GL_3DFX_texture_compression_FXT1
https://www.khronos.org/registry/OpenGL/extensions/3DFX/3DFX_texture_compression_FXT1.txt
GL_3DFX_texture_compression_FXT1

	GL_COMPRESSED_RGB_FXT1_3DFX 0x86B0
	GL_COMPRESSED_RGBA_FXT1_3DFX 0x86B1