private void CopyCommon(RenderTargetBitmap sourceBitmap)
{
_bitmapInit.BeginInit();
_pixelWidth = sourceBitmap._pixelWidth;
_pixelHeight = sourceBitmap._pixelHeight;
_dpiX = sourceBitmap._dpiX;
_dpiY = sourceBitmap._dpiY;
_format = sourceBitmap._format;
//
// In order to make a deep clone we need to
// create a new bitmap with the contents of the
// existing bitmap and then create a render target
// from the new bitmap.
//
using (FactoryMaker myFactory = new FactoryMaker())
{
// Create an IWICBitmap
BitmapSourceSafeMILHandle newBitmapHandle = BitmapSource.CreateCachedBitmap(
null,
WicSourceHandle,
BitmapCreateOptions.PreservePixelFormat,
BitmapCacheOption.OnLoad,
null);
lock (_syncObject)
{
WicSourceHandle = newBitmapHandle;
}
// Now create a Render target from that Bitmap
HRESULT.Check(UnsafeNativeMethods.MILFactory2.CreateBitmapRenderTargetForBitmap(
myFactory.FactoryPtr,
newBitmapHandle,
out _renderTargetBitmap
));
}
_bitmapInit.EndInit();
}