GtkSharp/gdk/Pixbuf.custom
Vladimir Vukicevic 58f6f01d45 * glib/Object.cs: add needs_ref boolean that controls whether
we need to ref this object once we have a pointer to it or not.
By default this is set to true -- constructors and other functions
where we do own the object need to set this to false before setting
the "Raw" property.  Also added Unref and RefCount methods.

* glue/object.c, glue/type.c: some utility functions for
refcounting support

* gdk/Pixbuf.custom: manually wrap a few functions so that
the refcount ends up being correct at the end (need an extra Unref)

* api/gdk-api.xml, sources/Gdk.metadata: metadata updates for
hiding manually-wrapped Pixbuf stuff

svn path=/trunk/gtk-sharp/; revision=8913
2002-11-10 10:09:05 +00:00

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IntPtr LoadFromStream (System.IO.Stream input)
{
PixbufLoader loader = new PixbufLoader ();
byte [] buffer = new byte [8192];
int n;
while ((n = input.Read (buffer, 0, 8192)) != 0)
loader.Write (buffer, (uint) n);
loader.Close ();
return loader.Pixbuf.Handle;
}
public Pixbuf (System.IO.Stream input)
{
Raw = LoadFromStream (input);
}
public Pixbuf (System.Reflection.Assembly assembly, string resource)
{
if (assembly == null)
assembly = System.Reflection.Assembly.GetCallingAssembly ();
System.IO.Stream s;
Pixbuf p = null;
using (s = assembly.GetManifestResourceStream (resource))
Raw = LoadFromStream (s);
}
// scale_simple, composite_color_simple, and addalpha do a gdk_pixbuf_new on the
// return first, and we also ref it
// in the GetObject. So get rid of one extra reference.
[DllImport("gdk_pixbuf-2.0")]
static extern IntPtr gdk_pixbuf_scale_simple(IntPtr raw, int dest_width, int dest_height, int interp_type);
public Gdk.Pixbuf ScaleSimple(int dest_width, int dest_height, Gdk.InterpType interp_type) {
IntPtr raw_ret = gdk_pixbuf_scale_simple(Handle, dest_width, dest_height, (int) interp_type);
Gdk.Pixbuf ret = (Gdk.Pixbuf) GLib.Object.GetObject(raw_ret);
ret.Unref ();
return ret;
}
[DllImport("gdk_pixbuf-2.0")]
static extern IntPtr gdk_pixbuf_composite_color_simple(IntPtr raw, int dest_width, int dest_height, int interp_type, int overall_alpha, int check_size, uint color1, uint color2);
public Gdk.Pixbuf CompositeColorSimple(int dest_width, int dest_height, Gdk.InterpType interp_type, int overall_alpha, int check_size, uint color1, uint color2) {
IntPtr raw_ret = gdk_pixbuf_composite_color_simple(Handle, dest_width, dest_height, (int) interp_type, overall_alpha, check_size, color1, color2);
Gdk.Pixbuf ret = (Gdk.Pixbuf) GLib.Object.GetObject(raw_ret);
ret.Unref ();
return ret;
}
[DllImport("gdk_pixbuf-2.0")]
static extern IntPtr gdk_pixbuf_add_alpha(IntPtr raw, bool substitute_color, byte r, byte g, byte b);
public Gdk.Pixbuf AddAlpha(bool substitute_color, byte r, byte g, byte b) {
IntPtr raw_ret = gdk_pixbuf_add_alpha(Handle, substitute_color, r, g, b);
Gdk.Pixbuf ret = (Gdk.Pixbuf) GLib.Object.GetObject(raw_ret);
ret.Unref ();
return ret;
}