update libpng

update libpng, the repo now requires a vcpkg setup for integrating but skipping the install step should allow it to work for windows an linux, mac might need more
This commit is contained in:
marauder2k7 2025-12-31 20:11:14 +00:00
parent c593d860a0
commit 5d644b4ffb
300 changed files with 25573 additions and 17698 deletions

View file

@ -1,64 +1,54 @@
/* contrib/mips-msa/linux.c
*
* Copyright (c) 2020-2023 Cosmin Truta
* Copyright (c) 2016 Glenn Randers-Pehrson
* Written by Mandar Sahastrabuddhe, 2016.
* Last changed in libpng 1.6.25beta03 [August 29, 2016]
* Updated by Sui Jingfeng, 2021.
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
* SEE contrib/mips-msa/README before reporting bugs
* On Linux, png_have_msa is implemented by reading the pseudo-file
* "/proc/self/auxv".
*
* See contrib/mips-msa/README before reporting bugs.
*
* STATUS: SUPPORTED
* BUG REPORTS: png-mng-implement@sourceforge.net
*
* png_have_msa implemented for Linux by reading the widely available
* pseudo-file /proc/cpuinfo.
*
* This code is strict ANSI-C and is probably moderately portable; it does
* however use <stdio.h> and it assumes that /proc/cpuinfo is never localized.
*/
#include <stdio.h>
#include <string.h>
#include <elf.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
static int
png_have_msa(png_structp png_ptr)
{
FILE *f = fopen("/proc/cpuinfo", "rb");
Elf64_auxv_t aux;
int fd;
int has_msa = 0;
char *string = "msa";
char word[10];
if (f != NULL)
fd = open("/proc/self/auxv", O_RDONLY);
if (fd >= 0)
{
while(!feof(f))
while (read(fd, &aux, sizeof(Elf64_auxv_t)) == sizeof(Elf64_auxv_t))
{
int ch = fgetc(f);
static int i = 0;
while(!(ch <= 32))
if (aux.a_type == AT_HWCAP)
{
word[i++] = ch;
ch = fgetc(f);
uint64_t hwcap = aux.a_un.a_val;
has_msa = (hwcap >> 1) & 1;
break;
}
int val = strcmp(string, word);
if (val == 0)
return 1;
i = 0;
memset(word, 0, 10);
}
fclose(f);
close(fd);
}
#ifdef PNG_WARNINGS_SUPPORTED
else
png_warning(png_ptr, "/proc/cpuinfo open failed");
png_warning(png_ptr, "/proc/self/auxv open failed");
#endif
return 0;
return has_msa;
}