#define STB_TRUETYPE_IMPLEMENTATION
#define STBTT_STATIC

#include "third-party/stb_truetype.h"

#include <stdio.h>

#ifndef CODEPOINT
#define CODEPOINT 65
#endif

#define SIZE (1 << 25)
static unsigned char ttf_buffer[SIZE];

int main() {
  FILE* f;
  const float font_size = 42.5;

  stbtt_fontinfo info;
  f = fopen("fonts/FiraSans-Regular.otf", "rb");
  int x = fread(ttf_buffer, 1, SIZE, f);
  fclose(f);
  stbtt_InitFont(&info, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer, 0));

  int width;
  int height;
  int xoff;
  int yoff;
  unsigned char* data = stbtt_GetGlyphSDF(
                                          &info,
                                          stbtt_ScaleForPixelHeight(&info, font_size),
                                          stbtt_FindGlyphIndex(&info, CODEPOINT),
                                          3,
                                          128,
                                          255/6,
                                          &width, &height,
                                          &xoff, &yoff
                                          );

  f = fopen("build/illustration-stb.txt", "w");
  fprintf(f, "%d %d %d %d\n", width, height, xoff, yoff);
  fclose(f);
  f = fopen("build/illustration-stb.bin", "wb");
  fwrite(data, 1, width*height, f);
  fclose(f);
}