[webkit-dev] help with porting
Julien Sanchez
julien.sanchez at limgeo.com
Fri May 23 05:11:22 PDT 2008
Hello Luka,
I used the following path from clutter repository:
http://svn.o-hand.com/view/clutter/trunk/clutter-webkit/webkit-frame-show-cairo.patch?rev=2031&view=markup
As a rough prototype, I adapted an "OffscreenWebkit" class inspired from
the ClutterWebkitClass from clutter-webkit
(http://svn.o-hand.com/view/clutter/trunk/clutter-webkit/clutter-webkit.c?rev=2030&view=markup)
and more especially in load_finished_cb:
static void load_finished_cb (WebKitWebView *web_view,
WebKitWebFrame *frame,
OffscreenWebkit *webkit)
{
g_print ("load_finished_cb\n");
OffscreenWebkitPrivate *priv = OFFSCREEN_WEBKIT_GET_PRIVATE(webkit);
cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
priv->width, priv->height);
cairo_t* cr_surf = cairo_create(surf);
cairo_rectangle (cr_surf, 0, 0, priv->width, priv->height);
webkit_web_frame_show (frame, cr_surf);
cairo_surface_write_to_png(surf, "webkitsurf.png");
cairo_surface_destroy(surf);
surf =
cairo_pdf_surface_create("webkitsurf.pdf", priv->width, priv->height);
cr_surf = cairo_create(surf);
cairo_rectangle (cr_surf, 0, 0, priv->width, priv->height);
webkit_web_frame_show (frame, cr_surf);
cairo_surface_show_page(surf);
cairo_surface_finish(surf);
cairo_surface_destroy(surf);
g_main_loop_quit(loop);
}
It works but I wonder if it is possible to to the same without an X
server (I just tried with the gtk-directfb port :./configure
--enable-debug --with-target=directfb but it does not work. I don't know
how to use directfb and if it will be efficient.
Julien
Le vendredi 23 mai 2008 à 13:32 +0200, Luka Napotnik a écrit :
> Hello Julien.
>
> So you didn't draw the webkitview widget at all but stil managed to get
> a cairo drawing from the engine? If so, could you please tell me how did
> you do that?
>
> Greets,
> Luka
>
> Dne 23.05.2008 (pet) ob 12:58 +0200 je Julien Sanchez zapisal(a):
> > Hello,
> >
> > I'm interested too in such a port because I'm trying to render simple
> > html (no plugins or widgets) into image and pdf backends.
> > For the moment, I made a simple hack (inspired from Clutter project) to
> > render into a cairo surface. It works from the command line but it still
> > depends from X (and GTK) and I don't know where to begin to get rid of
> > these dependencies.
> >
> > Julien
> >
> > Le jeudi 22 mai 2008 à 09:30 -0700, Mike Emmel a écrit :
> > > Luka I don't think it makes a difference if your running a lot of
> > > thumbnails you would want to use gpu's some sort of render
> > > farm arrangement. My port does it as a result of the design not
> > > because of a strong desire to render with the cpu.
> > > Also for real world web pages your going to have problems with plugins
> > > which depend on X11 and native widget libraries.
> > >
> > > So although its possible with my port I can't see a single real
> > > problem that can be solved with this approach.
> > > Gtk/DirectFB will work for most pages if you have a flash port. Thats
> > > the number one stumbling block.
> > > I did my headless version of DirectFB for example to use the DirectFB
> > > video provider for the media tags.
> > > You can take other approaches but you would need to consider at a
> > > minimum flash and the media tags.
> > > For complete font support your going to have to use pango or go with
> > > the QT port but the QT port gets you back
> > > to the plugin issues if you don't use X11 and a lot of plugins use GTK so....
> > >
> > >
> > > As far as releasing I'm not in control of the release cycle except for
> > > creating delays as I work on stuff :(
> > > It should be released however some time this year.
> > >
> > > I obviously don't disagree with your idea in fact I worked hard to
> > > ensure my approach was adaptable so it could be used for these types
> > > of use cases so someday we will have what your looking for if things
> > > go well. I actually designed it to work
> > > with all the legacy use cases I mentioned but be flexible enough to
> > > transparently drop them when replacements without the legacy X11/Gtk
> > > dependencies become available. So soon a framework will be available
> > > to allow you to reverse software
> > > bloat but I've got no idea if software developers will accept it. I
> > > built it to deal with the problems that occur with our new embedded
> > > devices that have capabilities rivaling desktops where bloat is a huge
> > > problem. The fact it can do what your asking makes me confident the
> > > design is correct in fact it solves problems your not considering.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > On Thu, May 22, 2008 at 8:41 AM, Luka Napotnik <luka.napotnik at gmail.com> wrote:
> > > > Wow really? Could you share the port please. I've been looking for such
> > > > a port to save the cairo painting to a PNG image.
> > > >
> > > > Greets,
> > > > Luka
> > > >
> > > > Dne 22.05.2008 (čet) ob 07:41 -0700 je Mike Emmel zapisal(a):
> > > >> I actually have a WebKit port with no dependencies but Cairo.
> > > >>
> > > >>
> > > >>
> > > >> On Thu, May 22, 2008 at 7:02 AM, Luka Napotnik <luka.napotnik at gmail.com> wrote:
> > > >> > Hello Mike.
> > > >> >
> > > >> > What I need is a WebKit port that is independent of any display server
> > > >> > (X or a framebuffer). I only want to render the page to an image. And
> > > >> > since cairo is a great graphics library I think It's a good start.
> > > >> >
> > > >> > Greets,
> > > >> > Luka
> > > >> >
> > > >> > Dne 22.05.2008 (čet) ob 06:49 -0700 je Mike Emmel zapisal(a):
> > > >> >> Use the GTK DirectFB backend.
> > > >> >>
> > > >> >> I have a memory only system that I really need to get into the trunk.
> > > >> >> But if you have a graphics card in the system the fb0 will work.
> > > >> >>
> > > >> >> Its on my TODO to get the mem only system checked in and I can give
> > > >> >> you a patch in the mean time if its a issue. Also you can use the vnc driver
> > > >> >> as a virtual framebuffer.
> > > >> >>
> > > >> >> Also some of the XServers should work in a similar way so you can probably
> > > >> >> play the same trick with the right X11 server.
> > > >> >>
> > > >> >>
> > > >> >> On Thu, May 22, 2008 at 4:21 AM, Luka Napotnik <luka.napotnik at gmail.com> wrote:
> > > >> >> > Hello.
> > > >> >> >
> > > >> >> > I am interested in porting webkit to cairo for off-screen rendering
> > > >> >> > without a X server. As I cannot find any documents about porting to
> > > >> >> > other platform I would really appreciate if you could help me with some
> > > >> >> > hints about porting webkit.
> > > >> >> >
> > > >> >> > Greets,
> > > >> >> > Luka
> > > >> >> >
> > > >> >> > _______________________________________________
> > > >> >> > webkit-dev mailing list
> > > >> >> > webkit-dev at lists.webkit.org
> > > >> >> > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
> > > >> >> >
> > > >> >> >
> > > >> >
> > > >
> > > _______________________________________________
> > > webkit-dev mailing list
> > > webkit-dev at lists.webkit.org
> > > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
> > >
> >
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