Re: [Mesa-dev] [Mesa-users] Fwd: Issues with removal of classic OSMesa
Hi Andreas, Just as a clarification - SWR supports OSMesa, but MSAA support is limited. Jan -Original Message- From: mesa-dev On Behalf Of Andreas Fänger Sent: Tuesday, January 5, 2021 8:08 AM To: mesa-dev@lists.freedesktop.org Subject: Re: [Mesa-dev] [Mesa-users] Fwd: Issues with removal of classic OSMesa Hi Brian, thanks. >> BTW, when you say "antialiasing" below, what exactly do you mean? We are using GL_POLYGON_SMOOTH_HINT This works well for our use-case. However, if MSAA produces better results, then this would be good, too. In general, quality is really important for us. That's why we need both features, similar to the classic swrast renderer (but with a better performance) Andreas -Ursprüngliche Nachricht- Von: mesa-users Im Auftrag von Brian Paul Gesendet: Montag, 4. Januar 2021 20:47 An: mesa-dev@lists.freedesktop.org; mesa-us...@lists.freedesktop.org Betreff: [Mesa-users] Fwd: Issues with removal of classic OSMesa Hi Andreas, I'm forwarding your message to the mesa-dev list for better visibility. BTW, when you say "antialiasing" below, what exactly do you mean? -Brian Forwarded Message Subject:[Mesa-users] Issues with removal of classic OSMesa Date: Thu, 31 Dec 2020 12:56:04 +0100 From: Andreas Fänger To: mesa-us...@lists.freedesktop.org Hi, I've just seen that classic OSMesa has been removed (again) from Mesa3D a few weeks ago with this commit "mesa: Retire classic OSMesa". We are still actively using classical OSMesa for high quality rendering of still images in a headless environment with no GPU support (server-based rendering on windows and linux) Unfortunately, none of the alternative software renderers provide all the features that we require, which is antialiasing and anisotropic filtering. The current state is (correct me if I'm wrong) * softpipe: anisotropic filtering is supported, no antialiasing * llvmpipe: no anisotropic filtering, has MSAA * openswr: no anisotropic filtering, has MSAA, no OSMesa interface (?) We had hoped that classical OSMesa is only removed when there is a full replacement after the discussions in 2016 when OSMesa was about to be removed for the first time https://lists.freedesktop.org/archives/mesa-dev/2016-March/109665.html https://lists.freedesktop.org/archives/mesa-users/2016-March/001132.html and the commit that reverted the removal http://cgit.freedesktop.org/mesa/mesa/commit/?id=9601815b4be886f4d92bf74916d e98f3bdb7275c Are there any plans to enhance the renderers so that at least one of them is providing both anisotropic filtering and antialiasing? As far as I know, anisotropic texture filtering is also one of the OpenGL 4.6 requirements. In 2016 I was told that there are only very few developers involved in llvmpipe and that chances are not high that someone is going to port the softpipe anisotropic filtering implementation as llvmpipe is much more complex. Is there any change in that situation? If there are no such plans, is there any chance of reverting this commit again so that classical OSMesa is available for windows and linux in mesa >20? Regards, Andreas Fänger ___ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev - Intel Technology Poland sp. z o.o. ul. Sowackiego 173 | 80-298 Gdask | Sd Rejonowy Gdask Pnoc | VII Wydzia Gospodarczy Krajowego Rejestru Sdowego - KRS 101882 | NIP 957-07-52-316 | Kapita zakadowy 200.000 PLN. Ta wiadomo wraz z zacznikami jest przeznaczona dla okrelonego adresata i moe zawiera informacje poufne. W razie przypadkowego otrzymania tej wiadomoci, prosimy o powiadomienie nadawcy oraz trwae jej usunicie; jakiekolwiek przegldanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited. ___ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
Re: [Mesa-dev] Fwd: [Mesa-users] Issues with removal of classic OSMesa
Hi, llvmpipe could implement line and polygon smoothing by rasterizing in MSAA and passing the coverage to SampleMaskIn in the fragment shader, but doing Z/S tests and color writes and everything else single-sampled. Then, FragColor.a *= bitcount(SampleMaskIn) / (float)num_samples. It's roughly what OpenGL requires. There is at least one other gallium driver that does that. Marek On Mon, Jan 4, 2021 at 3:02 PM Brian Paul wrote: > Hi Andreas, > > I'm forwarding your message to the mesa-dev list for better visibility. > > BTW, when you say "antialiasing" below, what exactly do you mean? > > -Brian > > > Forwarded Message > Subject:[Mesa-users] Issues with removal of classic OSMesa > Date: Thu, 31 Dec 2020 12:56:04 +0100 > From: Andreas Fänger > To: mesa-us...