File src/OFColor+Cube.h from the latest check-in
#import <ObjFW/ObjFW.h> @interface OFColor (Cube) - (void)cube_setAsGLColor; - (void)cube_setAsGLClearColor; - (void)cube_setAsGLFogColor; @end
#import <ObjFW/ObjFW.h> @interface OFColor (Cube) - (void)cube_setAsGLColor; - (void)cube_setAsGLClearColor; - (void)cube_setAsGLFogColor; @end