Graphics.GL.AMD.FramebufferSamplePositions
glGetAMDFramebufferSamplePositions
gl_AMD_framebuffer_sample_positions
glFramebufferSamplePositionsfvAMD
glGetFramebufferParameterfvAMD
glGetNamedFramebufferParameterfvAMD
glNamedFramebufferSamplePositionsfvAMD