public BitmapSource GetTransparentImageSource(Rectangle section, bool flipX = false, bool flipY = false)
{
BitmapSource source;
Bitmap bmp;
if (TransparentSourceCache.TryGetValue(new CacheKey(section, flipX, flipY), out source))
{
return(source);
}
else
{
bmp = CropImage(TransparentBitmap, section);
if (flipX)
{
bmp.RotateFlip(RotateFlipType.RotateNoneFlipX);
}
if (flipY)
{
bmp.RotateFlip(RotateFlipType.RotateNoneFlipY);
}
source = Extensions.ImageExtensions.ToBitmapSource(bmp);
TransparentSourceCache.Add(new CacheKey(section, flipX, flipY), source);
return(source);
}
}
private void DisposeOpaqueSourceCache()
{
if (null == TransparentSourceCache)
{
return;
}
TransparentSourceCache.Clear();
}