[Octave-bug-tracker] [bug #60759] test subplot fails on hi-res display

[Dmitri A. Sergatskov]

URL:
  <https://savannah.gnu.org/bugs/?60759>

                 Summary: test subplot fails on hi-res display 
                 Project: GNU Octave
            Submitted by: dasergatskov
            Submitted on: Wed 09 Jun 2021 07:14:47 PM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 6.2.90
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

test subplot is failing on Win10 laptop  with 4K (3840x2160) display:


>> test subplot
***** test
 hf = figure ("visible", "off");
 unwind_protect
   for ii = 1:9
     hax(ii) = subplot (3,3,ii);
   endfor
   subplot (3,3,1);
   assert (gca (), hax(1));
   subplot (2,1,1);
   assert (ishghandle (hax),[false(1,6), true(1,3)]);
 unwind_protect_cleanup
   delete (hf);
 end_unwind_protect
!!!!! test failed
ASSERT errors for:  assert (ishghandle (hax),[false(1, 6), true(1, 3)])

  Location  |  Observed  |  Expected  |  Reason
    (4)           1            0         Abs err 1 exceeds tol 0 by 1
    (5)           1            0         Abs err 1 exceeds tol 0 by 1
    (6)           1            0         Abs err 1 exceeds tol 0 by 1
>>
>> for ii = 1:9
     hax(ii) = subplot (3,3,ii);
   endfor
>>    subplot (3,3,1);
>>    assert (gca (), hax(1));
>>    subplot (2,1,1);
>> ishghandle (hax)
ans =

  0  0  0  1  1  1  1  1  1

>>



The output of


figure ();
for ii = 1:9
  hax(ii) = subplot (3,3,ii);
endfor
subplot (2,1,1);


is attached (this is with 200% display scaling). 

The display scaling does not seem to matter, but if I reduce the display
resolution to 2048x1152, the test passes
(at 2048x1536 it still fails). 

The test passes in Fedora 34 on the same laptop, so it seems to be Win10
specific. 

See additional discussion on
https://octave.discourse.group/t/release-candidate-available/1227/32.

Dmitri.
-- 





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File Attachments:


-------------------------------------------------------
Date: Wed 09 Jun 2021 07:14:47 PM UTC  Name: subplot_das_201210608_1.png 
Size: 21KiB   By: dasergatskov

<http://savannah.gnu.org/bugs/download.php?file_id=51534>

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