GL_AMD_debug_output
http://www.opengl.org/registry/specs/AMD/debug_output.txt
GL_AMD_debug_output
	GL_MAX_DEBUG_MESSAGE_LENGTH_AMD 0x9143
	GL_MAX_DEBUG_LOGGED_MESSAGES_AMD 0x9144
	GL_DEBUG_LOGGED_MESSAGES_AMD 0x9145
	GL_DEBUG_SEVERITY_HIGH_AMD 0x9146
	GL_DEBUG_SEVERITY_MEDIUM_AMD 0x9147
	GL_DEBUG_SEVERITY_LOW_AMD 0x9148
	GL_DEBUG_CATEGORY_API_ERROR_AMD 0x9149
	GL_DEBUG_CATEGORY_WINDOW_SYSTEM_AMD 0x914A
	GL_DEBUG_CATEGORY_DEPRECATION_AMD 0x914B
	GL_DEBUG_CATEGORY_UNDEFINED_BEHAVIOR_AMD 0x914C
	GL_DEBUG_CATEGORY_PERFORMANCE_AMD 0x914D
	GL_DEBUG_CATEGORY_SHADER_COMPILER_AMD 0x914E
	GL_DEBUG_CATEGORY_APPLICATION_AMD 0x914F
	GL_DEBUG_CATEGORY_OTHER_AMD 0x9150
	void glDebugMessageCallbackAMD (GLDEBUGPROCAMD callback, void* userParam)
	void glDebugMessageEnableAMD (GLenum category, GLenum severity, GLsizei count, const GLuint* ids, GLboolean enabled)
	void glDebugMessageInsertAMD (GLenum category, GLenum severity, GLuint id, GLsizei length, const GLchar* buf)
	GLuint glGetDebugMessageLogAMD (GLuint count, GLsizei bufsize, GLenum* categories, GLuint* severities, GLuint* ids, GLsizei* lengths, GLchar* message)
	typedef void (APIENTRY *GLDEBUGPROCAMD)(GLuint id, GLenum category, GLenum severity, GLsizei length, const GLchar* message, GLvoid* userParam)