Kenneth Graunke
b6878d456f
Intel Gen9 GPUs have hardware ASTC support, but have a bug where they don't handle denormalized values in void extent blocks correctly. This isn't that hard to work around - on upload, we can detect such blocks, and flush any denorms to zero. Because we're altering the data behind the application's back, and applications can theoretically ask to download the original unaltered image data, we unfortunately need to maintain shadow copies of the data. To make sure that we don't accidentally skip the void-extent flushing via any fast-upload paths, and support download correctly, we plug this into the st/mesa compressed texture format fallback paths, which store a CPU copy of the original image data, and upload altered data. This is unfortunately common code for what's likely to be a single driver's issue (on a single generation), but it beats replicating an entire framework we already have inside the driver. Fixes dEQP-GLES3.functional.texture.compressed.astc.void_extent_ldr.* using iris on Intel Gen9 GPUs. Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4167 Reviewed-by: Emma Anholt <emma@anholt.net> Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com> Acked-by: Matt Turner <mattst88@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21943>
`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.