dos33fsprogs/utils/gr-utils/png2gr.c
Vince Weaver 285be13597 png2gr: modify so it can handle 280x192 inputs
I hope this didn't break regular png2gr operation
2021-08-24 12:35:48 -04:00

69 lines
1.3 KiB
C

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "loadpng.h"
static short gr_offsets[]={
0x400,0x480,0x500,0x580,0x600,0x680,0x700,0x780,
0x428,0x4a8,0x528,0x5a8,0x628,0x6a8,0x728,0x7a8,
0x450,0x4d0,0x550,0x5d0,0x650,0x6d0,0x750,0x7d0,
};
/* Converts a PNG to a GR file you can BLOAD to 0x400 */
/* HOWEVER you *never* want to do this in real life */
/* as it will clobber important values in the memory holes */
int main(int argc, char **argv) {
int row=0;
int col=0;
int x;
unsigned char out_buffer[1024];
unsigned char *image;
int xsize,ysize;
FILE *outfile;
if (argc<3) {
fprintf(stderr,"Usage:\t%s INFILE OUTFILE\n\n",argv[0]);
exit(-1);
}
outfile=fopen(argv[2],"w");
if (outfile==NULL) {
fprintf(stderr,"Error! Could not open %s\n",argv[2]);
exit(-1);
}
if (loadpng(argv[1],&image,&xsize,&ysize,PNG_WHOLETHING)<0) {
fprintf(stderr,"Error loading png!\n");
exit(-1);
}
fprintf(stderr,"Loaded image %d by %d\n",xsize,ysize);
memset(out_buffer,0,1024);
for(row=0;row<24;row++) {
for(col=0;col<40;col++) {
out_buffer[(gr_offsets[row]-0x400)+col]=
image[row*xsize+col];
}
}
for(x=0;x<1024;x++) fputc( out_buffer[x],outfile);
fclose(outfile);
return 0;
}