Method ReleaseGraphicsResources

Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx:718–786

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//------------------------------------------------------------------------------
void vtkOpenGLRenderWindow::ReleaseGraphicsResources(vtkWindow* renWin)
{
  this->PushContext();

  delete this->ResolveQuad;
  this->ResolveQuad = nullptr;

  delete this->DepthBlitQuad;
  this->DepthBlitQuad = nullptr;

  delete this->FlipQuad;
  this->FlipQuad = nullptr;

  delete this->DepthReadQuad;
  this->DepthReadQuad = nullptr;

  this->RenderFramebuffer->ReleaseGraphicsResources(renWin);
  this->DisplayFramebuffer->ReleaseGraphicsResources(renWin);
  this->ResolveFramebuffer->ReleaseGraphicsResources(renWin);
  this->DepthFramebuffer->ReleaseGraphicsResources(renWin);

  // release the registered resources
  if (this->NoiseTextureObject)
  {
    this->NoiseTextureObject->ReleaseGraphicsResources(this);
  }

  std::set<vtkGenericOpenGLResourceFreeCallback*>::iterator it = this->Resources.begin();
  while (it != this->Resources.end())
  {
    (*it)->Release();
    it = this->Resources.begin();
  }

  vtkCollectionSimpleIterator rsit;
  this->Renderers->InitTraversal(rsit);
  vtkRenderer* aren;
  while ((aren = this->Renderers->GetNextRenderer(rsit)))
  {
    if (aren->GetRenderWindow() == this)
    {
      aren->ReleaseGraphicsResources(renWin);
    }
  }

  if (this->DrawPixelsTextureObject != nullptr)
  {
    this->DrawPixelsTextureObject->ReleaseGraphicsResources(renWin);
  }

  this->GetShaderCache()->ReleaseGraphicsResources(renWin);
  // this->VBOCache->ReleaseGraphicsResources(renWin);

  this->GetState()->VerifyNoActiveTextures();

  this->RenderTimer->ReleaseGraphicsResources();

  if (this->TQuad2DVBO)