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Adds an optional region selection, based off percentages of the starting/ending of an image's X & Y values. This is intended as a performance enhancement tradeoff for smaller images to be created. With a smaller image size, the screenshotting layer will change the region boundaries on the GPU side, which will decrease the amount of time it takes to copy the image over to CPU-accessible memory. Using vkcube as an example, the original image size is 500x500: mesa-screenshot: DEBUG: Screenshot Authorized! mesa-screenshot: DEBUG: Needs 2 steps mesa-screenshot: DEBUG: Time to copy: 123530 nanoseconds Then, by cropping the area to a 100x100 image, we get the following: mesa-screenshot: DEBUG: Screenshot Authorized! mesa-screenshot: DEBUG: Using region: startX = 40% (200), startY = 40% (200), endX = 60% (300), endY = 60% (300) mesa-screenshot: DEBUG: Needs 2 steps mesa-screenshot: DEBUG: Time to copy: 12679 nanoseconds For this example, this is a ~90% time reduction improvement! Overall, this option reduces the copy time to a point where it can become negligible, relative to the frame time of the application. Signed-off-by: Casey Bowman <casey.g.bowman@intel.com> Reviewed-by: Felix DeGrood felix.j.degrood@intel.com Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32016> |
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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://docs.mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_): .. code-block:: sh $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ 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://docs.mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://docs.mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.