[vtkusers] Please help me: How get pixel data after Render()

[Renaud Isabelle]

Hi,
 
I'm sorry but this is not what I'm looking for. I have no image on the screen. 
 
By using vtkImageActor I can display one slice of my 3D image. This will be rendered off screen.
 
All I want is retrieve the pixel data of this slice from memory to display it on .
 
Do you have another idea?
 
Thanks,
Isa

Randall Hand <randall.hand at gmail.com> a écrit :
to get the screen image, you can use vtkWindowToImageFilter.. that'll turn the screen display into a 2d vtkImageData object that you can pass to other VTK filters (or in my case, vtkPNGWriter).

http://www.vtk.org/doc/nightly/html/classvtkWindowToImageFilter.html



On 6/8/05, Renaud Isabelle <renauisa at yahoo.fr> wrote:I'm got really crazy. I don't manage to use double buffering in order to avoid flickering on screen.
 
I'm using ImageSliceViewer to render a 2D slice of my 3D image on screen. It works well without double buffering except for flickering on screen.
 
I have already use double buffering in MFC and I have a class CMemDC that works fine to use memory buffering. 
 
-> All I need is a method to get the pixel data of my 2D slice displayed on screen.Then I can use it to create a DIB Bitmap from what is rendered off screen.  
 
I found the example of rendering in MFC and I tried the series of instructions:
 
this->window->SetupMemoryRendering(x,y,hdc);
this->window->Render();
StretchBlt(dc,0,0,x,y,memDC,0,0,x,y,SRCCOPY);
this->window->ResumeScreenRendering();
 
but all is displayed is a white page. Especially because during process, unsigned char* MemoryData should be NULL.
 
Please help me. 
 
 
 



---------------------------------
Découvrez le nouveau Yahoo! Mail : 1 Go d'espace de stockage pour vos mails, photos et vidéos !
Créez votre Yahoo! Mail 


_______________________________________________
This is the private VTK discussion list.
Please keep messages on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
Follow this link to subscribe/unsubscribe:
http://www.vtk.org/mailman/listinfo/vtkusers 






-- 
Randall Hand
http://www.yeraze.com 
		
---------------------------------
 Découvrez le nouveau Yahoo! Mail : 1 Go d'espace de stockage pour vos mails, photos et vidéos !
Créez votre Yahoo! Mail  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20050608/605445e4/attachment.htm>