Jose Fonseca
5a1d3bcf26
This change adds: - an alternative rasterizer, which rasterizes bins in a left->right & top->bottom linear fashion; - triangle -> rectangle detection; - 1:1 blit detection; - a special TGSI -> LLVM IR code generation that uses 8-bit SSE integers in AoS fashion (as opposed to 32bits floats.) Altogether these changes yield a 2x to 3x performance improvement for 2D workloads. It was designed to render Windows 7 Aero and other Windows built-in 3D applications (like Windows Media Player, Internet Explorer 11, UWP applications) with minimum CPU utilization, but it should be generally applicable to other 2D-on-3D applications, like desktop compositors, HTML browsers, 3D based UI toolkits, etc. This was mostly the brainchild of Keith Whitwell back in 2010. I wrote TGSI -> AoS translation. And many others added bug-fixes and enhancements over the years: Roland Scheidegger, Brian Paul, and James Benton. Known issues: - piglit spec@!opengl 1.1@quad-invariance will warn that "left and right half should match" due to rounding error difference - These optimized paths to kick in is that depth-buffer must not be used, so some applications which want to benefit from these improvements might need to be modified to ensure they use painter's algorithm instead of depth-buffers. Reviewed-by: Roland Scheidegger <sroland@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> Acked-by: Keith Whitwell <keithw@vmware.com> v2: Incorporate Dave Airlie feedback: cleanup LP_DEBUG_xx; shrink 3+ empty lines. v3: silence unused var warning, adapt to new upstream code (point setup) Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11969>
`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 `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://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.