GL_EXT_framebuffer_multisample_blit_scaled
http://www.opengl.org/registry/specs/EXT/framebuffer_multisample_blit_scaled.txt
GL_EXT_framebuffer_multisample_blit_scaled
	GL_SCALED_RESOLVE_FASTEST_EXT 0x90BA
	GL_SCALED_RESOLVE_NICEST_EXT 0x90BB
