74 lines
1.8 KiB
C++
74 lines
1.8 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][7])
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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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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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glyph[j][i] = (result.rgbRed > 127) ? 255 : 0;
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}
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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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unsigned char font[96 * 8 * 7];
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for(int k = 0; k <= 95; k++) {
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unsigned char glyph[8][7];
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extract_glyph(image_in, k, glyph);
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for(int j = 0; j < 8; j++)
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for(int i = 0; i < 7; i++) {
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font[i + j * 7 + k * 7 * 8] = glyph[j][i];
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}
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}
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printf("int font_offset = 32;\n");
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printf("unsigned char font_bytes[96 * 7 * 8] = {\n");
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for(int k = 0; k < 96; k++) {
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int c = k + 32;
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if(c == '\\')
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printf(" // %d : backslash\n", c);
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else
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printf(" // %d : %c\n", c, c);
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for(int j = 0; j < 8; j++) {
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printf(" ");
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for(int i = 0; i < 7; i++)
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printf("0x%02X,", font[i + j * 7 + k * 7 * 8]);
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printf("\n");
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}
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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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