Hello, I am trying to port the Cocoa OpenGL sample to MacRuby and encountered a few problems. First, I can't access some constants defined in an enum in GLTypes.h. Do I need to port those constants to ruby by hand ? Is that related to gen_bridge_metadata ? Second, I need to use CGLQueryRendererInfo and CGLDescribeRenderer functions. The first one requires a pointer to a CGLRendererInfoObj structure but the second requires the object to be passed directly. I tried some C style pointer arithmetic : info = Pointer.new_with_type("CGLRendererInfoObj") count = Pointer.new_with_type("l") CGLQueryRendererInfo(caps[:cgl_display_mask], info, count) <- works fine, but CGLRendererInfoObj is opaque so I can't check it in irb. CGLDescribeRenderer(info[0], 0, kCGLRPRendererCount, count) <- I naively tried to dereference the pointer, but it doesn't work. CGLDescribeRenderer(info, 0, kCGLRPRendererCount, count) <- No complaints, but the value for count[0] is not consistent (100468704 renderers). I see in MacIRB that there is a CGLRendererInfoObj class but I can't instantiate it. This is all new to me and I may be overlooking something obvious. If anyone has an idea, please help. Thanks, Julien Jassaud