private bool TryUpdateDeviceBitmap(int tileColumn, int tileRow)
{
IRenderTarget renderTarget = this.canvasView.RenderTarget;
if (renderTarget == null)
{
return(false);
}
bool flag = renderTarget.IsSupported(RenderTargetType.Software, null, null, null);
if (!flag && (!this.IsVisible || !this.IsActive))
{
throw new PaintDotNet.InternalErrorException();
}
if (!this.isDeviceBitmapCurrent[tileRow][tileColumn])
{
using (IBitmap <ColorPbgra32> bitmap = this.tileCache.TryGetTileBufferRef(tileColumn, tileRow))
{
if (bitmap != null)
{
if (bitmap.IsDisposed)
{
throw new ObjectDisposedException("tileBufferRef");
}
if (flag)
{
DisposableUtil.Free <IDeviceBitmap>(ref this.deviceBitmaps[tileRow][tileColumn]);
DisposableUtil.Free <IBitmap <ColorPbgra32> >(ref this.tileBuffers[tileRow][tileColumn]);
IBitmapLock bitmapLock = bitmap.Lock <ColorPbgra32>(BitmapLockOptions.Read);
IDeviceBitmap bitmap2 = renderTarget.CreateSharedBitmap(bitmapLock, null);
this.deviceBitmaps[tileRow][tileColumn] = bitmap2;
this.tileBuffers[tileRow][tileColumn] = bitmap.CreateRef <ColorPbgra32>();
}
else
{
ObjectPoolTicket <IDeviceBitmap> ticket = this.deviceBitmapTickets[tileRow][tileColumn];
if (ticket == null)
{
try
{
ticket = this.owner.DeviceBitmapPool.Get(bitmap.Size);
}
catch (RecreateTargetException)
{
return(false);
}
this.deviceBitmapTickets[tileRow][tileColumn] = ticket;
this.deviceBitmaps[tileRow][tileColumn] = ticket.Value;
}
ticket.Value.CopyFromBitmap(null, bitmap, null);
}
this.isDeviceBitmapCurrent[tileRow][tileColumn] = true;
}
}
}
return(true);
}