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IDProjectCategoryView StatusDate SubmittedLast Update
0010017VTK(No Category)public2009-12-09 06:432016-08-12 09:55
ReporterXavi 
Assigned ToKitware Robot 
PrioritynormalSeveritytrivialReproducibilityalways
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0010017: Check list id before delete
DescriptionWhen vtkOpenGLDisplayListPainter::ReleaseGraphicsResources(vtkWindow* win) is called with a vtkWindow not used by the vtkOpenGLDisplayListPainter, the memory is not released.

We can call the function glIsList() to check that the current window is the active one when the list was created.
Additional InformationWe can fix it with this code:

void vtkOpenGLDisplayListPainter::ReleaseList()
{
  if (this->DisplayListId)
    {
      if ( glIsList( this->DisplayListId ) == GL_TRUE )
      {
          glDeleteLists(this->DisplayListId, 1);
          this->DisplayListId = 0;
      }
    }
}
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  Notes
(0018819)
François Bertel (developer)
2009-12-11 12:02

 Calling vtkOpenGLDisplayListPainter::ReleaseGraphicsResources(vtkWindow* win)
with a window not used by the vtkOpenGLDisplayListPainter is a bug in the caller code itself. There is no fix to add to vtkOpenGLDisplayListPainter::ReleaseGraphicsResources().

In addition, there is no guarantee that the "win" argument will then be a valid OpenGL context and any gl* call in this case will not be valid (it could lead to crash).

Maybe you can explain in which case it happens that "win" is not the one using the display list. It might still be a bug in VTK but somewhere else.
(0018844)
Xavi (reporter)
2009-12-14 09:34

 Hi Francois,

In my application I want to render several surface meshes in two windows. These are the objects involved:
- Two vtkWindows: to render the mesh in 3D. I can have other windows to render the mesh in 2D but now these are not important.
- One data object: vtkPolyData
- Two mappers for 3D: to render the mesh in 3D (vtkPolyDataMapper)

When the first mesh is loaded, the two mappers are created and attached to the mesh object. When the mesh is rendered in window 1, the mapper 1 is used. When the mesh object is deleted, the mappers are deleted.

Then, this process is repeated for the second mesh object.

When a mapper is deleted, there's a loop that iterates over all the vtkWindow and calls the function ReleaseGraphicsResources( ). Otherwise the OpenGL memory is not realeased until the vtkWindow is destroyed and the function wglDeleteContext( ) is called.

I hope you can get an overview of the context.

Best,
Xavi
(0037125)
Kitware Robot (administrator)
2016-08-12 09:55

 Resolving issue as `moved`.

This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

 Issue History
Date Modified Username Field Change
2009-12-09 06:43 Xavi New Issue
2009-12-11 11:54 François Bertel Status backlog => tabled
2009-12-11 11:54 François Bertel Assigned To => François Bertel
2009-12-11 12:02 François Bertel Note Added: 0018819
2009-12-14 09:34 Xavi Note Added: 0018844
2010-09-07 13:44 François Bertel Assigned To François Bertel =>
2011-06-16 13:11 Zack Galbreath Category => (No Category)
2016-08-12 09:55 Kitware Robot Note Added: 0037125
2016-08-12 09:55 Kitware Robot Status expired => closed
2016-08-12 09:55 Kitware Robot Resolution open => moved
2016-08-12 09:55 Kitware Robot Assigned To => Kitware Robot

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