OpenGL only supports shared alpha blending. Subpixel font rendering
requires using the font RGB values as alpha masks for the corresponding
RGB channels. To support this, blending is implemented in the fragment
shader.
The grid holds the state of the terminal with row-major ordering.
Eventually, the grid::Cell type will hold other attributes such as
color, background color, decorations, and weight.
An initialization list is added for common ASCII symbols.
- Commend vertex slice
- Add helper for binding mask texture (and specify that it's a mask)
- Prefix uniform members of ShaderProgram with u_. This makes it easy to
identify in the rest of code.
A list of families is returned. Each variant contains the variant's
style, the filepath for the variant, and the index of the variant in the
file. This info should be enough to get freetype to actually load a
font.
This function isn't exactly useful, but it's working ffi with the
fontconfig library. Woo! Next step will be returning some objects with
more information (like font path so we can start rendering glyphs!).
