Function subWinTest

server/fakerut.cpp:2821–3001

// subwindows

int subWinTest(void)
{
	Display *dpy = NULL;  Window win = 0, win1 = 0, win2 = 0;
	#ifdef FAKEXCB
	xcb_connection_t *conn = NULL;
	#endif
	TestColor clr(0);
	int dpyw, dpyh, retval = 1, lastFrame = 0;
	int glxattribs[] = { GLX_DOUBLEBUFFER, GLX_RGBA, GLX_RED_SIZE, 8,
		GLX_GREEN_SIZE, 8, GLX_BLUE_SIZE, 8, None };
	XVisualInfo *vis = NULL;
	GLXContext ctx = 0;
	XSetWindowAttributes swa;

	printf("Subwindow destruction test:\n\n");

	try
	{
		try
		{
			for(int i = 0; i < 20; i++)
			{
				if(!dpy && !(dpy = XOpenDisplay(0)))
					THROW("Could not open display");
				dpyw = DisplayWidth(dpy, DefaultScreen(dpy));
				dpyh = DisplayHeight(dpy, DefaultScreen(dpy));

				if((vis = glXChooseVisual(dpy, DefaultScreen(dpy),
					glxattribs)) == NULL)
					THROW("Could not find a suitable visual");

				Window root = RootWindow(dpy, DefaultScreen(dpy));
				swa.colormap = XCreateColormap(dpy, root, vis->visual, AllocNone);
				swa.border_pixel = 0;
				swa.background_pixel = 0;
				swa.event_mask = 0;
				if(!win && (win = XCreateWindow(dpy, root, 0, 0, dpyw / 2, dpyh / 2, 0,
					vis->depth, InputOutput, vis->visual,
					CWBorderPixel | CWColormap | CWEventMask, &swa)) == 0)
					THROW("Could not create window");
				if((win1 = XCreateWindow(dpy, win, 0, 0, dpyw / 2, dpyh / 2, 0,
					vis->depth, InputOutput, vis->visual,
					CWBorderPixel | CWColormap | CWEventMask, &swa)) == 0)
					THROW("Could not create subwindow");
				if((win2 = XCreateWindow(dpy, win1, 0, 0, dpyw / 2, dpyh / 2, 0,
					vis->depth, InputOutput, vis->visual,
					CWBorderPixel | CWColormap | CWEventMask, &swa)) == 0)
					THROW("Could not create subwindow");
				XMapSubwindows(dpy, win);
				XMapWindow(dpy, win);

				lastFrame = 0;
				if(!(ctx = glXCreateContext(dpy, vis, NULL, True)))
					THROW("Could not create context");
				XFree(vis);  vis = NULL;
				if(!(glXMakeCurrent(dpy, win2, ctx)))
					THROWNL("Could not make context current");
				clr.clear(GL_BACK);