GL_EXT_texture
http://oss.sgi.com/projects/ogl-sample/registry/EXT/texture.txt
	GL_ALPHA4_EXT 0x803B
	GL_ALPHA8_EXT 0x803C
	GL_ALPHA12_EXT 0x803D
	GL_ALPHA16_EXT 0x803E
	GL_LUMINANCE4_EXT 0x803F
	GL_LUMINANCE8_EXT 0x8040
	GL_LUMINANCE12_EXT 0x8041
	GL_LUMINANCE16_EXT 0x8042
	GL_LUMINANCE4_ALPHA4_EXT 0x8043
	GL_LUMINANCE6_ALPHA2_EXT 0x8044
	GL_LUMINANCE8_ALPHA8_EXT 0x8045
	GL_LUMINANCE12_ALPHA4_EXT 0x8046
	GL_LUMINANCE12_ALPHA12_EXT 0x8047
	GL_LUMINANCE16_ALPHA16_EXT 0x8048
	GL_INTENSITY_EXT 0x8049
	GL_INTENSITY4_EXT 0x804A
	GL_INTENSITY8_EXT 0x804B
	GL_INTENSITY12_EXT 0x804C
	GL_INTENSITY16_EXT 0x804D
	GL_RGB2_EXT 0x804E
	GL_RGB4_EXT 0x804F
	GL_RGB5_EXT 0x8050
	GL_RGB8_EXT 0x8051
	GL_RGB10_EXT 0x8052
	GL_RGB12_EXT 0x8053
	GL_RGB16_EXT 0x8054
	GL_RGBA2_EXT 0x8055
	GL_RGBA4_EXT 0x8056
	GL_RGB5_A1_EXT 0x8057
	GL_RGBA8_EXT 0x8058
	GL_RGB10_A2_EXT 0x8059
	GL_RGBA12_EXT 0x805A
	GL_RGBA16_EXT 0x805B
	GL_TEXTURE_RED_SIZE_EXT 0x805C
	GL_TEXTURE_GREEN_SIZE_EXT 0x805D
	GL_TEXTURE_BLUE_SIZE_EXT 0x805E
	GL_TEXTURE_ALPHA_SIZE_EXT 0x805F
	GL_TEXTURE_LUMINANCE_SIZE_EXT 0x8060
	GL_TEXTURE_INTENSITY_SIZE_EXT 0x8061
	GL_REPLACE_EXT 0x8062
	GL_PROXY_TEXTURE_1D_EXT 0x8063
	GL_PROXY_TEXTURE_2D_EXT 0x8064