106 行
1.9 KiB
C
106 行
1.9 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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int main(int argc, char** argv)
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{
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if (argc != 3)
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{
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fprintf(stderr, "Usage: %s <input palette> <output header>\n", argv[0]);
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return 1;
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}
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const char* inFilename = argv[1];
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const char* outFilename = argv[2];
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// Read the file
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uint16_t* palette;
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int paletteSize;
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{
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FILE* inFile = fopen(inFilename, "r");
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assert(inFile);
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char* line;
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size_t len = 0;
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getline(&line, &len, inFile);
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assert(strncmp(line, "JASC-PAL", 8) == 0);
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getline(&line, &len, inFile);
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assert(strncmp(line, "0100", 4) == 0);
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getline(&line, &len, inFile);
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paletteSize = atoi(line);
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palette = malloc(sizeof(*palette) * paletteSize);
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assert(palette);
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// Each line is of form R G B
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for (int i = 0; i < paletteSize; ++i)
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{
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getline(&line, &len, inFile);
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char* tok = strtok(line, " ");
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int red = atoi(tok);
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tok = strtok(NULL, " ");
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int green = atoi(tok);
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tok = strtok(NULL, " ");
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int blue = atoi(tok);
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uint16_t rgb565 =
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((red >> 3u) << 11u)
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| ((green >> 2u) << 5u)
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| (blue >> 3u);
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uint16_t endianSwap = ((rgb565 & 0xFFu) << 8u) | (rgb565 >> 8u);
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palette[i] = endianSwap;
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}
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fclose(inFile);
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}
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printf("Input: %s\n", inFilename);
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printf("Output: %s\n", outFilename);
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printf("Palette Size: %d\n", paletteSize);
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// Output to the file
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{
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FILE* outFile = fopen(outFilename, "w");
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assert(outFile);
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fprintf(outFile, "// AUTOMATICALLY GENERATED. DO NOT EDIT.\n");
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fprintf(outFile, "\n");
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fprintf(outFile, "#pragma once\n");
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fprintf(outFile, "\n");
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fprintf(outFile, "\n");
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fprintf(outFile, "uint16_t palette[%d] =\n", paletteSize);
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fprintf(outFile, "{\n");
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for (int i = 0; i < paletteSize; ++i)
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{
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fprintf(outFile, " 0x%04X,\n", palette[i]);
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}
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fprintf(outFile, "};\n");
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fprintf(outFile, "\n");
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fclose(outFile);
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}
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printf("\n");
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printf("DONE\n");
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return 0;
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}
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