Method xlib>

cube/cube.cpp:3210–3244

template <>
void Demo::create_window<WsiPlatform::xlib>() {
    const char *display_envar = getenv("DISPLAY");
    if (display_envar == nullptr || display_envar[0] == '\0') {
        printf("Environment variable DISPLAY requires a valid value.\nExiting ...\n");
        fflush(stdout);
        exit(1);
    }

    XInitThreads();
    xlib_display = XOpenDisplay(nullptr);
    long visualMask = VisualScreenMask;
    int numberOfVisuals;
    XVisualInfo vInfoTemplate = {};
    vInfoTemplate.screen = DefaultScreen(xlib_display);
    XVisualInfo *visualInfo = XGetVisualInfo(xlib_display, visualMask, &vInfoTemplate, &numberOfVisuals);

    Colormap colormap =
        XCreateColormap(xlib_display, RootWindow(xlib_display, vInfoTemplate.screen), visualInfo->visual, AllocNone);

    XSetWindowAttributes windowAttributes = {};
    windowAttributes.colormap = colormap;
    windowAttributes.background_pixel = 0xFFFFFFFF;
    windowAttributes.border_pixel = 0;
    windowAttributes.event_mask = KeyPressMask | KeyReleaseMask | StructureNotifyMask | ExposureMask;

    xlib_window =
        XCreateWindow(xlib_display, RootWindow(xlib_display, vInfoTemplate.screen), 0, 0, width, height, 0, visualInfo->depth,
                      InputOutput, visualInfo->visual, CWBackPixel | CWBorderPixel | CWEventMask | CWColormap, &windowAttributes);

    XSelectInput(xlib_display, xlib_window, ExposureMask | KeyPressMask);
    XMapWindow(xlib_display, xlib_window);
    XFlush(xlib_display);
    xlib_wm_delete_window = XInternAtom(xlib_display, "WM_DELETE_WINDOW", False);
    XSetWMProtocols(xlib_display, xlib_window, &xlib_wm_delete_window, 1);
}

void Demo::handle_xlib_event(const XEvent *event) {
    switch (event->type) {