[Ves] kiwiviewer background image not working

[Pat Marion]

Ok, I've merged the branch 'vtk-image-conversion' into the VES next
branch.  While testing it, I did find a bug, which might be the same issue
that you are facing- the background image only works if you set the
background image before the very first call to render().  I'll see if we
can get this bug sorted out.

Pat

On Sun, Oct 7, 2012 at 10:15 PM, Pat Marion <pat.marion at kitware.com> wrote:

> Oops, I see this code is actually not available in VES master.  It's on an
> unmerged topic branch on the stage remote.  I will merge it to the 'next'
> branch now and send another email when it's available.
>
> Pat
>
>
> On Sun, Oct 7, 2012 at 10:06 PM, Pat Marion <pat.marion at kitware.com>wrote:
>
>> Hi,
>>
>> Sorry for the missing code in vesKiwiViewerApp::setBackgroundTexture().
>> The feature was broken for a while so the code was commented out.  It is
>> working now, so I'll update the method with the correct  code.  You should
>> just need to do this:
>>
>>
>> // load image (could be a jpg or png)
>> vtkSmartPointer<vtkImageData> image =
>> vtkImageData::SafeDownCast(this->Internal->DataLoader.loadDataset(filename));
>>
>> // convert vtk image to ves image
>> vesImage::Ptr image =
>> vesKiwiDataConversionTools::ConvertImage(reader->GetOutput());
>>
>> // set background image on renderer
>> this->renderer()->background()->setImage(image);
>>
>>
>> Pat
>>
>>
>>  On Sun, Oct 7, 2012 at 9:25 PM, Walter Alejandro Diaz Reginensi <
>> wadrwadr at gmail.com> wrote:
>>
>>>  Hello,
>>> Very nice to join the mail list!!
>>> I started studying kiviwiewer and ves/vtk just a few days ago trying to
>>> put an image as background in kiwiviewer.
>>> I found the function that should do it
>>>
>>> KiwiviewerApp::setBackgroundTexture(const std:string & fileName);
>>>
>>> but has no code inside it, so I tried this :
>>>
>>> void vesKiwiViewerApp::setBackgroundTexture(const std::string& filename)
>>>
>>> {
>>>
>>>      vtkSmartPointer<vtkJPEGReader> reader =
>>> vtkSmartPointer<vtkJPEGReader>::New();
>>>
>>>     reader->SetFileName(filename);
>>>
>>>     reader->Update();
>>>
>>>     vtkSmartPointer<vtkImageData> image = reader->GetOutput();
>>>
>>>     assert(image);
>>>
>>>     vtkSmartPointer<vtkUnsignedCharArray> pixels =
>>> vtkUnsignedCharArray::SafeDownCast(image->GetPointData()->GetScalars());
>>>
>>>     int width = image->GetDimensions()[0];
>>>
>>>     int height = image->GetDimensions()[1];
>>>
>>>     assert(pixels);
>>>
>>>     assert(pixels->GetNumberOfTuples() == width*height);
>>>
>>>     this->Image = vesImage::Ptr(new vesImage());
>>>
>>>     this->Image->setWidth(width);
>>>
>>>     this->Image->setHeight(height);
>>>
>>>     this->Image->setPixelFormat(pixels->GetNumberOfComponents() == 4 ?
>>> vesColorDataType::RGBA
>>>
>>>                             : pixels->GetNumberOfComponents() == 3 ?
>>> vesColorDataType::RGB
>>>
>>>                             : vesColorDataType::Luminance);
>>>
>>>     this->Image->setPixelDataType(vesColorDataType::UnsignedByte);
>>>
>>>     this->Image->setData(pixels->WriteVoidPointer(0, 0),
>>> pixels->GetSize());
>>>
>>>     this->renderer()->background()->setImage(this->Image);
>>>
>>> }
>>>
>>>
>>> The code above is based from a test file inside the repository
>>> called TestTexturedBackground.cpp
>>>
>>> This should work but doesn't, the functions did not return any errors so
>>> I assume that I'm configuring all ok, but the background is not rendered at
>>> all.
>>>
>>> Can you please help me?
>>>
>>> Thanks in advance.
>>>
>>> Walter
>>>
>>> _______________________________________________
>>> Ves mailing list
>>> Ves at public.kitware.com
>>> http://public.kitware.com/cgi-bin/mailman/listinfo/ves
>>>
>>>
>>
>
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