that one specific error; see libpng
+ * 1.6 for a better solution.
+ */
+ if ((png_ptr->flags & PNG_FLAG_ZSTREAM_PROGRESSIVE) != 0)
+ {
+ (void)inflateReset(&png_ptr->zstream);
+ png_ptr->flags &= ~PNG_FLAG_ZSTREAM_PROGRESSIVE;
+ }
+
/* zlib can't necessarily handle more than 65535 bytes at once (i.e. it can't
* even necessarily handle 65536 bytes) because the type uInt is "16 bits or
* more". Consequently it is necessary to chunk the input to zlib. This
@@ -432,15 +447,16 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
/* Now check the limits on this chunk - if the limit fails the
* compressed data will be removed, the prefix will remain.
*/
-#ifdef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
- if (png_ptr->user_chunk_malloc_max &&
+ if (prefix_size >= (~(png_size_t)0) - 1 ||
+ expanded_size >= (~(png_size_t)0) - 1 - prefix_size
+#ifdef PNG_USER_LIMITS_SUPPORTED
+ || (png_ptr->user_chunk_malloc_max &&
(prefix_size + expanded_size >= png_ptr->user_chunk_malloc_max - 1))
#else
-# ifdef PNG_USER_CHUNK_MALLOC_MAX
- if ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
+ || ((PNG_USER_CHUNK_MALLOC_MAX > 0) &&
prefix_size + expanded_size >= PNG_USER_CHUNK_MALLOC_MAX - 1)
-# endif
#endif
+ )
png_warning(png_ptr, "Exceeded size limit while expanding chunk");
/* If the size is zero either there was an error and a message
@@ -448,12 +464,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
* and we have nothing to do - the code will exit through the
* error case below.
*/
-#if defined(PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED) || \
- defined(PNG_USER_CHUNK_MALLOC_MAX)
else if (expanded_size > 0)
-#else
- if (expanded_size > 0)
-#endif
{
/* Success (maybe) - really uncompress the chunk. */
png_size_t new_size = 0;
@@ -600,7 +611,7 @@ void /* PRIVATE */
png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
{
png_color palette[PNG_MAX_PALETTE_LENGTH];
- int num, i;
+ int max_palette_length, num, i;
#ifdef PNG_POINTER_INDEXING_SUPPORTED
png_colorp pal_ptr;
#endif
@@ -653,8 +664,22 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
}
}
+ /* The cast is safe because 'length' is less than 3*PNG_MAX_PALETTE_LENGTH */
num = (int)length / 3;
+ /* If the palette has 256 or fewer entries but is too large for the bit
+ * depth, we don't issue an error, to preserve the behavior of previous
+ * libpng versions. We silently truncate the unused extra palette entries
+ * here.
+ */
+ if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
+ max_palette_length = (1 << png_ptr->bit_depth);
+ else
+ max_palette_length = PNG_MAX_PALETTE_LENGTH;
+
+ if (num > max_palette_length)
+ num = max_palette_length;
+
#ifdef PNG_POINTER_INDEXING_SUPPORTED
for (i = 0, pal_ptr = palette; i < num; i++, pal_ptr++)
{
@@ -687,7 +712,7 @@ png_handle_PLTE(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
#endif
{
- png_crc_finish(png_ptr, 0);
+ png_crc_finish(png_ptr, (int) length - num * 3);
}
#ifndef PNG_READ_OPT_PLTE_SUPPORTED
@@ -1261,13 +1286,16 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* Should be an error, but we can cope with it */
png_warning(png_ptr, "Out of place iCCP chunk");
- if (info_ptr != NULL && (info_ptr->valid & PNG_INFO_iCCP))
+ if ((png_ptr->mode & PNG_HAVE_iCCP) || (info_ptr != NULL &&
+ (info_ptr->valid & (PNG_INFO_iCCP|PNG_INFO_sRGB))))
{
png_warning(png_ptr, "Duplicate iCCP chunk");
png_crc_finish(png_ptr, length);
return;
}
+ png_ptr->mode |= PNG_HAVE_iCCP;
+
#ifdef PNG_MAX_MALLOC_64K
if (length > (png_uint_32)65535L)
{
@@ -1279,7 +1307,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = (png_charp)png_malloc(png_ptr, length + 1);
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
@@ -1299,7 +1327,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* There should be at least one zero (the compression type byte)
* following the separator, and we should be on it
*/
- if (profile >= png_ptr->chunkdata + slength - 1)
+ if (slength < 1U || profile >= png_ptr->chunkdata + slength - 1U)
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
@@ -1310,7 +1338,7 @@ png_handle_iCCP(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* Compression_type should always be zero */
compression_type = *profile++;
- if (compression_type)
+ if (compression_type != 0)
{
png_warning(png_ptr, "Ignoring nonzero compression type in iCCP chunk");
compression_type = 0x00; /* Reset it to zero (libpng-1.0.6 through 1.0.8
@@ -1429,7 +1457,7 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
* that the PNG_MAX_MALLOC_64K test is enabled in this case, but this is a
* potential breakage point if the types in pngconf.h aren't exactly right.
*/
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
@@ -1448,7 +1476,8 @@ png_handle_sPLT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
++entry_start;
/* A sample depth should follow the separator, and we should be on it */
- if (entry_start > (png_bytep)png_ptr->chunkdata + slength - 2)
+ if (slength < 2U ||
+ entry_start > (png_bytep)png_ptr->chunkdata + slength - 2U)
{
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
@@ -1797,16 +1826,16 @@ png_handle_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- num = length / 2 ;
-
- if (num != (unsigned int)png_ptr->num_palette || num >
- (unsigned int)PNG_MAX_PALETTE_LENGTH)
+ if (length > 2*PNG_MAX_PALETTE_LENGTH ||
+ length != (unsigned int) (2*png_ptr->num_palette))
{
png_warning(png_ptr, "Incorrect hIST chunk length");
png_crc_finish(png_ptr, length);
return;
}
+ num = length / 2 ;
+
for (i = 0; i < num; i++)
{
png_byte buf[2];
@@ -1956,7 +1985,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
@@ -1977,7 +2006,7 @@ png_handle_pCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* We need to have at least 12 bytes after the purpose string
* in order to get the parameter information.
*/
- if (endptr <= buf + 12)
+ if (endptr - buf <= 12)
{
png_warning(png_ptr, "Invalid pCAL data");
png_free(png_ptr, png_ptr->chunkdata);
@@ -2105,7 +2134,7 @@ png_handle_sCAL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
png_ptr->chunkdata[slength] = 0x00; /* Null terminate the last string */
@@ -2265,7 +2294,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, skip))
@@ -2310,7 +2339,7 @@ png_handle_tEXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_ptr->chunkdata = NULL;
png_free(png_ptr, text_ptr);
- if (ret)
+ if (ret != 0)
png_warning(png_ptr, "Insufficient memory to process text chunk");
}
#endif
@@ -2373,7 +2402,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
@@ -2389,7 +2418,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
/* Empty loop */ ;
/* zTXt must have some text after the chunkdataword */
- if (text >= png_ptr->chunkdata + slength - 2)
+ if (slength < 2U || text >= png_ptr->chunkdata + slength - 2U)
{
png_warning(png_ptr, "Truncated zTXt chunk");
png_free(png_ptr, png_ptr->chunkdata);
@@ -2440,7 +2469,7 @@ png_handle_zTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
- if (ret)
+ if (ret != 0)
png_error(png_ptr, "Insufficient memory to store zTXt chunk");
}
#endif
@@ -2453,7 +2482,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_textp text_ptr;
png_charp key, lang, text, lang_key;
int comp_flag;
- int comp_type = 0;
+ int comp_type;
int ret;
png_size_t slength, prefix_len, data_len;
@@ -2504,7 +2533,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- slength = (png_size_t)length;
+ slength = length;
png_crc_read(png_ptr, (png_bytep)png_ptr->chunkdata, slength);
if (png_crc_finish(png_ptr, 0))
@@ -2526,7 +2555,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
* keyword
*/
- if (lang >= png_ptr->chunkdata + slength - 3)
+ if (slength < 3U || lang >= png_ptr->chunkdata + slength - 3U)
{
png_warning(png_ptr, "Truncated iTXt chunk");
png_free(png_ptr, png_ptr->chunkdata);
@@ -2534,18 +2563,30 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- else
- {
- comp_flag = *lang++;
- comp_type = *lang++;
- }
+ comp_flag = *lang++;
+ comp_type = *lang++;
- if (comp_type || (comp_flag && comp_flag != PNG_TEXT_COMPRESSION_zTXt))
+ /* 1.5.14: The spec says "for uncompressed text decoders shall ignore [the
+ * compression type]". The compression flag shall be 0 (no compression) or
+ * 1 (compressed with method 0 - deflate.)
