protected override bool OnDamageEvent(Gdk.EventExpose evnt)
{
if (canvas_child == null || !canvas_child.Visible || !Visible || !IsMapped)
{
return(true);
}
Cairo.Context cr = Gdk.CairoHelper.Create(evnt.Window);
context.Context = cr;
for (int i = 0; i < evnt.Region.NumRectangles; i++)
{
var damage = evnt.Region.GetRectangle(i);
cr.Rectangle(damage.X, damage.Y, damage.Width, damage.Height);
cr.Clip();
cr.Translate(Allocation.X, Allocation.Y);
canvas_child.Render(context);
cr.Translate(-Allocation.X, -Allocation.Y);
if (Debug)
{
cr.LineWidth = 1.0;
cr.SetSourceColor(CairoExtensions.RgbToColor(
(uint)(rand = rand ?? new Random()).Next(0, 0xffffff)));
cr.Rectangle(damage.X + 0.5, damage.Y + 0.5, damage.Width - 1, damage.Height - 1);
cr.Stroke();
}
cr.ResetClip();
}
CairoExtensions.DisposeContext(cr);
if (fps.Update())
{
// Console.WriteLine ("FPS: {0}", fps.FramesPerSecond);
}
return(true);
}
protected override bool OnDrawn(Cairo.Context cr)
{
if (canvas_child == null || !canvas_child.Visible || !Visible || !IsMapped)
{
return(true);
}
foreach (Gdk.Rectangle damage in evnt.Region.GetRectangles())
{
cr.Rectangle(damage.X, damage.Y, damage.Width, damage.Height);
cr.Clip();
cr.Translate(Allocation.X, Allocation.Y);
canvas_child.Render(cr);
cr.Translate(-Allocation.X, -Allocation.Y);
if (Debug)
{
cr.LineWidth = 1.0;
cr.Color = CairoExtensions.RgbToColor(
(uint)(rand = rand ?? new Random()).Next(0, 0xffffff));
cr.Rectangle(damage.X + 0.5, damage.Y + 0.5, damage.Width - 1, damage.Height - 1);
cr.Stroke();
}
cr.ResetClip();
}
CairoExtensions.DisposeContext(cr);
if (fps.Update())
{
// Console.WriteLine ("FPS: {0}", fps.FramesPerSecond);
}
return(true);
}