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Eric and I would like a bitmask of which samplers are used, similar to prog->SamplersUsed, but available in NIR. The linker uses SamplersUsed for resource limit checking, but later optimizations may eliminate more samplers. So instead of propagating it through, we gather a new one. While there, we also gather the existing textures_used_by_txf bitmask. Gathering these bitfields in nir_shader_gather_info is awkward at best. The main reason is that it introduces an ordering dependency between the two passes. If gathering runs before lower_samplers_as_deref, it can't look at var->data.binding. If the driver doesn't use the full lowering to texture_index/texture_array_size (like radeonsi), then the gathering can't use those fields. Gathering might be run early /and/ late, first to get varying info, and later to update it after variant lowering. At this point, should gathering work on pre-lowered or post-lowered code? Pre-lowered is also harder due to the presence of structure types. Just doing the gathering when we do the lowering alleviates these ordering problems. This fixes ordering issues in i965 and makes the txf info gathering work for radeonsi (though they don't use it). Reviewed-by: Eric Anholt <eric@anholt.net> |
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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.html <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.html <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 `Freenode's #dri-devel <irc://chat.freenode.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.html <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.html <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses email mailing-lists for patches submission, review and discussions.