96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/* Convert 16x16 PNGs to 8+128 text for use in AppleII Basic bot loader */
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#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 color_count=0;
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static int colors[16];
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static int find_color(int which) {
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int i;
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for(i=0;i<color_count;i++) {
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if (colors[i]==which) {
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// printf("Found %d at %d\n",which,i);
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return i;
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}
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}
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/* not found */
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colors[color_count]=which;
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// printf("New %d at %d\n",which,color_count);
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color_count++;
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return color_count-1;
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}
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int main(int argc, char **argv) {
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int i = 0, row,col;
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unsigned char in[1024];
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int op=0;
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int color;
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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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memset(in,0,sizeof(in));
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memset(colors,0,sizeof(colors));
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for(row=0;row<ysize;row+=2) {
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for(i=0;i<2;i++) {
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for(col=0;col<xsize;col++) {
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if (i==0) {
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color=find_color(image[row/2*xsize+col]&0xf);
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}
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else {
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color=find_color(image[row/2*xsize+col]>>4);
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}
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in[op]=color;
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op++;
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}
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}
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}
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printf("Raw Image was %d bytes, %d colors\n",op,color_count);
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#if 0
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for(i=0;i<color_count;i++) {
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printf("Color %d = %d (%c)\n",i,colors[i],colors[i]+35);
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}
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for(i=0;i<op;i++) {
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printf("%d,",in[i]);
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if (i%16==15) printf("\n");
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}
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#endif
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for(i=0;i<8;i++) printf("%c",colors[i]+35);
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for(i=0;i<op;i+=2) printf("%c",((in[i+1]<<3)+in[i])+35);
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printf("\n");
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return 0;
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}
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