[Octave-bug-tracker] [bug #53186] Without osmesa it is not possible to print/getframe invisible figures

[Pantxo Diribarne]

URL:
  <http://savannah.gnu.org/bugs/?53186>

                 Summary: Without osmesa it is not possible to print/getframe
invisible figures
                 Project: GNU Octave
            Submitted by: pantxo
            Submitted on: Sun 18 Feb 2018 10:41:22 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

I attached a very preliminary cset (no configure time checks at least ...)
that makes "getframe" and "print" work without osmesa when figures are
invible. Basically, using QOffscreenSurface (Qt5.1+), we can create a valid
opengl context without the need of a visible QOpenGLWidget.

I also made use (for getframe) of QOpenGLFramebufferObject, in order to have
suitably sized render buffers when the figure is invisible.



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File Attachments:


-------------------------------------------------------
Date: Sun 18 Feb 2018 10:41:22 PM UTC  Name: qt_print_invible.patch  Size:
9KiB   By: pantxo

<http://savannah.gnu.org/bugs/download.php?file_id=43351>

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