[vtk-developers] Text Actor with no input causes No scalar values found for texture input!

[Deepak Surti]

Hi,

I built a VTK 6.2 egg with OpenGL2 rendering backend enabled. It causes
this error if no input set for Text Actor. Same also happens if no title
exists for Scalar Bar actor.

==================================

The error log is: (for VTK 6.2 with OpenGL2 enabled)

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-6.1.0-1/work/VTK-6.1.0/Rendering/OpenGL2/vtkOpenGLTexture.cxx,
line 171
vtkOpenGLTexture (0x10b019200): No scalar values found for texture input!

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-6.1.0-1/work/VTK-6.1.0/Rendering/OpenGL2/vtkTextureObject.cxx,
line 454
vtkTextureObject (0x102932920): failed at glBindTexture(0) 1 OpenGL errors
detected
  0 : (1280) Invalid enum


ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-6.1.0-1/work/VTK-6.1.0/Rendering/OpenGL2/vtkOpenGLTexture.cxx,
line 171
vtkOpenGLTexture (0x10b019200): No scalar values found for texture input!

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-6.1.0-1/work/VTK-6.1.0/Rendering/OpenGL2/vtkTextureObject.cxx,
line 454
vtkTextureObject (0x102932920): failed at glBindTexture(0) 1 OpenGL errors
detected
  0 : (1280) Invalid enum


ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-6.1.0-1/work/VTK-6.1.0/Rendering/OpenGL2/vtkOpenGLTexture.cxx,
line 171
vtkOpenGLTexture (0x10b019200): No scalar values found for texture input!

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-6.1.0-1/work/VTK-6.1.0/Rendering/OpenGL2/vtkTextureObject.cxx,
line 454
vtkTextureObject (0x102932920): failed at glBindTexture(0) 1 OpenGL errors
detected
  0 : (1280) Invalid enum

======================================

I also tested for VTK 5.10 and this is the error log:

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-5.10.1-2/work/VTK5.10.1/Rendering/vtkFreeTypeUtilities.cxx,
line 1782
vtkFreeTypeUtilities (0x10102a600): no text in input

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-5.10.1-2/work/VTK5.10.1/Filtering/vtkImageData.cxx,
line 1349
vtkImageData (0x1005c1790): No Scalar Field has been specified - assuming 1
component!

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-5.10.1-2/work/VTK5.10.1/Rendering/vtkOpenGLTexture.cxx,
line 196
vtkOpenGLTexture (0x1005c1e50): No scalar values found for texture input!

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-5.10.1-2/work/VTK5.10.1/Rendering/vtkFreeTypeUtilities.cxx,
line 1782
vtkFreeTypeUtilities (0x10102a600): no text in input

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-5.10.1-2/work/VTK5.10.1/Filtering/vtkImageData.cxx,
line 1349
vtkImageData (0x1005c1790): No Scalar Field has been specified - assuming 1
component!

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-5.10.1-2/work/VTK5.10.1/Rendering/vtkOpenGLTexture.cxx,
line 196
vtkOpenGLTexture (0x1005c1e50): No scalar values found for texture input!

ERROR: In
/Users/deepaksurti/pisi-64bit/tmp/VTK-5.10.1-2/work/VTK5.10.1/Rendering/vtkOpenGLTexture.cxx,
line 196
vtkOpenGLTexture (0x1005c1e50): No scalar values found for texture input!

============================

WORKS FINE IN VTK 6.1

I have also added a sample test file to reproduce this error.

Any suggestions to fix this?

Thanks,
Deepak
-- 
http://deepaksurti.com
To see a miracle, be the miracle.
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