09.09.2016, 17:46, "Mark Gilbert" <web...@gallery.co.uk>: > Hi Folks > > We have code which extracts RGB+A bitmaps from WebKit pages in real time. > Currently we do this via an OSX WebKit View in a window and by requesting the > bitmap through the OSX View mechanism (not directly from WebKit). It works > well and we get clean RGB+A in real time from the WebKit structure (usually..) > > However, we are finding that this approach does not always give us the > *performance* that we need, particularly where we have things like deep > opacity changes (eg fading things on and off). We have to disable some of the > 3d acceleration stuff in the WebKit view to ensure we continue to see changes > on the CPU side (otherwise the change happens on the GPU and we only see the > completed transition at the CPU side) > > I have seen other systems which are more deeply knitted into the guts of > WebKit which have better performance and I wondered if any WebKit experts > here could tell me where in the API of webkit I should look to pull out > bitmaps repeatedly (eg 25 FPS) > > I am reasonably familiar with the overall components of WebKit, but the > render layer / context arrangement is fairly complicated to unpick, I > understand that QT has a call something like: > QWebElement::render(QPainter*, QRect const&) (in QtWebKit) > > and this may be doing approximately what I want, but I dont want to use QT
For what reason? >, so I need to understand which WebKit calls this QWebElement::render is >digging into. Basically, it calls FrameView::paintContents(), for more details look at the code of QWebElement::render(): https://github.com/annulen/webkit/blob/qtwebkit-stable/Source/WebKit/qt/Api/qwebelement.cpp#L1467 > > Any ideas ? > > Thanks > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev -- Regards, Konstantin _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org https://lists.webkit.org/mailman/listinfo/webkit-dev