+ */
+ if (comp_flag/*compressed*/ != 0)
{
- png_warning(png_ptr, "Unknown iTXt compression type or method");
- png_free(png_ptr, png_ptr->chunkdata);
- png_ptr->chunkdata = NULL;
- return;
+ if (comp_flag != 1)
+ {
+ png_warning(png_ptr, "invalid iTXt compression flag");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
+
+ if (comp_type != 0)
+ {
+ png_warning(png_ptr, "unknown iTXt compression type");
+ png_free(png_ptr, png_ptr->chunkdata);
+ png_ptr->chunkdata = NULL;
+ return;
+ }
}
for (lang_key = lang; *lang_key; lang_key++)
@@ -2578,7 +2619,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
key=png_ptr->chunkdata;
- if (comp_flag)
+ if (comp_flag/*compressed*/)
png_decompress_chunk(png_ptr, comp_type,
(size_t)length, prefix_len, &data_len);
@@ -2596,7 +2637,8 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
return;
}
- text_ptr->compression = (int)comp_flag + 1;
+ text_ptr->compression =
+ (comp_flag ? PNG_ITXT_COMPRESSION_zTXt : PNG_ITXT_COMPRESSION_NONE);
text_ptr->lang_key = png_ptr->chunkdata + (lang_key - key);
text_ptr->lang = png_ptr->chunkdata + (lang - key);
text_ptr->itxt_length = data_len;
@@ -2610,7 +2652,7 @@ png_handle_iTXt(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
png_free(png_ptr, png_ptr->chunkdata);
png_ptr->chunkdata = NULL;
- if (ret)
+ if (ret != 0)
png_error(png_ptr, "Insufficient memory to store iTXt chunk");
}
#endif
@@ -2787,7 +2829,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
{
unsigned int pixel_depth = png_ptr->transformed_pixel_depth;
png_const_bytep sp = png_ptr->row_buf + 1;
- png_uint_32 row_width = png_ptr->width;
+ png_alloc_size_t row_width = png_ptr->width;
unsigned int pass = png_ptr->pass;
png_bytep end_ptr = 0;
png_byte end_byte = 0;
@@ -2939,7 +2981,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
# define S_MASKS(d,s) { S_MASK(0,d,s), S_MASK(1,d,s), S_MASK(2,d,s),\
S_MASK(3,d,s), S_MASK(4,d,s), S_MASK(5,d,s) }
-# define B_MASKS(d,s) { B_MASK(1,d,s), S_MASK(3,d,s), S_MASK(5,d,s) }
+# define B_MASKS(d,s) { B_MASK(1,d,s), B_MASK(3,d,s), B_MASK(5,d,s) }
# define DEPTH_INDEX(d) ((d)==1?0:((d)==2?1:2))
@@ -3050,7 +3092,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
}
/* Work out the bytes to copy. */
- if (display)
+ if (display != 0)
{
/* When doing the 'block' algorithm the pixel in the pass gets
* replicated to adjacent pixels. This is why the even (0,2,4,6)
@@ -3060,7 +3102,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
/* But don't allow this number to exceed the actual row width. */
if (bytes_to_copy > row_width)
- bytes_to_copy = row_width;
+ bytes_to_copy = (unsigned int)/*SAFE*/row_width;
}
else /* normal row; Adam7 only ever gives us one pixel to copy. */
@@ -3152,7 +3194,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
{
png_uint_32p dp32 = (png_uint_32p)dp;
png_const_uint_32p sp32 = (png_const_uint_32p)sp;
- unsigned int skip = (bytes_to_jump-bytes_to_copy) /
+ size_t skip = (bytes_to_jump-bytes_to_copy) /
sizeof (png_uint_32);
do
@@ -3193,7 +3235,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
{
png_uint_16p dp16 = (png_uint_16p)dp;
png_const_uint_16p sp16 = (png_const_uint_16p)sp;
- unsigned int skip = (bytes_to_jump-bytes_to_copy) /
+ size_t skip = (bytes_to_jump-bytes_to_copy) /
sizeof (png_uint_16);
do
@@ -3238,7 +3280,7 @@ png_combine_row(png_structp png_ptr, png_bytep dp, int display)
dp += bytes_to_jump;
row_width -= bytes_to_jump;
if (bytes_to_copy > row_width)
- bytes_to_copy = row_width;
+ bytes_to_copy = (unsigned int)/*SAFE*/row_width;
}
}
@@ -3477,7 +3519,7 @@ png_do_read_interlace(png_row_infop row_info, png_bytep row, int pass,
for (i = 0; i < row_info->width; i++)
{
- png_byte v[8];
+ png_byte v[8]; /* SAFE; pixel_depth does not exceed 64 */
int j;
png_memcpy(v, sp, pixel_bytes);
@@ -3661,68 +3703,6 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
}
}
-#ifdef PNG_ARM_NEON
-
-#if 0
-#ifdef __linux__
-#include <stdio.h>
-#include <elf.h>
-#include <asm/hwcap.h>
-
-static int png_have_hwcap(unsigned cap)
-{
- FILE *f = fopen("/proc/self/auxv", "r");
- Elf32_auxv_t aux;
- int have_cap = 0;
-
- if (!f)
- return 0;
-
- while (fread(&aux, sizeof(aux), 1, f) > 0)
- {
- if (aux.a_type == AT_HWCAP &&
- aux.a_un.a_val & cap)
- {
- have_cap = 1;
- break;
- }
- }
-
- fclose(f);
-
- return have_cap;
-}
-#endif /* __linux__ */
-#endif
-static void
-png_init_filter_functions_neon(png_structp pp, unsigned int bpp)
-{
-#if 0
-#ifdef __linux__
- if (!png_have_hwcap(HWCAP_NEON))
- return;
-#endif
-#endif
- pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
-
- if (bpp == 3)
- {
- pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon;
- pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon;
- pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
- png_read_filter_row_paeth3_neon;
- }
-
- else if (bpp == 4)
- {
- pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon;
- pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon;
- pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
- png_read_filter_row_paeth4_neon;
- }
-}
-#endif /* PNG_ARM_NEON */
-
static void
png_init_filter_functions(png_structp pp)
{
@@ -3738,8 +3718,16 @@ png_init_filter_functions(png_structp pp)
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
png_read_filter_row_paeth_multibyte_pixel;
-#ifdef PNG_ARM_NEON
- png_init_filter_functions_neon(pp, bpp);
+#ifdef PNG_FILTER_OPTIMIZATIONS
+ /* To use this define PNG_FILTER_OPTIMIZATIONS as the name of a function to
+ * call to install hardware optimizations for the above functions; simply
+ * replace whatever elements of the pp->read_filter[] array with a hardware
+ * specific (or, for that matter, generic) optimization.
+ *
+ * To see an example of this examine what configure.ac does when
+ * --enable-arm-neon is specified on the command line.
+ */
+ PNG_FILTER_OPTIMIZATIONS(pp, bpp);
#endif
}
@@ -3747,10 +3735,13 @@ void /* PRIVATE */
png_read_filter_row(png_structp pp, png_row_infop row_info, png_bytep row,
png_const_bytep prev_row, int filter)
{
- if (pp->read_filter[0] == NULL)
- png_init_filter_functions(pp);
if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)
+ {
+ if (pp->read_filter[0] == NULL)
+ png_init_filter_functions(pp);
+
pp->read_filter[filter-1](row_info, row, prev_row);
+ }
}
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
diff --git a/drivers/png/pngset.c b/drivers/png/pngset.c
index 92db3890a8..61be6bc62e 100644
--- a/drivers/png/pngset.c
+++ b/drivers/png/pngset.c
@@ -1,8 +1,8 @@
/* pngset.c - storage of image information into info struct
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.26 [December 17, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -20,6 +20,60 @@
#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
+#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) ||\
+ defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
+/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
+ * and if invalid, correct the keyword rather than discarding the entire
+ * chunk. The PNG 1.0 specification requires keywords 1-79 characters in
+ * length, forbids leading or trailing whitespace, multiple internal spaces,
+ * and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
+ *
+ * The 'new_key' buffer must be 80 characters in size (for the keyword plus a
+ * trailing '\0'). If this routine returns 0 then there was no keyword, or a
+ * valid one could not be generated, and the caller must handle the error by not
+ * setting the keyword.
+ */
+static png_uint_32
+png_check_keyword(png_const_charp key, png_bytep new_key)
+{
+ png_uint_32 key_len = 0;
+ int space = 1;
+
+ if (key == NULL)
+ {
+ *new_key = 0;
+ return 0;
+ }
+
+ while (*key && key_len < 79)
+ {
+ png_byte ch = (png_byte)*key++;
+
+ if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/))
+ *new_key++ = ch, ++key_len, space = 0;
+
+ else if (space == 0)
+ {
+ /* A space or an invalid character when one wasn't seen immediately
+ * before; output just a space.
+ */
+ *new_key++ = 32, ++key_len, space = 1;
+ }
+ }
+
+ if (key_len > 0 && space != 0) /* trailing space */
+ --key_len, --new_key;
+
+ /* Terminate the keyword */
+ *new_key = 0;
+
+ if (key_len == 0)
+ return 0;
+
+ return key_len;
+}
+#endif /* TEXT || pCAL || iCCP || sPLT */
+
#ifdef PNG_bKGD_SUPPORTED
void PNGAPI
png_set_bKGD(png_structp png_ptr, png_infop info_ptr,
@@ -123,12 +177,12 @@ png_set_cHRM_XYZ(png_structp png_ptr, png_infop info_ptr, double red_X,
png_fixed(png_ptr, red_X, "cHRM Red X"),
png_fixed(png_ptr, red_Y, "cHRM Red Y"),
png_fixed(png_ptr, red_Z, "cHRM Red Z"),
- png_fixed(png_ptr, green_X, "cHRM Red X"),
- png_fixed(png_ptr, green_Y, "cHRM Red Y"),
- png_fixed(png_ptr, green_Z, "cHRM Red Z"),
- png_fixed(png_ptr, blue_X, "cHRM Red X"),
- png_fixed(png_ptr, blue_Y, "cHRM Red Y"),
- png_fixed(png_ptr, blue_Z, "cHRM Red Z"));
+ png_fixed(png_ptr, green_X, "cHRM Green X"),
+ png_fixed(png_ptr, green_Y, "cHRM Green Y"),
+ png_fixed(png_ptr, green_Z, "cHRM Green Z"),
+ png_fixed(png_ptr, blue_X, "cHRM Blue X"),
+ png_fixed(png_ptr, blue_Y, "cHRM Blue Y"),
+ png_fixed(png_ptr, blue_Z, "cHRM Blue Z"));
}
# endif /* PNG_FLOATING_POINT_SUPPORTED */
@@ -149,7 +203,7 @@ png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
* possible for 1/gamma to overflow the limit of 21474 and this means the
* gamma value must be at least 5/100000 and hence at most 20000.0. For
* safety the limits here are a little narrower. The values are 0.00016 to
- * 6250.0, which are truly ridiculous gammma values (and will produce
+ * 6250.0, which are truly ridiculous gamma values (and will produce
* displays that are all black or all white.)
*/
if (file_gamma < 16 || file_gamma > 625000000)
@@ -252,16 +306,7 @@ png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
- /* Check for potential overflow */
- if (width >
- (PNG_UINT_32_MAX >> 3) /* 8-byte RRGGBBAA pixels */
- - 48 /* bigrowbuf hack */
- - 1 /* filter byte */
- - 7*8 /* rounding of width to multiple of 8 pixels */
- - 8) /* extra max_pixel_depth pad */
- info_ptr->rowbytes = 0;
- else
- info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
+ info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
}
#ifdef PNG_oFFs_SUPPORTED
@@ -287,6 +332,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
int nparams, png_const_charp units, png_charpp params)
{
+ png_byte new_purpose[80];
png_size_t length;
int i;
@@ -295,7 +341,15 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL)
return;
- length = png_strlen(purpose) + 1;
+ length = png_check_keyword(purpose, new_purpose);
+
+ if (length == 0)
+ {
+ png_warning(png_ptr, "pCAL: invalid purpose keyword");
+ return;
+ }
+
+ ++length;
png_debug1(3, "allocating purpose for info (%lu bytes)",
(unsigned long)length);
@@ -318,7 +372,7 @@ png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
return;
}
- png_memcpy(info_ptr->pcal_purpose, purpose, length);
+ png_memcpy(info_ptr->pcal_purpose, new_purpose, length);
png_debug(3, "storing X0, X1, type, and nparams in info");
info_ptr->pcal_X0 = X0;
@@ -517,12 +571,17 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_const_colorp palette, int num_palette)
{
+ png_uint_32 max_palette_length;
+
png_debug1(1, "in %s storage function", "PLTE");
if (png_ptr == NULL || info_ptr == NULL)
return;
- if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
+ max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
+ (1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
+
+ if (num_palette < 0 || num_palette > (int) max_palette_length)
{
if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
png_error(png_ptr, "Invalid palette length");
@@ -541,8 +600,8 @@ png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
/* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
- * of num_palette entries, in case of an invalid PNG file that has
- * too-large sample values.
