This commit also fixes opengl deinitialization.
Program and shaders where not deleted.
Could impact MacOS implementation based on SDL window.
Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Rename GL_RED_COMPONENT into FF_GL_RED_COMPONENT
to explicity mark it is internal define, not OpenGL API.
Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>