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8313016543
Now that we're working on lowered I/O, passing in the dual source blend colour via a sideband doesn't make any sense. The primary source blend colours are implicitly passed in as the sources of store_output intrinsics; likewise, we should get dual source blend colours from their respective stores. And since dual colours are only needed by blending, we can delete the stores as we go. That means nir_lower_blend now provides an all-in-one software lowering of dual source blending with no driver support needed! It even works for 8 dual-src render targets, but I don't have a use case for that. The only tricky bit here is making sure we are robust against different orders of store_output within the exit block. In particular, if we naively lower x = ... primary color = x y = ... dual color = y we end up emitting uses of y before it has been defined, something like x = ... primary color = blend(x, y) y = ... Instead, we remove dual stores and sink blend stores to the bottom of the block, so we end up with the correct x = ... y = ... primary color = blend(x, y) lower_io_to_temporaries ensures that the stores will be in the same (exit) block, so we don't need to sink further than that ourselves. Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com> Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21426> |
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`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.