GtkGLArea is a library implementing an OpenGL widget for GTK+. It is derived from the GtkDrawingArea widget and adds a few functions. GtkGLArea is built on top of another part of the library, gdkgl, which is basically a wrapper around GLX functions. The widget library allows the calling program to render OpenGL output inside a GTK+ window. . This package contains header files and documentation for compiling and building GTK+ programs needing an OpenGL canvas.