[webkit-dev] Transparency on GTK/DirectFB

[Weber, Bernd]

Thanks Christian, great pointers!

I got it working! Very cool!

-Bernd


For reference, here the changes I did in GtkLauncher:

static void
make_transparent(WebKitWebView* l_web_view)
{
    GValue val = {0,};
    g_value_init (&val, G_TYPE_BOOLEAN);
    g_value_set_boolean (&val, 1);
    g_object_set_property (G_OBJECT (l_web_view), "transparent", &val);
}

static void
make_transparent_cb (GtkWidget* widget, gpointer data)
{
    make_transparent (web_view);
}

static void
set_colormap(GtkWidget* window)
{
    GdkScreen* screen = gtk_widget_get_screen (window);
    GdkColormap* colormap = gdk_screen_get_rgba_colormap (screen);
    if (!colormap) {
    	g_warning ("No ARGB colormap available! Using RGB colormap!\n");
	colormap = gdk_screen_get_rgb_colormap (screen);
    } else {
    	g_print ("Using ARGB colormap now! :-)\n");
    }
    gtk_widget_set_colormap (window, colormap);
}

In main.c:
 main_window = create_window ();
 set_colormap(main_window);



-----Original Message-----
From: webkit-dev-bounces at lists.webkit.org
[mailto:webkit-dev-bounces at lists.webkit.org] On Behalf Of Christian
Dywan
Sent: Wednesday, September 24, 2008 3:48 PM
To: webkit-dev at lists.webkit.org
Subject: Re: [webkit-dev] Transparency on GTK/DirectFB

Am Wed, 24 Sep 2008 15:16:24 -0700
schrieb Darin Adler <darin at apple.com>:

> On Sep 24, 2008, at 3:10 PM, Weber, Bernd wrote:
> 
> > The holy grail however would be to achieve transparency to the  
> > underlying desktop, by defining "transparent" as the background
> > color.
> 
> WebKit definitely supports this. It's used this way in the Mac OS X  
> Dashboard.
> 
> > I'm not sure whether Webkit, especially with GTK/DirectFB,
> > supports this right now.
> 
> I don't know if the GTK/DirectFB port supports it. That's a question  
> for someone else.

Take a look at the headers. There's no other documentation at this
point but it should be intuitive enough for most of what we have.

webkit_web_view_set_transparent

You will want that. And make sure you have an ARGB colour map on your
window, ie. when you create your toplevel window.

ciao,
    Christian
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