tTh/libtthimage
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small tweaks

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tTh
2022-09-13 00:11:53 +02:00
parent 8d9c91f1b7
commit 2e0809b691
7 changed files with 85 additions and 61 deletions
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67
Lib/png.c
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@@ -1,10 +1,12 @@
/*
------ libtthimage ------
PNG aka "portable network graphics"s.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <png.h>
@@ -16,46 +18,69 @@
#include "../tthimage.h"
/*
* les infos et le code ici viennent de
* http://www.libpng.org/pub/png/pngbook.html
* http://www.libpng.org/pub/png/pngbook.html
*/
/* static mainprog_info wpng_info; */
/*::------------------------------------------------------------------::*/
static void writepng_version_info(void)
void write_png_version_info(void)
{
fprintf(stderr, " Compiled with libpng %s; using libpng %s.\n",
PNG_LIBPNG_VER_STRING, png_libpng_ver);
fprintf(stderr, " Compiled with zlib %s; using zlib %s.\n",
ZLIB_VERSION, zlib_version);
fprintf(stderr, " Compiled with libpng %s; using libpng %s.\n",
PNG_LIBPNG_VER_STRING, png_libpng_ver);
fprintf(stderr, " Compiled with zlib %s; using zlib %s.\n",
ZLIB_VERSION, zlib_version);
}
/*::------------------------------------------------------------------::*/
Image_Desc * Image_PNG_alloc_load(char *fname, int k)
{
#if DEBUG_LEVEL
fprintf(stderr, "%s ( '%s' %d )\n", __func__, fname, k);
writepng_version_info();
fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, fname, k);
write_png_version_info();
#endif
return NULL;
}
/*::------------------------------------------------------------------::*/
/*
* http://zarb.org/~gc/html/libpng.html
* https://gist.github.com/niw/5963798
*/
int Image_save_as_PNG(Image_Desc *img, char *fname, int p1, int p2)
{
FILE *fp;
int x, y, foo;
png_uint_32 pngv;
FILE *fp;
int x, y, foo;
png_structp png;
png_infop info;
#if DEBUG_LEVEL
fprintf(stderr, "%s ( %p '%s' %d %d )\n", __func__, img, fname, p1, p2);
writepng_version_info();
fprintf(stderr, ">>> %s ( %p '%s' %d %d )\n", __func__, img, fname, p1, p2);
write_png_version_info();
#endif
fp = fopen(fname, "wb");
if (NULL == fp) {
perror(fname);
return BASIC_IO_WR_ERR;
}
png = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
info = png_create_info_struct(png);
if (setjmp(png_jmpbuf(png))) abort();
png_init_io(png, fp);
png_set_IHDR( png,
info,
img->width, img->height,
8,
PNG_COLOR_TYPE_RGBA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT );
png_write_info(png, info);
return FULL_NUCKED;
}
/*::------------------------------------------------------------------::*/