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a0b82c24b6
When creating explicit type, the alignment information is lost, thus
forcing explicit type users to recalculate the alignment using the same
size_align() function. Let's add a new field to cache this information.
Only structs, matrices, and vectors have and explicit alignment. Arrays
alignment is implicitly set to its element alignment and matrices are
required to have an alignment that matches that of its vector columns.
the concept of alignment simply doesn't apply to other types.
We make the strategic choice to not allow explicit alignments on
scalars. This is for a couple of reasons:
1. There are no cases today where we use explicit types where we want
any other alignment for scalars than natural alignment.
2. Vectors don't have a component alignment that's separate from the
explicit_alignment so it's impossible to get an explicitly aligned
scalar type which is the component of the explicitly aligned vector
type.
This choice may cause problems if we ever want to use explicitly laid
out types for things like varyings where we sometimes want vec4
alignment of scalars. We can deal with that when the time comes.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6472>
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| README.rst | ||
| REVIEWERS | ||
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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 `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.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.