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- #include <stdio.h>
- #include <stdint.h>
- /* Mapping table. This table specifies the target index in the
- output file. */
- int map_idx [120] = {
- 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
- 0x2c, 0x2d, 0x2e, 0x2f, 0x34, 0x35, 0x36, 0x37,
- 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
- 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
- 0x4c, 0x4d, 0x4e, 0x4f, 0x54, 0x55, 0x56, 0x57,
- 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
- 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b,
- 0x6c, 0x6d, 0x6e, 0x6f, 0x74, 0x75, 0x76, 0x77,
- 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
- 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
- 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
- 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
- 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf
- };
- /* remap colors in a 256 color bitmap */
- int main(int argc, char **argv) {
- if(argc<3) {
- fprintf(stderr, "Usage: %s <infile> <outfile>\n", argv[0]);
- return 1;
- }
- FILE *in, *out;
- if((in=fopen(argv[1], "rb"))==NULL) {
- perror("Could not open input file");
- return 1;
- }
- if((out=fopen(argv[2], "wb"))==NULL) {
- perror("Could not open output file");
- return 1;
- }
- while(1) {
- uint8_t c=fgetc(in);
- if(feof(in))break;
- /* new palette mapping:
- 0-31: fonts, tile stuff
- 32-35: 4bit palette 2
- 36-47: logo
- 48-51: 4bit palette 3
- 52-63: logo
- 64-67: 4bit palette 4
- 68-79: logo
- 80-83: 4bit palette 5
- 84-95: logo
- 96-99: 4bit palette 6
- 100-111: logo
- 112-115: 4bit palette 7
- 116-175: logo
- 176-191: sprites (misc overlays, cursor, etc.)
- 192-255: sprites (logo gfx overlays)
- */
- if(c < 120) {
- c = map_idx[c];
- } else {
- c = 0;
- }
- fputc(c, out);
- }
- fclose(out);
- fclose(in);
- return 0;
- }
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