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magnum/external/OpenGL/GL
Vladimír Vondruš a83e718c2e
Initial glLoadGen work. 		13 years ago
..
CMakeLists.txt Better usage of external OpenGL headers. 13 years ago
README.md Initial glLoadGen work. 13 years ago
extensions.txt Initial glLoadGen work. 13 years ago
gl_magnum.c Initial glLoadGen work. 13 years ago
gl_magnum.h Initial glLoadGen work. 13 years ago
glcorearb.h Updated upstream OpenGL header for 4.4. 13 years ago
glloadgen.patch Initial glLoadGen work. 13 years ago

README.md

OpenGL header and extension loader is generated using glLoadGen, preferrably from tip of the development branch, currently 2.0. For it to work flawlessly on OpenGL 2.1 and simultaenously not containing all that pre-core stuff, you need to patch it with included glloadgen.patch, which will then force it to use pre-3.0 glGetString(GL_EXTENSIONS) even if we request OpenGL 4.4. Otherwise it would use glGetStringi(GL_EXTENSIONS, i), which is not available on OpenGL 2.1 and extension loading will fail on these systems.

See extensions.txt for a list of requested non-core extensions. Copy the file into glLoadGen directory and generate the files using Lua:

lua LoadGen.lua -style=pointer_c -indent=space -spec=gl -version=4.4 -profile=core -extfile=extensions.txt magnum

Then copy generated gl_magnum.c and gl_magnum.h to this directory. You may want to remove trailing spaces to make the diff cleaner. Be sure to check the diff for suspicious changes.