private void OnPaintSurface(object sender, SKNativePaintGLSurfaceEventArgs e)
{
var controller = Element as ISKGLViewController;
// the control is being repainted, let the user know
controller?.OnPaintSurface(new SKPaintGLSurfaceEventArgs(e.Surface, e.RenderTarget));
}
protected override void OnPaintSurface(SkiaSharp.Views.Android.SKPaintGLSurfaceEventArgs e)
{
//
// Start drawing
//
var del = Content;
if (del == null)
{
return;
}
var startT = DateTime.Now;
var _graphics = new SkiaGraphics(e.Surface);
_graphics.SaveState();
_graphics.Scale(Zoom, Zoom);
//
// Draw
//
del.Frame = new RectangleF(0, 0, Width / Zoom, Height / Zoom);
try {
del.Draw(_graphics);
}
catch (Exception) {
}
_graphics.RestoreState();
var endT = DateTime.Now;
_drawTime += (endT - startT).TotalSeconds;
_drawCount++;
//
// Throttle
//
if (_running && _drawCount > 2 && (DateTime.Now - _lastThrottleTime) >= ThrottleInterval)
{
_lastThrottleTime = DateTime.Now;
var maxfps = 1.0 / (_drawTime / _drawCount);
_drawTime = 0;
_drawCount = 0;
var fps = ClampUpdateFreq((int)(maxfps * CpuUtilization));
if (Math.Abs(fps - _fps) > 1)
{
_fps = fps;
Start();
}
}
//
// Notify
//
DrewFrame?.Invoke(this, EventArgs.Empty);
}