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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
i915_fpc_optimize_mov_before_tex replaces a MOV+TEX pair with a direct TEX from the input register when the MOV copies from the input with identity swizzle. But it only checked the source swizzle, not the MOV's writemask. When the MOV wrote a subset of the channels the TEX reads (e.g., MOV TEMP.y, IN.y before a 2D TEX that reads XY), the optimization replaced the TEX source with IN, losing the X channel that was set by a different MOV. This caused incorrect texture sampling coordinates in shaders with multi-MOV texcoord construction (blur filters, shadow maps, etc.). Fix: verify the MOV's dest writemask covers all channels the TEX instruction reads before applying the optimization. Assisted-by: Claude |
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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://docs.mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_): .. code-block:: sh $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ 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://docs.mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://docs.mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.