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Date: Thu, 27 Apr 2023 18:15:53 +0200 (CEST)
To: cygwin AT cygwin DOT com, Brian Inglis <Brian DOT Inglis AT Shaw DOT ca>
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 <9e079b92-8214-ea8f-4f48-16e6859c9888 AT Shaw DOT ca>
Subject: Re: problems with octave 8.2.0-1 and plotting
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From: Fabio Rossi via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Fabio Rossi <rossi DOT f AT inwind DOT it>
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Hello Brians,
thanks for the suggestions. I had already installed the xorg server and all the packages you mentioned. But nevertheless I get the errors reported in the original email, both if I start octave from the shell or by using the XDG menu which starts octave with the GUI.

In particular, in the second case I confirm all the opengl messages already reported and I get the following results in the octave command line:

>> getenv('XDG_CURRENT_DESKTOP')
ans = X-Cygwin
>> getenv('XDG_MENU_PREFIX')
ans = xwin-
>> getenv('XDG_RUNTIME_DIR')
ans =

From the shell all of the previous variables are of course empty. With the past versions of octave it was plotting when run from the bash.

Thanks,
Fabio

> Il 27/04/2023 17:48 Brian Inglis <brian DOT inglis AT shaw DOT ca> ha scritto:
> 
>  
> Hi Fabio,
> 
> Some packages include non-GUI or native GUI interfaces that do not require 
> window system support.
> 
> Others may dynamically support window systems if they are installed, or have 
> separate executables for console or GUI, as octave does: octave and octave-cli.
> 
> If you are using octave GUI, as it is linked against X window libraries, you 
> need to install the X window system.
> 
> If you install xinit, that will install the X Window server xorg-server, XDG 
> components xdg-user-dirs, xwin-xdg-menu, X Window clients.
> 
> If you then run it via the XWin Server Start Menu shortcut, it will define 
> $XDG_CURRENT_DESKTOP, $XDG_MENU_PREFIX, and $XDG_RUNTIME_DIR.
> 
> That should allow you to run octave GUI and display plot windows.
> 
> -- 
> Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada
> 
> La perfection est atteinte                   Perfection is achieved
> non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
> mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
>                                  -- Antoine de Saint-Exupéry
> 
> 
> On 2023-04-27 07:58, Fabio Rossi via Cygwin wrote:
> > I forgot to mention that the test machine is running Windows 10 Pro 64 bit with a ATI FirePro 3800 graphics card. On the same machine, octave built for Windows executes correctly the same command. I have observed the same behaviour also on other Windows machines running Win7 or other graphic adapters.
> > 
> > Fabio
> >> Il 26/04/2023 15:34 Fabio Rossi <rossi DOT f AT inwind DOT it> ha scritto:
> >>
> >>   
> >> I have installed latest test version of octave 8.2.0-1. When I try to plot using a simple command like "plot(1,1)" I get the following errors from the command line
> >>
> >> $ octave
> >> QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-XXXX+user'
> >> GNU Octave, version 8.2.0
> >> Copyright (C) 1993-2023 The Octave Project Developers.
> >> This is free software; see the source code for copying conditions.
> >> There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or
> >> FITNESS FOR A PARTICULAR PURPOSE.  For details, type 'warranty'.
> >>
> >> Octave was configured for "x86_64-pc-cygwin".
> >>
> >> Additional information about Octave is available at https://www.octave.org.
> >>
> >> Please contribute if you find this software useful.
> >> For more information, visit https://www.octave.org/get-involved.html
> >>
> >> Read https://www.octave.org/bugs.html to learn how to submit bug reports.
> >> For information about changes from previous versions, type 'news'.
> >>
> >> octave:1> plot(1,1)
> >> wglMakeCurrent error: 00000006
> >> wglMakeCurrent error: 00000006
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred in init_gl_context
> >> warning: called from
> >>      __uiobject_split_args__ at line 61 column 9
> >>      uimenu at line 94 column 13
> >>      __add_default_menu__ at line 59 column 5
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: called from
> >>      __uiobject_split_args__ at line 61 column 9
> >>      uimenu at line 94 column 13
> >>      __add_default_menu__ at line 59 column 5
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'figure' object
> >> warning: called from
> >>      __uiobject_split_args__ at line 61 column 9
> >>      uimenu at line 94 column 13
> >>      __add_default_menu__ at line 59 column 5
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> wglMakeCurrent error: 00000006
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred in init_gl_context
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uitoolbar' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'figure' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred in init_gl_context
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uitoolbar' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'figure' object
> >> warning: called from
> >>      __add_default_menu__ at line 165 column 3
> >>      figure at line 97 column 5
> >>      newplot at line 120 column 10
> >>      plot at line 234 column 9
> >>
> >> octave:2> wglMakeCurrent error: 00000006
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred in init_gl_context
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uimenu' object
> >> warning: opengl_renderer: Error 'invalid operation' (1282) occurred drawing 'uitoolbar' object
> >> warning: opengl_texture::create: the opengl library in use doesn't support images with either dimension larger than -367397472. Not rendering.
> >>
> >> The plot window is opened but becomes unresponsive, it is impossible to close it. The same happens if I start octave with the --gui option. The same happens also with latest stable 6.4.0-1 version

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