view miscprog/fbdump2ppm.c @ 273:f233f0a012c9

miscprog: fbdump2ppm program written, compiles
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 20 Jan 2018 20:46:08 +0000
parents
children 81641d82ccc6
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/*
 * This program converts a dump of TI's R2D framebuffer (176x220 pix, 16-bit)
 * captured via fc-memdump into PPM format for viewing.
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>

#define	NPIX	(176*220)

FILE *inf, *outf;

convert_pixel()
{
	int i, c;
	u_char inb[2];
	unsigned pix16, r, g, b;

	for (i = 0; i < 2; i++) {
		c = getc(inf);
		if (c < 0) {
			fprintf(stderr, "error: input is too short\n");
			exit(1);
		}
		inb[i] = c;
	}
	pix16 = (inb[0] | (inb[1] << 8)) ^ 0xFFFF;
	r = pix16 >> 11;
	g = (pix16 >> 5) & 0x3F;
	b = pix16 & 0x1F;
	putc(r << 3, outf);
	putc(g << 2, outf);
	putc(b << 3, outf);
}

main(argc, argv)
	char **argv;
{
	unsigned n;

	if (argc != 3) {
		fprintf(stderr, "usage: %s infile outfile\n", argv[0]);
		exit(1);
	}
	inf = fopen(argv[1], "r");
	if (!inf) {
		perror(argv[1]);
		exit(1);
	}
	outf = fopen(argv[2], "w");
	if (!outf) {
		perror(argv[2]);
		exit(1);
	}
	fprintf(outf, "P6\n176 220\n255\n");
	for (n = 0; n < NPIX; n++)
		convert_pixel();
	exit(0);
}