Wednesday, July 18, 2007 6:33 AM
Do silverlight support double buffering and vsync?
I am a beginner to silverlight, I tried to make a little ticker animation which translate textblock from left to right with silverlight. The performance is not very good at all. I think the problem is related to double buffering and vsync.
Thursday, July 19, 2007 1:13 AM
Yes, we do double buffer. Whether you get vtrace tearing depends on the OS you are running on.
What browser and platform are you running on? Something as simple as translating a textblock should run at very high framerates.
Some gotcha's to watch out for:
1. set windowless=false on the control (fastest mode and less tearing)
2. make sure the background is not transparent
- Ashraf Michail
Thursday, July 19, 2007 2:30 AM
Even the control is set windowless: 'false', the textblock does not move smoothly. I wonder how can I create a smooth ticker
The textblock I have made is
<TextBlock x:Name="text" Canvas.Top="0" Canvas.Left="0" Width="450" Height="100" FontSize="72" Text="TextBlock" TextWrapping="Wrap">
<TranslateTransform x:Name="AnimatedRotateTransform" X="0" Y="0"/>
<!-- Animates the rectangle's opacity. -->
From="1024" To="-450" Duration="0:0:5"
AutoReverse="False" RepeatBehavior="Forever" />
Thursday, July 19, 2007 12:31 PM
I take it you've already tried increasing the framerate?
Thursday, July 19, 2007 9:26 PM
I have tried 24 and even 36, the textblock still does not move smoothly
Friday, July 20, 2007 12:09 PM
There's no reason I'm aware of that you can't go higher than that. I tried it at 200 and it looked pretty nice.
Monday, July 23, 2007 3:47 AM
I have tried to enable frame rate counter and it shows that the demo is now running at around 100 fps. Tearing is still there.
Monday, July 23, 2007 10:38 AM
Tearing will be present on XP but shouldn't be present on Vista or MacOS if you set windowless=false.
Monday, July 23, 2007 9:54 PM
Is there any workaround in winXP?
If there is no, is there any plan that the feature will be supported in future release of silverlight?
Monday, September 28, 2009 8:56 PM
This thread seems to have stalled with no resolution.
Vsync seems to be an ongoing issue for a number of people using Silverlight. The issue is not limited to the poster above - Netflix for instance has page tearing issues now that it uses Silverlight.
How can developers and users prevent page tearing?
Wednesday, May 05, 2010 10:44 PMIs there a flag somewhere that indicates when a refresh is in progress? I know that seems unlikely since the plugin doesn't have that much access to the GPU, but it might help us prevent shearing when implementing procedural animation.