root/OpenSceneGraph/trunk/include/osg/LineStipple @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2004 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSG_LINESTIPPLE
15#define OSG_LINESTIPPLE 1
16
17#include <osg/StateAttribute>
18
19#ifndef GL_LINE_STIPPLE
20    #define GL_LINE_STIPPLE 0x0B24
21#endif
22
23namespace osg {
24
25class OSG_EXPORT LineStipple : public StateAttribute
26{
27    public :
28
29        LineStipple();
30
31        LineStipple(GLint factor, GLushort pattern):
32            _factor(factor),
33            _pattern(pattern) {}
34
35        /** Copy constructor using CopyOp to manage deep vs shallow copy.*/
36        LineStipple(const LineStipple& lw,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
37          StateAttribute(lw,copyop),
38          _factor(lw._factor),
39          _pattern(lw._pattern) {}
40
41        META_StateAttribute(osg, LineStipple, LINESTIPPLE);
42
43        /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
44        virtual int compare(const StateAttribute& sa) const
45        {
46            // check if the types are equal and then create the rhs variable.
47            // used by the COMPARE_StateAttribute_Parameter macros below.
48            COMPARE_StateAttribute_Types(LineStipple,sa)
49
50            // compare each parameter in turn against the rhs.
51            COMPARE_StateAttribute_Parameter(_factor)
52            COMPARE_StateAttribute_Parameter(_pattern)
53
54            return 0; // passed all the above comparison macros, must be equal.
55        }
56
57        virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
58        {
59            usage.usesMode(GL_LINE_STIPPLE);
60            return true;
61        }
62
63        void setFactor(GLint factor);
64        inline GLint getFactor() const { return _factor; }
65
66        void setPattern(GLushort pattern);
67        inline GLushort getPattern() const { return _pattern; }
68
69        virtual void apply(State& state) const;
70
71
72    protected :
73
74        virtual ~LineStipple();
75
76        GLint           _factor;
77        GLushort        _pattern;
78
79};
80
81}
82
83#endif
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