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42 lines
1.0 KiB
42 lines
1.0 KiB
#include "png.h"
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#include "util.h"
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#include <stdio.h>
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/* fxlink_png_save(): Save a bitmap into a PNG file */
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int fxlink_png_save(png_byte **row_pointers, int width, int height,
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char const *path)
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{
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png_struct *png = png_create_write_struct(PNG_LIBPNG_VER_STRING,
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NULL, NULL, NULL);
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if(!png)
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return err("failed to write PNG: png_create_write_struct");
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png_infop info = png_create_info_struct(png);
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if(!info)
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return err("failed to write PNG: png_create_info_struct");
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FILE *fp = fopen(path, "wb");
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if(!fp) {
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png_destroy_write_struct(&png, &info);
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return err("failed to open '%s' to write PNG: %m", path);
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}
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if(setjmp(png_jmpbuf(png))) {
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fclose(fp);
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png_destroy_write_struct(&png, &info);
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return 1;
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}
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png_init_io(png, fp);
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png_set_IHDR(png, info,
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width, height, 8,
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PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
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PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
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png_write_info(png, info);
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png_write_image(png, row_pointers);
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png_write_end(png, NULL);
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png_destroy_write_struct(&png, &info);
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fclose(fp);
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return 0;
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}
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