protected sealed override void OnPaint(PaintEventArgs e)
{
if (EnableDoubleBuffering)
{
var screen = ParentWindow.Screen;
var scale = screen.RealScale / screen.Scale;
renderSize = Size.Round(e.ClipRectangle.Size * scale);
if (bitmap == null ||
bitmap.Size.Width < renderSize.Width ||
bitmap.Size.Height < renderSize.Height)
{
if (bitmap != null)
bitmap.Dispose();
bitmap = new Bitmap(renderSize, PixelFormat.Format32bppRgba);
}
var bitmapGraphics = new Graphics(bitmap);
bitmapGraphics.Clear(Brushes.Cached(BackgroundColor));
bitmapGraphics.ScaleTransform(scale);
bitmapGraphics.TranslateTransform(-e.ClipRectangle.Location);
bitmapGraphics.SetClip(e.ClipRectangle * scale); // should be affected by transform
var childArgs = new PaintEventArgs(bitmapGraphics, e.ClipRectangle);
base.OnPaint(childArgs);
OnBufferedPaint(childArgs);
bitmapGraphics.Dispose();
bitmapGraphics = null;
e.Graphics.DrawImage(bitmap, new RectangleF(renderSize), e.ClipRectangle);
if (Platform.IsWpf)
{
// wpf runs out of resources fast here, so we garbage collect
GC.Collect();
}
}
else
{
base.OnPaint(e);
OnBufferedPaint(e);
}
}