31 lines
665 B
C
31 lines
665 B
C
#include "pam.h"
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#include <stdio.h>
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#include <string.h>
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void write_p7_image(u64 width, u64 height, u8 *buf, const char *outfile) {
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FILE *fp = fopen(outfile, "wb");
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if (!fp) {
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fprintf(stderr, "Couldn't open file: %s\n", outfile);
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return;
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}
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char header[4096] = {0};
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snprintf(header, 4095,
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"P7\n"
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"WIDTH %lu\n"
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"HEIGHT %lu\n"
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"DEPTH 4\n"
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"MAXVAL 255\n"
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"TUPLTYPE RGB_ALPHA\n"
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"ENDHDR\n",
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width, height);
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u64 hdr_size = strlen(header);
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u64 buf_size = width * height * 4;
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fwrite(header, hdr_size, 1, fp);
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fwrite(buf, buf_size, 1, fp);
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fclose(fp);
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}
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