@lists.freedesktop.org > > Hi, > > I've just seen that classic OSMesa has been removed (again) from Mesa3D > a few weeks ago with this commit "mesa: Retire classic OSMesa". > > We are still actively using classical OSMesa for high quality rendering > of still images in a headless environment with no GPU support > (server-based rendering on windows and linux) > > Unfortunately, none of the alternative software renderers provide all > the features that we require, which is antialiasing and anisotropic > filtering. The current state is (correct me if I'm wrong) > > * softpipe: anisotropic filtering is supported, no antialiasing > > * llvmpipe: no anisotropic filtering, has MSAA > > * openswr: no anisotropic filtering, has MSAA, no OSMesa interface (?) > > We had hoped that classical OSMesa is only removed when there is a full > replacement after the discussions in 2016 when OSMesa was about to be > removed for the first time > > https://lists.freedesktop.org/archives/mesa-dev/2016-March/109665.html > > https://lists.freedesktop.org/archives/mesa-users/2016-March/001132.html > > and the commit that reverted the removal > > > http://cgit.freedesktop.org/mesa/mesa/commit/?id=9601815b4be886f4d92bf74916de98f3bdb7275c > > Are there any plans to enhance the renderers so that at least one of > them is providing both anisotropic filtering and antialiasing? > > As far as I know, anisotropic texture filtering is also one of the > OpenGL 4.6 requirements. > > In 2016 I was told that there are only very few developers involved in > llvmpipe and that chances are not high that someone is going to port the > softpipe anisotropic filtering implementation as llvmpipe is much more > complex. Is there any change in that situation? > > If there are no such plans, is there any chance of reverting this commit > again so that classical OSMesa is available for windows and linux in > mesa >20? > > Regards, > > Andreas Fänger > > ___ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/mesa-dev > ___ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
Re: [Mesa-dev] [Mesa-users] Fwd: Issues with removal of classic OSMesa
Hi Jan, thanks for the clarification! Andreas -Ursprüngliche Nachricht- Von: Zielinski, Jan Gesendet: Dienstag, 5. Januar 2021 18:37 An: Andreas Fänger ; mesa-dev@lists.freedesktop.org Betreff: RE: [Mesa-dev] [Mesa-users] Fwd: Issues with removal of classic OSMesa Hi Andreas, Just as a clarification - SWR supports OSMesa, but MSAA support is limited. Jan -Original Message- From: mesa-dev On Behalf Of Andreas Fänger Sent: Tuesday, January 5, 2021 8:08 AM To: mesa-dev@lists.freedesktop.org Subject: Re: [Mesa-dev] [Mesa-users] Fwd: Issues with removal of classic OSMesa Hi Brian, thanks. >> BTW, when you say "antialiasing" below, what exactly do you mean? We are using GL_POLYGON_SMOOTH_HINT This works well for our use-case. However, if MSAA produces better results, then this would be good, too. In general, quality is really important for us. That's why we need both features, similar to the classic swrast renderer (but with a better performance) Andreas -Ursprüngliche Nachricht- Von: mesa-users Im Auftrag von Brian Paul Gesendet: Montag, 4. Januar 2021 20:47 An: mesa-dev@lists.freedesktop.org; mesa-us...@lists.freedesktop.org Betreff: [Mesa-users] Fwd: Issues with removal of classic OSMesa Hi Andreas, I'm forwarding your message to the mesa-dev list for better visibility. BTW, when you say "antialiasing" below, what exactly do you mean? -Brian Forwarded Message Subject:[Mesa-users] Issues with removal of classic OSMesa Date: Thu, 31 Dec 2020 12:56:04 +0100 From: Andreas Fänger To: mesa-us...@lists.freedesktop.org Hi, I've just seen that classic OSMesa has been removed (again) from Mesa3D a few weeks ago with this commit "mesa: Retire classic OSMesa". We are still actively using classical OSMesa for high quality rendering of still images in a headless environment with no GPU support (server-based rendering on windows and linux) Unfortunately, none of the alternative software renderers provide all the features that we require, which is antialiasing and anisotropic filtering. The current state is (correct me if I'm wrong) * softpipe: anisotropic filtering is supported, no antialiasing * llvmpipe: no anisotropic filtering, has MSAA * openswr: no anisotropic filtering, has MSAA, no OSMesa interface (?) We had hoped that classical OSMesa is only removed when there is a full replacement after the discussions in 2016 when OSMesa was about to be removed for the first time https://lists.freedesktop.org/archives/mesa-dev/2016-March/109665.html https://lists.freedesktop.org/archives/mesa-users/2016-March/001132.html and the commit that reverted the removal http://cgit.freedesktop.org/mesa/mesa/commit/?id=9601815b4be886f4d92bf74916d e98f3bdb7275c Are there any plans to enhance the renderers so that at least one of them is providing both anisotropic filtering and antialiasing? As far as I know, anisotropic texture filtering is also one of the OpenGL 4.6 requirements. In 2016 I was told that there are only very few developers involved in llvmpipe and that chances are not high that someone is going to port the softpipe anisotropic filtering implementation as llvmpipe is much more complex. Is there any change in that situation? If there are no such plans, is there any chance of reverting this commit again so that classical OSMesa is available for windows and linux in mesa >20? Regards, Andreas Fänger ___ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev - Intel Technology Poland sp. z o.o. ul. Sowackiego 173 | 80-298 Gdask | Sd Rejonowy Gdask Pnoc | VII Wydzia Gospodarczy Krajowego Rejestru Sdowego - KRS 101882 | NIP 957-07-52-316 | Kapita zakadowy 200.000 PLN. Ta wiadomo wraz z zacznikami jest przeznaczona dla okrelonego adresata i moe zawiera informacje poufne. W razie przypadkowego otrzymania tej wiadomoci, prosimy o powiadomienie nadawcy oraz trwae jej usunicie; jakiekolwiek przegldanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited. ___ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
