public bool ProcessTileRenderQueue()
{
base.VerifyAccess();
using (this.processTileRenderQueueRegion.UseEnterScope())
{
if (this.IsDisposed)
{
this.tilesRenderQueue.Clear();
return(false);
}
int count = this.tilesRenderQueue.Count;
IList <PointInt32> workItemQueueAccumulator = null;
for (int i = 0; i < count; i++)
{
PointInt32 tileOffset = this.tilesRenderQueue.Dequeue();
if (this.IsTileRenderingCancelled(tileOffset))
{
if (!this.tilesRenderingSet.Contains(tileOffset))
{
ExceptionUtil.ThrowInternalErrorException();
}
this.tilesRenderQueue.TryEnqueue(tileOffset);
}
else
{
if (!this.tilesRenderingSet.Add(tileOffset))
{
ExceptionUtil.ThrowInternalErrorException();
}
if (this.tilesRenderingSet.Count == 1)
{
this.owner.NotifyTileCacheIsRendering(this);
}
if (workItemQueueAccumulator == null)
{
workItemQueueAccumulator = new List <PointInt32>();
}
workItemQueueAccumulator.Add(tileOffset);
}
}
if (workItemQueueAccumulator != null)
{
PointInt32 sourcePt = PointDouble.Round(this.owner.MouseLocation, MidpointRounding.AwayFromZero);
PointInt32 comparand = this.tileMathHelper.ConvertSourcePointToTileOffset(sourcePt);
CompareTileOffsetsByDistance comparer = new CompareTileOffsetsByDistance(comparand);
this.workItemQueue.Edit(delegate {
this.workItemQueue.EnqueueRange <IList <PointInt32> >(workItemQueueAccumulator);
this.workItemQueue.Sort <CompareTileOffsetsByDistance>(comparer);
});
return(true);
}
return(false);
}
}
public void BeforeRender(RectFloat clipRect)
{
if ((!this.afterRenderCalled || this.beforeRenderCalled) || this.renderCalled)
{
throw new PaintDotNet.InternalErrorException();
}
this.afterRenderCalled = false;
this.beforeRenderCalled = true;
bool flag = this.canvasView.RenderTarget.IsSupported(RenderTargetType.Software, null, null, null);
if (flag || this.IsActive)
{
this.renderStopwatch.Restart();
RectInt32 num2 = RectInt32.Intersect(clipRect.Int32Bound, this.owner.Document.Bounds());
bool flag2 = false;
if (num2.HasPositiveArea)
{
PointInt32 num7;
PointInt32[] array = this.nonCurrentTileOffsets.ToArrayEx <PointInt32>();
this.nonCurrentTileOffsets.Clear();
PointInt32 sourcePt = PointDouble.Round(this.owner.Owner.MouseLocation, MidpointRounding.AwayFromZero);
PointInt32 comparand = this.tileMathHelper.ConvertSourcePointToTileOffset(sourcePt);
CompareTileOffsetsByDistance comparer = new CompareTileOffsetsByDistance(comparand);
ListUtil.Sort <PointInt32, ArrayStruct <PointInt32>, CompareTileOffsetsByDistance>(array.AsStruct <PointInt32>(), comparer);
DequeSet <PointInt32> set = new DequeSet <PointInt32>(array);
int count = set.Count;
while (set.TryDequeue(out num7))
{
if (!this.isDeviceBitmapCurrent[num7.Y][num7.X])
{
if (flag2)
{
this.nonCurrentTileOffsets.TryEnqueue(num7);
}
else
{
if (!this.TryUpdateDeviceBitmap(num7))
{
this.nonCurrentTileOffsets.TryEnqueue(num7);
flag2 = true;
}
if ((!flag2 && !flag) && (this.renderStopwatch.ElapsedMilliseconds > 0x7fffffffffffffffL))
{
flag2 = true;
}
}
}
}
}
}
}