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476be5cb27
They're too restricted for AFBC. Fix up instead. There are two problems at play: 1. We can't just map the format swizzle to the pixel format ordering on v7, because the "reordered" values aren't allowed with compression. 2. We can't just compose the format swizzle with the API swizzle, because the composed swizzle is applied to the border colour, so we need to be able to apply an inverted swizzle to the border colour. That only works for bijective format swizzles. Fortunately, there's a neat solution: decompose the format's swizzle into two swizzles, the first mapping to a reordering that IS allowed for compression, and the second a bijection. Then we use the allowed reordering when texturing, apply the bijective swizzle to the API swizzle, and apply the inverse of the bijective swizzle to the border colour. When we're sampling a border colour, what's now happening mathematically is: (API swizzle o bijective swizzle)((bijective swizzle^-1)(border colour)) = (API swizzle o (bijective swizzle o bijective swizzle^-1))(border colour) = API swizzle(border colour) which is exactly what we wanted. Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20311> |
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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.