SKIKO_EXPORT KNativePointer org_jetbrains_skiko_tests_TestHelpers__1nCreateTestGlContext()

in skiko/src/nativeJsTest/cpp/TestHelpers.cc [107:149]

• 35 lines of code
• 2 McCabe index (conditional complexity)

SKIKO_EXPORT KNativePointer org_jetbrains_skiko_tests_TestHelpers__1nCreateTestGlContext() {
   const int glxContextAttribs[] {
        GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
        GLX_RENDER_TYPE, GLX_RGBA_BIT,
        GLX_DOUBLEBUFFER, True,
        GLX_RED_SIZE, 8,
        GLX_GREEN_SIZE, 8,
        GLX_BLUE_SIZE, 8,
        None
    };

    Display* display = XOpenDisplay(nullptr);
    SKIKO_ASSERT(display, "Failed to connect to Xserver");

    int numConfigs = 0;
    GLXFBConfig* fbConfigs = glXChooseFBConfig(display, DefaultScreen(display), glxContextAttribs, &numConfigs);
    SKIKO_ASSERT(fbConfigs != nullptr && numConfigs > 0, "No suitable fbconfig available");
    GLXFBConfig fbConfig = fbConfigs[0];
    XFree(fbConfigs);

    XVisualInfo* visual = glXGetVisualFromFBConfig(display, fbConfig);
    XSetWindowAttributes setWindowAttributes;
    setWindowAttributes.event_mask = StructureNotifyMask;
    setWindowAttributes.border_pixel = 0;
    setWindowAttributes.colormap = XCreateColormap(display, RootWindow(display, visual->screen), visual->visual, AllocNone);
    int setWindowAttributesMask = CWBorderPixel | CWColormap | CWEventMask;

    Window window = XCreateWindow(display, RootWindow(display, visual->screen),
        0, 0, 1280, 720, 0, visual->depth, InputOutput, visual->visual,
        setWindowAttributesMask, &setWindowAttributes);

    GLXWindow surface = glXCreateWindow(display, fbConfig, window, nullptr);
    SKIKO_ASSERT(surface, "Failed to create surface");

    GLXContext context = glXCreateNewContext(display, fbConfig, GLX_RGBA_TYPE, nullptr, True);
    SKIKO_ASSERT(context, "Failed to create context");

    XMapWindow(display, window);
    XEvent event;
    XIfEvent(display, &event, waitForWindow, (XPointer)window);

    return reinterpret_cast<KInteropPointer>(new SkikoTestGlContext { display, surface, context, window });
}