GL_APPLE_framebuffer_multisample
https://www.khronos.org/registry/OpenGL/extensions/APPLE/APPLE_framebuffer_multisample.txt
GL_APPLE_framebuffer_multisample

	GL_DRAW_FRAMEBUFFER_BINDING_APPLE 0x8CA6
	GL_READ_FRAMEBUFFER_APPLE 0x8CA8
	GL_DRAW_FRAMEBUFFER_APPLE 0x8CA9
	GL_READ_FRAMEBUFFER_BINDING_APPLE 0x8CAA
	GL_RENDERBUFFER_SAMPLES_APPLE 0x8CAB
	GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_APPLE 0x8D56
	GL_MAX_SAMPLES_APPLE 0x8D57
	void glRenderbufferStorageMultisampleAPPLE (GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height)
	void glResolveMultisampleFramebufferAPPLE (void)