fix the OpenGL renderer for legacy contexts
The code is mostly taken from the GL3 shaders.
Tested on a Radeon X1300 PRO GPU. I only get about 10 FPS but other than that it seems to work.
Edited by eyelash
The code is mostly taken from the GL3 shaders.
Tested on a Radeon X1300 PRO GPU. I only get about 10 FPS but other than that it seems to work.