PolygonMode

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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * OpenSceneGraph Public License for more details.
*/
 
#ifndef OSG_POLYGONMODE
#define OSG_POLYGONMODE 1
 
#include <osg/StateAttribute>
#include <osg/GL>
 
#if defined(OSG_GLES1_AVAILABLE) || defined(OSG_GLES2_AVAILABLE) || defined(OSG_GLES3_AVAILABLE)
    #define GL_POINT    0x1B00
    #define GL_LINE     0x1B01
    #define GL_FILL     0x1B02
#endif
 
namespace osg {

class OSG_EXPORT PolygonMode : public StateAttribute
{
    public :
 
        enum Mode {
            POINT = GL_POINT,
            LINE = GL_LINE,
            FILL = GL_FILL
        };
 
        enum Face {
            FRONT_AND_BACK,
            FRONT,
            BACK
        };
 
        PolygonMode();
 
        PolygonMode(Face face,Mode mode);

        PolygonMode(const PolygonMode& pm,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
            StateAttribute(pm,copyop),
            _modeFront(pm._modeFront),
            _modeBack(pm._modeBack) {}
 
        META_StateAttribute(osg, PolygonMode, POLYGONMODE);

        virtual int compare(const StateAttribute& sa) const
        {
            // check the types are equal and then create the rhs variable
            // used by the COMPARE_StateAttribute_Parameter macros below.
            COMPARE_StateAttribute_Types(PolygonMode,sa)
 
            // compare each parameter in turn against the rhs.
            COMPARE_StateAttribute_Parameter(_modeFront)
            COMPARE_StateAttribute_Parameter(_modeBack)
 
            return 0; // passed all the above comparison macros, must be equal.
        }
 
        void setMode(Face face,Mode mode);
        Mode getMode(Face face) const;
 
        inline bool getFrontAndBack() const { return _modeFront==_modeBack; }
 
        virtual void apply(State& state) const;
 
    protected:
 
        virtual ~PolygonMode();
 
        Mode _modeFront;
        Mode _modeBack;
 
};
 
}
 
#endif