+ * of num_palette entries, in case of an invalid PNG file or incorrect
+ * call to png_set_PLTE() with too-large sample values.
*/
png_ptr->palette = (png_colorp)png_calloc(png_ptr,
PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
@@ -618,6 +677,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
png_const_charp name, int compression_type,
png_const_bytep profile, png_uint_32 proflen)
{
+ png_byte new_name[80];
png_charp new_iccp_name;
png_bytep new_iccp_profile;
png_size_t length;
@@ -627,7 +687,15 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
return;
- length = png_strlen(name)+1;
+ length = png_check_keyword(name, new_name);
+
+ if (length == 0)
+ {
+ png_warning(png_ptr, "iCCP: invalid keyword");
+ return;
+ }
+
+ ++length;
new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
if (new_iccp_name == NULL)
@@ -636,7 +704,7 @@ png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
return;
}
- png_memcpy(new_iccp_name, name, length);
+ png_memcpy(new_iccp_name, new_name, length);
new_iccp_profile = (png_bytep)png_malloc_warn(png_ptr, proflen);
if (new_iccp_profile == NULL)
@@ -671,7 +739,7 @@ png_set_text(png_structp png_ptr, png_infop info_ptr, png_const_textp text_ptr,
int ret;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
- if (ret)
+ if (ret != 0)
png_error(png_ptr, "Insufficient memory to store text");
}
@@ -680,8 +748,9 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
png_const_textp text_ptr, int num_text)
{
int i;
+ size_t element_size;
- png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :
+ png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11 :
(unsigned long)png_ptr->chunk_name);
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
@@ -690,26 +759,42 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
/* Make sure we have enough space in the "text" array in info_struct
* to hold all of the incoming text_ptr objects.
*/
+
+ element_size=png_sizeof(png_text);
+ if (num_text < 0 ||
+ num_text > INT_MAX - info_ptr->num_text - 8 ||
+ (unsigned int)/*SAFE*/(num_text +/*SAFE*/
+ info_ptr->num_text + 8) >=
+ PNG_SIZE_MAX/element_size)
+ {
+ png_warning(png_ptr, "too many text chunks");
+ return(0);
+ }
+
if (info_ptr->num_text + num_text > info_ptr->max_text)
{
+ int old_max_text = info_ptr->max_text;
+ int old_num_text = info_ptr->num_text;
+
if (info_ptr->text != NULL)
{
png_textp old_text;
- int old_max;
- old_max = info_ptr->max_text;
info_ptr->max_text = info_ptr->num_text + num_text + 8;
old_text = info_ptr->text;
+
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
if (info_ptr->text == NULL)
{
- png_free(png_ptr, old_text);
+ /* Restore to previous condition */
+ info_ptr->max_text = old_max_text;
+ info_ptr->text = old_text;
return(1);
}
- png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
+ png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *
png_sizeof(png_text)));
png_free(png_ptr, old_text);
}
@@ -721,7 +806,12 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
if (info_ptr->text == NULL)
+ {
+ /* Restore to previous condition */
+ info_ptr->num_text = old_num_text;
+ info_ptr->max_text = old_max_text;
return(1);
+ }
info_ptr->free_me |= PNG_FREE_TEXT;
}
@@ -730,6 +820,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
}
for (i = 0; i < num_text; i++)
{
+ png_byte new_key[80], new_lang[80];
png_size_t text_length, key_len;
png_size_t lang_len, lang_key_len;
png_textp textp = &(info_ptr->text[info_ptr->num_text]);
@@ -744,7 +835,13 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
continue;
}
- key_len = png_strlen(text_ptr[i].key);
+ key_len = png_check_keyword(text_ptr[i].key, new_key);
+
+ if (key_len == 0)
+ {
+ png_warning(png_ptr, "invalid text keyword");
+ continue;
+ }
if (text_ptr[i].compression <= 0)
{
@@ -757,8 +854,9 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
{
/* Set iTXt data */
+ /* Zero length language is OK */
if (text_ptr[i].lang != NULL)
- lang_len = png_strlen(text_ptr[i].lang);
+ lang_len = png_check_keyword(text_ptr[i].lang, new_lang);
else
lang_len = 0;
@@ -806,7 +904,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
(key_len + lang_len + lang_key_len + text_length + 4),
textp->key);
- png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
+ png_memcpy(textp->key, new_key, (png_size_t)(key_len));
*(textp->key + key_len) = '\0';
if (text_ptr[i].compression > 0)
@@ -827,7 +925,7 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr,
textp->text = textp->key + key_len + 1;
}
- if (text_length)
+ if (text_length != 0)
png_memcpy(textp->text, text_ptr[i].text,
(png_size_t)(text_length));
@@ -888,6 +986,12 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
if (png_ptr == NULL || info_ptr == NULL)
return;
+ if (num_trans < 0 || num_trans > PNG_MAX_PALETTE_LENGTH)
+ {
+ png_warning(png_ptr, "Ignoring invalid num_trans value");
+ return;
+ }
+
if (trans_alpha != NULL)
{
/* It may not actually be necessary to set png_ptr->trans_alpha here;
@@ -907,16 +1011,19 @@ png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
if (trans_color != NULL)
{
- int sample_max = (1 << info_ptr->bit_depth);
-
- if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
- (int)trans_color->gray > sample_max) ||
- (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
- ((int)trans_color->red > sample_max ||
- (int)trans_color->green > sample_max ||
- (int)trans_color->blue > sample_max)))
- png_warning(png_ptr,
- "tRNS chunk has out-of-range samples for bit_depth");
+ if (info_ptr->bit_depth < 16)
+ {
+ unsigned int sample_max = (1U << info_ptr->bit_depth) - 1U;
+
+ if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
+ trans_color->gray > sample_max) ||
+ (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
+ (trans_color->red > sample_max ||
+ trans_color->green > sample_max ||
+ trans_color->blue > sample_max)))
+ png_warning(png_ptr,
+ "tRNS chunk has out-of-range samples for bit_depth");
+ }
png_memcpy(&(info_ptr->trans_color), trans_color,
png_sizeof(png_color_16));
@@ -949,14 +1056,25 @@ png_set_sPLT(png_structp png_ptr,
*/
{
png_sPLT_tp np;
- int i;
+ int i, j;
+ size_t element_size;
if (png_ptr == NULL || info_ptr == NULL)
return;
- np = (png_sPLT_tp)png_malloc_warn(png_ptr,
- (info_ptr->splt_palettes_num + nentries) *
- (png_size_t)png_sizeof(png_sPLT_t));
+ element_size = png_sizeof(png_sPLT_t);
+ if (nentries < 0 ||
+ nentries > INT_MAX-info_ptr->splt_palettes_num ||
+ (unsigned int)/*SAFE*/(nentries +/*SAFE*/
+ info_ptr->splt_palettes_num) >=
+ PNG_SIZE_MAX/element_size)
+ np=NULL;
+
+ else
+
+ np = (png_sPLT_tp)png_malloc_warn(png_ptr,
+ (info_ptr->splt_palettes_num + nentries) *
+ (png_size_t)png_sizeof(png_sPLT_t));
if (np == NULL)
{
@@ -970,13 +1088,22 @@ png_set_sPLT(png_structp png_ptr,
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes=NULL;
- for (i = 0; i < nentries; i++)
+ for (i = j = 0; i < nentries; i++)
{
- png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
+ png_sPLT_tp to = np + info_ptr->splt_palettes_num + j;
png_const_sPLT_tp from = entries + i;
+ png_byte new_name[80];
png_size_t length;
- length = png_strlen(from->name) + 1;
+ length = png_check_keyword(from->name, new_name);
+
+ if (length == 0)
+ {
+ png_warning(png_ptr, "sPLT: invalid keyword");
+ continue;
+ }
+
+ ++length; /* for trailing '\0' */
to->name = (png_charp)png_malloc_warn(png_ptr, length);
if (to->name == NULL)
@@ -986,7 +1113,7 @@ png_set_sPLT(png_structp png_ptr,
continue;
}
- png_memcpy(to->name, from->name, length);
+ png_memcpy(to->name, new_name, length);
to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
from->nentries * png_sizeof(png_sPLT_entry));
@@ -1004,10 +1131,11 @@ png_set_sPLT(png_structp png_ptr,
to->nentries = from->nentries;
to->depth = from->depth;
+ ++j;
}
info_ptr->splt_palettes = np;
- info_ptr->splt_palettes_num += nentries;
+ info_ptr->splt_palettes_num = j;
info_ptr->valid |= PNG_INFO_sPLT;
info_ptr->free_me |= PNG_FREE_SPLT;
}
@@ -1020,13 +1148,23 @@ png_set_unknown_chunks(png_structp png_ptr,
{
png_unknown_chunkp np;
int i;
+ size_t element_size;
if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
return;
- np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
- (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
- png_sizeof(png_unknown_chunk));
+ element_size = png_sizeof(png_unknown_chunk);
+ if (num_unknowns < 0 ||
+ num_unknowns > INT_MAX-info_ptr->unknown_chunks_num ||
+ (unsigned int)/*SAFE*/(num_unknowns +/*SAFE*/
+ info_ptr->unknown_chunks_num) >=
+ PNG_SIZE_MAX/element_size)
+ np=NULL;
+
+ else
+ np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
+ (png_size_t)(info_ptr->unknown_chunks_num + num_unknowns) *
+ png_sizeof(png_unknown_chunk));
if (np == NULL)
{
@@ -1189,11 +1327,12 @@ png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
info_ptr->row_pointers = row_pointers;
- if (row_pointers)
+ if (row_pointers != NULL)
info_ptr->valid |= PNG_INFO_IDAT;
}
#endif
+#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
void PNGAPI
png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
{
@@ -1221,6 +1360,7 @@ png_set_compression_buffer_size(png_structp png_ptr, png_size_t size)
png_ptr->zstream.avail_out = 0;
png_ptr->zstream.avail_in = 0;
}
+#endif /* WRITE_CUSTOMIZE_COMPRESSION */
void PNGAPI
png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
@@ -1239,7 +1379,7 @@ png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
{
/* Images with dimensions larger than these limits will be
* rejected by png_set_IHDR(). To accept any PNG datastream
- * regardless of dimensions, set both limits to 0x7ffffffL.
+ * regardless of dimensions, set both limits to 0x7fffffffL.
