xiaqibo / freetype-gl

OpenGL text using one vertex buffer, one texture and FreeType

Freetype GL - A C OpenGL Freetype engine

A small library for displaying Unicode in OpenGL using a single texture and a single vertex buffer.

Installation instructions

Code organization

Mandatory files

• 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.

• vector: 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 files

• 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.

Contributors

• Ryan.H.Kawicki (Initial CMake project)
• Julian Mayer (Several bugfixes and code for demo-opengl-4.cc)
• Sylvain Duclos (Android port)
• Wang Yongcong (Improvements on the windows build and code review)
• Jonas Wielicki (Bug report & fix on the CMakefile)
• whatmannerofburgeristhis (Bug report in makefont)
• Andrei Petrovici (Fine analysis of the whole code and report of potential problems)
• Cristi Caloghera (Report on bad vertex buffer usage)
• Andrei Petrovici (Code review)
• Kim Jacobsen (Bug report & fix)
• bsoddd (Bug report & fix)
• Greg Douglas (Bug report & fix)
• Jim Teeuwen (Bug report & fix)
• quarnster (Bug report & fix)
• Per Inge Mathisen (Bug report & fix)
• Wojciech Mamrak (Code review, bug report & fix)
• Wael Eloraiby (Put code to the C89 norm and fix CMakefile)
• Christian Forfang (Code review, fix & patch for 3.2 core profile)
• Lukas Murmann (Code review & fix for 3.2 core profile)
• Jérémie Roy (Code review, fix and new ideas)
• dsewtz (Bug report & fix)
• jcgamestoy (Bug report & fix)
• Behdad Esfahbod (Bug fix on harfbuzz demo)
• Marcel Metz (Bug report & fix, CMmake no demo option, makefont parameters)
• PJ O'Halloran (svn to git migration)
• William Light (Face creation from memory)
• Jan Niklas Hasse (Bug report & fix + README.md)
• Pierre-Emmanuel Lallemant (Bug report & fix + travis setup)
• Robert Conde (Bug report & fix)
• Mikołaj Siedlarek (Build system bug fix)
• Preet Desai (Bug report & fix)
• Andy Staton (CMake fix and added namespace safeguard (avoiding glm collisions))
• Daniel Burke (Removed GLEW dependency and fix problems with font licences)
• Bob Kocisko (Added horizontal text alignment and text bounds calculation)
• Ciro Santilli (Improve markdown documentation)