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libpng: Update to 1.6.45

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This commit is contained in:
Rémi Verschelde
2025-01-09 14:59:15 +01:00
parent 0e3a5eda86
commit f68d55bcda
34 changed files with 929 additions and 228 deletions
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82
thirdparty/libpng/pngwutil.c vendored
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@@ -1,4 +1,3 @@
/* pngwutil.c - utilities to write a PNG file
*
* Copyright (c) 2018-2024 Cosmin Truta
@@ -9,12 +8,30 @@
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
* This file contains routines that are only called from within
* libpng itself during the course of writing an image.
*/
#include "pngpriv.h"
#ifdef PNG_WRITE_SUPPORTED
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Arrays to facilitate interlacing - use pass (0 - 6) as index. */
/* Start of interlace block */
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static const png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static const png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
/* TODO: Move these arrays to a common utility module to avoid duplication. */
#endif
#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
/* Place a 32-bit number into a buffer in PNG byte order. We work
* with unsigned numbers for convenience, although one supported
@@ -1471,6 +1488,29 @@ png_write_bKGD(png_structrp png_ptr, png_const_color_16p back, int color_type)
}
#endif
#ifdef PNG_WRITE_cICP_SUPPORTED
/* Write the cICP data */
void /* PRIVATE */
png_write_cICP(png_structrp png_ptr,
png_byte colour_primaries, png_byte transfer_function,
png_byte matrix_coefficients, png_byte video_full_range_flag)
{
png_byte buf[4];
png_debug(1, "in png_write_cICP");
png_write_chunk_header(png_ptr, png_cICP, 4);
buf[0] = colour_primaries;
buf[1] = transfer_function;
buf[2] = matrix_coefficients;
buf[3] = video_full_range_flag;
png_write_chunk_data(png_ptr, buf, 4);
png_write_chunk_end(png_ptr);
}
#endif
#ifdef PNG_WRITE_eXIf_SUPPORTED
/* Write the Exif data */
void /* PRIVATE */
@@ -1889,22 +1929,6 @@ png_write_tIME(png_structrp png_ptr, png_const_timep mod_time)
void /* PRIVATE */
png_write_start_row(png_structrp png_ptr)
{
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static const png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static const png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
png_alloc_size_t buf_size;
int usr_pixel_depth;
@@ -2004,22 +2028,6 @@ png_write_start_row(png_structrp png_ptr)
void /* PRIVATE */
png_write_finish_row(png_structrp png_ptr)
{
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
/* Start of interlace block in the y direction */
static const png_byte png_pass_ystart[7] = {0, 0, 4, 0, 2, 0, 1};
/* Offset to next interlace block in the y direction */
static const png_byte png_pass_yinc[7] = {8, 8, 8, 4, 4, 2, 2};
#endif
png_debug(1, "in png_write_finish_row");
/* Next row */
@@ -2095,14 +2103,6 @@ png_write_finish_row(png_structrp png_ptr)
void /* PRIVATE */
png_do_write_interlace(png_row_infop row_info, png_bytep row, int pass)
{
/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
/* Start of interlace block */
static const png_byte png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
/* Offset to next interlace block */
static const png_byte png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
png_debug(1, "in png_do_write_interlace");
/* We don't have to do anything on the last pass (6) */