March 20th, 2011, 11:51 AM
Direct2D & GDI+ at the same time?
I have an interactive 2D-Viewport-Control (zooming, panning etc) where I'm displaying some images with the Graphics.DrawImage method. But this is extremely slow so I tried to accelerate the image drawing with Direct2D. In C++/CLI I wrote a wrapper around IDCRenderTarget.DrawBitmap and it actually works (when working alone).
However there is a tiny-little issue... I'm not able to draw with GDI+ and Direct2D at the same time. Either one or the other is visible so there is a lot of flickering right now. GDI+ draws some stuff first, then should Direct2D draw some images to the same viewport and then I want to draw some GDI+ stuff agian.
Do you know how to solve it?
win7 x86, VS 2008 & 2010, C++/CLI, C#, .NET 3.5 & 4.0, VB.NET, VBA... WPF is comming
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