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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
838118462e
The fix was found by Karol Herbst a long time ago, but it was unclear why it helped or if it would create additional problems. This change adds a comment that explains what's going on, and in the process also normalizes the nv50 implementation to match. The coordinates which are fed to gl_Position map directly to pixel coordinates, since the viewport transform is disabled. If the framebuffer is MSAA, then that doesn't affect the pixel coordinates at all, it's just that each pixel has multiple samples. Note that this makes it really clear that this approach is inappropriate for EXT_framebuffer_multisample_blit_scaled, and also the 3d path will fail terribly for direct copies. Thankfully the 2d path normally takes care of this. Fixes KHR-GL43.packed_depth_stencil.blit.depth32f_stencil8 as well as scaling issues in a number of EXT_framebuffer_multisample-related piglit tests (although they continue to fail due to inaccuracies). Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> |
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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 gitlab for patches submission, review and discussions.