static unsafe string GetError(IntPtr error)
{
if (error == IntPtr.Zero)
{
return("Unknown error");
}
return(Utf8Buffer.StringFromPtr(((GError *)error)->message));
}
public static Pixbuf NewFromFile(string filename)
{
using (var ub = new Utf8Buffer(filename))
{
IntPtr err;
var rv = Native.GdkPixbufNewFromFile(ub, out err);
if (rv != IntPtr.Zero)
{
return(new Pixbuf(rv));
}
throw new GException(err);
}
}
public static IDisposable Connect <T>(GObject obj, string name, T handler)
{
var handle = GCHandle.Alloc(handler);
var ptr = Marshal.GetFunctionPointerForDelegate((Delegate)(object)handler);
using (var utf = new Utf8Buffer(name))
{
var id = Native.GSignalConnectObject(obj, utf, ptr, IntPtr.Zero, 0);
if (id == 0)
{
throw new ArgumentException("Unable to connect to signal " + name);
}
return(new ConnectedSignal(obj, handle, id));
}
}
public void Save(Stream outputStream)
{
IntPtr buffer, bufferLen, error;
using (var png = new Utf8Buffer("png"))
if (!Native.GdkPixbufSaveToBufferv(this, out buffer, out bufferLen, png,
IntPtr.Zero, IntPtr.Zero, out error))
{
throw new GException(error);
}
var data = new byte[bufferLen.ToInt32()];
Marshal.Copy(buffer, data, 0, bufferLen.ToInt32());
Native.GFree(buffer);
outputStream.Write(data, 0, data.Length);
}
