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).<br>
<br>
<a href="http://www.vtk.org/doc/nightly/html/classvtkWindowToImageFilter.html">http://www.vtk.org/doc/nightly/html/classvtkWindowToImageFilter.html</a><br>
<br>
<br><br><div><span class="gmail_quote">On 6/8/05, <b class="gmail_sendername">Renaud Isabelle</b> <<a href="mailto:renauisa@yahoo.fr">renauisa@yahoo.fr</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>I'm got really <strong>crazy</strong>. I don't manage to use <strong>double buffering</strong> in order to <strong>avoid flickering</strong> on screen.</div>
<div> </div>
<div>I'm using <strong>ImageSliceViewer</strong> <strong>to render a 2D slice of my 3D image on screen</strong>. It works well without double buffering except for flickering on screen.</div>
<div> </div>
<div>I have already use double buffering in MFC and I have a class CMemDC that works fine to use memory buffering. </div>
<div> </div>
<div><strong>-> All I need is a method to get the pixel data of my 2D slice displayed on screen</strong>.Then I can use it to create a DIB Bitmap from what is rendered off screen. </div>
<div> </div>
<div>I found the example of rendering in MFC and I tried the series of instructions:</div>
<div> </div>
<div><strong>this->window->SetupMemoryRendering(x,y,hdc);</strong></div>
<div><strong>this->window->Render();</strong></div>
<div><strong>StretchBlt(dc,0,0,x,y,memDC,0,0,x,y,SRCCOPY);</strong></div>
<div><strong>this->window->ResumeScreenRendering();</strong></div>
<div> </div>
<div>but all is displayed is a <strong>white </strong>page. Especially because during process, <strong>unsigned char* MemoryData</strong> should be NULL.</div>
<div> </div>
<div>Please help me. </div><span class="ad">
<div> </div>
<div> </div>
<div> </div><p>
</p><hr size="1">
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