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IDProjectCategoryView StatusDate SubmittedLast Update
0009365VTK(No Category)public2009-08-05 09:202016-08-12 09:55
ReporterSergey Anikin 
Assigned ToKitware Robot 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Project
Type
Summary0009365: Unnecessary glFlush() call in vtkOpenGLFreeTypeTextMapper::RenderOverlay()
DescriptionIn VTK 5.4.2 and older versions there is a strange glFlush() call in vtkOpenGLFreeTypeTextMapper::RenderOverlay().
Even if it leads to no visible consequences on most "native" Linux X servers (neither locally nor through a remote connection), on some Win32 X servers like X-Win32 or Exceed it results in frame buffer swapping, and everything drawn after the first text label goes immediately to the active frame buffer and appears on the screen.

I have tried to comment glFlush() call (most likely, it remains there since some debugging). This resolves my problem, thus I attach the corrected source file for validation and testing.
Steps To Reproduce
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Attached Filesgz vtkOpenGLFreeTypeTextMapper.tar.gz (3,988) 2009-08-05 09:20
https://www.vtk.org/Bug/file/7396/vtkOpenGLFreeTypeTextMapper.tar.gz
Issue History
Date ModifiedUsernameFieldChange
2009-08-05 09:20Sergey AnikinNew Issue
2009-08-05 09:20Sergey AnikinFile Added: vtkOpenGLFreeTypeTextMapper.tar.gz
2009-10-29 14:12Sean McBrideNote Added: 0018280
2009-10-29 14:12Sean McBrideStatusbacklog => tabled
2009-10-29 14:12Sean McBrideAssigned To => François Bertel
2010-09-07 13:44François BertelAssigned ToFrançois Bertel =>
2011-06-16 13:11Zack GalbreathCategory => (No Category)
2016-08-12 09:55Kitware RobotNote Added: 0037093
2016-08-12 09:55Kitware RobotStatusexpired => closed
2016-08-12 09:55Kitware RobotResolutionopen => moved
2016-08-12 09:55Kitware RobotAssigned To => Kitware Robot

Notes
(0018280)
Sean McBride   
2009-10-29 14:12   
I tried this change on my working copy and 1) no new test failures were introduced 2) it does not cause any problems in my app, including where I use vtk to draw text.

flushes are expensive, so if this really isn't needed, that'd be nice.

Assigning to François because I know he knows about ogl&vtk. :)
(0037093)
Kitware Robot   
2016-08-12 09:55   
Resolving issue as `moved`.

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