--- /dev/null
+#ifndef MSP_GLTK_GEOMETRY_H_
+#define MSP_GLTK_GEOMETRY_H_
+
+namespace Msp {
+namespace GLtk {
+
+/**
+Specifies the position and size of a widget or graphic.
+*/
+struct Geometry
+{
+ int x, y;
+ unsigned w, h;
+
+ Geometry(): x(0), y(0), w(1), h(1) { }
+ Geometry(int x_, int y_, unsigned w_, unsigned h_): x(x_), y(y_), w(w_), h(h_) { }
+};
+
+} // namespace GLtk
+} // namespace Msp
+
+#endif