Rendering Text

• obviosly the vid by Sebastian Lague: https://www.youtube.com/watch?v=SO83KQuuZvg is awesome…

  • he tries rendering Vector Fonts… which is definetly quite the adventure
  • with a fun comment: Pasted image 20241229192238.png

• video by VoxelRifts: https://www.youtube.com/watch?v=qcMuyHzhvpI

  • Bitmap Fonts are very very easy to render, but sooo not scalable at all
  • Vector Fonts are hard to render… see Sebastian Lague’s video
  • SDF Fonts = Signed Distance Field Fonts are a bitmap with pixels colored in a gradient based on how far away from the glyph they are
    • they have a problem when rendereing at a scale much bigger then the original glyph
  • MSDF Foints = Mulichannel Signed Distance Field Fonts… are like sdf fonts, but with miltiple channels/colors, so that corners always have edges of different colors

• to render text there are also some things to consider… mostly for non eng fonts

  • Text Shaping (text rendering)
    • going from a list of Unicode glyphs to a list of the actual glyphs to draw with the exact possitions of each one
  • Text Shaping (text rendering) steps
    • Substitution (text rendering)
    • Reordering (text rendering)
    • Positioning (text rendering)
  • there are libs for Text Shaping (text rendering):
    • Harfbuzz (probably more on Linux)
    • Uniscribe (probably mor on Windows (os, software))