public override HistoryMemento OnExecute(IHistoryWorkspace historyWorkspace)
{
historyWorkspace.VerifyAccess();
BitmapLayer layer = (BitmapLayer)historyWorkspace.Document.Layers[this.layerIndex];
Surface layerSurface = layer.Surface;
TileMathHelper tileMathHelper = new TileMathHelper(layerSurface.Width, layerSurface.Height, this.rendererTileEdgeLog2);
TileMathHelper tileGroupMathHelper = new TileMathHelper(layerSurface.Width, layerSurface.Height, this.rendererTileEdgeLog2 + 3);
HistoryMemento actionHM = null;
ManualResetEvent taskFinishedEvent = new ManualResetEvent(false);
ThreadTask <Unit> commitTask = historyWorkspace.TaskManager.StartNewThreadTask(delegate(Task task) {
SegmentedList <RectInt32> list = tileGroupMathHelper.EnumerateTilesClippedToSourceRect(this.rendererClipRect).ToSegmentedList <RectInt32>();
ListUtil.FisherYatesShuffle <RectInt32>(list);
ConcurrentQueue <ISurface <ColorBgra> > queue = new ConcurrentQueue <ISurface <ColorBgra> >();
ConcurrentQueue <RectInt32> changedTiles = new ConcurrentQueue <RectInt32>();
ConcurrentQueue <TupleStruct <RectInt32, ISurface <ColorBgra> > > changedTileGroups = new ConcurrentQueue <TupleStruct <RectInt32, ISurface <ColorBgra> > >();
double progressIncrement = 1.0 / ((double)Math.Max(1, list.Count));
task.Progress = 0.0;
Work.ParallelForEach <RectInt32>(WaitType.Blocking, list, delegate(RectInt32 tileGroupRect) {
ISurface <ColorBgra> dst = RetryManager.RunMemorySensitiveOperation <ISurfaceRef <ColorBgra> >(() => SurfaceAllocator.Bgra.Allocate <ColorBgra>(tileGroupRect.Size, AllocationOptions.ZeroFillNotRequired));
this.renderer.Render(dst, tileGroupRect.Location);
bool flag = false;
foreach (RectInt32 num in tileMathHelper.EnumerateTilesClippedToSourceRect(tileGroupRect))
{
RectInt32 bounds = RectInt32.Offset(num, -tileGroupRect.Location);
using (ISurface <ColorBgra> surface2 = layerSurface.CreateWindow(num))
{
using (ISurface <ColorBgra> surface3 = dst.CreateWindow <ColorBgra>(bounds))
{
if (!SurfaceBgraUtil.ArePixelsEqual(surface2, surface3))
{
flag = true;
changedTiles.Enqueue(num);
}
}
}
}
if (flag)
{
changedTileGroups.Enqueue(TupleStruct.Create <RectInt32, ISurface <ColorBgra> >(tileGroupRect, dst));
}
else
{
DisposableUtil.Free <ISurface <ColorBgra> >(ref dst);
}
task.IncrementProgressBy(progressIncrement);
}, WorkItemQueuePriority.Normal, null);
task.Progress = null;
if (changedTiles.Count == 0)
{
actionHM = null;
}
else
{
SegmentedList <RectInt32> scans = new SegmentedList <RectInt32>(changedTiles.Count, 7);
scans.AddRange(changedTiles);
ScansHelpers.SortScansByTopLeft(scans);
ScansHelpers.ConsolidateSortedScansInPlace(scans);
actionHM = new BitmapHistoryMemento(this.historyMementoName, this.historyMementoImage, historyWorkspace, this.layerIndex, scans);
this.EnterCriticalRegion();
Work.ParallelForEach <TupleStruct <RectInt32, ISurface <ColorBgra> > >(WaitType.Blocking, changedTileGroups, delegate(TupleStruct <RectInt32, ISurface <ColorBgra> > tileInfo) {
using (ISurface <ColorBgra> surface = layerSurface.CreateWindow(tileInfo.Item1))
{
tileInfo.Item2.Render(surface, PointInt32.Zero);
}
tileInfo.Item2.Dispose();
}, WorkItemQueuePriority.Normal, null);
foreach (RectInt32 num in scans)
{
layer.Invalidate(num);
}
}
}, ApartmentState.MTA);
commitTask.ResultAsync <Unit>().Receive(delegate(Result <Unit> r) {
taskFinishedEvent.Set();
}).Observe();
if (!taskFinishedEvent.WaitOne(this.delayUntilProgressDialogMs))
{
string headerText = PdnResources.GetString("ApplyRendererToBitmapLayerHistoryFunction.ProgressDialog.HeaderText");
string headerTextFormat = PdnResources.GetString("ApplyRendererToBitmapLayerHistoryFunction.ProgressDialog.HeaderText.Format");
using (TaskProgressDialog progressDialog = new TaskProgressDialog())
{
Action updateHeaderText = delegate {
progressDialog.VerifyAccess();
if (!progressDialog.IsDisposed)
{
string text1;
double?progress = commitTask.Progress;
if (!progress.HasValue)
{
text1 = headerText;
}
else
{
text1 = string.Format(headerTextFormat, (progress.Value * 100.0).ToString("N0"));
}
progressDialog.HeaderText = text1;
}
};
progressDialog.Text = this.historyMementoName;
progressDialog.Icon = this.historyMementoImage.Reference.ToIcon();
progressDialog.CloseOnFinished = true;
progressDialog.ShowCancelButton = false;
progressDialog.Task = commitTask;
updateHeaderText();
commitTask.ProgressChanged += delegate(object s, ValueEventArgs <double?> e) {
PdnSynchronizationContext.Instance.EnsurePosted(updateHeaderText);
};
progressDialog.ShowDialog(historyWorkspace.Window);
}
}
if (!commitTask.TaskResult.IsError)
{
return(actionHM);
}
if (commitTask.TaskResult.Error is OutOfMemoryException)
{
throw new OutOfMemoryException(null, commitTask.TaskResult.Error);
}
throw new AggregateException(null, commitTask.TaskResult.Error);
}