CODEWITHSUNDEEP
wpfbitmapbitmapsource
user25749
user25749

Reputation: 4885

Is BitmapSource the only type can be used in Image Source?

We can use Bitmapsource object as the content of a Image control, However if I only have Bitmap object, can I use it directly, if I convert Bitmap to Bitmapsouce using the following method:

        Bitmap bitmap = imageObjToBeConvert;
        IntPtr HBitmap = bitmap.GetHbitmap();
        result = Imaging.CreateBitmapSourceFromHBitmap
            (HBitmap,
            IntPtr.Zero,
            Int32Rect.Empty,
            BitmapSizeOptions.FromEmptyOptions());
        DeleteObject(HBitmap);
        bitmap.Dispose();

It take some time. Is there any way to use Bitmap directly?

And I found BitmapSource seems can't be released directly, Is there a sample method to release the memory immediately, after the Bitmapsouce is not used again.

Upvotes: 2

Views: 3288

Answers (2)

Joel B Fant
Joel B Fant

Reputation: 24756

No, you cannot use Bitmap directly. This is because System.Drawing.Bitmap is a GDI+ bitmap, while classes like BitmapImage in System.Windows.Media.Imaging are D3D/DirectX.

Regarding memory usage, you can't release it directly, but there is usually some sort of caching that goes in the background. There are ways that you can load a BitmapImage so that it ignores the cache.

Upvotes: 1

FlySwat
FlySwat

Reputation: 175583

  • System.Windows.Media.Imaging..::.BitmapFrame
  • System.Windows.Media.Imaging..::.BitmapImage
  • System.Windows.Media.Imaging..::.CachedBitmap
  • System.Windows.Media.Imaging..::.ColorConvertedBitmap
  • System.Windows.Media.Imaging..::.CroppedBitmap
  • System.Windows.Media.Imaging..::.FormatConvertedBitmap
  • System.Windows.Media.Imaging..::.RenderTargetBitmap
  • System.Windows.Media.Imaging..::.TransformedBitmap
  • System.Windows.Media.Imaging..::.WriteableBitmap

All of these classes inherit from BitMapSource, so any of them could be used in that context.

Upvotes: 1

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