private Bitmap Extract(int width, int height, IEIFLAG flags, bool scale, bool aspect)
{
IntPtr zero = IntPtr.Zero;
SIZE sIZE = default(SIZE);
sIZE.cx = width;
sIZE.cy = height;
PixelFormat bgra = PixelFormats.Bgra32;
BitmapPalette halftone256Transparent = BitmapPalettes.Halftone256Transparent;
int num = (width * bgra.BitsPerPixel + 7) / 8;
byte[] pixels = new byte[num * height];
BitmapSource bmpSrc = BitmapSource.Create(width, height, 96.0, 96.0, bgra, halftone256Transparent, pixels, num);
try
{
if (this._extractImage != null)
{
StringBuilder stringBuilder = new StringBuilder(260);
int num2 = 0;
this.hResult = this._extractImage.GetLocation(stringBuilder, stringBuilder.Capacity, ref num2, ref sIZE, 32, ref flags);
if (this.hResult != 0)
{
Marshal.ThrowExceptionForHR(this.hResult);
}
this.hResult = this._extractImage.Extract(out zero);
if (this.hResult != 0)
{
Marshal.ThrowExceptionForHR(this.hResult);
}
BitmapSource bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(zero, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
if (scale && (bitmapSource.PixelHeight != sIZE.cy || bitmapSource.PixelWidth != sIZE.cx))
{
return(this.BmpFromBmpSource(ShellMgr.ScaleImage(bitmapSource, sIZE.cx, sIZE.cy, aspect)));
}
return(this.BmpFromBmpSource(bitmapSource));
}
return(this.BmpFromBmpSource(bmpSrc));
}
catch (COMException)
{
return(this.BmpFromBmpSource(bmpSrc));
}
catch (Exception)
{
return(this.BmpFromBmpSource(bmpSrc));
}
finally
{
if (zero != IntPtr.Zero)
{
Marshal.Release(zero);
}
}
}
private void GenerateIExtractImage()
{
try
{
ShellMgr.SHGetDesktopFolder(out this._desktopFolder);
int num = 0;
int num2 = 0;
this.hResult = this._desktopFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, System.IO.Path.GetDirectoryName(this._path), out num2, out this._folderPidl, out num);
if (this.hResult != 0)
{
Marshal.ThrowExceptionForHR(this.hResult);
}
this.hResult = this._desktopFolder.BindToObject(this._folderPidl, IntPtr.Zero, ref this.iidShellFolder, ref this._folder);
if (this.hResult != 0)
{
Marshal.ThrowExceptionForHR(this.hResult);
}
this.hResult = this._folder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, System.IO.Path.GetFileName(this._path), out num2, out this._filePidl, out num);
if (this.hResult != 0)
{
Marshal.ThrowExceptionForHR(this.hResult);
}
IUnknown unknown = null;
this.hResult = this._folder.GetUIObjectOf(IntPtr.Zero, 1, ref this._filePidl, ref this.iidExtractImage, out this._reserved, ref unknown);
if (this.hResult != 0)
{
Marshal.ThrowExceptionForHR(this.hResult);
}
this._extractImage = (IExtractImage)unknown;
}
catch (FileNotFoundException)
{
}
catch (COMException)
{
}
catch (Exception)
{
}
}
