mirror of https://github.com/pret/pokecrystal.git
106 lines
1.9 KiB
C
106 lines
1.9 KiB
C
#include <stdio.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <getopt.h>
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void usage(void) {
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printf("Usage: palette palfile\n");
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exit(1);
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}
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void print_rgb(uint16_t word) {
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int r, g, b;
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r = word & 0x1f;
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g = (word >> 5) & 0x1f;
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b = (word >> 10) & 0x1f;
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printf("\tRGB %2d, %2d, %2d\n", r, g, b);
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}
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void print_pokemon_palette(char* palette_filename) {
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FILE* f;
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uint8_t bytes[4];
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f = fopen(palette_filename, "rb");
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if (f == NULL) {
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fprintf(stderr, "failed to open file %s\n", palette_filename);
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exit(1);
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}
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fseek(f, 2, SEEK_SET);
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size_t size = 4;
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if (size != fread(bytes, 1, size, f)) {
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fprintf(stderr, "failed to read file %s\n", palette_filename);
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exit(1);
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}
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fclose(f);
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print_rgb((bytes[1] << 8) | bytes[0]);
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print_rgb((bytes[3] << 8) | bytes[2]);
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}
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void print_palette(char* palette_filename) {
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FILE* f;
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uint8_t* bytes;
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size_t size;
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int i;
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f = fopen(palette_filename, "rb");
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if (f == NULL) {
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fprintf(stderr, "failed to open file %s\n", palette_filename);
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exit(1);
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}
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fseek(f, 0, SEEK_END);
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size = ftell(f);
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if (!size) {
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fprintf(stderr, "empty file %s\n", palette_filename);
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exit(1);
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}
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rewind(f);
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bytes = malloc(size);
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if (!bytes) {
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fprintf(stderr, "malloc failure\n");
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exit(1);
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}
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fseek(f, 0, SEEK_SET);
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if (size != fread(bytes, 1, size, f)) {
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fprintf(stderr, "failed to read file %s\n", palette_filename);
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exit(1);
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}
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fclose(f);
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for (i = 0; i + 1 < (int)size; i += 2) {
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print_rgb((bytes[i + 1] << 8) | bytes[i]);
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}
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}
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int main(int argc, char* argv[]) {
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int ch;
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bool pokemon = false;
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while ((ch = getopt(argc, argv, "p")) != -1) {
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switch (ch) {
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case 'p':
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pokemon = true;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc < 1) {
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usage();
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}
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if (pokemon) {
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print_pokemon_palette(argv[0]);
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} else {
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print_palette(argv[0]);
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}
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return 0;
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}
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