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envelope-from=arthur.miller@live.com; helo=EUR05-DB8-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/20 01:47:43 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:258166 Archived-At: Richard Stallman writes: > [[[ To any NSA and FBI agents reading my email: please consider ]]] > [[[ whether defending the US Constitution against all enemies, ]]] > [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > > > OpenGL features are queried at runtime, but I am not sure > > if this feature would be *legal* in Emacs; I mean loading a function > > pointer at runtime from a so/dll is essentially ffi, which I > > understand is not allowed in Emacs for legal purposes. > > If the function you are linking to is implemented by a > GPL-3-compatible library, Emacs can link to it in any way > that is convenient. It depends on the OpenGL implementation the user has installed on the system. I don't see how is that different from running Emacs on a non-free system, since Emacs has to link to a graphics library provided by OS, GDI on Windows for example, which in turn anyway link to same graphics driver that OpenGL/CL/EGL are linked to. Even on a GNU/Linux if user has an AMD/Nvidia gfx card there is some firmware blob that gets installed and graphcis applications inclusive Emacs run on it. > What is the source license of OpenGL 2.1? > I expect that it is GPL-3-compatible, but it can't hurt to verify that. OpenGL is an open standard developed by Khronos: www.opengl.org Mesa driver you have installed on your computer is open source, but I don't know if licence is "free" or not: https://docs.mesa3d.org/license.html