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libpng: Update to upstream 1.6.38

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(cherry picked from commit 0f2dc5c5e1)
This commit is contained in:
Rémi Verschelde
2022-09-16 21:09:44 +02:00
parent 5c81213231
commit 00e686b8c1
20 changed files with 129 additions and 1376 deletions
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159
thirdparty/libpng/pngset.c vendored
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@@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 2018-2022 Cosmin Truta
* Copyright (c) 1998-2018 Glenn Randers-Pehrson
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
@@ -288,11 +288,6 @@ png_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr,
info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
#ifdef PNG_APNG_SUPPORTED
/* for non-animated png. this may be overwritten from an acTL chunk later */
info_ptr->num_frames = 1;
#endif
}
#ifdef PNG_oFFs_SUPPORTED
@@ -1024,6 +1019,9 @@ png_set_tRNS(png_structrp png_ptr, png_inforp info_ptr,
info_ptr->trans_alpha = png_voidcast(png_bytep,
png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH));
memcpy(info_ptr->trans_alpha, trans_alpha, (size_t)num_trans);
info_ptr->valid |= PNG_INFO_tRNS;
info_ptr->free_me |= PNG_FREE_TRNS;
}
png_ptr->trans_alpha = info_ptr->trans_alpha;
}
@@ -1163,147 +1161,6 @@ png_set_sPLT(png_const_structrp png_ptr,
}
#endif /* sPLT */
#ifdef PNG_APNG_SUPPORTED
png_uint_32 PNGAPI
png_set_acTL(png_structp png_ptr, png_infop info_ptr,
png_uint_32 num_frames, png_uint_32 num_plays)
{
png_debug1(1, "in %s storage function", "acTL");
if (png_ptr == NULL || info_ptr == NULL)
{
png_warning(png_ptr,
"Call to png_set_acTL() with NULL png_ptr "
"or info_ptr ignored");
return (0);
}
if (num_frames == 0)
{
png_warning(png_ptr,
"Ignoring attempt to set acTL with num_frames zero");
return (0);
}
if (num_frames > PNG_UINT_31_MAX)
{
png_warning(png_ptr,
"Ignoring attempt to set acTL with num_frames > 2^31-1");
return (0);
}
if (num_plays > PNG_UINT_31_MAX)
{
png_warning(png_ptr,
"Ignoring attempt to set acTL with num_plays "
"> 2^31-1");
return (0);
}
info_ptr->num_frames = num_frames;
info_ptr->num_plays = num_plays;
info_ptr->valid |= PNG_INFO_acTL;
return (1);
}
/* delay_num and delay_den can hold any 16-bit values including zero */
png_uint_32 PNGAPI
png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
png_uint_32 width, png_uint_32 height,
png_uint_32 x_offset, png_uint_32 y_offset,
png_uint_16 delay_num, png_uint_16 delay_den,
png_byte dispose_op, png_byte blend_op)
{
png_debug1(1, "in %s storage function", "fcTL");
if (png_ptr == NULL || info_ptr == NULL)
{
png_warning(png_ptr,
"Call to png_set_fcTL() with NULL png_ptr or info_ptr "
"ignored");
return (0);
}
png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset,
delay_num, delay_den, dispose_op, blend_op);
if (blend_op == PNG_BLEND_OP_OVER)
{
if (!(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) &&
!(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
{
png_warning(png_ptr, "PNG_BLEND_OP_OVER is meaningless "
"and wasteful for opaque images, ignored");
blend_op = PNG_BLEND_OP_SOURCE;
}
}
info_ptr->next_frame_width = width;
info_ptr->next_frame_height = height;
info_ptr->next_frame_x_offset = x_offset;
info_ptr->next_frame_y_offset = y_offset;
info_ptr->next_frame_delay_num = delay_num;
info_ptr->next_frame_delay_den = delay_den;
info_ptr->next_frame_dispose_op = dispose_op;
info_ptr->next_frame_blend_op = blend_op;
info_ptr->valid |= PNG_INFO_fcTL;
return (1);
}
void /* PRIVATE */
png_ensure_fcTL_is_valid(png_structp png_ptr,
png_uint_32 width, png_uint_32 height,
png_uint_32 x_offset, png_uint_32 y_offset,
png_uint_16 delay_num, png_uint_16 delay_den,
png_byte dispose_op, png_byte blend_op)
{
if (width == 0 || width > PNG_UINT_31_MAX)
png_error(png_ptr, "invalid width in fcTL (> 2^31-1)");
if (height == 0 || height > PNG_UINT_31_MAX)
png_error(png_ptr, "invalid height in fcTL (> 2^31-1)");
if (x_offset > PNG_UINT_31_MAX)
png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)");
if (y_offset > PNG_UINT_31_MAX)
png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)");
if (width + x_offset > png_ptr->first_frame_width ||
height + y_offset > png_ptr->first_frame_height)
png_error(png_ptr, "dimensions of a frame are greater than"
"the ones in IHDR");
if (dispose_op != PNG_DISPOSE_OP_NONE &&
dispose_op != PNG_DISPOSE_OP_BACKGROUND &&
dispose_op != PNG_DISPOSE_OP_PREVIOUS)
png_error(png_ptr, "invalid dispose_op in fcTL");
if (blend_op != PNG_BLEND_OP_SOURCE &&
blend_op != PNG_BLEND_OP_OVER)
png_error(png_ptr, "invalid blend_op in fcTL");
PNG_UNUSED(delay_num)
PNG_UNUSED(delay_den)
}
png_uint_32 PNGAPI
png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr,
png_byte is_hidden)
{
png_debug(1, "in png_first_frame_is_hidden()");
if (png_ptr == NULL)
return 0;
if (is_hidden)
png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
else
png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN;
PNG_UNUSED(info_ptr)
return 1;
}
#endif /* PNG_APNG_SUPPORTED */
#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
static png_byte
check_location(png_const_structrp png_ptr, int location)
@@ -1472,7 +1329,7 @@ png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr,
#ifdef PNG_MNG_FEATURES_SUPPORTED
png_uint_32 PNGAPI
png_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features)
png_permit_mng_features(png_structrp png_ptr, png_uint_32 mng_features)
{
png_debug(1, "in png_permit_mng_features");
@@ -1779,7 +1636,7 @@ png_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask)
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
/* This function was added to libpng 1.2.6 */
void PNGAPI
png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max,
png_set_user_limits(png_structrp png_ptr, png_uint_32 user_width_max,
png_uint_32 user_height_max)
{
/* Images with dimensions larger than these limits will be
@@ -1795,7 +1652,7 @@ png_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max,
/* This function was added to libpng 1.4.0 */
void PNGAPI
png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
png_set_chunk_cache_max(png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
{
if (png_ptr != NULL)
png_ptr->user_chunk_cache_max = user_chunk_cache_max;
@@ -1803,7 +1660,7 @@ png_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)
/* This function was added to libpng 1.4.1 */
void PNGAPI
png_set_chunk_malloc_max (png_structrp png_ptr,
png_set_chunk_malloc_max(png_structrp png_ptr,
png_alloc_size_t user_chunk_malloc_max)
{
if (png_ptr != NULL)