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Diffstat (limited to 'drivers/png/pngwutil.c')
-rw-r--r--drivers/png/pngwutil.c620
1 files changed, 60 insertions, 560 deletions
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 2025-07-19 18:40:24 +0000