GstGLWindowCocoa
GstGLWindowCocoa * gst_gl_window_cocoa_new (void);
void
gboolean gst_gl_window_cocoa_create_window (GstGLWindowCocoa *window_cocoa, NSRect rect);
GstGLWindowCocoa *window_cocoa
NSRect rect
struct GstGLWindowCocoa { };
struct GstGLWindowCocoaClass { };