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
...

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
..

Regards
Marco



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