92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/* png2sprites */
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/* take a png image and generate sprites */
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/* they will be in the format */
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/* label: */
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/* .byte xsize,ysize */
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/* .byte line0data */
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/* ... */
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/* .byte lineNdata */
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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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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 pixel;
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int sprite_x, sprite_y, sprite_xsize, sprite_ysize;
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unsigned char *image;
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int xsize,ysize;
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if (argc<6) {
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fprintf(stderr,"Usage:\t%s INFILE label x y xsize ysize\n\n",argv[0]);
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exit(-1);
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}
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sprite_x=atoi(argv[3]);
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sprite_y=atoi(argv[4]);
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sprite_xsize=atoi(argv[5]);
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sprite_ysize=atoi(argv[6]);
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if ((sprite_x>40) || (sprite_y>48)) {
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fprintf(stderr,"Error! %d %d for sprite x,y out of bounds!\n",
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sprite_x,sprite_y);
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exit(-1);
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}
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if ((sprite_x+sprite_xsize>40) || (sprite_y+sprite_ysize>48)) {
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fprintf(stderr,"Error! %d %d for sprite x,y out of bounds!\n",
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sprite_x+sprite_xsize,sprite_y+sprite_ysize);
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exit(-1);
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}
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if ( ((sprite_y%2)!=0) || ((sprite_y+sprite_ysize)%2!=0)) {
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fprintf(stderr,"Error! Y co-ords need to be a multiple of 2\n");
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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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if ((xsize!=40) || (ysize!=48)) {
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fprintf(stderr,"Error! Must be 80x48!\n");
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exit(1);
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}
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fprintf(stdout,"%s:\n",argv[2]);
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fprintf(stdout,".byte %d,%d\n",sprite_xsize,sprite_ysize/2);
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for(row=sprite_y/2;row<(sprite_y+sprite_ysize)/2;row++) {
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fprintf(stdout,".byte ");
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for(col=sprite_x;col<sprite_x+sprite_xsize;col++) {
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if (col!=sprite_x) fprintf(stdout,",");
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pixel=(image[row*xsize+col]);
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fprintf(stdout,"$%02X",pixel);
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}
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fprintf(stdout,"\n");
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}
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fprintf(stdout,"\n");
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return 0;
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}
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