1GL_EXT_packed_depth_stencil 2https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_packed_depth_stencil.txt 3GL_EXT_packed_depth_stencil 4 5 GL_DEPTH_STENCIL_EXT 0x84F9 6 GL_UNSIGNED_INT_24_8_EXT 0x84FA 7 GL_DEPTH24_STENCIL8_EXT 0x88F0 8 GL_TEXTURE_STENCIL_SIZE_EXT 0x88F1 9