*/
if (png_ptr == NULL)
return;
@@ -1253,7 +1393,7 @@ void PNGAPI
png_set_chunk_cache_max (png_structp png_ptr,
png_uint_32 user_chunk_cache_max)
{
- if (png_ptr)
+ if (png_ptr != NULL)
png_ptr->user_chunk_cache_max = user_chunk_cache_max;
}
@@ -1262,7 +1402,7 @@ void PNGAPI
png_set_chunk_malloc_max (png_structp png_ptr,
png_alloc_size_t user_chunk_malloc_max)
{
- if (png_ptr)
+ if (png_ptr != NULL)
png_ptr->user_chunk_malloc_max = user_chunk_malloc_max;
}
#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
@@ -1274,11 +1414,28 @@ png_set_benign_errors(png_structp png_ptr, int allowed)
{
png_debug(1, "in png_set_benign_errors");
- if (allowed)
+ if (allowed != 0)
png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
else
png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
}
#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
+
+#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
+/* Whether to report invalid palette index; added at libng-1.5.10
+ * allowed - one of 0: disable; 1: enable
+ */
+void PNGAPI
+png_set_check_for_invalid_index(png_structp png_ptr, int allowed)
+{
+ png_debug(1, "in png_set_check_for_invalid_index");
+
+ if (allowed != 0)
+ png_ptr->num_palette_max = 0;
+
+ else
+ png_ptr->num_palette_max = -1;
+}
+#endif
#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
diff --git a/drivers/png/pngstruct.h b/drivers/png/pngstruct.h
index 07f3a04255..52eef80e69 100644
--- a/drivers/png/pngstruct.h
+++ b/drivers/png/pngstruct.h
@@ -1,12 +1,11 @@
/* pngstruct.h - header file for PNG reference library
*
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.23 [July 23, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
- * Last changed in libpng 1.5.5 [September 22, 2011]
- *
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
@@ -121,6 +120,12 @@ struct png_struct_def
png_uint_32 crc; /* current chunk CRC value */
png_colorp palette; /* palette from the input file */
png_uint_16 num_palette; /* number of color entries in palette */
+
+/* Added at libpng-1.5.10 */
+#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
+ int num_palette_max; /* maximum palette index found in IDAT */
+#endif
+
png_uint_16 num_trans; /* number of transparency values */
png_byte compression; /* file compression type (always 0) */
png_byte filter; /* file filter type (always 0) */
@@ -211,13 +216,6 @@ struct png_struct_def
int process_mode; /* what push library is currently doing */
int cur_palette; /* current push library palette index */
-# ifdef PNG_TEXT_SUPPORTED
- png_size_t current_text_size; /* current size of text input data */
- png_size_t current_text_left; /* how much text left to read in input */
- png_charp current_text; /* current text chunk buffer */
- png_charp current_text_ptr; /* current location in current_text */
-# endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */
-
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
@@ -238,17 +236,8 @@ struct png_struct_def
png_uint_16p hist; /* histogram */
#endif
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_byte heuristic_method; /* heuristic for row filter selection */
- png_byte num_prev_filters; /* number of weights for previous rows */
- png_bytep prev_filters; /* filter type(s) of previous row(s) */
- png_uint_16p filter_weights; /* weight(s) for previous line(s) */
- png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */
- png_uint_16p filter_costs; /* relative filter calculation cost */
- png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */
-#endif
-
#ifdef PNG_TIME_RFC1123_SUPPORTED
+ /* This is going to be unused in libpng16 and removed from libpng17 */
char time_buffer[29]; /* String to hold RFC 1123 time text */
#endif
@@ -283,9 +272,7 @@ struct png_struct_def
#endif
/* New member added in libpng-1.0.4 (renamed in 1.0.9) */
-#if defined(PNG_MNG_FEATURES_SUPPORTED) || \
- defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
- defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
+#if defined(PNG_MNG_FEATURES_SUPPORTED)
/* Changed from png_byte to png_uint_32 at version 1.2.0 */
png_uint_32 mng_features_permitted;
#endif
@@ -354,7 +341,13 @@ struct png_struct_def
/* New member added in libpng-1.5.6 */
png_bytep big_prev_row;
+/* New member added in libpng-1.5.7 */
void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
png_bytep row, png_const_bytep prev_row);
+
+ /* Options */
+#ifdef PNG_SET_OPTION_SUPPORTED
+ png_byte options; /* On/off state (up to 4 options) */
+#endif
};
#endif /* PNGSTRUCT_H */
diff --git a/drivers/png/pngtrans.c b/drivers/png/pngtrans.c
index 6a6908dcd2..a5df5afe00 100644
--- a/drivers/png/pngtrans.c
+++ b/drivers/png/pngtrans.c
@@ -1,8 +1,8 @@
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
*
- * Last changed in libpng 1.5.4 [July 7, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.19 [August 21, 2014]
+ * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -452,7 +452,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
{
if (row_info->bit_depth == 8)
{
- if (at_start) /* Skip initial filler */
+ if (at_start != 0) /* Skip initial filler */
++sp;
else /* Skip initial channel and, for sp, the filler */
sp += 2, ++dp;
@@ -466,7 +466,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
else if (row_info->bit_depth == 16)
{
- if (at_start) /* Skip initial filler */
+ if (at_start != 0) /* Skip initial filler */
sp += 2;
else /* Skip initial channel and, for sp, the filler */
sp += 4, dp += 2;
@@ -492,7 +492,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
{
if (row_info->bit_depth == 8)
{
- if (at_start) /* Skip initial filler */
+ if (at_start != 0) /* Skip initial filler */
++sp;
else /* Skip initial channels and, for sp, the filler */
sp += 4, dp += 3;
@@ -506,7 +506,7 @@ png_do_strip_channel(png_row_infop row_info, png_bytep row, int at_start)
else if (row_info->bit_depth == 16)
{
- if (at_start) /* Skip initial filler */
+ if (at_start != 0) /* Skip initial filler */
sp += 2;
else /* Skip initial channels and, for sp, the filler */
sp += 8, dp += 6;
@@ -619,6 +619,109 @@ png_do_bgr(png_row_infop row_info, png_bytep row)
}
#endif /* PNG_READ_BGR_SUPPORTED or PNG_WRITE_BGR_SUPPORTED */
+#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \
+ defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
+/* Added at libpng-1.5.10 */
+void /* PRIVATE */
+png_do_check_palette_indexes(png_structp png_ptr, png_row_infop row_info)
+{
+ if (png_ptr->num_palette < (1 << row_info->bit_depth) &&
+ png_ptr->num_palette > 0) /* num_palette can be 0 in MNG files */
+ {
+ /* Calculations moved outside switch in an attempt to stop different
+ * compiler warnings. 'padding' is in *bits* within the last byte, it is
+ * an 'int' because pixel_depth becomes an 'int' in the expression below,
+ * and this calculation is used because it avoids warnings that other
+ * forms produced on either GCC or MSVC.
+ */
+ int padding = (-row_info->pixel_depth * row_info->width) & 7;
+ png_bytep rp = png_ptr->row_buf + row_info->rowbytes;
+
+ switch (row_info->bit_depth)
+ {
+ case 1:
+ {
+ /* in this case, all bytes must be 0 so we don't need
+ * to unpack the pixels except for the rightmost one.
+ */
+ for (; rp > png_ptr->row_buf; rp--)
+ {
+ if (*rp >> padding != 0)
+ png_ptr->num_palette_max = 1;
+ padding = 0;
+ }
+
+ break;
+ }
+
+ case 2:
+ {
+ for (; rp > png_ptr->row_buf; rp--)
+ {
+ int i = ((*rp >> padding) & 0x03);
+
+ if (i > png_ptr->num_palette_max)
+ png_ptr->num_palette_max = i;
+
+ i = (((*rp >> padding) >> 2) & 0x03);
+
+ if (i > png_ptr->num_palette_max)
+ png_ptr->num_palette_max = i;
+
+ i = (((*rp >> padding) >> 4) & 0x03);
+
+ if (i > png_ptr->num_palette_max)
+ png_ptr->num_palette_max = i;
+
+ i = (((*rp >> padding) >> 6) & 0x03);
+
+ if (i > png_ptr->num_palette_max)
+ png_ptr->num_palette_max = i;
+
+ padding = 0;
+ }
+
+ break;
+ }
+
+ case 4:
+ {
+ for (; rp > png_ptr->row_buf; rp--)
+ {
+ int i = ((*rp >> padding) & 0x0f);
+
+ if (i > png_ptr->num_palette_max)
+ png_ptr->num_palette_max = i;
+
+ i = (((*rp >> padding) >> 4) & 0x0f);
+
+ if (i > png_ptr->num_palette_max)
+ png_ptr->num_palette_max = i;
+
+ padding = 0;
+ }
+
+ break;
+ }
+
+ case 8:
+ {
+ for (; rp > png_ptr->row_buf; rp--)
+ {
+ if (*rp > png_ptr->num_palette_max)
+ png_ptr->num_palette_max = (int) *rp;
+ }
+
+ break;
+ }
+
+ default:
+ break;
+ }
+ }
+}
+#endif /* PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED */
+
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
diff --git a/drivers/png/pngwio.c b/drivers/png/pngwio.c
index 95ffb3429f..cc55521452 100644
--- a/drivers/png/pngwio.c
+++ b/drivers/png/pngwio.c
@@ -1,8 +1,8 @@
/* pngwio.c - functions for data output
*
- * Last changed in libpng 1.5.0 [January 6, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.18 [February 6, 2014]
+ * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -207,6 +207,8 @@ png_set_write_fn(png_structp png_ptr, png_voidp io_ptr,
# else
png_ptr->output_flush_fn = output_flush_fn;
# endif
+#else
+ PNG_UNUSED(output_flush_fn)
#endif /* PNG_WRITE_FLUSH_SUPPORTED */
/* It is an error to read while writing a png file */
diff --git a/drivers/png/pngwrite.c b/drivers/png/pngwrite.c
index 6d3fd4c386..776c23603a 100644
--- a/drivers/png/pngwrite.c
+++ b/drivers/png/pngwrite.c
@@ -1,8 +1,8 @@
/* pngwrite.c - general routines to write a PNG file
*
- * Last changed in libpng 1.5.7 [December 15, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.23 [July 23, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -34,85 +34,87 @@ png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr)
if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE))
{
- /* Write PNG signature */
- png_write_sig(png_ptr);
+ /* Write PNG signature */
+ png_write_sig(png_ptr);
#ifdef PNG_MNG_FEATURES_SUPPORTED
- if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
- (png_ptr->mng_features_permitted))
- {
- png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
- png_ptr->mng_features_permitted = 0;
- }
+ if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) && \
+ (png_ptr->mng_features_permitted))
+ {
+ png_warning(png_ptr,
+ "MNG features are not allowed in a PNG datastream");
+ png_ptr->mng_features_permitted = 0;
+ }
#endif
- /* Write IHDR information. */
- png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
- info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type,
- info_ptr->filter_type,
+ /* Write IHDR information. */
+ png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height,
+ info_ptr->bit_depth, info_ptr->color_type,
+ info_ptr->compression_type, info_ptr->filter_type,
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
- info_ptr->interlace_type);
+ info_ptr->interlace_type
#else
- 0);
+ 0
#endif
- /* The rest of these check to see if the valid field has the appropriate
- * flag set, and if it does, writes the chunk.
- */
+ );
+ /* The rest of these check to see if the valid field has the appropriate
+ * flag set, and if it does, writes the chunk.
