bugGNU Octave - Bugs: bug #49705, Transparency not supported in...

 
 

bug #49705: Transparency not supported in printout

Submitted by:  None
Submitted on:  Sat 26 Nov 2016 02:21:45 PM UTC  
 
Category: Plotting with OpenGLSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Inaccurate Result
Status: ConfirmedAssigned to: None
Originator Name: Originator Email: -unavailable-
Open/Closed: OpenRelease: 4.2.0
Operating System: Any

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Fri 13 Oct 2017 08:25:19 AM UTC, comment #2:

I ran the plot comparison script and could find no case where the workaround in comment #1 failed to produce a better looking output.
I thus pushed the following cset to workaround the lack of line transparency support in gl2ps:

http://hg.savannah.gnu.org/hgweb/octave/rev/5d2d0e570e46

Leaving this report open until a proper fix is found.

Pantxo Diribarne <pantxo>
Project Member
Sat 26 Nov 2016 09:55:44 PM UTC, comment #1:

Hi,

Yes, the only output format that currently supports transparency is svg.

There are couple of workarounds:

  • use svg format and an external tool such as inkscape to convert to whatever format
  • do not use transparency and replace by a light gray, something like:
  • use "graphics_toolkit ('gnuplot')" which supports transparency

Retitling to better reflect that the root cause is transparency in printout

Pantxo Diribarne <pantxo>
Project Member
Sat 26 Nov 2016 02:21:45 PM UTC, original submission:

When plotting the grid everything is right in the figure image. When saving the image the grid width and color is the same as the axis.

Using Octave 4.2 on Windows 10.

Anonymous

 

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Attached Files
file #39075:  octave_screenshot.PNG added by None (18KiB - image/png - screenshot and saved image difference)
file #39076:  octave_saving.png added by None (12KiB - image/png - screenshot and saved image difference)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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  • -unavailable- added by pantxo (Posted a comment)
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    Follow 6 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sat 26 Nov 2016 09:55:44 PM UTCpantxoCategoryPlotting=>Plotting with OpenGL
      StatusNone=>Confirmed
      Operating SystemMicrosoft Windows=>Any
      Summarysaving plot images with grid=>Transparency not supported in printout
    Sat 26 Nov 2016 02:21:45 PM UTCNoneAttached File-=>Added octave_screenshot.PNG, #39075
      Attached File-=>Added octave_saving.png, #39076

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