80 lines
3.1 KiB
C
80 lines
3.1 KiB
C
#include <ft2build.h>
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#include FT_FREETYPE_H
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <uchar.h>
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int main(int argc, char **argv) {
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FT_Library library;
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FT_Error error;
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FT_Face face;
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if ((error = FT_Init_FreeType(&library)) ||
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(error = FT_New_Face(library, "/usr/share/fonts/fonts-master/apache/robotomono/RobotoMono-Medium.ttf", 0, &face)) ||
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(error = FT_Set_Char_Size(face, 0, 550, 0, 141)) ||
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(error = FT_Load_Char(face, U'w', FT_LOAD_DEFAULT))) return error;
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int width = face->glyph->advance.x >> 6, height = face->size->metrics.height >> 6, height_bytes = (height + 1) >> 1;
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char path[PATH_MAX];
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strcpy(path, argv[0]);
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strcpy(strrchr(path, '/'), "/../src/font.h");
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FILE *header = fopen(path, "w");
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strcpy(path, argv[0]);
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strcpy(strrchr(path, '/'), "/../src/font.c");
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FILE *source = fopen(path, "w");
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fprintf(header,
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"#ifndef FONT_H\n"
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"#define FONT_H\n"
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"\n"
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"#include <stdint.h>\n"
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"\n"
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"enum {\n"
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"\tFONT_WIDTH = %d,\n"
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"\tFONT_HEIGHT = %d,\n"
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"\tFONT_HEIGHT_BYTES = (FONT_HEIGHT + 1) >> 1,\n"
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"};\n"
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"\n"
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"extern const uint8_t font[0x100][FONT_WIDTH][FONT_HEIGHT_BYTES];\n"
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"\n"
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"#endif\n",
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width, height);
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fprintf(source,
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"#include \"font.h\"\n"
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"\n"
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"const uint8_t font[0x100][FONT_WIDTH][FONT_HEIGHT_BYTES] = {\n");
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uint8_t *bitmap = calloc(width, height_bytes);
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if (!bitmap) return 1;
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for (char32_t c = U'\0'; c <= U'\xFF'; ++c) {
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memset(bitmap, 0, width * height_bytes);
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if ((error = FT_Load_Char(face, c, FT_LOAD_DEFAULT)) ||
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(error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL))) return error;
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fprintf(source, "%c{ // '", c ? ' ' : '\t');
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if (c >= U' ' && c <= U'~')
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fprintf(source, "%c", (char)c);
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else
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fprintf(source, "\\x%02hhX", (unsigned char)c);
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fprintf(source, "'\n");
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for (int sy = 0, dy = (face->size->metrics.ascender >> 6) - face->glyph->bitmap_top; sy != face->glyph->bitmap.rows; ++sy, ++dy) {
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for (int sx = 0, dx = face->glyph->bitmap_left; sx != face->glyph->bitmap.width; ++sx, ++dx) {
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if (dx < 0 || dx >= width || dy < 0 || dy >= height) continue;
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uint8_t g = face->glyph->bitmap.buffer[sy * face->glyph->bitmap.pitch + sx];
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bitmap[dx * height_bytes + (dy >> 1)] |= (g >> 4) << ((dy & 1) << 2);
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}
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}
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uint8_t *p = bitmap;
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for (int x = 0; x != width; ++x) {
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fprintf(source, "\t\t{ ");
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for (int y = 0; y != height_bytes; ++y) {
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if (y) fprintf(source, ", ");
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fprintf(source, "0x%02hhX", (unsigned char)~*p++);
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}
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fprintf(source, " },\n");
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}
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fprintf(source, "\t},");
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}
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fprintf(source, "\n};\n");
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free(bitmap);
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fclose(source);
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fclose(header);
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}
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