1GL_EXT_packed_depth_stencil 2http://www.opengl.org/registry/specs/EXT/packed_depth_stencil.txt 3GL_EXT_packed_depth_stencil 4 GL_DEPTH_STENCIL_EXT 0x84F9 5 GL_UNSIGNED_INT_24_8_EXT 0x84FA 6 GL_DEPTH24_STENCIL8_EXT 0x88F0 7 GL_TEXTURE_STENCIL_SIZE_EXT 0x88F1 8