X-Recipient: archive-cygwin AT delorie DOT com X-Original-To: cygwin AT cygwin DOT com Delivered-To: cygwin AT cygwin DOT com DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 6096C38582BA Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=dronecode.org.uk Authentication-Results: sourceware.org; spf=none smtp.mailfrom=dronecode.org.uk Authentication-Results: btinternet.com; auth=pass (PLAIN) smtp.auth=jonturney AT btinternet DOT com; bimi=skipped X-SNCR-Rigid: 613942902B1D0E94 X-Originating-IP: [86.139.167.41] X-OWM-Source-IP: 86.139.167.41 (GB) X-OWM-Env-Sender: jonturney AT btinternet DOT com X-VadeSecure-score: verdict=clean score=0/300, class=clean X-RazorGate-Vade: gggruggvucftvghtrhhoucdtuddrgedvfedrudeffedggeduucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuueftkffvkffujffvgffngfevqffopdfqfgfvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefkffggfgfuvfhfhfgjtgfgsehtkeertddtfeejnecuhfhrohhmpeflohhnucfvuhhrnhgvhicuoehjohhnrdhtuhhrnhgvhiesughrohhnvggtohguvgdrohhrghdruhhkqeenucggtffrrghtthgvrhhnpeekueekueeuudekhfefueeftdejjeefjefhtdfftddtvedvleehgedvffdtgeeitdenucffohhmrghinheptgihghifihhnrdgtohhmnecukfhppeekiedrudefledrudeijedrgedunecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehhvghloheplgduledvrdduieekrddurddutdehngdpihhnvghtpeekiedrudefledrudeijedrgedupdhmrghilhhfrhhomhepjhhonhdrthhurhhnvgihsegurhhonhgvtghouggvrdhorhhgrdhukhdpnhgspghrtghpthhtohepuddprhgtphhtthhopegthihgfihinhestgihghifihhnrdgtohhm X-RazorGate-Vade-Verdict: clean 0 X-RazorGate-Vade-Classification: clean Message-ID: Date: Tue, 21 Jun 2022 12:31:18 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.10.0 Subject: Re: fltk does not work on cygwin version octave-6.4.0 Content-Language: en-GB To: The Cygwin Mailing List References: <1014671988 DOT 1220984 DOT 1655788512175 DOT JavaMail DOT yahoo DOT ref AT mail DOT yahoo DOT co DOT jp> <1014671988 DOT 1220984 DOT 1655788512175 DOT JavaMail DOT yahoo AT mail DOT yahoo DOT co DOT jp> <20220621184441 DOT 3cb63f4b7df9c1f68d114878 AT nifty DOT ne DOT jp> <708606044 DOT 1246885 DOT 1655808489712 DOT JavaMail DOT yahoo AT mail DOT yahoo DOT co DOT jp> <20220621201800 DOT 4cf9fc45bfa42ed7fdadef59 AT nifty DOT ne DOT jp> From: Jon Turney In-Reply-To: <20220621201800.4cf9fc45bfa42ed7fdadef59@nifty.ne.jp> X-Spam-Status: No, score=-3570.4 required=5.0 tests=BAYES_00, FORGED_SPF_HELO, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, KAM_NUMSUBJECT, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, SPF_HELO_PASS, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: cygwin AT cygwin DOT com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com Sender: "Cygwin" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 25LBWNev007118 On 21/06/2022 12:18, Takashi Yano wrote: > On Tue, 21 Jun 2022 19:48:09 +0900 (JST) > Tatsuro MATSUOKA wrote: >>> From: "Takashi Yano" >>> To: "cygwin> >> Cc: "Tatsuro MATSUOKA" >>> Date: 2022/06/21 火 18:45 >>> Subject: Re: fltk does not work on cygwin version octave-6.4.0 >> >>> On Tue, 21 Jun 2022 14:15:12 +0900 (JST) >>> 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 >>> [...] > > However, it works as expected, except that the following error message > appears. > libGL error: Windows-DRI extention disabled for GDI Generic renderer > > $ env LIBGL_ALWAYS_SOFTWARE=1 octave > octave:1> graphics_toolkit fltk > octave:2> plot(1:10); > > also works. Unfortunately, LIBGL_ALWAYS_SOFTWARE doesn't behave the same everywhere, since the set of GLX visuals available with it is based on those available for direct rendering. This seems similar to [1], which I made some changes in libGL to try to address, but unfortunately that seems to never been resolved to a root cause. The "Insufficient GL support" message comes from octave, but since it doesn't say what GL support it needs but thinks is missing, it's hard to tell what the problem actually is. I guess finding where that comes from in the octave source code would be a good starting place. [1] https://cygwin.com/pipermail/cygwin/2018-June/237659.html -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple