GL_OML_resample http://www.opengl.org/registry/specs/gl/OML/resample.txt GL_OML_resample GL_PACK_RESAMPLE_OML 0x8984 GL_UNPACK_RESAMPLE_OML 0x8985 GL_RESAMPLE_REPLICATE_OML 0x8986 GL_RESAMPLE_ZERO_FILL_OML 0x8987 GL_RESAMPLE_AVERAGE_OML 0x8988 GL_RESAMPLE_DECIMATE_OML 0x8989