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For simple clients using the swap chain contention back pressure to regulate their drawing and that don't query buffer age introduce a new DRI option with which set to true (the default is false) we block the client until a new buffer is available. This way we stall the client's execution until a new buffer is available and the redrawing of the client starts only at this point and not before. The motivation for that is to reduce latency for clients that regulate their drawing by swapchain contention back pressure. These clients draw whenever possible and their drawing is implicitly stopping whenever we block. When we block at the end of the swap and return only when a new buffer is available the client can draw and we directly present. Otherwise the client would draw, we block on the buffer becoming available, and only then show what the client had drawn, usually one frame later. Co-authored-by: Michel Dänzer <michel@daenzer.net> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14684>
`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.