OpenGL paletted/rgb texture fix
|Reported by:||SF/luke_br||Owned by:||fingolfin|
This patch is intended to fix the problem of people with no paletted texture extension. The code now checks if this extension is present. If it exists then paletted textures are used. Else it fallbacks to RGB texture (a little bit slower). The new fb2opengl.h is now object oriented (C++).
Ticket imported from: #586167. Ticket imported from: patches/94.