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;
}
}
}
}
}
}
}
public DocumentCanvasTileCache(DocumentCanvasLayer owner, IBitmapSource <ColorBgra32> source, int sourceTileEdgeLog2, int mipLevel, bool highQuality)
{
Validate.Begin().IsNotNull <DocumentCanvasLayer>(owner, "owner").IsNotNull <IBitmapSource <ColorBgra32> >(source, "source").Check();
if (sourceTileEdgeLog2 < 0)
{
ExceptionUtil.ThrowArgumentOutOfRangeException("sourceTileEdgeLog2");
}
if (mipLevel < 0)
{
ExceptionUtil.ThrowArgumentOutOfRangeException("mipLevel");
}
this.syncContext = SynchronizationContext.Current;
this.owner = owner;
this.source = source;
this.sourceSize = this.source.Size;
this.sourceBounds = this.source.Bounds();
this.isHighQuality = highQuality;
this.tileMathHelper = new PaintDotNet.Rendering.TileMathHelper(this.sourceSize.Width, this.sourceSize.Height, sourceTileEdgeLog2);
this.mipLevel = mipLevel;
this.tileIsValid = ArrayUtil.Create2D <bool>(this.tileMathHelper.TileRows, this.tileMathHelper.TileColumns);
this.invalidTileOffsets = new DequeSet <PointInt32>();
this.tileBuffers = ArrayUtil.Create2D <IBitmap <ColorPbgra32> >(this.tileMathHelper.TileRows, this.tileMathHelper.TileColumns);
for (int i = 0; i < this.tileMathHelper.TileRows; i++)
{
for (int j = 0; j < this.tileMathHelper.TileColumns; j++)
{
this.invalidTileOffsets.TryEnqueue(new PointInt32(j, i));
}
}
this.tilesRenderQueue = new DequeSet <PointInt32>();
this.tilesRenderingSet = new HashSet <PointInt32>();
this.tilesRenderingCancelledSet = new ConcurrentSet <PointInt32>();
this.tilesRenderedQueue = new ConcurrentDequeDictionary <PointInt32, RenderedTileInfo>();
this.processTileRenderQueueCallback = new SendOrPostCallback(this.ProcessTileRenderQueueCallback);
this.processTileRenderedQueueCallback = new SendOrPostCallback(this.ProcessTileRenderedQueueCallback);
this.workItemDispatcher = WorkItemDispatcher.Default;
this.workItemQueue = new EditableDataWorkItemQueue <PointInt32>(this.workItemDispatcher, new Action <PointInt32>(this.RenderTileWorkItem));
}
