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Date: Sun, 26 Jun 2022 14:58:15 +0100
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From: Jon Turney <jon.turney@dronecode.org.uk>
Subject: Re: fltk does not work on cygwin version octave-6.4.0
To: Tatsuro MATSUOKA <matsuoka@nuce.nagoya-u.ac.jp>,
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On 23/06/2022 00:05, Tatsuro MATSUOKA wrote:
> 
> [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
> 

Usually, this is what happens when the driver your graphics chipset 
isn't installed, it's just working in 'VGA mode'.

(Everything should still work, using the software OpenGL renderer, as if 
the X server was started with -nowgl)

But this doesn't seem to be the case, if a native Windows octave can 
find the hardware OpenGL renderer, which is a bit confusing.

Can you show the output of 'wglinfo'?

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