private unsafe void RenderTileWorkItem(PointInt32 tileOffset)
{
IBitmap <ColorPbgra32> bitmap;
bool isCancelled = false;
bool flag = false;
Exception error = null;
isCancelled |= this.IsTileRenderingCancelled(tileOffset);
if (isCancelled)
{
bitmap = null;
}
else
{
RectInt32 tileSourceRect = this.tileMathHelper.GetTileSourceRect(tileOffset);
SizeInt32 tileBufferSize = this.GetTileBufferSize(tileOffset);
bitmap = RetryManager.Eval <IBitmap <ColorPbgra32> >(3, () => BitmapAllocator.Pbgra32.Allocate(tileBufferSize, AllocationOptions.Default), delegate(Exception _) {
CleanupManager.RequestCleanup();
Thread.Sleep(200);
CleanupManager.WaitForPendingCleanup();
}, delegate(AggregateException ex) {
throw new AggregateException($"could not allocate a bitmap of size {tileBufferSize.Width} x {tileBufferSize.Height}", ex).Flatten();
});
if (this.source != null)
{
try
{
isCancelled |= this.IsTileRenderingCancelled(tileOffset);
if (!isCancelled)
{
using (IBitmapLock <ColorPbgra32> @lock = bitmap.Lock <ColorPbgra32>(BitmapLockOptions.ReadWrite))
{
if (this.mipLevel == 0)
{
this.source.CopyPixels(new RectInt32?(tileSourceRect), @lock);
RenderingKernels.ConvertBgra32ToPbgra32((uint *)@lock.Scan0, tileBufferSize.Width, tileBufferSize.Height, @lock.Stride);
flag = true;
}
else
{
BitmapInterpolationMode linear;
if (!this.isHighQuality)
{
linear = BitmapInterpolationMode.Linear;
}
else if (this.mipLevel == 1)
{
linear = BitmapInterpolationMode.Linear;
}
else
{
linear = BitmapInterpolationMode.Fant;
}
IImagingFactory instance = ImagingFactory.Instance;
ICancellationToken cancelToken = CancellationTokenUtil.Create((Func <bool>)(() => (isCancelled | this.IsTileRenderingCancelled(tileOffset))));
int copyHeightLog2 = Math.Max(3, 7 - this.mipLevel);
using (ClippedBitmapSource <ColorBgra32> source2 = new ClippedBitmapSource <ColorBgra32>(this.source, tileSourceRect))
{
using (CancellableBitmapSource <ColorBgra32> source3 = new CancellableBitmapSource <ColorBgra32>(source2, r => this.tileMathHelper.EnumerateTilesClippedToSourceRect(r), null, cancelToken))
{
using (IBitmapSource <ColorPbgra32> source4 = CreateBufferedTileScaler(instance, source3, tileBufferSize.Width, tileBufferSize.Height, linear))
{
using (CancellableBitmapSource <ColorPbgra32> source5 = new CancellableBitmapSource <ColorPbgra32>(source4, r => TileRectSplitter(r, ((int)1) << copyHeightLog2), null, cancelToken))
{
try
{
source5.CopyPixels <ColorPbgra32>(@lock);
flag = true;
}
catch (OperationCanceledException exception2)
{
error = exception2;
isCancelled = true;
}
catch (Exception exception3)
{
error = exception3;
throw;
}
}
}
}
}
}
isCancelled |= this.IsTileRenderingCancelled(tileOffset);
if (isCancelled)
{
flag = false;
}
}
if (!flag)
{
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref bitmap);
}
}
}
catch (OperationCanceledException exception4)
{
error = exception4;
isCancelled = true;
}
catch (Exception exception5)
{
error = exception5;
isCancelled |= this.IsTileRenderingCancelled(tileOffset);
if (!isCancelled)
{
using (IDrawingContext context = DrawingContext.FromBitmap(bitmap, FactorySource.PerThread))
{
context.Clear(new ColorRgba128Float?((ColorRgba128Float)Colors.White));
string text = exception5.ToString();
