Graphics.Rendering.OpenGL.Raw.EXT.PackedPixels
glGetEXTPackedPixels
gl_EXT_packed_pixels
gl_UNSIGNED_BYTE_3_3_2_EXT
gl_UNSIGNED_INT_10_10_10_2_EXT
gl_UNSIGNED_INT_8_8_8_8_EXT
gl_UNSIGNED_SHORT_4_4_4_4_EXT
gl_UNSIGNED_SHORT_5_5_5_1_EXT