Function queryContextTest

server/fakerut.cpp:1247–1294

void queryContextTest(Display *dpy, XVisualInfo *vis, GLXFBConfig config)
{
	GLXContext ctx = 0;  int fbcid, temp;
	try
	{
		int visual_caveat;
		GET_CFG_ATTRIB(config, GLX_CONFIG_CAVEAT, visual_caveat);
		if(visual_caveat == GLX_NON_CONFORMANT_CONFIG) return;
		fbcid = cfgid(dpy, config);

		if(!(ctx = glXCreateNewContext(dpy, config, GLX_RGBA_TYPE, NULL, True)))
			THROWNL("glXCreateNewContext");
		temp = -20;
		glXQueryContext(dpy, ctx, GLX_FBCONFIG_ID, &temp);
		if(temp != fbcid) THROWNL("glXQueryContext FB cfg ID");
		glXDestroyContext(dpy, ctx);  ctx = 0;

		if(!(ctx = glXCreateContext(dpy, vis, NULL, True)))
			THROWNL("glXCreateNewContext");
		temp = -20;
		glXQueryContext(dpy, ctx, GLX_FBCONFIG_ID, &temp);
		if(temp != fbcid) THROWNL("glXQueryContext FB cfg ID");
		temp = -20;
		glXQueryContext(dpy, ctx, GLX_RENDER_TYPE, &temp);
		if(temp != GLX_RGBA_TYPE) THROWNL("glXQueryContext render type");
		temp = -20;
		glXQueryContext(dpy, ctx, GLX_SCREEN, &temp);
		if(temp != DefaultScreen(dpy)) THROWNL("glXQueryContext screen");

		if(GLX_EXTENSION_EXISTS(GLX_EXT_import_context))
		{
			temp = -20;
			glXQueryContextInfoEXT(dpy, ctx, GLX_SCREEN_EXT, &temp);
			if(temp != DefaultScreen(dpy)) THROWNL("glXQueryContextInfoEXT screen");
			temp = -20;
			glXQueryContextInfoEXT(dpy, ctx, GLX_VISUAL_ID_EXT, &temp);
			if((VisualID)temp != vis->visualid)
				THROWNL("glXQueryContextInfoEXT visual ID");
		}

		glXDestroyContext(dpy, ctx);
	}
	catch(...)
	{
		if(ctx) glXDestroyContext(dpy, ctx);
		throw;
	}
}


GLXFBConfig getFBConfigFromVisual(Display *dpy, XVisualInfo *vis)