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