| GL_EXT_packed_pixels | |
| http://oss.sgi.com/projects/ogl-sample/registry/EXT/packed_pixels.txt | |
| GL_UNSIGNED_BYTE_3_3_2_EXT 0x8032 | |
| GL_UNSIGNED_SHORT_4_4_4_4_EXT 0x8033 | |
| GL_UNSIGNED_SHORT_5_5_5_1_EXT 0x8034 | |
| GL_UNSIGNED_INT_8_8_8_8_EXT 0x8035 | |
| GL_UNSIGNED_INT_10_10_10_2_EXT 0x8036 |