gltut | learning OpenGL and exploring techniques

gltut is a C++ library. gltut has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

This is a project that was used for learning OpenGL and exploring techniques for rendering vector graphics in OpenGL. lbmain.cpp is the main() file (gltut.cpp and main.cpp are older explorations) - see main() for the accepted keyboard input. It uses stb_truetype to load a font and then renders text with one of several different techniques, implemented in both OpenGL (gl_*.cpp) and with a software renderer (sw_*.cpp). The software renderer tries to implement a kind of GPU emulator (swrender.cpp), such that GLSL shaders can be used with minimial modification as C code. It does not currently implement anything related to depth, stencil, etc. (but it would be interesting to add this). Included are signed distance field (SDF) and various "exact coverage" techniques, some of which were ultimately used for nanovgXC.