GLverse is small and simple, but also aims to be an efficient raster text (font) rendering library with backend based on FreeType/OpenGL and a demo app based on GLFW.

Current version: 0.5

GLverse should compile (compile, not necessarily link) well on either Linux/Windows/macOS, preferably using LLVM Clang. Minimum supported language version is C++14 due to various handy constructs being used (make_unique, decltype(auto), generic and improved lambdas, etc.).

NOTE: You may encounter linkage problems on platforms other than Linux (Debian/Arch).

Usual compilation procedure on Linux using ninja:

$ git clone https://github.com/barczynsky/GLverse.git
$ cd GLverse
$ mkdir build
$ cd build
$ cmake -GNinja ..
$ ninja
$ ./demo.GLverse

With this you will build a static GLverse library and a simple visual demo, usually presenting recently added features.

• CMake 3.1 (build only)
• OpenGL 3.3 (demo still uses compatibility context)
• GLEW 2.0 (will be replaced by gl3w, after core context transition)
• FreeType 2.6
• GLFW 3.2
• X11 (Linux only)
• stuff, that I don't remember.

• Lazy Text Rendering (create new texture only when the text was modified)
• Font kerning (from kern tables)
• Font and glyph metrics (for TrueType and OpenType faces)
• Saturated addition math (saturate_add) needed for in-place glyph bitmap blending
• Text layout control, such as text wrap or alignment
• Texel container serving as either one or two dimensional texture buffer
• Font repository, also used for caching rendered glyphs
• Ready for multithreaded pipeline by extensive use of mutexes
• Demo code is now using Noto Fonts

• Restrict texture drawing area, probably by using OpenGL scissor test