using (ISystemFonts fonts = new SystemFonts(true))
{
TextLayout textLayout = UIText.CreateLayout(context, text, fonts.Caption, null, HotkeyRenderMode.Ignore, (double)bitmap.Size.Width, 65535.0);
textLayout.FontSize *= 0.6;
textLayout.WordWrapping = WordWrapping.Wrap;
context.DrawTextLayout(PointDouble.Zero, textLayout, SolidColorBrushCache.Get((ColorRgba128Float)Colors.Black), DrawTextOptions.None);
}
}
flag = true;
}
}
}
}
isCancelled |= this.IsTileRenderingCancelled(tileOffset);
if (isCancelled)
{
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref bitmap);
}
RenderedTileInfo info = new RenderedTileInfo(bitmap, !isCancelled && (bitmap > null), error);
if (!this.tilesRenderedQueue.TryEnqueue(tileOffset, info))
{
ExceptionUtil.ThrowInternalErrorException("Could not enqueue to this.tilesRenderedQueue");
}
if (Interlocked.Exchange(ref this.isProcessTileRenderedQueueQueued, 1) == 0)
{
this.syncContext.Post(this.processTileRenderedQueueCallback);
}
}
public bool ProcessTileRenderedQueue()
{
base.VerifyAccess();
using (this.processTileRenderedQueueRegion.UseEnterScope())
{
if (this.IsDisposed)
{
bool flag = false;
do
{
KeyValuePair <PointInt32, RenderedTileInfo> pair;
while (this.tilesRenderedQueue.TryDequeue(out pair))
{
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref pair.Value.Buffer);
flag = true;
}
}while (Interlocked.Exchange(ref this.isProcessTileRenderedQueueQueued, 0) == 1);
return(flag);
}
if (Interlocked.Exchange(ref this.isProcessTileRenderedQueueQueued, 0) == 0)
{
return(false);
}
List <PointInt32> collection = new List <PointInt32>();
List <PointInt32> cancelledTileOffsets = null;
bool flag3 = false;
int count = this.tilesRenderedQueue.Count;
for (int i = 0; i < count; i++)
{
KeyValuePair <PointInt32, RenderedTileInfo> pair2;
if (this.tilesRenderedQueue.TryDequeue(out pair2))
{
PointInt32 key = pair2.Key;
RenderedTileInfo info2 = pair2.Value;
IBitmap <ColorPbgra32> buffer = info2.Buffer;
if (this.tilesRenderingCancelledSet.Remove(key) || !info2.Completed)
{
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref buffer);
if (this.tilesRenderQueue.Contains(key))
{
flag3 = true;
}
else if (info2.Error is OperationCanceledException)
{
if (cancelledTileOffsets == null)
{
cancelledTileOffsets = new List <PointInt32>();
}
cancelledTileOffsets.Add(key);
}
}
else
{
if ((buffer.IsNullReference <IBitmap <ColorPbgra32> >() || buffer.IsDisposed) || !pair2.Value.Completed)
{
throw new PaintDotNet.InternalErrorException();
}
IBitmap <ColorPbgra32> disposeMe = this.tileBuffers[key.Y][key.X];
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref disposeMe);
this.tileBuffers[key.Y][key.X] = buffer;
this.tileIsValid[key.Y][key.X] = true;
collection.Add(key);
}
if (!this.tilesRenderingSet.Remove(key))
{
throw new PaintDotNet.InternalErrorException();
}
}
}
if (collection.Any <PointInt32>())
{
this.owner.NotifyTileCacheFinishedRendering <List <PointInt32> >(this, collection);
}
if (flag3)
{
this.ProcessTileRenderQueue();
}
if (!this.tilesRenderingSet.Any <PointInt32>())
{
this.owner.NotifyTileCacheIsIdle(this);
}
if (cancelledTileOffsets != null)
{
this.syncContext.Post(delegate(object _) {
this.InvalidateCancelledTiles(cancelledTileOffsets);
});
}
return(collection.Any <PointInt32>());
}
}