71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
#include <stdio.h>
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#include <stdint.h>
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/* Mapping table. This table specifies the target index in the
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output file. */
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int map_idx [120] = {
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0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
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0x2c, 0x2d, 0x2e, 0x2f, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
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0x4c, 0x4d, 0x4e, 0x4f, 0x54, 0x55, 0x56, 0x57,
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0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
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0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b,
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0x6c, 0x6d, 0x6e, 0x6f, 0x74, 0x75, 0x76, 0x77,
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0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
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0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
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0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
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0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
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0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
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0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf
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};
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/* remap colors in a 256 color bitmap */
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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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/* new palette mapping:
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0-31: fonts, tile stuff
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32-35: 4bit palette 2
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36-47: logo
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48-51: 4bit palette 3
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52-63: logo
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64-67: 4bit palette 4
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68-79: logo
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80-83: 4bit palette 5
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84-95: logo
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96-99: 4bit palette 6
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100-111: logo
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112-115: 4bit palette 7
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116-175: logo
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176-191: sprites (misc overlays, cursor, etc.)
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192-255: sprites (logo gfx overlays)
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*/
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if(c < 120) {
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c = map_idx[c];
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} else {
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c = 0;
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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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