private void CalculateLayout(int width, int height)
{
rectView.Reset();
rectView.AddRect(0f, 0f, 1f * Width, 1f * Height, Path.Direction.Cw);
if (clipManager != null)
{
if (width > 0 && height > 0)
{
clipManager.SetupClipLayout(width, height);
clipPath.Reset();
clipPath.Set(clipManager.CreateMask(width, height));
if (RequiresBitmap())
{
if (clipBitmap != null)
{
clipBitmap.Recycle();
}
clipBitmap = Bitmap.CreateBitmap(width, height, Bitmap.Config.Argb8888);
Canvas canvas = new Canvas(clipBitmap);
if (drawable != null)
{
drawable.SetBounds(0, 0, width, height);
drawable.Draw(canvas);
}
else
{
canvas.DrawPath(clipPath, clipManager.GetPaint());
}
}
//invert the path for android P
if (Build.VERSION.SdkInt > BuildVersionCodes.OMr1)
{
bool success = rectView.InvokeOp(clipPath, Path.Op.Difference);
}
//this needs to be fixed for 25.4.0
if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop && ViewCompat.GetElevation(this) > 0f)
{
try
{
OutlineProvider = new CustomOutlineProvider(clipManager);
}
catch
{
//
}
}
}
}
PostInvalidate();
}
public void Draw(AView view, Canvas canvas, Action dispatchDraw)
{
if (PathProvider == null)
{
return;
}
InitializeClipPath(canvas.Width, canvas.Height);
var saveCount = canvas.SaveLayer(0, 0, canvas.Width, canvas.Height, null);
dispatchDraw();
canvas.DrawPath(_maskPath, _maskPaint);
canvas.RestoreToCount(saveCount);
if (Build.VERSION.SdkInt >= BuildVersionCodes.Lollipop && ViewCompat.GetElevation(view) > 0)
{
view.OutlineProvider = _clipPath.IsConvex ? new PathOutlineProvider(PathProvider) : null;
}
}