GL_3DFX_texture_compression_FXT1
http://www.opengl.org/registry/specs/3DFX/texture_compression_FXT1.txt
GL_3DFX_texture_compression_FXT1
	GL_COMPRESSED_RGB_FXT1_3DFX 0x86B0
	GL_COMPRESSED_RGBA_FXT1_3DFX 0x86B1
