Example #1
0
File: xlib.go Project: evmar/smash
// Repaint paints the backing store onto the X window.
func (win *Window) repaint(x, y, w, h int) {
	cr := cairo.Create(win.winSurface.Surface)
	cr.Rectangle(float64(x), float64(y), float64(w), float64(h))
	cr.Clip()
	if flip {
		cr.SetSourceRGB(1, 0, 0)
	} else {
		cr.SetSourceSurface(win.bufSurface.Surface, 0, 0)
		// TODO clip to exposed area?
		cr.SetOperator(cairo.OperatorSource)
	}
	// flip = !flip
	cr.Paint()
}
Example #2
0
File: xlib.go Project: evmar/smash
// Loop runs the main X loop.
func (dpy *Display) Loop(uwin ui.Win) {
	win := uwin.(*Window)
	awaitEvent := make(chan bool)
	go func() {
		xfd := int(C.XConnectionNumber(dpy.dpy))
		for {
			<-awaitEvent
			err := waitUntilReadable(xfd)
			if err != nil {
				log.Fatalf("select %#v", err)
			}
			dpy.eventReady <- true
		}
	}()

	C.XFlush(dpy.dpy)
	awaitEvent <- true
	draw := false
	for {
		nextFrame := dpy.anims.NextFrame(draw)
		select {
		case <-dpy.eventReady:
			dpy.processXEvents(win)
			awaitEvent <- true
		case <-dpy.drawReady:
			draw = true
		case t := <-nextFrame:
			dpy.anims.Run()
			// log.Printf("draw %s", t)
			t = t
			cr := cairo.Create(win.bufSurface.Surface)
			win.delegate.Draw(cr)
			win.repaint(0, 0, win.width, win.height)
			C.XSync(dpy.dpy, 0)
			draw = false
		case f := <-dpy.funcs:
			f()
		case <-dpy.quit:
			return
		}
	}
}
Example #3
0
File: xlib.go Project: evmar/smash
// Resize handles a resize of the window.
func (win *Window) resize(w, h int) {
	if win.width == w && win.height == h {
		return
	}
	win.width, win.height = w, h

	if win.winSurface == nil {
		visual := C.XDefaultVisual(win.dpy.dpy, 0)
		win.winSurface = cairo.XlibSurfaceCreate(
			unsafe.Pointer(win.dpy.dpy), uint64(win.xw), unsafe.Pointer(visual),
			w, h)
	} else {
		win.winSurface.SetSize(w, h)
	}
	win.bufSurface = &cairo.XlibSurface{win.winSurface.CreateSimilar(cairo.ContentColor, w, h)}

	cr := cairo.Create(win.bufSurface.Surface)
	win.delegate.Draw(cr)
	win.repaint(0, 0, w, h)
}