+ */
#ifdef PNG_WRITE_gAMA_SUPPORTED
- if (info_ptr->valid & PNG_INFO_gAMA)
- png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
+ if (info_ptr->valid & PNG_INFO_gAMA)
+ png_write_gAMA_fixed(png_ptr, info_ptr->gamma);
#endif
#ifdef PNG_WRITE_sRGB_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sRGB)
- png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
+ if (info_ptr->valid & PNG_INFO_sRGB)
+ png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent);
#endif
#ifdef PNG_WRITE_iCCP_SUPPORTED
- if (info_ptr->valid & PNG_INFO_iCCP)
- png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
- (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
+ if (info_ptr->valid & PNG_INFO_iCCP)
+ png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE,
+ (png_charp)info_ptr->iccp_profile, (int)info_ptr->iccp_proflen);
#endif
#ifdef PNG_WRITE_sBIT_SUPPORTED
- if (info_ptr->valid & PNG_INFO_sBIT)
- png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
+ if (info_ptr->valid & PNG_INFO_sBIT)
+ png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type);
#endif
#ifdef PNG_WRITE_cHRM_SUPPORTED
- if (info_ptr->valid & PNG_INFO_cHRM)
- png_write_cHRM_fixed(png_ptr,
- info_ptr->x_white, info_ptr->y_white,
- info_ptr->x_red, info_ptr->y_red,
- info_ptr->x_green, info_ptr->y_green,
- info_ptr->x_blue, info_ptr->y_blue);
+ if (info_ptr->valid & PNG_INFO_cHRM)
+ png_write_cHRM_fixed(png_ptr,
+ info_ptr->x_white, info_ptr->y_white,
+ info_ptr->x_red, info_ptr->y_red,
+ info_ptr->x_green, info_ptr->y_green,
+ info_ptr->x_blue, info_ptr->y_blue);
#endif
#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
- if (info_ptr->unknown_chunks_num)
- {
- png_unknown_chunk *up;
-
- png_debug(5, "writing extra chunks");
-
- for (up = info_ptr->unknown_chunks;
- up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
- up++)
+ if (info_ptr->unknown_chunks_num)
{
- int keep = png_handle_as_unknown(png_ptr, up->name);
+ png_unknown_chunk *up;
- if (keep != PNG_HANDLE_CHUNK_NEVER &&
- up->location &&
- !(up->location & PNG_HAVE_PLTE) &&
- !(up->location & PNG_HAVE_IDAT) &&
- !(up->location & PNG_AFTER_IDAT) &&
- ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
- (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ png_debug(5, "writing extra chunks");
+
+ for (up = info_ptr->unknown_chunks;
+ up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num;
+ up++)
{
- if (up->size == 0)
- png_warning(png_ptr, "Writing zero-length unknown chunk");
+ int keep = png_handle_as_unknown(png_ptr, up->name);
+
+ if (keep != PNG_HANDLE_CHUNK_NEVER &&
+ up->location &&
+ !(up->location & PNG_HAVE_PLTE) &&
+ !(up->location & PNG_HAVE_IDAT) &&
+ !(up->location & PNG_AFTER_IDAT) &&
+ ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS ||
+ (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS)))
+ {
+ if (up->size == 0)
+ png_warning(png_ptr, "Writing zero-length unknown chunk");
- png_write_chunk(png_ptr, up->name, up->data, up->size);
+ png_write_chunk(png_ptr, up->name, up->data, up->size);
+ }
}
}
- }
#endif
png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE;
}
@@ -223,11 +225,14 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].lang,
info_ptr->text[i].lang_key,
info_ptr->text[i].text);
+ /* Mark this chunk as written */
+ if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
+ else
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
#else
- png_warning(png_ptr, "Unable to write international text");
+ png_warning(png_ptr, "Unable to write international text");
#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
}
/* If we want a compressed text chunk */
@@ -238,11 +243,11 @@ png_write_info(png_structp png_ptr, png_infop info_ptr)
png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
#else
png_warning(png_ptr, "Unable to write compressed text");
#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
}
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
@@ -305,6 +310,11 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
if (!(png_ptr->mode & PNG_HAVE_IDAT))
png_error(png_ptr, "No IDATs written into file");
+#ifdef PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
+ if (png_ptr->num_palette_max > png_ptr->num_palette)
+ png_benign_error(png_ptr, "Wrote palette index exceeding num_palette");
+#endif
+
/* See if user wants us to write information chunks */
if (info_ptr != NULL)
{
@@ -335,11 +345,11 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
info_ptr->text[i].lang,
info_ptr->text[i].lang_key,
info_ptr->text[i].text);
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
#else
png_warning(png_ptr, "Unable to write international text");
#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
}
else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt)
@@ -349,11 +359,11 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
png_write_zTXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0,
info_ptr->text[i].compression);
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
#else
png_warning(png_ptr, "Unable to write compressed text");
#endif
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR;
}
else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE)
@@ -362,12 +372,11 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
/* Write uncompressed chunk */
png_write_tEXt(png_ptr, info_ptr->text[i].key,
info_ptr->text[i].text, 0);
+ /* Mark this chunk as written */
+ info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
#else
png_warning(png_ptr, "Unable to write uncompressed text");
#endif
-
- /* Mark this chunk as written */
- info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR;
}
}
#endif
@@ -415,7 +424,6 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
}
#ifdef PNG_CONVERT_tIME_SUPPORTED
-/* "tm" structure is not supported on WindowsCE */
void PNGAPI
png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime)
{
@@ -451,9 +459,6 @@ png_create_write_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
warn_fn, NULL, NULL, NULL));
}
-/* Alternate initialize png_ptr structure, and allocate any memory needed */
-static void png_reset_filter_heuristics(png_structp png_ptr); /* forward decl */
-
PNG_FUNCTION(png_structp,PNGAPI
png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
@@ -495,14 +500,13 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
*/
#ifdef USE_FAR_KEYWORD
if (setjmp(tmp_jmpbuf))
+ png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
+ PNG_ABORT();
#else
if (setjmp(png_jmpbuf(png_ptr))) /* sets longjmp to match setjmp */
-#endif
-#ifdef USE_FAR_KEYWORD
- png_memcpy(png_jmpbuf(png_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
-#endif
PNG_ABORT();
#endif
+#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
@@ -515,7 +519,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
/* Initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
- if (!png_cleanup_needed)
+ if (png_cleanup_needed == 0)
{
png_ptr->zbuf = (png_bytep)png_malloc_warn(png_ptr,
png_ptr->zbuf_size);
@@ -523,7 +527,7 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_cleanup_needed = 1;
}
- if (png_cleanup_needed)
+ if (png_cleanup_needed != 0)
{
/* Clean up PNG structure and deallocate any memory. */
png_free(png_ptr, png_ptr->zbuf);
@@ -539,10 +543,6 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
png_set_write_fn(png_ptr, NULL, NULL, NULL);
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_reset_filter_heuristics(png_ptr);
-#endif
-
return (png_ptr);
}
@@ -759,7 +759,7 @@ png_write_row(png_structp png_ptr, png_const_bytep row)
{
png_do_write_interlace(&row_info, png_ptr->row_buf + 1, png_ptr->pass);
/* This should always get caught above, but still ... */
- if (!(row_info.width))
+ if (row_info.width == 0)
{
png_write_finish_row(png_ptr);
return;
@@ -798,6 +798,14 @@ png_write_row(png_structp png_ptr, png_const_bytep row)
}
#endif
+/* Added at libpng-1.5.10 */
+#ifdef PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
+ /* Check for out-of-range palette index */
+ if (row_info.color_type == PNG_COLOR_TYPE_PALETTE &&
+ png_ptr->num_palette_max >= 0)
+ png_do_check_palette_indexes(png_ptr, &row_info);
+#endif
+
/* Find a filter if necessary, filter the row and write it out. */
png_write_find_filter(png_ptr, &row_info);
@@ -851,7 +859,7 @@ png_write_flush(png_structp png_ptr)
png_error(png_ptr, "zlib error");
}
- if (!(png_ptr->zstream.avail_out))
+ if ((png_ptr->zstream.avail_out) == 0)
{
/* Write the IDAT and reset the zlib output buffer */
png_write_IDAT(png_ptr, png_ptr->zbuf, png_ptr->zbuf_size);
@@ -969,13 +977,6 @@ png_write_destroy(png_structp png_ptr)
png_free(png_ptr, png_ptr->paeth_row);
#endif
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- /* Use this to save a little code space, it doesn't free the filter_costs */
- png_reset_filter_heuristics(png_ptr);
- png_free(png_ptr, png_ptr->filter_costs);
- png_free(png_ptr, png_ptr->inv_filter_costs);
-#endif
-
#ifdef PNG_SETJMP_SUPPORTED
/* Reset structure */
png_memcpy(tmp_jmp, png_ptr->longjmp_buffer, png_sizeof(jmp_buf));
@@ -1029,6 +1030,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
case 5:
case 6:
case 7: png_warning(png_ptr, "Unknown row filter for method 0");
+ /* FALL THROUGH */
#endif /* PNG_WRITE_FILTER_SUPPORTED */
case PNG_FILTER_VALUE_NONE:
png_ptr->do_filter = PNG_FILTER_NONE; break;
@@ -1065,6 +1067,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
*/
if (png_ptr->row_buf != NULL)
{
+ png_ptr->do_filter = PNG_FILTER_NONE;
#ifdef PNG_WRITE_FILTER_SUPPORTED
if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL)
{
@@ -1125,8 +1128,8 @@ png_set_filter(png_structp png_ptr, int method, int filters)
}
if (png_ptr->do_filter == PNG_NO_FILTERS)
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
png_ptr->do_filter = PNG_FILTER_NONE;
+#endif /* PNG_WRITE_FILTER_SUPPORTED */
}
}
else
@@ -1140,122 +1143,7 @@ png_set_filter(png_structp png_ptr, int method, int filters)
* filtered data going to zlib more consistent, hopefully resulting in
* better compression.
*/
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* GRR 970116 */
-/* Convenience reset API. */
-static void
-png_reset_filter_heuristics(png_structp png_ptr)
-{
- /* Clear out any old values in the 'weights' - this must be done because if
- * the app calls set_filter_heuristics multiple times with different
- * 'num_weights' values we would otherwise potentially have wrong sized
- * arrays.
- */
- png_ptr->num_prev_filters = 0;
- png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED;
- if (png_ptr->prev_filters != NULL)
- {
- png_bytep old = png_ptr->prev_filters;
- png_ptr->prev_filters = NULL;
- png_free(png_ptr, old);
- }
- if (png_ptr->filter_weights != NULL)
- {
- png_uint_16p old = png_ptr->filter_weights;
- png_ptr->filter_weights = NULL;
- png_free(png_ptr, old);
- }
-
- if (png_ptr->inv_filter_weights != NULL)
- {
- png_uint_16p old = png_ptr->inv_filter_weights;
- png_ptr->inv_filter_weights = NULL;
- png_free(png_ptr, old);
- }
-
- /* Leave the filter_costs - this array is fixed size. */
-}
-
-static int
-png_init_filter_heuristics(png_structp png_ptr, int heuristic_method,
- int num_weights)
-{
- if (png_ptr == NULL)
- return 0;
-
- /* Clear out the arrays */
- png_reset_filter_heuristics(png_ptr);
-
- /* Check arguments; the 'reset' function makes the correct settings for the
- * unweighted case, but we must handle the weight case by initializing the
- * arrays for the caller.
