public HRESULT GetThumbnailByID(WTS_THUMBNAILID thumbnailID, uint cxyRequestedThumbSize, ISharedBitmap **ppvThumb, WTS_CACHEFLAGS *pOutFlags) { return(((delegate * unmanaged <IThumbnailCache *, WTS_THUMBNAILID, uint, ISharedBitmap **, WTS_CACHEFLAGS *, int>)(lpVtbl[4]))((IThumbnailCache *)Unsafe.AsPointer(ref this), thumbnailID, cxyRequestedThumbSize, ppvThumb, pOutFlags)); }
private static ImageData LoadThumbnail(string path, DateTime dtLastWriteTime, out Size sizeRaw, out Size sizeActual, out string toolTipText, out bool fCached) { sizeRaw = sizeActual = Size.Empty; toolTipText = null; fCached = false; IntPtr zero = IntPtr.Zero; IShellItem ppsi = null; ISharedBitmap ppvThumb = null; LocalThumbnailCache o = null; try { zero = PInvoke.ILCreateFromPath(path); if ((zero != IntPtr.Zero) && (PInvoke.SHCreateShellItem(IntPtr.Zero, null, zero, out ppsi) == 0)) { o = new LocalThumbnailCache(); IThumbnailCache cache2 = (IThumbnailCache)o; uint flags = 0; uint pOutFlags = 0; WTS_THUMBNAILID pThumbnailID = new WTS_THUMBNAILID(); uint cxyRequestedThumbSize = (uint)Math.Min(0x400, Math.Min(QTUtility.PreviewMaxWidth, QTUtility.PreviewMaxHeight)); if (cache2.GetThumbnail(ppsi, cxyRequestedThumbSize, flags, out ppvThumb, ref pOutFlags, ref pThumbnailID) == 0) { IntPtr ptr2; if ((pOutFlags & 2) == 2) { fCached = true; } if (ppvThumb.Detach(out ptr2) == 0) { Bitmap bmp = Image.FromHbitmap(ptr2); Size size = bmp.Size; sizeRaw = sizeActual = size; ImageData data = new ImageData(bmp, null, path, dtLastWriteTime, size, size); data.Thumbnail = true; try { toolTipText = data.TooltipText = ShellMethods.GetShellInfoTipText(zero, false); } catch { } return(data); } } } } catch (Exception exception) { QTUtility2.MakeErrorLog(exception, null); } finally { if (zero != IntPtr.Zero) { PInvoke.CoTaskMemFree(zero); } if (ppsi != null) { Marshal.ReleaseComObject(ppsi); } if (ppvThumb != null) { Marshal.ReleaseComObject(ppvThumb); } if (o != null) { Marshal.ReleaseComObject(o); } } return(null); }