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#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <png.h>
#include "fail.h"
#include "pngwrite.h"
void pngwrite( image_t *image, char* filename )
{
png_structp png_ptr;
png_infop info_ptr;
/* create file */
FILE *fp = (FILE*)0;
if( !strcmp( filename, "-" ) )
{
fp = stdout;
}
else
{
/* create file */
fp = fopen(filename, "wb");
}
if (!fp)
fail("[pngwrite] File %s could not be opened for writing", filename);
/* initialize stuff */
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
fail("[pngwrite] png_create_write_struct failed");
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
fail("[pngwrite] png_create_info_struct failed");
if (setjmp(png_jmpbuf(png_ptr)))
fail("[pngwrite] Error during init_io");
png_init_io(png_ptr, fp);
/* write header */
if (setjmp(png_jmpbuf(png_ptr)))
fail("[pngwrite] Error during writing header");
png_set_IHDR(png_ptr, info_ptr, image->width, image->height,
1, PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
png_write_info(png_ptr, info_ptr);
/* write bytes */
if (setjmp(png_jmpbuf(png_ptr)))
fail("[pngwrite] Error during writing bytes");
png_write_image(png_ptr, image->rowps);
/* end write */
if (setjmp(png_jmpbuf(png_ptr)))
fail("[pngwrite] Error during end of write");
png_write_end(png_ptr, NULL);
fclose(fp);
}
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