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/* $Id: screen_split.c,v 1.10 2009-03-10 20:22:32 vrsieh Exp $
*
* Copyright (C) 2005-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#define MAX_WIDTH 1280
#define MAX_HEIGHT 1024
#define GLYPH_WIDTH 8
#define GLYPH_HEIGHT 16
#if GLYPH_WIDTH > 8
#error "GLYPH_WIDTH can't be bigger than 8 at the moment"
#endif
#include <assert.h>
#include <getopt.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "glyphs_8x16.c"
#include "glue-png.h"
char *progname;
char **screenshots;
static unsigned int width;
static unsigned int height;
static struct {
unsigned char r, g, b;
} pixel[MAX_WIDTH][MAX_HEIGHT];
static unsigned char pattern[MAX_WIDTH / GLYPH_WIDTH * MAX_HEIGHT / GLYPH_HEIGHT][GLYPH_HEIGHT];
static unsigned int npatterns = 0;
static void
screen_read(char *filename)
{
uint32_t *data;
unsigned int x;
unsigned int y;
png_read(&data, &width, &height, filename);
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
pixel[x][y].r = (data[y * width + x] >> 0) & 0xff;
pixel[x][y].g = (data[y * width + x] >> 8) & 0xff;
pixel[x][y].b = (data[y * width + x] >> 16) & 0xff;
}
}
free(data);
}
static void
pattern_add(unsigned char *bits)
{
unsigned int n;
for (n = 0; ; n++) {
if (n == sizeof(glyph_8x16) / sizeof(glyph_8x16[0])) {
/* Not in old glyphs. */
break;
}
if (memcmp(glyph_8x16[n].pattern, bits, GLYPH_HEIGHT) == 0) {
/* Same pattern already in old glyph_8x16.c file. */
return;
}
}
for (n = 0; ; n++) {
if (n == npatterns) {
/* Add new pattern. */
memcpy(pattern[npatterns], bits, GLYPH_HEIGHT);
npatterns++;
break;
}
if (memcmp(pattern[n], bits, GLYPH_HEIGHT) == 0) {
/* Same pattern found. */
return;
}
}
}
static void
screen_split(void)
{
unsigned int x0;
unsigned int y0;
for (y0 = 0; y0 < height; y0 += GLYPH_HEIGHT) {
for (x0 = 0; x0 < width; x0 += 8) {
unsigned char bgr, bgg, bgb;
unsigned int x1;
unsigned int y1;
unsigned char bits[GLYPH_HEIGHT];
bgr = pixel[x0][y0].r;
bgg = pixel[x0][y0].g;
bgb = pixel[x0][y0].b;
for (y1 = 0; y1 < GLYPH_HEIGHT; y1++) {
bits[y1] = 0x00;
for (x1 = 0; x1 < 8; x1++) {
bits[y1] <<= 1;
if (pixel[x0 + x1][y0 + y1].r != bgr
|| pixel[x0 + x1][y0 + y1].g != bgg
|| pixel[x0 + x1][y0 + y1].b != bgb) {
bits[y1] |= 1;
}
}
}
pattern_add(bits);
}
}
}
static void
screen_out(void)
{
unsigned int n;
unsigned int y;
unsigned int x;
for (n = 0; n < npatterns; n++) {
printf("UNKNOWN %d\n", n);
for (y = 0; y < GLYPH_HEIGHT; y++) {
unsigned char bits;
bits = pattern[n][y];
for (x = 0; x < GLYPH_WIDTH; x++) {
if (bits & 0x80) {
printf("@");
} else {
printf(".");
}
bits <<= 1;
}
printf("\n");
}
printf("\n");
}
}
static void
usage(int ret_val) __attribute__((__noreturn__));
static void
usage(int ret_val)
{
fprintf(stderr, "Usage: %s [-h] <screen0> ...\n", progname);
exit(ret_val);
}
int
main(int argc, char **argv)
{
int c;
progname = *argv;
while ((c = getopt(argc, argv, "")) != -1) {
switch (c) {
case 'h':
usage(0);
/*NOTREACHED*/
default:
usage(1);
/*NOTREACHED*/
}
}
argc -= optind;
argv += optind;
if (0 < argc) {
screenshots = argv;
argv += argc;
argc -= argc;
} else {
usage(1);
/*NOTREACHED*/
}
while (*screenshots != (char *) 0) {
screen_read(*screenshots);
screen_split();
screenshots++;
}
screen_out();
return 0;
}
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