text: #include "stb_rect_pack.h"
  #define STB_TRUETYPE_IMPLEMENTATION
  #include "stb_truetype.h"
  #include "stb_image_write.h"
  
  #ifdef TT_TEST
  
  #include <stdio.h>
  
  char ttf_buffer[1<<25];
  unsigned char output[512*100];
  
  void debug(void)
  {
     stbtt_fontinfo font;
     fread(ttf_buffer, 1, 1<<25, fopen("c:/x/lm/LiberationMono-Regular.ttf", "rb"));
     stbtt_InitFont(&font, ttf_buffer, 0);
  
     stbtt_MakeGlyphBitmap(&font, output, 6, 9, 512, 5.172414E-03f, 5.172414E-03f, 54);
  }
  
  #define BITMAP_W  256
  #define BITMAP_H  512
  unsigned char temp_bitmap[BITMAP_H][BITMAP_W];
  stbtt_bakedchar cdata[256*2]; // ASCII 32..126 is 95 glyphs
  stbtt_packedchar pdata[256*2];
  
  int main(int argc, char **argv)
  {
     stbtt_fontinfo font;
     unsigned char *bitmap;
     int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 34807), s = (argc > 2 ? atoi(argv[2]) : 32);
  
     //debug();
  
     // @TODO: why is minglui.ttc failing? 
     fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/mingliu.ttc", "rb"));
  
     //fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/x/DroidSansMono.ttf", "rb"));
     {
        static stbtt_pack_context pc;
        static stbtt_packedchar cd[256];
        static unsigned char atlas[1024*1024];
  
        stbtt_PackBegin(&pc, atlas, 1024,1024,1024,1,NULL);
        stbtt_PackFontRange(&pc, ttf_buffer, 0, 32.0, 0, 256, cd);
        stbtt_PackEnd(&pc);
     }
  
  #if 0
     stbtt_BakeFontBitmap(ttf_buffer,stbtt_GetFontOffsetForIndex(ttf_buffer,0), 40.0, temp_bitmap[0],BITMAP_W,BITMAP_H, 32,96, cdata); // no guarantee this fits!
     stbi_write_png("fonttest1.png", BITMAP_W, BITMAP_H, 1, temp_bitmap, 0);
  
     {
        stbtt_pack_context pc;
        stbtt_PackBegin(&pc, temp_bitmap[0], BITMAP_W, BITMAP_H, 0, 1, NULL);
        stbtt_PackFontRange(&pc, ttf_buffer, 0, 20.0, 32, 95, pdata);
        stbtt_PackFontRange(&pc, ttf_buffer, 0, 20.0, 0xa0, 0x100-0xa0, pdata);
        stbtt_PackEnd(&pc);
        stbi_write_png("fonttest2.png", BITMAP_W, BITMAP_H, 1, temp_bitmap, 0);
     }
  
     {
        stbtt_pack_context pc;
        stbtt_pack_range pr[2];
        stbtt_PackBegin(&pc, temp_bitmap[0], BITMAP_W, BITMAP_H, 0, 1, NULL);
  
        pr[0].chardata_for_range = pdata;
        pr[0].first_unicode_char_in_range = 32;
        pr[0].num_chars_in_range = 95;
        pr[0].font_size = 20.0f;
        pr[1].chardata_for_range = pdata+256;
        pr[1].first_unicode_char_in_range = 0xa0;
        pr[1].num_chars_in_range = 0x100 - 0xa0;
        pr[1].font_size = 20.0f;
  
        stbtt_PackSetOversampling(&pc, 2, 2);
        stbtt_PackFontRanges(&pc, ttf_buffer, 0, pr, 2);
        stbtt_PackEnd(&pc);
        stbi_write_png("fonttest3.png", BITMAP_W, BITMAP_H, 1, temp_bitmap, 0);
     }
     return 0;
  #endif
  
     stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0));
     bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, (float)s), c, &w, &h, 0,0);
  
     for (j=0; j < h; ++j) {
        for (i=0; i < w; ++i)
           putchar(" .:ioVM@"[bitmap[j*w+i]>>5]);
        putchar('\n');
     }
     return 0;
  }
  #endif
  