mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-08-15 02:29:09 +00:00
79 lines
1.4 KiB
C
79 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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/* Converts a PNG to a GR file you can BLOAD to 0x400 */
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/* HOWEVER you *never* want to do this in real life */
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/* as it will clobber important values in the memory holes */
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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 enough=0;
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int x;
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unsigned char *image;
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int xsize,ysize;
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FILE *outfile;
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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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while(1) {
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fputc( image[col+(row*xsize)] |
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(image[col+(row+1)*xsize]<<4),outfile);
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x++;
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if (x>0x3f8) break;
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enough++;
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if (enough>119) {
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/* screen hole */
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/* We should never BLOAD this image */
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/* as we can corrupt important state here */
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fputc(0,outfile);
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fputc(0,outfile);
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fputc(0,outfile);
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fputc(0,outfile);
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fputc(0,outfile);
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fputc(0,outfile);
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fputc(0,outfile);
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fputc(0,outfile);
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enough=0;
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}
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col++;
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if (col>39) {
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col=0;
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row+=16;
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if (row>47) row-=46;
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}
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}
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fclose(outfile);
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return 0;
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}
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