GLX_MESA_query_renderer
http://www.opengl.org/registry/specs/MESA/glx_query_renderer.txt
GLX_MESA_query_renderer
	GLX_RENDERER_VENDOR_ID_MESA 0x8183
	GLX_RENDERER_DEVICE_ID_MESA 0x8184
	GLX_RENDERER_VERSION_MESA 0x8185
	GLX_RENDERER_ACCELERATED_MESA 0x8186
	GLX_RENDERER_VIDEO_MEMORY_MESA 0x8187
	GLX_RENDERER_UNIFIED_MEMORY_ARCHITECTURE_MESA 0x8188
	GLX_RENDERER_PREFERRED_PROFILE_MESA 0x8189
	GLX_RENDERER_OPENGL_CORE_PROFILE_VERSION_MESA 0x818A
	GLX_RENDERER_OPENGL_COMPATIBILITY_PROFILE_VERSION_MESA 0x818B
	GLX_RENDERER_OPENGL_ES_PROFILE_VERSION_MESA 0x818C
	GLX_RENDERER_OPENGL_ES2_PROFILE_VERSION_MESA 0x818D
	GLX_RENDERER_ID_MESA 0x818E
	Bool glXQueryCurrentRendererIntegerMESA (int attribute, unsigned int* value)
	const char* glXQueryCurrentRendererStringMESA (int attribute)
	Bool glXQueryRendererIntegerMESA (Display* dpy, int screen, int renderer, int attribute, unsigned int *value)
	const char* glXQueryRendererStringMESA (Display *dpy, int screen, int renderer, int attribute)