GL_APPLE_rgb_422
https://www.khronos.org/registry/OpenGL/extensions/APPLE/APPLE_rgb_422.txt
GL_APPLE_rgb_422

	GL_UNSIGNED_SHORT_8_8_APPLE 0x85BA
	GL_UNSIGNED_SHORT_8_8_REV_APPLE 0x85BB
	GL_RGB_422_APPLE 0x8A1F
	GL_RGB_RAW_422_APPLE 0x8A51