https://learnopengl.com/In-Practice/Text-Rendering

• Rasterization: rendering a glyph to pixels
• Shaping:
  • how to layout a sequence of glyphs on multiple lines
  • may not be straight-forward such as for latin languages

CoreText / CoreGraphics

Notes on Metal

• Blog post

Steps:

1. Create CGContext
2. Create MTLBuffer pointing to same memory
   1. Write to MTLBuffer with CGContext
3. Create MTLTexture out of MTLBuffer

• FreeType / Harfbuzz

• FreeType for rasterization
• Harfbuzz for shaping

Create a font with Harfbuzz

#include <hb-ft.h>
FT_New_Face(ft_library, font_path, index, &face);
FT_Set_Char_Size(face, 0, 1000, 0, 0);
hb_font_t *font = hb_ft_font_create(face);