Alyssa Rosenzweig
2adb0f31fc
While desktop GL supports sampler LOD bias, GLES does not. To support the GL use case, all Gallium drivers are expected to handle sampler LOD bias. However, this may require shader code to implement (lowering tex to txb, txl to fadd+txl) and cost resources to push the LOD bias constants into the shader. The issue is compounded with something like Dolphin's GLES renderer, which does this LOD bias emulation itself -- meaning that LOD bias is lowered twice when using Dolphin with GLES! As such, this commit adds a context flag for frontends to communicate that they will never use sampler LOD bias, allowing the driver to omit the lowering as a GLES fast path (or, for Dolphin, for performance parity between GLES and GL). This will be used on Asahi. It could also be used to optimize a path on Mali-T720 supported in Panfrost, though I don't intend to write that patch. Originally https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25034 Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Reviewed-by: Marek Olšák <marek.olsak@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25052>
`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.