protected override void OnDraw(Canvas canvas)
{
base.OnDraw(canvas);
if (designMode)
{
return;
}
// bail out if the view is not actually visible
if (Visibility != Visibility.Visible || !isVisible)
{
surfaceFactory.FreeBitmap();
return;
}
// create a skia surface
var surface = surfaceFactory.CreateSurface(out var info);
if (surface == null)
{
return;
}
// draw using SkiaSharp
OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info));
// draw the surface to the view
surfaceFactory.DrawSurface(surface, canvas);
}
protected override void OnDraw(Canvas canvas)
{
base.OnDraw(canvas);
if (designMode)
{
return;
}
// bail out if the view is not actually visible
if (Visibility != Visibility.Visible || !isVisible)
{
surfaceFactory.FreeBitmap();
return;
}
// create a skia surface
var surface = surfaceFactory.CreateSurface(out var info);
if (surface == null)
{
CanvasSize = SKSize.Empty;
return;
}
var userVisibleSize = IgnorePixelScaling
? new SKSizeI((int)ActualWidth, (int)ActualHeight)
: info.Size;
CanvasSize = userVisibleSize;
if (IgnorePixelScaling)
{
var skiaCanvas = surface.Canvas;
skiaCanvas.Scale((float)Dpi);
skiaCanvas.Save();
}
// draw using SkiaSharp
OnPaintSurface(new SKPaintSurfaceEventArgs(surface, info.WithSize(userVisibleSize), info));
// draw the surface to the view
surfaceFactory.DrawSurface(surface, canvas);
}