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.
Why I want to a build a new version of gtk-webkit, is to use the
compositing accelerating feature.
Anyone know something about this problem?
The test code is here:
-----------app code---------
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <webkit/webkit.h>
#include <stdlib.h>
#include <string.h>
static void destroy_cb(GtkWidget* widget, gpointer data) {
gtk_main_quit();
}
bool transparent = true;
bool decorate = false;
int width = 800;
int height = 480;
gchar * url = "/home/meego/httproot/htdocs/hmi/hmi/index.html";
char *window_name = "HMI";
WebKitWebView* view;
GdkColormap* rgba;
GdkScreen* screen;
gint key_press_cb(GtkWidget *widget, GdkEventKey *kevent, gpointer data) {
GtkWidget *btn = (GtkWidget *)data;
if(kevent->type == GDK_KEY_PRESS && kevent->keyval == 'p') {
GdkPixbuf * pixbuf;
pixbuf = gdk_pixbuf_get_from_drawable( NULL,
GTK_WIDGET(view)->window, rgba, 0, 0, 0, 0, 600, 400 );
gdk_pixbuf_save(pixbuf, "/home/meego/dump.png", "png", NULL, NULL);
printf("colormap is %s\n", rgba ? "not NULL" : "NULL");
printf("screen %s compoisted\n", gdk_screen_is_composited(screen)?
"is" : "is not");
printf("webview %s transparent\n",
webkit_web_view_get_transparent(view) ? "is" : "is not");
}
return TRUE;
}
static gboolean window_delete_event(GtkWidget *widget, GdkEvent *event,
gpointer user_data)
{
gtk_widget_destroy(widget);
gtk_main_quit();
return TRUE;
}
int main(int argc, char* argv[]) {
int ret;
if(argc >= 2) {
url = argv[1];
}
gtk_init(&argc, &argv);
// Create a Window, set colormap to RGBA
GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
screen = gtk_widget_get_screen(window);
rgba = gdk_screen_get_rgba_colormap (screen);
gtk_window_set_title(GTK_WINDOW(window), (const gchar*)window_name);
if (rgba && gdk_screen_is_composited (screen)) {
gtk_widget_set_default_colormap(rgba);
gtk_widget_set_colormap(GTK_WIDGET(window), rgba);
}
gtk_widget_set_size_request(window, width, height);
if(!decorate)
{
gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
}
view = WEBKIT_WEB_VIEW(webkit_web_view_new());
gtk_widget_set_colormap(GTK_WIDGET(view), rgba);
if(transparent) {
if(gdk_screen_is_composited(screen)) {
printf("set transparent\n");
webkit_web_view_set_transparent(view, TRUE);
}
}
WebKitWebSettings *settings = webkit_web_settings_new();
if(NULL == settings) {
return -1;
} else {
g_object_set (G_OBJECT(settings),
"enable-file-access-from-file-uris", TRUE, NULL);
g_object_set (G_OBJECT(settings), "enable-default-context-menu",
FALSE, NULL);
webkit_web_view_set_settings (WEBKIT_WEB_VIEW(view), settings);
}
gtk_container_add (GTK_CONTAINER(window), GTK_WIDGET(view));
g_signal_connect(window, "delete-event",
G_CALLBACK(window_delete_event), NULL);
g_signal_connect(window, "destroy", G_CALLBACK(destroy_cb), NULL);
g_signal_connect(G_OBJECT(window), "key_press_event",
G_CALLBACK(key_press_cb), window);
//g_signal_emit_by_name(G_OBJECT(window), "activate", NULL);
// Load a default page
if (g_str_has_prefix(url, "http://";)
|| g_str_has_prefix(url, "https://";)
|| g_str_has_prefix(url, "file://"))
{
webkit_web_view_open(WEBKIT_WEB_VIEW(view), url);
} else {
gchar *t_url = NULL;
if (g_path_is_absolute(url)) {
t_url = g_strjoin("", "file://", url, NULL);
} else {
gchar *pwd = g_get_current_dir();
t_url = g_strjoin("/", "file://", pwd, url, NULL);
g_free(pwd);
}
webkit_web_view_open(WEBKIT_WEB_VIEW(view), t_url);
g_free(t_url);
}
gtk_widget_show_all(window);
gtk_main();
return 0;
}
-----------html code-----------
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "
http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>
<html xmlns="http://www.w3.org/1999/xhtml";><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Transparency Test</title>
<style type="text/css">
/*<![CDATA[*/
body { background: rgba(220, 220, 0, .5); }
/*]]>*/
</style>
</head>
<body>
<p>
Text on a yellowish, semi-transparent background.
</p>
</body></html>
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