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[master] Imported from libpng-1.6.36.tar

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Cosmin Truta
2018-12-01 09:36:00 -05:00
parent 8da397423e
commit 85acd919b9
100 changed files with 1651 additions and 2464 deletions
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38
pngwrite.c
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@@ -1,10 +1,10 @@
/* pngwrite.c - general routines to write a PNG file
*
* Last changed in libpng 1.6.35 [July 15, 2018]
* Copyright (c) 2018 Cosmin Truta
* Copyright (c) 1998-2002,2004,2006-2018 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.)
* Copyright (c) 1996-1997 Andreas Dilger
* Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
@@ -469,7 +469,7 @@ png_write_end(png_structrp png_ptr, png_inforp info_ptr)
#ifdef PNG_CONVERT_tIME_SUPPORTED
void PNGAPI
png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm * ttime)
png_convert_from_struct_tm(png_timep ptime, const struct tm * ttime)
{
png_debug(1, "in png_convert_from_struct_tm");
@@ -948,6 +948,10 @@ png_write_destroy(png_structrp png_ptr)
png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list);
png_free(png_ptr, png_ptr->row_buf);
png_ptr->row_buf = NULL;
#ifdef PNG_READ_EXPANDED_SUPPORTED
png_free(png_ptr, png_ptr->riffled_palette);
png_ptr->riffled_palette = NULL;
#endif
#ifdef PNG_WRITE_FILTER_SUPPORTED
png_free(png_ptr, png_ptr->prev_row);
png_free(png_ptr, png_ptr->try_row);
@@ -1536,7 +1540,7 @@ png_write_image_16bit(png_voidp argument)
display->first_row);
png_uint_16p output_row = png_voidcast(png_uint_16p, display->local_row);
png_uint_16p row_end;
const unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
3 : 1;
int aindex = 0;
png_uint_32 y = image->height;
@@ -1573,7 +1577,7 @@ png_write_image_16bit(png_voidp argument)
while (out_ptr < row_end)
{
const png_uint_16 alpha = in_ptr[aindex];
png_uint_16 alpha = in_ptr[aindex];
png_uint_32 reciprocal = 0;
int c;
@@ -1695,7 +1699,7 @@ png_write_image_8bit(png_voidp argument)
display->first_row);
png_bytep output_row = png_voidcast(png_bytep, display->local_row);
png_uint_32 y = image->height;
const unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
unsigned int channels = (image->format & PNG_FORMAT_FLAG_COLOR) != 0 ?
3 : 1;
if ((image->format & PNG_FORMAT_FLAG_ALPHA) != 0)
@@ -1783,25 +1787,25 @@ png_write_image_8bit(png_voidp argument)
static void
png_image_set_PLTE(png_image_write_control *display)
{
const png_imagep image = display->image;
png_imagep image = display->image;
const void *cmap = display->colormap;
const int entries = image->colormap_entries > 256 ? 256 :
int entries = image->colormap_entries > 256 ? 256 :
(int)image->colormap_entries;
/* NOTE: the caller must check for cmap != NULL and entries != 0 */
const png_uint_32 format = image->format;
const unsigned int channels = PNG_IMAGE_SAMPLE_CHANNELS(format);
png_uint_32 format = image->format;
unsigned int channels = PNG_IMAGE_SAMPLE_CHANNELS(format);
# if defined(PNG_FORMAT_BGR_SUPPORTED) &&\
defined(PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED)
const int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
int afirst = (format & PNG_FORMAT_FLAG_AFIRST) != 0 &&
(format & PNG_FORMAT_FLAG_ALPHA) != 0;
# else
# define afirst 0
# endif
# ifdef PNG_FORMAT_BGR_SUPPORTED
const int bgr = (format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
int bgr = (format & PNG_FORMAT_FLAG_BGR) != 0 ? 2 : 0;
# else
# define bgr 0
# endif
@@ -1951,12 +1955,12 @@ png_image_write_main(png_voidp argument)
* and total image size to ensure that they are within the system limits.
*/
{
const unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format);
unsigned int channels = PNG_IMAGE_PIXEL_CHANNELS(image->format);
if (image->width <= 0x7fffffffU/channels) /* no overflow */
{
png_uint_32 check;
const png_uint_32 png_row_stride = image->width * channels;
png_uint_32 png_row_stride = image->width * channels;
if (display->row_stride == 0)
display->row_stride = (png_int_32)/*SAFE*/png_row_stride;
@@ -2052,7 +2056,7 @@ png_image_write_main(png_voidp argument)
*/
if (write_16bit != 0)
{
PNG_CONST png_uint_16 le = 0x0001;
png_uint_16 le = 0x0001;
if ((*(png_const_bytep) & le) != 0)
png_set_swap(png_ptr);
@@ -2166,7 +2170,7 @@ image_memory_write)(png_structp png_ptr, png_bytep/*const*/ data, size_t size)
{
png_image_write_control *display = png_voidcast(png_image_write_control*,
png_ptr->io_ptr/*backdoor: png_get_io_ptr(png_ptr)*/);
const png_alloc_size_t ob = display->output_bytes;
png_alloc_size_t ob = display->output_bytes;
/* Check for overflow; this should never happen: */
if (size <= ((png_alloc_size_t)-1) - ob)