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Date: Thu, 23 Jun 2022 08:05:06 +0900 (JST)
From: Tatsuro MATSUOKA <tmacchant2@yahoo.co.jp>
To: Marco Atzeri <marco.atzeri@gmail.com>,
        Tatsuro MATSUOKA <matsuoka@nuce.nagoya-u.ac.jp>,
        "cygwin@cygwin.com" <cygwin@cygwin.com>
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Subject: Re: fltk does not work on cygwin version octave-6.4.0
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> ----- Original Message -----
 > From: "Marco Atzeri" 
> To: "Tatsuro MATSUOKA"  "cygwin
> Date: 2022/06/23 木 04:33
> Subject: Re: fltk does not work on cygwin version octave-6.4.0
> On 22.06.2022 12:37, Tatsuro MATSUOKA wrote:
> >> ----- Original Message -----
> >> From: "Tatsuro MATSUOKA"
> >> To: "Marco Atzeri"; "cygwin
> >> Date: 2022/06/22 水 12:53
> >> Subject: Re: fltk does not work on cygwin version octave-6.4.0
> >>>> ----- Original Message -----
> >>>> From: "Marco Atzeri"
> >>>> To: "cygwin
> >>>> Date: 2022/06/22 水 02:06
> >>>> Subject: Re: fltk does not work on cygwin version octave-6.4.0
> >>>> On 21.06.2022 07:15, Tatsuro MATSUOKA wrote:
> >>>>> fltk does not work on cygwin version octave-6.4.0
> >>>>>
> >>>>> octave:1> graphics_toolkit fltk
> >>>>> octave:2> plot(1:10);
> >>>>> Insufficient GL support
> >>>>> error: unable to plot due to insufficient OpenGL support
> >>>>>
> >>>>> plot windows flashes and disappear immediately
> >>>>>
> >>>>> fltk graphics_toolkit works octave on native windows.
> 
> > Is the below related to the issue?
> > 
> >>> __opengl_info__
> > warning: __opengl_info__: can not obtain OpenGL information
> > warning: called from
> >      __opengl_info__ at line 69 column 5
> > 
> > Similar behaviors happen qt graphics on octave-7.1.0 on native Windows.
> > 
> > Tatsuro
> > 
> 
> Maybe.
> 
> On my PC
> 
> $ octave
> 
> octave:1> __opengl_info__
>     version: 4.5.0 - Build 22.20.16.4815
>      vendor: Intel
>    renderer: Intel(R) UHD Graphics 620
> extensions:
>    GL_3DFX_texture_compression_FXT1
>   .....
> 
> Similar to the X log
> 
> glWinSelectGLimplementation: Loaded 'cygnativeGLthunk.dll'
> (II) AIGLX: Testing pixelFormatIndex 1
> GL_VERSION:     4.5.0 - Build 22.20.16.4815
> GL_VENDOR:      Intel
> GL_RENDERER:    Intel(R) UHD Graphics 620
> (II) GLX: enabled GLX_SGI_make_current_read
> ...

[132545.312] (II) AIGLX: Testing pixelFormatIndex 2
[132545.343] GL_VERSION:     1.1.0
[132545.343] GL_VENDOR:      Microsoft Corporation
[132545.343] GL_RENDERER:    GDI Generic
[132545.343] wglwrap: Can't resolve "wglGetExtensionsStringARB"
[132545.343] (EE) AIGLX: Won't use the generic native renderer as it is not accelerated
[132545.343] glWinSelectGLimplementation: Loaded 'cygGL-1.dll'
[132548.078] (II) IGLX: Loaded and initialized swrast
[132548.078] (II) GLX: Initialized DRISWRAST GL provider for screen 0


> You can test the GL behaviour with
> 
> $ cygcheck -l mesa-demos | grep bin
> /usr/bin/eglinfo
> /usr/bin/es2_info
> /usr/bin/glinfo
> /usr/bin/glxgears
> /usr/bin/glxinfo
> /usr/bin/wglgears
> /usr/bin/wglinfo
> /usr/bin/xeglgears

$ cygcheck -l mesa-demos | grep bin
/usr/lib/mesa-demos/fbobind.exe
/usr/lib/mesa-demos/pbinfo.exe
/usr/bin/eglinfo
/usr/bin/es2_info
/usr/bin/glinfo
/usr/bin/glxgears
/usr/bin/glxinfo
/usr/bin/wglgears
/usr/bin/wglinfo
/usr/bin/xeglgears


Tatsuro


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