This code intends to show how to display fonts efficiently using regular C, Freetype and OpenGL. The idea is to use a single texture and a single vertex buffer. The code is fairly simple and organized as follow:
mandatory
texture-font: The texture-font structure is in charge of creating bitmap glyphs and to upload them to the texture atlas.
texture-atlas: This structure is responsible for the packing of small regions into a bigger texture. It is based on the skyline bottom left algorithm which appear to be well suited for storing glyphs.
More information at:
http://clb.demon.fi/files/RectangleBinPack.pdfvector: This structure loosely mimics the std::vector class from c++. It is used by texture-atlas (for storing nodes), texture-font (for storing glyphs) and font-manager (for storing fonts).
More information at:
http://www.cppreference.com/wiki/container/vector/start** optional ***
markup: Simple structure that describes text properties (font family, font size, colors, underline, etc.)
font-manager: Structure in charge of caching fonts.
vertex-buffer: Generic vertex buffer structure inspired by pyglet (python). (more information at http://www.pyglet.org)
edtaa3func: Distance field computation by Stefan Gustavson (more information at http://contourtextures.wikidot.com/)
makefont: Allow to generate header file with font information (texture + glyphs) such that it can be used without freetype.