public static Gdk.Pixbuf MakeTransparent(Gdk.Pixbuf icon, double opacity)
{
Gdk.Pixbuf result = icon.Copy();
result.Fill(0);
result = result.AddAlpha(true, 0, 0, 0);
icon.Composite(result, 0, 0, icon.Width, icon.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, (int)(256 * opacity));
return(result);
}
public static Gdk.Pixbuf FadeIcon(Gdk.Pixbuf source)
{
Gdk.Pixbuf result = source.Copy();
result.Fill(0);
result = result.AddAlpha(true, 0, 0, 0);
source.Composite(result, 0, 0, source.Width, source.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, 128);
return(result);
}
public override object ChangeOpacity(object backend, double opacity)
{
Gdk.Pixbuf image = (Gdk.Pixbuf)backend;
Gdk.Pixbuf result = image.Copy();
result.Fill(0);
result = result.AddAlpha(true, 0, 0, 0);
image.Composite(result, 0, 0, image.Width, image.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, (int)(255 * opacity));
return(result);
}
static DemoApplicationWindow()
{
// Register our custom toolbar icons, for themability
Gdk.Pixbuf pixbuf = Gdk.Pixbuf.LoadFromResource("gtk-logo-rgb.gif");
Gdk.Pixbuf transparent = pixbuf.AddAlpha(true, 0xff, 0xff, 0xff);
IconFactory factory = new IconFactory();
factory.Add("demo-gtk-logo", new IconSet(transparent));
factory.AddDefault();
StockManager.Add(new StockItem("demo-gtk-logo", "_GTK#", 0, 0, null));
}
public static Gdk.Pixbuf MakeTransparent(Gdk.Pixbuf icon, double opacity)
{
Gdk.Pixbuf result = icon.Copy();
result.Fill(0);
result = result.AddAlpha(true, 0, 0, 0);
icon.Composite(result, 0, 0, icon.Width, icon.Height, 0, 0, 1, 1, Gdk.InterpType.Bilinear, (int)(256 * opacity));
var icon2x = Get2xIconVariant(icon);
if (icon2x != null)
{
Set2xIconVariant(result, MakeTransparent(icon2x, opacity));
}
return(result);
}
