mirror of
https://github.com/bradgrantham/apple2e.git
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67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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#include <unistd.h>
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#include <cmath>
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#include <FreeImagePlus.h>
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using namespace std;
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// image_out and image_in have identical dimensions
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void extract_glyph(fipImage &image_in, int g, unsigned char glyph[8])
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{
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int glyphs_across = image_in.getWidth() / 7;
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int x = (g % glyphs_across) * 7;
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int y = (g / glyphs_across) * 8; // XXX why invert in Y?
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for(int j = 0; j < 8; j++) {
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unsigned char byte = 0;
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for(int i = 0; i < 7; i++) {
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RGBQUAD result;
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image_in.getPixelColor(x + i, image_in.getHeight() - 1 - (y + j), &result);
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int pixel = (result.rgbRed > 127) ? 1 : 0;
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byte = byte | (pixel << i);
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}
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glyph[j] = byte;
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}
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}
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int main(int argc, char **argv)
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{
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if(argc != 2) {
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printf("usage: %s input\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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fipImage image_in;
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bool success;
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if (!(success = image_in.load(argv[1]))) {
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cerr << "Failed to load image from " << argv[1] << endl;
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exit(EXIT_FAILURE);
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}
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printf("int font_offset = 32;\n");
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printf("unsigned char font_bytes[][8] = {\n");
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static unsigned char font[96][8];
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for(int i = 0; i <= 95; i++) {
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extract_glyph(image_in, i, font[i]);
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printf(" {");
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for(int j = 0; j < 8; j++)
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printf("0x%02X%s", font[i][j], (j < 7) ? ", " : "");
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if(i < 95)
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printf("},\n");
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else
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printf("}\n");
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}
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printf("};\n");
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exit(EXIT_SUCCESS);
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}
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