openscenegraph
BlendEquationi
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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2014 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_BLENDEQUATIONI
15#define OSG_BLENDEQUATIONI 1
16
17#include <osg/BlendEquation>
18
19namespace osg {
20
21/** Encapsulates glBlendEquationi function : the index version of glBlendEquation for multiple render target.
22*/
23class OSG_EXPORT BlendEquationi : public BlendEquation
24{
25 public :
26
27 BlendEquationi();
28
29 BlendEquationi(unsigned int buf, Equation equation):
30 BlendEquation(equation),
31 _index(buf) {}
32
33 BlendEquationi(unsigned int buf, Equation equationRGB, Equation equationAlpha):
34 BlendEquation(equationRGB, equationAlpha),
35 _index(buf) {}
36
37
38 /** Copy constructor using CopyOp to manage deep vs shallow copy. */
39 BlendEquationi(const BlendEquationi& cm,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
40 BlendEquation(cm,copyop),
41 _index(cm._index) {}
42
43 META_StateAttribute(osg, BlendEquationi, BLENDEQUATION);
44
45 /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
46 virtual int compare(const StateAttribute& sa) const
47 {
48 // Check for equal types, then create the rhs variable
49 // used by the COMPARE_StateAttribute_Parameter macros below.
50 COMPARE_StateAttribute_Types(BlendEquationi,sa)
51
52 COMPARE_StateAttribute_Parameter(_index);
53
54 return BlendEquation::compare(sa);
55 }
56
57 /** Return the buffer index as the member identifier.*/
58 virtual unsigned int getMember() const { return _index; }
59
60 /** Set the renderbuffer index of the BlendEquationi. */
61 void setIndex(unsigned int buf);
62
63 /** Get the renderbuffer index of the BlendEquationi. */
64 unsigned int getIndex() const { return _index; }
65
66 virtual void apply(State& state) const;
67
68 protected:
69
70 virtual ~BlendEquationi();
71
72 unsigned int _index;
73
74};
75
76}
77
78#endif