On Mon, Jun 10, 2019 at 09:37:06AM +0300, Noam Rosenthal wrote: > ~ (reposting from webkit email)
Hi, I should pprobably give a little more context here, as the maintainer of the WebKitLegacy port for Haiku. Our main concern, as Rajagopalan mentionned, is that Haiku does not have any rendering acceleration, it's all done in software. We do have OpenGL but it may not be the best choice for rendering, because of this. As a result, we had to find a way to get things working, in what is indeed a little unusual setup. Currently we have coordinated graphics disabled: Source/cmake/OptionsHaiku.cmake:add_definitions(-DUSE_COORDINATED_GRAPHICS=0) We do however have a software rendering version of texture mapper, that was removed from webkit long time ago but we kept because we didn't want to use the OpenGL version. I have not reviewed its use recently, maybe it is not needed anymore. Another limitation we hit on some websites is that it is not possible for us to create too many drawable offscreen bitmaps. There is a system-wide limit of 4096, which can be hit rather easily on Google Maps, for example. So we will probably need a way to limit the use of drawable bitmaps when possible. Maybe coordinated graphics would help here, if it allows to share a single drawing context and bitmap, rather than creating a separate one for each rendering layer. On the way drawing works for us: the drawing primitives are all implemented in our display server, there is no rendering done client side in webkit processes. This means the display server has a pointer to the bitmap data already, and ideally it would be able to pass this from one application to another without needing to copy all the data. We may need to make some changes to our display server to allow this, but that's fine (it's the nice thing about Haiku, if we need to change something in the OS, we can do that easily). Now we have to find out if coordinated graphics or some other way to do things makes sense, and for this we have to understand how the rendering work is split between web process and ui process, and what kind of data they expect to exchange between them. Especially in our case where the bitmap data is in fact already shared with the OS display server, so if UI process does not do any drawing by itself, it doesn't actually need to access the data. -- Adrien. _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org https://lists.webkit.org/mailman/listinfo/webkit-dev