- */
- if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int i;
-
- if (num_weights > 0)
- {
- png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_byte) * num_weights));
-
- /* To make sure that the weighting starts out fairly */
- for (i = 0; i < num_weights; i++)
- {
- png_ptr->prev_filters[i] = 255;
- }
-
- png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
-
- png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * num_weights));
-
- for (i = 0; i < num_weights; i++)
- {
- png_ptr->inv_filter_weights[i] =
- png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
- }
-
- /* Safe to set this now */
- png_ptr->num_prev_filters = (png_byte)num_weights;
- }
-
- /* If, in the future, there are other filter methods, this would
- * need to be based on png_ptr->filter.
- */
- if (png_ptr->filter_costs == NULL)
- {
- png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
-
- png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr,
- (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST));
- }
-
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
- {
- png_ptr->inv_filter_costs[i] =
- png_ptr->filter_costs[i] = PNG_COST_FACTOR;
- }
-
- /* All the arrays are inited, safe to set this: */
- png_ptr->heuristic_method = PNG_FILTER_HEURISTIC_WEIGHTED;
-
- /* Return the 'ok' code. */
- return 1;
- }
- else if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT ||
- heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED)
- {
- return 1;
- }
- else
- {
- png_warning(png_ptr, "Unknown filter heuristic method");
- return 0;
- }
-}
-
+#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */
/* Provide floating and fixed point APIs */
#ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
@@ -1263,52 +1151,11 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int num_weights, png_const_doublep filter_weights,
png_const_doublep filter_costs)
{
- png_debug(1, "in png_set_filter_heuristics");
-
- /* The internal API allocates all the arrays and ensures that the elements of
- * those arrays are set to the default value.
- */
- if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
- return;
-
- /* If using the weighted method copy in the weights. */
- if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int i;
- for (i = 0; i < num_weights; i++)
- {
- if (filter_weights[i] <= 0.0)
- {
- png_ptr->inv_filter_weights[i] =
- png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
- }
-
- else
- {
- png_ptr->inv_filter_weights[i] =
- (png_uint_16)(PNG_WEIGHT_FACTOR*filter_weights[i]+.5);
-
- png_ptr->filter_weights[i] =
- (png_uint_16)(PNG_WEIGHT_FACTOR/filter_weights[i]+.5);
- }
- }
-
- /* Here is where we set the relative costs of the different filters. We
- * should take the desired compression level into account when setting
- * the costs, so that Paeth, for instance, has a high relative cost at low
- * compression levels, while it has a lower relative cost at higher
- * compression settings. The filter types are in order of increasing
- * relative cost, so it would be possible to do this with an algorithm.
- */
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) if (filter_costs[i] >= 1.0)
- {
- png_ptr->inv_filter_costs[i] =
- (png_uint_16)(PNG_COST_FACTOR / filter_costs[i] + .5);
-
- png_ptr->filter_costs[i] =
- (png_uint_16)(PNG_COST_FACTOR * filter_costs[i] + .5);
- }
- }
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(heuristic_method)
+ PNG_UNUSED(num_weights)
+ PNG_UNUSED(filter_weights)
+ PNG_UNUSED(filter_costs)
}
#endif /* FLOATING_POINT */
@@ -1318,67 +1165,16 @@ png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method,
int num_weights, png_const_fixed_point_p filter_weights,
png_const_fixed_point_p filter_costs)
{
- png_debug(1, "in png_set_filter_heuristics_fixed");
-
- /* The internal API allocates all the arrays and ensures that the elements of
- * those arrays are set to the default value.
- */
- if (!png_init_filter_heuristics(png_ptr, heuristic_method, num_weights))
- return;
-
- /* If using the weighted method copy in the weights. */
- if (heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int i;
- for (i = 0; i < num_weights; i++)
- {
- if (filter_weights[i] <= 0)
- {
- png_ptr->inv_filter_weights[i] =
- png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR;
- }
-
- else
- {
- png_ptr->inv_filter_weights[i] = (png_uint_16)
- ((PNG_WEIGHT_FACTOR*filter_weights[i]+PNG_FP_HALF)/PNG_FP_1);
-
- png_ptr->filter_weights[i] = (png_uint_16)((PNG_WEIGHT_FACTOR*
- PNG_FP_1+(filter_weights[i]/2))/filter_weights[i]);
- }
- }
-
- /* Here is where we set the relative costs of the different filters. We
- * should take the desired compression level into account when setting
- * the costs, so that Paeth, for instance, has a high relative cost at low
- * compression levels, while it has a lower relative cost at higher
- * compression settings. The filter types are in order of increasing
- * relative cost, so it would be possible to do this with an algorithm.
- */
- for (i = 0; i < PNG_FILTER_VALUE_LAST; i++)
- if (filter_costs[i] >= PNG_FP_1)
- {
- png_uint_32 tmp;
-
- /* Use a 32 bit unsigned temporary here because otherwise the
- * intermediate value will be a 32 bit *signed* integer (ANSI rules)
- * and this will get the wrong answer on division.
- */
- tmp = PNG_COST_FACTOR*PNG_FP_1 + (filter_costs[i]/2);
- tmp /= filter_costs[i];
-
- png_ptr->inv_filter_costs[i] = (png_uint_16)tmp;
-
- tmp = PNG_COST_FACTOR * filter_costs[i] + PNG_FP_HALF;
- tmp /= PNG_FP_1;
-
- png_ptr->filter_costs[i] = (png_uint_16)tmp;
- }
- }
+ PNG_UNUSED(png_ptr)
+ PNG_UNUSED(heuristic_method)
+ PNG_UNUSED(num_weights)
+ PNG_UNUSED(filter_weights)
+ PNG_UNUSED(filter_costs)
}
#endif /* FIXED_POINT */
-#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
+#endif /* WRITE_WEIGHTED_FILTER */
+#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
void PNGAPI
png_set_compression_level(png_structp png_ptr, int level)
{
@@ -1457,6 +1253,7 @@ png_set_compression_method(png_structp png_ptr, int method)
png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD;
png_ptr->zlib_method = method;
}
+#endif /* WRITE_CUSTOMIZE_COMPRESSION */
/* The following were added to libpng-1.5.4 */
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
@@ -1514,10 +1311,10 @@ png_set_text_compression_window_bits(png_structp png_ptr, int window_bits)
#ifndef WBITS_8_OK
/* Avoid libpng bug with 256-byte windows */
if (window_bits == 8)
- {
- png_warning(png_ptr, "Text compression window is being reset to 512");
- window_bits = 9;
- }
+ {
+ png_warning(png_ptr, "Text compression window is being reset to 512");
+ window_bits = 9;
+ }
#endif
png_ptr->flags |= PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS;
diff --git a/drivers/png/pngwtran.c b/drivers/png/pngwtran.c
index 96608efcb4..24c436ffe4 100644
--- a/drivers/png/pngwtran.c
+++ b/drivers/png/pngwtran.c
@@ -1,8 +1,8 @@
/* pngwtran.c - transforms the data in a row for PNG writers
*
- * Last changed in libpng 1.5.6 [November 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2002,2004,2006-2012 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2012 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -45,8 +45,20 @@ png_do_write_transformations(png_structp png_ptr, png_row_infop row_info)
#ifdef PNG_WRITE_FILLER_SUPPORTED
if (png_ptr->transformations & PNG_FILLER)
- png_do_strip_channel(row_info, png_ptr->row_buf + 1,
- !(png_ptr->flags & PNG_FLAG_FILLER_AFTER));
+ {
+ if (png_ptr->color_type & (PNG_COLOR_MASK_ALPHA|PNG_COLOR_MASK_PALETTE))
+ {
+ /* GA, RGBA or palette; in any of these cases libpng will not do the
+ * the correct thing (whatever that might be).
+ */
+ png_warning(png_ptr, "incorrect png_set_filler call ignored");
+ png_ptr->transformations &= ~PNG_FILLER;
+ }
+
+ else
+ png_do_strip_channel(row_info, png_ptr->row_buf + 1,
+ !(png_ptr->flags & PNG_FLAG_FILLER_AFTER));
+ }
#endif
#ifdef PNG_WRITE_PACKSWAP_SUPPORTED
diff --git a/drivers/png/pngwutil.c b/drivers/png/pngwutil.c
index da18e9502e..d5f097fb97 100644
--- a/drivers/png/pngwutil.c
+++ b/drivers/png/pngwutil.c
@@ -1,8 +1,8 @@
/* pngwutil.c - utilities to write a PNG file
*
- * Last changed in libpng 1.5.6 [November 3, 2011]
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Last changed in libpng 1.5.26 [December 17, 2015]
+ * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -30,19 +30,20 @@ png_save_uint_32(png_bytep buf, png_uint_32 i)
}
#ifdef PNG_SAVE_INT_32_SUPPORTED
-/* The png_save_int_32 function assumes integers are stored in two's
- * complement format. If this isn't the case, then this routine needs to
- * be modified to write data in two's complement format. Note that,
- * the following works correctly even if png_int_32 has more than 32 bits
- * (compare the more complex code required on read for sign extention.)
+/* PNG signed integers are saved in 32-bit 2's complement format. ANSI C-90
+ * defines a cast of a signed integer to an unsigned integer either to preserve
+ * the value, if it is positive, or to calculate:
+ *
+ * (UNSIGNED_MAX+1) + integer
+ *
+ * Where UNSIGNED_MAX is the appropriate maximum unsigned value, so when the
+ * negative integral value is added the result will be an unsigned value
+ * correspnding to the 2's complement representation.
