[vtkusers] Using fontconfig with vtkTextMapper/vtkTextProperty?

[David Lonie]

Correct -- Set ForceCompiledFonts off on vtkFreeTypeTools, and set the name
of the font using vtkTextProperty::SetFontFamilyAsString.

As you discovered, this requires the RenderingFreeTypeFontConfig module to
be enabled and linked to the final application. There is an example usage
in Rendering/FreeTypeFontConfig/Testing/Cxx/TestSystemFontRendering.cxx if
you get stuck.

Let us know if you have further issues, AFAIK this functionality is not
widely used.

HTH,
Dave

On Thu, Oct 20, 2016 at 9:34 AM, Elvis Stansvik <
elvis.stansvik at orexplore.com> wrote:

> 2016-10-20 14:49 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
> > 2016-10-20 14:48 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com>
> :
> >> 2016-10-20 14:06 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com
> >:
> >>> Hi,
> >>>
> >>> How can I load a system font through fontconfig and use it with
> >>> vtkTextMapper/vtkTextProperty?
> >>>
> >>> I've called vtkFreeTypeTools::GetInstance()->ForceCompiledFontsOff(),
> >>> but I can't find any API on vtkTextProperty to set a font family to
> >>> use for a fontconfig-based search.
> >>
> >> Am I supposed to pass the fontconfig family name (e.g. "Noto Sans") to
> >> vtkTextProperty::SetFontFamilyAsString(..) ? I tried it but it didn't
> >> seem to have any effect.
> >>
> >> In fact, I just had a look at the build log for the Debian package I
> >> built of 7.1.0.rc1, and it's not mentioning "FontConfig" at all (see
> >> attached log). Does that mean my build doesn't have fontconfig
> >
> > Sorry, forgot the attachment, here it is in case it's too big to be
> attached:
> >
> >     https://dl.dropboxusercontent.com/u/22350696/vtk7_7.1.0~rc1-
> 0ubuntu1_amd64.build.bz2
> >
> > Elvis
>
> Sorry for the noise. Just adding
> -DModule_vtkRenderingFreeTypeFontConfig=ON to my build and
> libfontconfig1-dev to the build dependencies, and I get
>
>     --  * vtkRenderingFreeTypeFontConfig, requested by
> Module_vtkRenderingFreeTypeFontConfig.
>
> in the VTK CMake output. Building now and will report back how it went.
>
> Still interested in if vtkTextProperty::SetFontFamilyAsString(..) is
> the right API to set the fontconfig family name.
>
> Elvis
>
> >
> >> support? Must I enable the FreeTypeFontConfig module explicitly? (not
> >> enough that fontconfig is found on the system?).
> >>
> >> Elvis
> >>
> >>>
> >>> Elvis
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