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cc2a4ff880
Earlier, I just tried to copy what iris was doing and, as it turns out,
copied it wrong. Also, Vulkan doesn't have a concept of getting the
conservative coverage in the shader. The spec for SampleMask says:
"Decorating a variable with the SampleMask built-in decoration will
make any variable contain the coverage mask for the current fragment
shader invocation."
And the spec for conservative rasterization says
"When overestimate conservative rasterization is enabled, rather
than evaluating coverage at individual sample locations, a
determination is made of whether any portion of the pixel (including
its edges and corners) is covered by the primitive. If any portion
of the pixel is covered, then all bits of the coverage mask for the
fragment corresponding to that pixel are enabled."
Putting these two together and you get what the Intel HW docs say for
ICMS_NORMAL:
"Input Coverage masks based on inner conservatism and factors in
SAMPLE_MASKs. If Pixel is conservatively fully covered all samples
are enabled."
So I'm pretty sure based on this that the right thing to do here is to
ignore conservative rasterization and leave it set to ICMS_NORMAL
whenever we're not in the post-depth-coverage special case.
While we're here, fix the silly indentation.
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4565
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes:
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| .gitlab-ci | ||
| bin | ||
| build-support | ||
| docs | ||
| doxygen | ||
| include | ||
| src | ||
| subprojects | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .mailmap | ||
| .travis.yml | ||
| Android.common.mk | ||
| Android.mk | ||
| CleanSpec.mk | ||
| meson.build | ||
| meson_options.txt | ||
| README.rst | ||
| REVIEWERS | ||
| VERSION | ||
`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.