*/
void PNGAPI
png_save_int_32(png_bytep buf, png_int_32 i)
{
- buf[0] = (png_byte)((i >> 24) & 0xff);
- buf[1] = (png_byte)((i >> 16) & 0xff);
- buf[2] = (png_byte)((i >> 8) & 0xff);
- buf[3] = (png_byte)(i & 0xff);
+ png_save_uint_32(buf, i);
}
#endif
@@ -315,6 +316,7 @@ png_zlib_release(png_structp png_ptr)
if (ret != Z_OK)
{
+#ifdef PNG_WARNINGS_SUPPORTED
png_const_charp err;
PNG_WARNING_PARAMETERS(p)
@@ -349,6 +351,7 @@ png_zlib_release(png_structp png_ptr)
png_formatted_warning(png_ptr, p,
"zlib failed to reset compressor: @1(@2): @3");
+#endif
}
}
@@ -460,24 +463,21 @@ png_text_compress(png_structp png_ptr,
old_ptr = comp->output_ptr;
comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
- (png_alloc_size_t)
- (comp->max_output_ptr * png_sizeof(png_charpp)));
+ (comp->max_output_ptr * png_sizeof(png_bytep)));
png_memcpy(comp->output_ptr, old_ptr, old_max
- * png_sizeof(png_charp));
+ * png_sizeof(png_bytep));
png_free(png_ptr, old_ptr);
}
else
comp->output_ptr = (png_bytepp)png_malloc(png_ptr,
- (png_alloc_size_t)
- (comp->max_output_ptr * png_sizeof(png_charp)));
+ (comp->max_output_ptr * png_sizeof(png_bytep)));
}
/* Save the data */
comp->output_ptr[comp->num_output_ptr] =
- (png_bytep)png_malloc(png_ptr,
- (png_alloc_size_t)png_ptr->zbuf_size);
+ (png_bytep)png_malloc(png_ptr, png_ptr->zbuf_size);
png_memcpy(comp->output_ptr[comp->num_output_ptr], png_ptr->zbuf,
png_ptr->zbuf_size);
@@ -569,14 +569,15 @@ png_text_compress(png_structp png_ptr,
/* Ship the compressed text out via chunk writes */
static void /* PRIVATE */
-png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
+png_write_compressed_data_out(png_structp png_ptr, compression_state *comp,
+ png_size_t data_len)
{
int i;
/* Handle the no-compression case */
if (comp->input)
{
- png_write_chunk_data(png_ptr, comp->input, comp->input_len);
+ png_write_chunk_data(png_ptr, comp->input, data_len);
return;
}
@@ -585,7 +586,7 @@ png_write_compressed_data_out(png_structp png_ptr, compression_state *comp)
/* The zbuf_size test is because the code below doesn't work if zbuf_size is
* '1'; simply skip it to avoid memory overwrite.
*/
- if (comp->input_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1)
+ if (data_len >= 2 && comp->input_len < 16384 && png_ptr->zbuf_size > 1)
{
unsigned int z_cmf; /* zlib compression method and flags */
@@ -825,7 +826,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr;
- if (!(png_ptr->do_filter))
+ if ((png_ptr->do_filter) == PNG_NO_FILTERS)
{
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE ||
png_ptr->bit_depth < 8)
@@ -895,17 +896,20 @@ void /* PRIVATE */
png_write_PLTE(png_structp png_ptr, png_const_colorp palette,
png_uint_32 num_pal)
{
- png_uint_32 i;
+ png_uint_32 max_palette_length, i;
png_const_colorp pal_ptr;
png_byte buf[3];
png_debug(1, "in png_write_PLTE");
+ max_palette_length = (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ?
+ (1 << png_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH;
+
if ((
#ifdef PNG_MNG_FEATURES_SUPPORTED
!(png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) &&
#endif
- num_pal == 0) || num_pal > 256)
+ num_pal == 0) || num_pal > max_palette_length)
{
if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
{
@@ -1095,7 +1099,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
png_const_charp profile, int profile_len)
{
png_size_t name_len;
- png_charp new_name;
compression_state comp;
int embedded_profile_len = 0;
@@ -1107,8 +1110,7 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
comp.input = NULL;
comp.input_len = 0;
- if ((name_len = png_check_keyword(png_ptr, name, &new_name)) == 0)
- return;
+ name_len = png_strlen(name);
if (compression_type != PNG_COMPRESSION_TYPE_BASE)
png_warning(png_ptr, "Unknown compression type in iCCP chunk");
@@ -1127,8 +1129,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
{
png_warning(png_ptr,
"Embedded profile length in iCCP chunk is negative");
-
- png_free(png_ptr, new_name);
return;
}
@@ -1136,8 +1136,6 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
{
png_warning(png_ptr,
"Embedded profile length too large in iCCP chunk");
-
- png_free(png_ptr, new_name);
return;
}
@@ -1149,7 +1147,7 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
profile_len = embedded_profile_len;
}
- if (profile_len)
+ if (profile_len != 0)
profile_len = png_text_compress(png_ptr, profile,
(png_size_t)profile_len, PNG_COMPRESSION_TYPE_BASE, &comp);
@@ -1157,19 +1155,21 @@ png_write_iCCP(png_structp png_ptr, png_const_charp name, int compression_type,
png_write_chunk_header(png_ptr, png_iCCP,
(png_uint_32)(name_len + profile_len + 2));
- new_name[name_len + 1] = 0x00;
+ png_write_chunk_data(png_ptr, (png_bytep)name, name_len);
- png_write_chunk_data(png_ptr, (png_bytep)new_name,
- (png_size_t)(name_len + 2));
+ {
+ png_byte buffer[2];
+ buffer[0] = 0; /* terminate name */
+ buffer[1] = 0xFFU & compression_type;
+ png_write_chunk_data(png_ptr, buffer, 2);
+ }
- if (profile_len)
+ if (profile_len != 0)
{
- comp.input_len = profile_len;
- png_write_compressed_data_out(png_ptr, &comp);
+ png_write_compressed_data_out(png_ptr, &comp, profile_len);
}
png_write_chunk_end(png_ptr);
- png_free(png_ptr, new_name);
}
#endif
@@ -1179,7 +1179,6 @@ void /* PRIVATE */
png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
{
png_size_t name_len;
- png_charp new_name;
png_byte entrybuf[10];
png_size_t entry_size = (spalette->depth == 8 ? 6 : 10);
png_size_t palette_size = entry_size * spalette->nentries;
@@ -1190,14 +1189,13 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
png_debug(1, "in png_write_sPLT");
- if ((name_len = png_check_keyword(png_ptr,spalette->name, &new_name))==0)
- return;
+ name_len = png_strlen(spalette->name);
/* Make sure we include the NULL after the name */
png_write_chunk_header(png_ptr, png_sPLT,
(png_uint_32)(name_len + 2 + palette_size));
- png_write_chunk_data(png_ptr, (png_bytep)new_name,
+ png_write_chunk_data(png_ptr, (png_bytep)spalette->name,
(png_size_t)(name_len + 1));
png_write_chunk_data(png_ptr, &spalette->depth, (png_size_t)1);
@@ -1253,7 +1251,6 @@ png_write_sPLT(png_structp png_ptr, png_const_sPLT_tp spalette)
#endif
png_write_chunk_end(png_ptr);
- png_free(png_ptr, new_name);
}
#endif
@@ -1370,7 +1367,8 @@ png_write_tRNS(png_structp png_ptr, png_const_bytep trans_alpha,
}
/* Write the chunk out as it is */
- png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha, (png_size_t)num_trans);
+ png_write_complete_chunk(png_ptr, png_tRNS, trans_alpha,
+ (png_size_t)num_trans);
}
else if (color_type == PNG_COLOR_TYPE_GRAY)
@@ -1508,138 +1506,6 @@ png_write_hIST(png_structp png_ptr, png_const_uint_16p hist, int num_hist)
}
#endif
-#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
- defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
-/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification,
- * and if invalid, correct the keyword rather than discarding the entire
- * chunk. The PNG 1.0 specification requires keywords 1-79 characters in
- * length, forbids leading or trailing whitespace, multiple internal spaces,
- * and the non-break space (0x80) from ISO 8859-1. Returns keyword length.
- *
- * The new_key is allocated to hold the corrected keyword and must be freed
- * by the calling routine. This avoids problems with trying to write to
- * static keywords without having to have duplicate copies of the strings.
- */
-png_size_t /* PRIVATE */
-png_check_keyword(png_structp png_ptr, png_const_charp key, png_charpp new_key)
-{
- png_size_t key_len;
- png_const_charp ikp;
- png_charp kp, dp;
- int kflag;
- int kwarn=0;
-
- png_debug(1, "in png_check_keyword");
-
- *new_key = NULL;
-
- if (key == NULL || (key_len = png_strlen(key)) == 0)
- {
- png_warning(png_ptr, "zero length keyword");
- return ((png_size_t)0);
- }
-
- png_debug1(2, "Keyword to be checked is '%s'", key);
-
- *new_key = (png_charp)png_malloc_warn(png_ptr, (png_uint_32)(key_len + 2));
-
- if (*new_key == NULL)
- {
- png_warning(png_ptr, "Out of memory while procesing keyword");
- return ((png_size_t)0);
- }
-
- /* Replace non-printing characters with a blank and print a warning */
- for (ikp = key, dp = *new_key; *ikp != '\0'; ikp++, dp++)
- {
- if ((png_byte)*ikp < 0x20 ||
- ((png_byte)*ikp > 0x7E && (png_byte)*ikp < 0xA1))
- {
- PNG_WARNING_PARAMETERS(p)
-
- png_warning_parameter_unsigned(p, 1, PNG_NUMBER_FORMAT_02x,
- (png_byte)*ikp);
- png_formatted_warning(png_ptr, p, "invalid keyword character 0x@1");
- *dp = ' ';
- }
-
- else
- {
- *dp = *ikp;
- }
- }
- *dp = '\0';
-
- /* Remove any trailing white space. */
- kp = *new_key + key_len - 1;
- if (*kp == ' ')
- {
- png_warning(png_ptr, "trailing spaces removed from keyword");
-
- while (*kp == ' ')
- {
- *(kp--) = '\0';
- key_len--;
- }
- }
-
- /* Remove any leading white space. */
- kp = *new_key;
- if (*kp == ' ')
- {
- png_warning(png_ptr, "leading spaces removed from keyword");
-
- while (*kp == ' ')
- {
- kp++;
- key_len--;
- }
- }
-
- png_debug1(2, "Checking for multiple internal spaces in '%s'", kp);
-
- /* Remove multiple internal spaces. */
- for (kflag = 0, dp = *new_key; *kp != '\0'; kp++)
- {
- if (*kp == ' ' && kflag == 0)
- {
- *(dp++) = *kp;
- kflag = 1;
- }
-
- else if (*kp == ' ')
- {
- key_len--;
- kwarn = 1;
- }
-
- else
- {
- *(dp++) = *kp;
- kflag = 0;
- }
- }
- *dp = '\0';
- if (kwarn)
- png_warning(png_ptr, "extra interior spaces removed from keyword");
-
- if (key_len == 0)
- {
- png_free(png_ptr, *new_key);
- png_warning(png_ptr, "Zero length keyword");
- }
-
- if (key_len > 79)
- {
- png_warning(png_ptr, "keyword length must be 1 - 79 characters");
- (*new_key)[79] = '\0';
- key_len = 79;
- }
-
- return (key_len);
-}
-#endif
-
#ifdef PNG_WRITE_tEXt_SUPPORTED
/* Write a tEXt chunk */
void /* PRIVATE */
@@ -1647,12 +1513,10 @@ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
png_size_t text_len)
{
png_size_t key_len;
- png_charp new_key;
png_debug(1, "in png_write_tEXt");
- if ((key_len = png_check_keyword(png_ptr, key, &new_key))==0)
- return;
+ key_len = strlen(key);
if (text == NULL || *text == '\0')
text_len = 0;
@@ -1669,15 +1533,14 @@ png_write_tEXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
* any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
* The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
*/
- png_write_chunk_data(png_ptr, (png_bytep)new_key,
+ png_write_chunk_data(png_ptr, (png_bytep)key,
(png_size_t)(key_len + 1));
- if (text_len)
+ if (text_len != 0)
png_write_chunk_data(png_ptr, (png_const_bytep)text,
(png_size_t)text_len);
png_write_chunk_end(png_ptr);
- png_free(png_ptr, new_key);
}
#endif
@@ -1689,7 +1552,6 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
{
png_size_t key_len;
png_byte buf;
- png_charp new_key;
compression_state comp;
png_debug(1, "in png_write_zTXt");
@@ -1700,16 +1562,11 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
comp.input = NULL;
comp.input_len = 0;
- if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
- {
- png_free(png_ptr, new_key);
- return;
- }
+ key_len = strlen(key);
if (text == NULL || *text == '\0' || compression==PNG_TEXT_COMPRESSION_NONE)
{
- png_write_tEXt(png_ptr, new_key, text, (png_size_t)0);
- png_free(png_ptr, new_key);
+ png_write_tEXt(png_ptr, key, text, (png_size_t)0);
return;
}
@@ -1724,19 +1581,16 @@ png_write_zTXt(png_structp png_ptr, png_const_charp key, png_const_charp text,
(png_uint_32)(key_len+text_len + 2));
/* Write key */
- png_write_chunk_data(png_ptr, (png_bytep)new_key,
+ png_write_chunk_data(png_ptr, (png_bytep)key,
(png_size_t)(key_len + 1));
- png_free(png_ptr, new_key);
-
buf = (png_byte)compression;
/* Write compression */
png_write_chunk_data(png_ptr, &buf, (png_size_t)1);
/* Write the compressed data */
- comp.input_len = text_len;
- png_write_compressed_data_out(png_ptr, &comp);
+ png_write_compressed_data_out(png_ptr, &comp, text_len);
/* Close the chunk */
png_write_chunk_end(png_ptr);
@@ -1750,8 +1604,6 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
png_const_charp lang, png_const_charp lang_key, png_const_charp text)
{
png_size_t lang_len, key_len, lang_key_len, text_len;
- png_charp new_lang;
- png_charp new_key = NULL;
png_byte cbuf[2];
compression_state comp;
@@ -1762,15 +1614,13 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
comp.output_ptr = NULL;
comp.input = NULL;
- if ((key_len = png_check_keyword(png_ptr, key, &new_key)) == 0)
- return;
+ key_len = png_strlen(key);
- if ((lang_len = png_check_keyword(png_ptr, lang, &new_lang)) == 0)
- {
- png_warning(png_ptr, "Empty language field in iTXt chunk");
- new_lang = NULL;
+ if (lang == NULL)
lang_len = 0;
- }
+
+ else
+ lang_len = png_strlen(lang);
if (lang_key == NULL)
lang_key_len = 0;
@@ -1805,7 +1655,7 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
* any non-Latin-1 characters except for NEWLINE. ISO PNG will forbid them.
