mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-06-26 15:29:55 +00:00
114 lines
1.8 KiB
C
114 lines
1.8 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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/* Converts a PNG to RLE compressed data */
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int main(int argc, char **argv) {
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int enough=0,run=0;
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int x;
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unsigned char *image;
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int xsize,ysize,last=-1,next;
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FILE *outfile;
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int size=0;
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if (argc<3) {
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fprintf(stderr,"Usage:\t%s INFILE OUTFILE\n\n",argv[0]);
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exit(-1);
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}
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outfile=fopen(argv[2],"w");
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if (outfile==NULL) {
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fprintf(stderr,"Error! Could not open %s\n",argv[2]);
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exit(-1);
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}
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if (loadpng(argv[1],&image,&xsize,&ysize)<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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printf("Loaded image %d by %d\n",xsize,ysize);
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x=0;
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enough=0;
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/* Write out xsize and ysize */
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fprintf(outfile,"{ 0x%X,0x%X,\n",xsize,ysize);
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size+=2;
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/* Get first top/bottom color pair */
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last=image[x];
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run++;
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x++;
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while(1) {
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/* get next top/bottom color pair */
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next=image[x];
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// printf("x=%d, next=%x image[%d]=%x\n",
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// x,next,
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// x,image[x]);
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/* If color change (or too big) then output our run */
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/* Note 0xff for run length is special case meaning "finished" */
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if ((next!=last) || (run>253)) {
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fprintf(outfile,"0x%02X,0x%02X, ",run,last);
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// printf("%x,%x\n",run,last);
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size+=2;
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run=0;
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last=next;
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}
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x++;
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/* Split up per-line */
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enough++;
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if (enough>=xsize) {
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enough=0;
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fprintf(outfile,"\n");
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}
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/* If we reach the end */
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if (x>=xsize*(ysize/2)) {
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run++;
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/* print tailing value */
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if (run!=0) {
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fprintf(outfile,"0x%02X,0x%02X, ",run,last);
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size+=2;
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}
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break;
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}
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run++;
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}
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/* Print closing marker */
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fprintf(outfile,"0xFF,0xFF,");
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size+=2;
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fprintf(outfile,"};\n");
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fclose(outfile);
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printf("Size %d bytes\n",size);
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return 0;
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}
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