MantisBT - VTK
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ID	Project	Category	View Status	Date Submitted	Last Update
0012703	VTK	(No Category)	public	2011-11-03 10:26	2013-07-22 20:48

Reporter	CJ Bourn
Assigned To	Dave DeMarle
Priority	normal	Severity	minor	Reproducibility	have not tried
Status	closed	Resolution	fixed
Platform		OS		OS Version
Product Version	5.8.0
Target Version		Fixed in Version
Project	TBD
Type	crash

Summary	0012703: vtkOpenGLGPUVolumeRayCastMapper: Exception in LoadExtensions causes InRender flag to stay set and never render again
Description	In vtkOpenGLGPUVolumeRayCastMapper, if the GL context could not actually be set up, then all the calls to glGetString() will return NULL. These results are then blindly passed to strstr() which results in an exception. This method gets called during Render() which causes the InRender flag of vtkRenderWindow to never be cleared and thus rendering will never occur again. The fix is simple, eg Line 2160: const char gl_version=reinterpret_cast<const char >(glGetString(GL_VERSION)); if(gl_version != 0 && strstr(gl_version,"Mesa")!=0) ^^^^^^^^^^^^^^^^^^
Steps To Reproduce
Additional Information
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Attached Files	vtkOpenGLGPUVolumeRayCastMapper.cxx (244,293) 2011-11-03 10:26 https://www.vtk.org/Bug/file/9063/vtkOpenGLGPUVolumeRayCastMapper.cxx

Issue History
Date Modified	Username	Field	Change
2011-11-03 10:26	CJ Bourn	New Issue
2011-11-03 10:26	CJ Bourn	File Added: vtkOpenGLGPUVolumeRayCastMapper.cxx
2013-07-22 20:48	Dave DeMarle	Assigned To	=> Dave DeMarle
2013-07-22 20:48	Dave DeMarle	Status	backlog => todo
2013-07-22 20:48	Dave DeMarle	Status	todo => active development
2013-07-22 20:48	Dave DeMarle	Note Added: 0031311
2013-07-22 20:48	Dave DeMarle	Status	active development => closed
2013-07-22 20:48	Dave DeMarle	Resolution	open => fixed

Notes