85 lines
1.4 KiB
C
85 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include "loadpng.h"
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static int print_rle(int color, int run) {
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int ret=0;
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if ((color&0xf)!=((color>>4)&0xf)) {
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fprintf(stderr,"color not match! %x\n",color);
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ret=1;
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}
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if (run>63) {
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fprintf(stderr,"Run too big %x\n",run);
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ret=1;
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}
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if (run==1) {
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printf("%c",(color&0xf)+16+' ');
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}
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else {
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printf("%c%c",(color&0xf)+' ',run+' ');
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// fprintf(stderr,"c=%x run=%x\n",color,run);
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}
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return ret;
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}
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/* Converts a PNG to a 6-bit RLE encoding */
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int main(int argc, char **argv) {
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int row=0;
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int col=0;
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int color=0,oldcolor=0;
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int run=0;
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unsigned char *image;
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int xsize,ysize;
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if (argc<2) {
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fprintf(stderr,"Usage:\t%s INFILE\n\n",argv[0]);
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exit(-1);
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}
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if (loadpng(argv[1],&image,&xsize,&ysize,PNG_WHOLETHING)<0) {
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fprintf(stderr,"Error loading png!\n");
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exit(-1);
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}
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fprintf(stderr,"Loaded image %d by %d\n",xsize,ysize);
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oldcolor=image[0];
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for(row=0;row<24;row++) {
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for(col=0;col<40;col++) {
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color=image[row*xsize+col];
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if (color!=oldcolor) {
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if (print_rle(oldcolor,run)) {
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fprintf(stderr,"at %d, %d\n",col,row);
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}
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oldcolor=color;
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run=0;
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}
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if (run>62) {
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if (print_rle(oldcolor,run)) {
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fprintf(stderr,"at %d, %d\n",col,row);
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}
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oldcolor=color;
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run=0;
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}
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run++;
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}
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}
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print_rle(oldcolor,run);
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printf("\n");
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return 0;
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}
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