On 24 April 2013 09:32, Jianhua Shao <alex....@gmail.com> wrote: > > I build webkitgtk 1.9.92 by below configuration > ./configure --prefix=/usr --enable-accelerated-compositing > --enable-fast-mobile-scrolling --enable-jit --disable-webkit2 > --disable-plugin-process --disable-gtk-doc-html --with-gtk=2.0 > --with-acceleration-backend=opengl > > After that, I write a simple app to make the content of webview > transparent by calling webkit_web_view_set_transparent(). But it failed. > I tryied version 1.11.5, it also does not work. > The same app source code works in a old version of gtk-webkit, AFAIK, it > was about gtk-webkit 1.3. >
Can you try to build gtk-webkit 1.6.3 and see if it works? I experience a similar problem in which calling webkit_web_view_draw() with a custom Cairo context would behave strangely since gtk-webkit 1.8. In my case I wanted to save a webpage as a PDF with a Cairo context that's backed by a PDF surface. Since gtk-webkit 1.8 the PDF is composed of a big rasterized image and is no longer vectorial. >From what I saw in the code base of gtk-webkit 1.8, webkit_web_view_draw() is now using a backing buffer to do all it's rendering and doesn't take the Cairo context pass in argument into account, all that it does is to copy the backing buffer into the Cairo context. I believe that this is why you're losing the transparency in your main window and why my PDFs are no longer vectorial. Maybe someone that knows more about the internals of gtk-webkit can give use more insight. -- Emmanuel Rodriguez
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