[Octave-bug-tracker] [bug #49216] title texts in qt plots are "ugly"

[Hartmut]

URL:
  <http://savannah.gnu.org/bugs/?49216>

                 Summary: title texts in qt plots are "ugly"
                 Project: GNU Octave
            Submitted by: hardy
            Submitted on: Wed 28 Sep 2016 06:42:37 PM GMT
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Inaccurate Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.3
        Operating System: Any

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Details:

This happens with qt plots (Octave 4.2.0-rc2, Octave 4.0.3, and before) under
Win and Linux OS:

The title text of plots is printed in bold. Once it reaches a readable
fontsize this texts looks quite "ugly". There might be missing some
anti-aliasing?

Here is a short script to show what I mean:

clear, close all;
plot(1:10);
title('Title-Text: SNR', 'fontsize', 14);


I will attach screenshots of the resulting figures. (The Octave-Linux figure
used fonsize 18 instead, to get comparably sized text). Espacially the "N"
character in Octave-Windows does not look very nice. I have done the
screenshots also with Matlab-Windows and with Octave-Linux (the screenshot
program in Linux wasn't quite able to reproduce this "ugliness", it seemd to
do some anti-aliasing on its own. I will attach the image anyways.)

Note: This bug report is not about the incorrect fontsize of the displayed
text, this already covered in bug #45600.



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File Attachments:


-------------------------------------------------------
Date: Wed 28 Sep 2016 06:42:37 PM GMT  Name:
Octave-4.2.0-rc2_Win7_fontsize14.jpg  Size: 78kB   By: hardy

<http://savannah.gnu.org/bugs/download.php?file_id=38616>
-------------------------------------------------------
Date: Wed 28 Sep 2016 06:42:37 PM GMT  Name: Octave-4.0.3_Linux_fontsize18.png
 Size: 790kB   By: hardy

<http://savannah.gnu.org/bugs/download.php?file_id=38617>
-------------------------------------------------------
Date: Wed 28 Sep 2016 06:42:37 PM GMT  Name: ML_Win7_fontsize14.jpg  Size:
102kB   By: hardy

<http://savannah.gnu.org/bugs/download.php?file_id=38618>

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