* The NUL character is forbidden by PNG-1.0 through PNG-1.2 and ISO PNG.
*/
- png_write_chunk_data(png_ptr, (png_bytep)new_key, (png_size_t)(key_len + 1));
+ png_write_chunk_data(png_ptr, (png_bytep)key, (png_size_t)(key_len + 1));
/* Set the compression flag */
if (compression == PNG_ITXT_COMPRESSION_NONE ||
@@ -1821,18 +1671,15 @@ png_write_iTXt(png_structp png_ptr, int compression, png_const_charp key,
png_write_chunk_data(png_ptr, cbuf, (png_size_t)2);
cbuf[0] = 0;
- png_write_chunk_data(png_ptr, (new_lang ? (png_const_bytep)new_lang : cbuf),
+ png_write_chunk_data(png_ptr, (lang ? (png_const_bytep)lang : cbuf),
(png_size_t)(lang_len + 1));
png_write_chunk_data(png_ptr, (lang_key ? (png_const_bytep)lang_key : cbuf),
(png_size_t)(lang_key_len + 1));
- png_write_compressed_data_out(png_ptr, &comp);
+ png_write_compressed_data_out(png_ptr, &comp, text_len);
png_write_chunk_end(png_ptr);
-
- png_free(png_ptr, new_key);
- png_free(png_ptr, new_lang);
}
#endif
@@ -1866,7 +1713,6 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_size_t purpose_len, units_len, total_len;
png_size_tp params_len;
png_byte buf[10];
- png_charp new_purpose;
int i;
png_debug1(1, "in png_write_pCAL (%d parameters)", nparams);
@@ -1874,7 +1720,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
if (type >= PNG_EQUATION_LAST)
png_warning(png_ptr, "Unrecognized equation type for pCAL chunk");
- purpose_len = png_check_keyword(png_ptr, purpose, &new_purpose) + 1;
+ purpose_len = strlen(purpose) + 1;
png_debug1(3, "pCAL purpose length = %d", (int)purpose_len);
units_len = png_strlen(units) + (nparams == 0 ? 0 : 1);
png_debug1(3, "pCAL units length = %d", (int)units_len);
@@ -1896,7 +1742,7 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_debug1(3, "pCAL total length = %d", (int)total_len);
png_write_chunk_header(png_ptr, png_pCAL, (png_uint_32)total_len);
- png_write_chunk_data(png_ptr, (png_const_bytep)new_purpose, purpose_len);
+ png_write_chunk_data(png_ptr, (png_const_bytep)purpose, purpose_len);
png_save_int_32(buf, X0);
png_save_int_32(buf + 4, X1);
buf[8] = (png_byte)type;
@@ -1904,8 +1750,6 @@ png_write_pCAL(png_structp png_ptr, png_charp purpose, png_int_32 X0,
png_write_chunk_data(png_ptr, buf, (png_size_t)10);
png_write_chunk_data(png_ptr, (png_const_bytep)units, (png_size_t)units_len);
- png_free(png_ptr, new_purpose);
-
for (i = 0; i < nparams; i++)
{
png_write_chunk_data(png_ptr, (png_const_bytep)params[i], params_len[i]);
@@ -2430,20 +2274,9 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_uint_32 mins, bpp;
png_byte filter_to_do = png_ptr->do_filter;
png_size_t row_bytes = row_info->rowbytes;
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- int num_p_filters = png_ptr->num_prev_filters;
-#endif
png_debug(1, "in png_write_find_filter");
-#ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS)
- {
- /* These will never be selected so we need not test them. */
- filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH);
- }
-#endif
-
/* Find out how many bytes offset each pixel is */
bpp = (row_info->pixel_depth + 7) >> 3;
@@ -2495,44 +2328,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
sum += (v < 128) ? v : 256 - v;
}
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- png_uint_32 sumhi, sumlo;
- int j;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK; /* Gives us some footroom */
-
- /* Reduce the sum if we match any of the previous rows */
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- /* Factor in the cost of this filter (this is here for completeness,
- * but it makes no sense to have a "cost" for the NONE filter, as
- * it has the minimum possible computational cost - none).
- */
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_NONE]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
mins = sum;
}
@@ -2565,44 +2360,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i;
int v;
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- /* We temporarily increase the "minimum sum" by the factor we
- * would reduce the sum of this filter, so that we can do the
- * early exit comparison without scaling the sum each time.
- */
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
for (i = 0, rp = row_buf + 1, dp = png_ptr->sub_row + 1; i < bpp;
i++, rp++, dp++)
{
@@ -2622,40 +2379,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break;
}
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_SUB)
- {
- sumlo = (sumlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_SUB]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
if (sum < mins)
{
mins = sum;
@@ -2686,41 +2409,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i;
int v;
-
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
for (i = 0, rp = row_buf + 1, dp = png_ptr->up_row + 1,
pp = prev_row + 1; i < row_bytes; i++)
{
@@ -2732,40 +2420,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break;
}
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_UP)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_UP]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
if (sum < mins)
{
mins = sum;
@@ -2800,40 +2454,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i;
int v;
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_AVG)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
for (i = 0, rp = row_buf + 1, dp = png_ptr->avg_row + 1,
pp = prev_row + 1; i < bpp; i++)
{
@@ -2853,40 +2473,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break;
}
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_NONE)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_AVG]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
if (sum < mins)
{
mins = sum;
@@ -2941,40 +2527,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
png_size_t i;
int v;
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 lmhi, lmlo;
- lmlo = lmins & PNG_LOMASK;
- lmhi = (lmins >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
- {
- lmlo = (lmlo * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- lmlo = (lmlo * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- lmhi = (lmhi * png_ptr->inv_filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- if (lmhi > PNG_HIMASK)
- lmins = PNG_MAXSUM;
-
- else
- lmins = (lmhi << PNG_HISHIFT) + lmlo;
- }
-#endif
-
for (i = 0, rp = row_buf + 1, dp = png_ptr->paeth_row + 1,
pp = prev_row + 1; i < bpp; i++)
{
@@ -3028,40 +2580,6 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
break;
}
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- if (png_ptr->heuristic_method == PNG_FILTER_HEURISTIC_WEIGHTED)
- {
- int j;
- png_uint_32 sumhi, sumlo;
- sumlo = sum & PNG_LOMASK;
- sumhi = (sum >> PNG_HISHIFT) & PNG_HIMASK;
-
- for (j = 0; j < num_p_filters; j++)
- {
- if (png_ptr->prev_filters[j] == PNG_FILTER_VALUE_PAETH)
- {
- sumlo = (sumlo * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_weights[j]) >>
- PNG_WEIGHT_SHIFT;
- }
- }
-
- sumlo = (sumlo * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- sumhi = (sumhi * png_ptr->filter_costs[PNG_FILTER_VALUE_PAETH]) >>
- PNG_COST_SHIFT;
-
- if (sumhi > PNG_HIMASK)
- sum = PNG_MAXSUM;
-
- else
- sum = (sumhi << PNG_HISHIFT) + sumlo;
- }
-#endif
-
if (sum < mins)
{
best_row = png_ptr->paeth_row;
@@ -3071,26 +2589,8 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
/* Do the actual writing of the filtered row data from the chosen filter. */
png_write_filtered_row(png_ptr, best_row, row_info->rowbytes+1);
-
-#ifdef PNG_WRITE_FILTER_SUPPORTED
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- /* Save the type of filter we picked this time for future calculations */
- if (png_ptr->num_prev_filters > 0)
- {
- int j;
-
- for (j = 1; j < num_p_filters; j++)
- {
- png_ptr->prev_filters[j] = png_ptr->prev_filters[j - 1];
- }
-
- png_ptr->prev_filters[j] = best_row[0];
- }
-#endif
-#endif /* PNG_WRITE_FILTER_SUPPORTED */
}
-
/* Do the actual writing of a previously filtered row. */
static void
png_write_filtered_row(png_structp png_ptr, png_bytep filtered_row,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 04:09:16 +0000