GL_AMD_occlusion_query_event
http://www.opengl.org/registry/specs/AMD/occlusion_query_event.txt
GL_AMD_occlusion_query_event

	GL_QUERY_DEPTH_PASS_EVENT_BIT_AMD 0x00000001
	GL_QUERY_DEPTH_FAIL_EVENT_BIT_AMD 0x00000002
	GL_QUERY_STENCIL_FAIL_EVENT_BIT_AMD 0x00000004
	GL_QUERY_DEPTH_BOUNDS_FAIL_EVENT_BIT_AMD 0x00000008
	GL_OCCLUSION_QUERY_EVENT_MASK_AMD 0x874F
	GL_QUERY_ALL_EVENT_BITS_AMD 0xFFFFFFFF
	void glQueryObjectParameteruiAMD (GLenum target, GLuint id, GLenum pname, GLuint param)
