[vtkusers] Bug in vtkTextActor for accentuated characters?

[Roger Bramon Feixas]

Thank you Pof to test it! Now, I hope it will be applied to the dev branch.

Yes, the problem with accentuated characters is already solved. Therefore,
next VTK release will not have that problem. However, if you are interested
on it now, you can apply this patch:
http://vtk.org/gitweb?p=VTK.git;a=patch;h=331a44656276882766248c1f8e338434b40226ef
.

Let me know if it works.

Roger

On Wed, Sep 8, 2010 at 1:18 PM, pof <jd379252 at gmail.com> wrote:

>  Hi Roger,
> I applied your patch to vtk5.6.0, and this fully solve the shadow problem,
> great!
> Still I 've got this problem with accuentuated characters (which of course
> was your patch was aiming to solve). If I understand well your reponse, this
> is already solved in the dev branch, am I correct?
> Pof
>
> Le 06/09/2010 08:52, Roger Bramon Feixas a écrit :
>
> Hi Pof,
>
>  Since VTK 5.2.0, vtkTextActor is rendered using glyphs instead of OpenGL.
> I also had that problem but it was solved in that commit
> http://vtk.org/gitweb?p=VTK.git;a=commit;h=331a44656276882766248c1f8e338434b40226efwhen UTF8 text rendering was enabled. It's after VTK 5.6 was released.
>
>  On the other hand, I suppose you still have problems rendering text with
> shadow, as you reported in that issue: http://vtk.org/Bug/view.php?id=9618.
> I tried to solve it and I attached a patch in that issue waiting for
> feedback. It would be wonder if you could test it and let me know if it
> works well.
>
>  Thanks,
>
>  Roger
>
>
> On Fri, Sep 3, 2010 at 2:12 PM, Pof <jd379252 at gmail.com> wrote:
>
>> Hi all,
>>
>> I am having trouble displaying accentuated characters in vtkTextActor with
>> vtk5.6.0 under MS-VC++2005.
>> Here below is an exemple that reproduces the problem, by printing the same
>> string than contains accents "é,è,à".
>> When I run this small prog, as a result I obtain that accentuated
>> characters (é,è...) are :
>> - correctly displayed when used in a vtkScalarBarActor title,
>> - not displayed when incorporated in vtkTextActor.
>>
>> Any idea where does this come from and how to solve it?
>>
>> As an additional comment, this used to work correctly under vtk5.0.x, it
>> is only broken from vtk5.2.x up to vtk5.6.0.
>>
>> Thanks
>> JD
>>
>>
>> //////////////////////////////////////////////////////
>> ////////////////// vtkTextActor bug //////////////////
>> //////////////////////////////////////////////////////
>> #include "vtkActor.h"
>> #include "vtkRenderer.h"
>> #include "vtkRenderWindow.h"
>> #include "vtkRenderWindowInteractor.h"
>> #include "vtkCamera.h"
>> #include "vtkTextProperty.h"
>> #include "vtkTextActor.h"
>> #include "vtkActor2D.h"
>> #include "vtkLookupTable.h"
>> #include "vtkScalarBarActor.h"
>>
>> int main()
>> {
>>     // Tested string
>>     char text[] = "Test: é, è, à";
>>
>>     // Create an example text actor
>>     vtkTextActor *textActor = vtkTextActor::New();
>>     textActor->SetInput(text);
>>
>> textActor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
>>     textActor->SetPosition(0.50,0.50);
>>     textActor->GetTextProperty()->SetFontSize(30);
>>     textActor->GetTextProperty()->SetJustificationToCentered();
>>     textActor->GetTextProperty()->SetColor(1, 0, 0);
>>
>>     // Create a Lut
>>     vtkLookupTable *Lut = vtkLookupTable::New();
>>     Lut->SetHueRange (160.0/240.0, 0.0);
>>     Lut->SetSaturationRange (1.0, 1.0);
>>     Lut->SetValueRange (1.0, 1.0);
>>     Lut->SetTableRange (0,100);
>>     Lut->Build();
>>
>>     // Create a ScalarBarActor
>>     vtkScalarBarActor *scalarBar = vtkScalarBarActor::New();
>>     scalarBar->SetTitle(text);
>>     scalarBar->SetLookupTable(Lut);
>>     scalarBar->SetHeight(0.5);
>>     scalarBar->SetWidth(0.1);
>>     scalarBar->SetPosition(0.10,0.01);
>>     scalarBar->SetPosition2(0.80,0.1);
>>     scalarBar->SetOrientationToHorizontal();
>>
>>     // Create the graphics structure
>>     vtkRenderer *ren = vtkRenderer::New();
>>     vtkRenderWindow *renWin = vtkRenderWindow::New();
>>     renWin->AddRenderer(ren);
>>     renWin->SetSize(600, 600);
>>     vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
>>     iren->SetRenderWindow(renWin);
>>
>>     // Add the actors to the renderer, set the background and size
>>     ren->AddActor(textActor);
>>     ren->AddActor(scalarBar);
>>     ren->SetBackground(0.1, 0.2, 0.4);
>>     ren->ResetCamera();
>>     ren->GetActiveCamera()->Zoom(1.0);
>>     renWin->Render();
>>
>>     // Starts the event loop
>>     iren->Start();
>>
>>     // Do some cleaning
>>     textActor->Delete();
>>     Lut->Delete();
>>     scalarBar->Delete();
>>     ren->Delete();
>>     renWin->Delete();
>>     iren->Delete();
>>
>>     return 0;
>> }
>>
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