[vtkusers] drawing png over vtk

[Tim Thornton]

Hi,
I'm not sure if that will work, but what we have done to do something
similar is add the PNG file into vtk, so vtk renders both pictures. Vtk
supports the standard vtk transparency, and if you want to you can also
change the transparency of the image so that the underlying vtk graphics can
be seen.
The only drawback we have found is that the PNG routines are quite slow, at
least relative to JPEG, in VTK, so if you want an aniomation of a sequence
of PNG images this doesn't work too well.
Tim

-----Original Message-----
From: vtkusers-bounces+tt=smartcomsoftware.com at vtk.org
[mailto:vtkusers-bounces+tt=smartcomsoftware.com at vtk.org] On Behalf Of
Jean-Baptiste Estival
Sent: 04 September 2006 16:23
To: vtkusers at vtk.org
Subject: [vtkusers] drawing png over vtk

Hello everybody,

I have an app I developped under win32. This is a dialog drawing 
graphics pictures (CWnd A) (using windows GDI) on the top, and vtk below 
(CWnd B).
Now, A will have common region with B. Parts of this region will be 
transparent to show B.
Is it possible or not ?

Thanks

Best regards.
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