Hi, Thanks for taking on this effort and the technical investigation that went into this!
One question I had asked on X: Does this have implications for font format support: Will WebKitGTK/WPE with Skia support COLRv1 fonts through Skia? Will it also support the Fontations Rust backend of Skia, that's in development? Thanks, Dominik On Fri, Feb 2, 2024 at 4:49 PM Carlos Garcia Campos via webkit-dev < webkit-dev@lists.webkit.org> wrote: > Hi WebKittens, > > At Igalia we have spent some time exploring different options to > replace the Cairo 2D rendering library in the GTK and WPE ports (we > even tried rolling our own library). Recently we decided to try Skia > and we have successfully integrated it in the WPE port. Right now we > can compile WebKit with Skia linked statically, as part of the CMake > build, and run a number benchmarks. This has allowed us to compare the > Skia GPU and CPU renderers with the existing Cairo one in different > devices. > > The results are very promising: benchmarks are faster than Cairo's CPU > rendering, specially with Skia's GPU renderer. The improvement varies > for each device, but in any case it is already clear that the change is > a net positive on every configuration we have tested. Additionally, the > integration in the build system is well isolated: importing Skia under > Source/ThirdParty there is no need for any additional dependencies, > patching Skia has not been needed, and the changes in WebKit are > limited to code from the WPE port. > > After talking to teams from Google, Sony, Apple and RedHat during this > week, everyone thinks using Skia will be a great improvement for the > GTK, WPE, PlayStation and WinCairo ports. Therefore, we would like to > start upstreaming what we have to the WebKit repository and continue > the work there. > > Points we need to consider: > > - Skia is licensed under the BSD 3-Clause “New” license, which > should be compatible with WebKit's. > > - The Skia source tree would add about 170MiB to the repository > under Source/ThirdParty. For the sake of comparison, libwebrtc weighs > 367MiB and ANGLE 73MiB. > > - We plan to update Skia frequently following Google's > recommendation. We have already agreed with the Skia maintainers to > stay in contact and will explore integrating an automated system to > test updates. We have also discussed Skia's security policy with > Google, and we will have a procedure in place to incorporate security > fixes, the latest when we start making releases using Skia. > > - We cannot promise a timeline at the moment but expect refactors > in the GTK and WPE ports after the initial integration. We have big > plans for rearchitecting the rendering pipeline to better take > advantage of GPUs, and we hope we can get rid of some complex code > while at it. > > Please let us know if you have any questions, we plan to do this job > sooner rather than later if there are no objections. We are very > excited about this move since we really think it will be a great step > ahead for the non Apple ports of WebKit, allowing the project to grow > even bigger and stronger. > > Best regards, > > - The Igalia team > > -- > Carlos Garcia Campos > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev >
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