Issues with reverse stereo blitting

lerouxcjh · Thu Jun 03, 2010 6:56 am

Using the GDC09 pdf from http://www.mtbs3d.com/phpBB/viewtopic.php?f=60&t=4026, I attempted to reverse stereo blit the backbuffer to a stereo image. Here's what I did:

Code:

// Set destination rectangle as double backbuffer's one
   backBufferRect.left=0;
   backBufferRect.top=0;
   backBufferRect.right=gImageWidth;
   backBufferRect.bottom=gImageHeight;
   
   stereoImageRect.left=0;
   stereoImageRect.top=0;
   stereoImageRect.right=2*gImageWidth;
   stereoImageRect.bottom= gImageHeight;

   //turn on reverse blit
   NvAPI_Stereo_ReverseStereoBlitControl(gStereoHandle, true);

   m_d3dDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &gBackBuf);

   //reverse blit
   if(FAILED(m_d3dDevice->StretchRect(gBackBuf,&backBufferRect,gStereoImage,&stereoImageRect, D3DTEXF_LINEAR)))
   {
      MessageBox( NULL, "StretchRect Failed", "Error!", 0);
   }
   //turn off reverse blit
   NvAPI_Stereo_ReverseStereoBlitControl(gStereoHandle, false);

where gStereoImage is a OffscreenPlainSurface in the DEFAULT video memory pool.
Though I am a Direct3D noob, looking at the 3D vision pdf I sort of expected stretchRect to fail because of its limitations, and so it did... Am I missing something?

Issues with reverse stereo blitting

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