1GL_EXT_texture 2http://www.opengl.org/registry/specs/EXT/texture.txt 3GL_EXT_texture 4 5 GL_ALPHA4_EXT 0x803B 6 GL_ALPHA8_EXT 0x803C 7 GL_ALPHA12_EXT 0x803D 8 GL_ALPHA16_EXT 0x803E 9 GL_LUMINANCE4_EXT 0x803F 10 GL_LUMINANCE8_EXT 0x8040 11 GL_LUMINANCE12_EXT 0x8041 12 GL_LUMINANCE16_EXT 0x8042 13 GL_LUMINANCE4_ALPHA4_EXT 0x8043 14 GL_LUMINANCE6_ALPHA2_EXT 0x8044 15 GL_LUMINANCE8_ALPHA8_EXT 0x8045 16 GL_LUMINANCE12_ALPHA4_EXT 0x8046 17 GL_LUMINANCE12_ALPHA12_EXT 0x8047 18 GL_LUMINANCE16_ALPHA16_EXT 0x8048 19 GL_INTENSITY_EXT 0x8049 20 GL_INTENSITY4_EXT 0x804A 21 GL_INTENSITY8_EXT 0x804B 22 GL_INTENSITY12_EXT 0x804C 23 GL_INTENSITY16_EXT 0x804D 24 GL_RGB2_EXT 0x804E 25 GL_RGB4_EXT 0x804F 26 GL_RGB5_EXT 0x8050 27 GL_RGB8_EXT 0x8051 28 GL_RGB10_EXT 0x8052 29 GL_RGB12_EXT 0x8053 30 GL_RGB16_EXT 0x8054 31 GL_RGBA2_EXT 0x8055 32 GL_RGBA4_EXT 0x8056 33 GL_RGB5_A1_EXT 0x8057 34 GL_RGBA8_EXT 0x8058 35 GL_RGB10_A2_EXT 0x8059 36 GL_RGBA12_EXT 0x805A 37 GL_RGBA16_EXT 0x805B 38 GL_TEXTURE_RED_SIZE_EXT 0x805C 39 GL_TEXTURE_GREEN_SIZE_EXT 0x805D 40 GL_TEXTURE_BLUE_SIZE_EXT 0x805E 41 GL_TEXTURE_ALPHA_SIZE_EXT 0x805F 42 GL_TEXTURE_LUMINANCE_SIZE_EXT 0x8060 43 GL_TEXTURE_INTENSITY_SIZE_EXT 0x8061 44 GL_REPLACE_EXT 0x8062 45 GL_PROXY_TEXTURE_1D_EXT 0x8063 46 GL_PROXY_TEXTURE_2D_EXT 0x8064 47