49 lines
970 B
C
49 lines
970 B
C
#include <stdio.h>
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#include <stdint.h>
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int main(int argc, char **argv) {
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if(argc<3) {
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fprintf(stderr, "Usage: %s <infile> <outfile>\n", argv[0]);
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return 1;
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}
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FILE *in, *out;
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if((in=fopen(argv[1], "rb"))==NULL) {
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perror("Could not open input file");
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return 1;
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}
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if((out=fopen(argv[2], "wb"))==NULL) {
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perror("Could not open output file");
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return 1;
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}
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while(1) {
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uint8_t c=fgetc(in);
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if(feof(in))break;
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// if(c>=1 && c<=48) {
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// c+=207;
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// }
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// shift palette by 32
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// keep color 0
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// leave room for sprite pal 3 and 7 (176-192 and 240-255)
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if(c) {
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if(c>224) { // move upper colors to start
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c-=224;
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} else if(c==224) { // remap 224 to 32, not 0
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c=32;
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} else { // shift colors, leave gap 176-191
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// relocate 0xd0-0xdf (which would be
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// remapped to 0x00-0x0f) to 0xb0-0xbf
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c+=32;
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if(c>=176) {
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c+=16;
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if(c<16) c=0xb0+c;
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}
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}
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}
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fputc(c, out);
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}
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fclose(out);
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fclose(in);
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return 0;
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}
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