GL_NV_copy_depth_to_color
https://www.khronos.org/registry/OpenGL/extensions/NV/NV_copy_depth_to_color.txt
GL_NV_copy_depth_to_color

	GL_DEPTH_STENCIL_TO_RGBA_NV 0x886E
	GL_DEPTH_STENCIL_TO_BGRA_NV 0x886F
