private DeleteObject ( |
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hObject | ||
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public static Bitmap CopyHBitmapToBitmap(IntPtr nativeHBitmap) { // Get width, height and the address of the pixel data for the native HBitmap BITMAP bitmapStruct = new BITMAP(); ShellNativeMethods.GetObjectBitmap(nativeHBitmap, Marshal.SizeOf(bitmapStruct), ref bitmapStruct); // Create a managed bitmap that has its pixel data pointing to the pixel data of the native HBitmap // No memory is allocated for its pixel data Bitmap managedBitmapPointer = new Bitmap( bitmapStruct.bmWidth, bitmapStruct.bmHeight, bitmapStruct.bmWidth * 4, PixelFormat.Format32bppArgb, bitmapStruct.bmBits); // Create a managed bitmap and allocate memory for pixel data Bitmap managedBitmapReal = new Bitmap(bitmapStruct.bmWidth, bitmapStruct.bmHeight, PixelFormat.Format32bppArgb); // Copy the pixels of the native HBitmap into the canvas of the managed bitmap Graphics graphics = Graphics.FromImage(managedBitmapReal); graphics.DrawImage(managedBitmapPointer, 0, 0); graphics.Dispose(); // Delete the native HBitmap object and free memory ShellNativeMethods.DeleteObject(nativeHBitmap); // Return the managed bitmap, clone of the native HBitmap, with correct transparency return(managedBitmapReal); }
private Bitmap GetBitmap(System.Windows.Size size) { IntPtr hBitmap = GetHBitmap(size); // return a System.Drawing.Bitmap from the hBitmap Bitmap returnValue = Bitmap.FromHbitmap(hBitmap); // delete HBitmap to avoid memory leaks ShellNativeMethods.DeleteObject(hBitmap); return(returnValue); }
private BitmapSource GetBitmapSource(System.Windows.Size size) { IntPtr hBitmap = GetHBitmap(size); // return a System.Media.Imaging.BitmapSource // Use interop to create a BitmapSource from hBitmap. BitmapSource returnValue = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, System.Windows.Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()); // delete HBitmap to avoid memory leaks ShellNativeMethods.DeleteObject(hBitmap); return(returnValue); }