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path: root/thirdparty/libpng/pngpread.c
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Diffstat (limited to 'thirdparty/libpng/pngpread.c')
-rw-r--r--thirdparty/libpng/pngpread.c199
1 files changed, 0 insertions, 199 deletions
diff --git a/thirdparty/libpng/pngpread.c b/thirdparty/libpng/pngpread.c
index 2eaeca08f7..e283627b77 100644
--- a/thirdparty/libpng/pngpread.c
+++ b/thirdparty/libpng/pngpread.c
@@ -195,106 +195,6 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
chunk_name = png_ptr->chunk_name;
-#ifdef PNG_READ_APNG_SUPPORTED
- if (png_ptr->num_frames_read > 0 &&
- png_ptr->num_frames_read < info_ptr->num_frames)
- {
- if (chunk_name == png_IDAT)
- {
- /* Discard trailing IDATs for the first frame */
- if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1)
- png_error(png_ptr, "out of place IDAT");
-
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
- return;
- }
- else if (chunk_name == png_fdAT)
- {
- if (png_ptr->buffer_size < 4)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_ensure_sequence_number(png_ptr, 4);
-
- if (!(png_ptr->mode & PNG_HAVE_fcTL))
- {
- /* Discard trailing fdATs for frames other than the first */
- if (png_ptr->num_frames_read < 2)
- png_error(png_ptr, "out of place fdAT");
-
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
- return;
- }
-
- else
- {
- /* frame data follows */
- png_ptr->idat_size = png_ptr->push_length - 4;
- png_ptr->mode |= PNG_HAVE_IDAT;
- png_ptr->process_mode = PNG_READ_IDAT_MODE;
-
- return;
- }
- }
-
- else if (chunk_name == png_fcTL)
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_read_reset(png_ptr);
- png_ptr->mode &= ~PNG_HAVE_fcTL;
-
- png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
-
- if (!(png_ptr->mode & PNG_HAVE_fcTL))
- png_error(png_ptr, "missing required fcTL chunk");
-
- png_read_reinit(png_ptr, info_ptr);
- png_progressive_read_reset(png_ptr);
-
- if (png_ptr->frame_info_fn != NULL)
- (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read);
-
- png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-
- return;
- }
-
- else
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
- png_warning(png_ptr, "Skipped (ignored) a chunk "
- "between APNG chunks");
- png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
- return;
- }
-
- return;
- }
-#endif /* PNG_READ_APNG_SUPPORTED */
-
if (chunk_name == png_IDAT)
{
if ((png_ptr->mode & PNG_AFTER_IDAT) != 0)
@@ -361,9 +261,6 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
else if (chunk_name == png_IDAT)
{
-#ifdef PNG_READ_APNG_SUPPORTED
- png_have_info(png_ptr, info_ptr);
-#endif
png_ptr->idat_size = png_ptr->push_length;
png_ptr->process_mode = PNG_READ_IDAT_MODE;
png_push_have_info(png_ptr, info_ptr);
@@ -509,30 +406,6 @@ png_push_read_chunk(png_structrp png_ptr, png_inforp info_ptr)
png_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
}
#endif
-#ifdef PNG_READ_APNG_SUPPORTED
- else if (chunk_name == png_acTL)
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length);
- }
-
- else if (chunk_name == png_fcTL)
- {
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
-
- png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
- }
-
-#endif /* PNG_READ_APNG_SUPPORTED */
else
{
@@ -666,11 +539,7 @@ png_push_read_IDAT(png_structrp png_ptr)
png_byte chunk_tag[4];
/* TODO: this code can be commoned up with the same code in push_read */
-#ifdef PNG_READ_APNG_SUPPORTED
- PNG_PUSH_SAVE_BUFFER_IF_LT(12)
-#else
PNG_PUSH_SAVE_BUFFER_IF_LT(8)
-#endif
png_push_fill_buffer(png_ptr, chunk_length, 4);
png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length);
png_reset_crc(png_ptr);
@@ -678,64 +547,17 @@ png_push_read_IDAT(png_structrp png_ptr)
png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag);
png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
-#ifdef PNG_READ_APNG_SUPPORTED
- if (png_ptr->chunk_name != png_fdAT && png_ptr->num_frames_read > 0)
- {
- if (png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED)
- {
- png_ptr->process_mode = PNG_READ_CHUNK_MODE;
- if (png_ptr->frame_end_fn != NULL)
- (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
- png_ptr->num_frames_read++;
- return;
- }
- else
- {
- if (png_ptr->chunk_name == png_IEND)
- png_error(png_ptr, "Not enough image data");
- if (png_ptr->push_length + 4 > png_ptr->buffer_size)
- {
- png_push_save_buffer(png_ptr);
- return;
- }
- png_warning(png_ptr, "Skipping (ignoring) a chunk between "
- "APNG chunks");
- png_crc_finish(png_ptr, png_ptr->push_length);
- png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
- return;
- }
- }
- else
-#endif
-#ifdef PNG_READ_APNG_SUPPORTED
- if (png_ptr->chunk_name != png_IDAT && png_ptr->num_frames_read == 0)
-#else
if (png_ptr->chunk_name != png_IDAT)
-#endif
{
png_ptr->process_mode = PNG_READ_CHUNK_MODE;
if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0)
png_error(png_ptr, "Not enough compressed data");
-#ifdef PNG_READ_APNG_SUPPORTED
- if (png_ptr->frame_end_fn != NULL)
- (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
- png_ptr->num_frames_read++;
-#endif
-
return;
}
png_ptr->idat_size = png_ptr->push_length;
-
-#ifdef PNG_READ_APNG_SUPPORTED
- if (png_ptr->num_frames_read > 0)
- {
- png_ensure_sequence_number(png_ptr, 4);
- png_ptr->idat_size -= 4;
- }
-#endif
}
if (png_ptr->idat_size != 0 && png_ptr->save_buffer_size != 0)
@@ -809,15 +631,6 @@ png_process_IDAT_data(png_structrp png_ptr, png_bytep buffer,
if (!(buffer_length > 0) || buffer == NULL)
png_error(png_ptr, "No IDAT data (internal error)");
-#ifdef PNG_READ_APNG_SUPPORTED
- /* If the app is not APNG-aware, decode only the first frame */
- if (!(png_ptr->apng_flags & PNG_APNG_APP) && png_ptr->num_frames_read > 0)
- {
- png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED;
- return;
- }
-#endif
-
/* This routine must process all the data it has been given
* before returning, calling the row callback as required to
* handle the uncompressed results.
@@ -1272,18 +1085,6 @@ png_set_progressive_read_fn(png_structrp png_ptr, png_voidp progressive_ptr,
png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
}
-#ifdef PNG_READ_APNG_SUPPORTED
-void PNGAPI
-png_set_progressive_frame_fn(png_structp png_ptr,
- png_progressive_frame_ptr frame_info_fn,
- png_progressive_frame_ptr frame_end_fn)
-{
- png_ptr->frame_info_fn = frame_info_fn;
- png_ptr->frame_end_fn = frame_end_fn;
- png_ptr->apng_flags |= PNG_APNG_APP;
-}
-#endif
-
png_voidp PNGAPI
png_get_progressive_ptr(png_const_structrp png_ptr)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 10:30:14 +0000