glyph-loading

brief comparision with stb_truetype and freetype.
THIS IS NOT A PRODUCTION LEVEL CODE.

debian distro

for using freetype, install it.

sudo apt-get install libfreetype6-dev

vagrant

vagrant test pass

simple code

int main() {
  int pixel_height = 1024;

  stb_font ff;
  ff.init_font("../res/arial.ttf", 0, pixel_height);
  ff.load_glyph('A');
  ff.print_info('A');

  freetype_font ftf;
  ftf.init_font("../res/arial.ttf", 0, pixel_height);
  ftf.load_glyph('A');
  ftf.print_info('A');
}

outputs

glyph bitmap images are dropped on executable directory.

========= stb_tt :
w: 615
h: 657
bearing-x: -3
bearing-y: -657
advance: 612
scaled_asc: 830
scaled_desc: -194
scaled_line_gap: 30
asc: 1854
desc: -434
line_gap: 67
pixel_height: 1024
========= FreeType :
w: 615
h: 657
bearing-x: -2
bearing-y: -657
advance: 612
scaled_asc: 830
scaled_desc: -195
scaled_line_gap: 29
asc: 1854
desc: -434
line_gap: 67
pixel_height: 1024

• stb_truetype output

• freetype output

TODO

• kerning
• rect packing (skyline)
• containing opengl texture info (uv coordinates)
• multi face support (just one font object can hold multiple face index info)
• dynamic font (load only used glyph info), not using rect packing.
• SDF (signed distance field) font loader