OpenSceneGraph 3.6.5
BlendEquation
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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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_BLENDEQUATION
15#define OSG_BLENDEQUATION 1
16
17#include <osg/StateAttribute>
18
19#ifndef GL_VERSION_1_2
20/* Logic Ops */
21#define GL_MIN 0x8007
22#define GL_MAX 0x8008
23#define GL_FUNC_ADD 0x8006
24#define GL_FUNC_SUBTRACT 0x800A
25#define GL_FUNC_REVERSE_SUBTRACT 0x800B
26#endif
27
28#ifndef GL_LOGIC_OP
29#define GL_LOGIC_OP 0x0BF1
30#endif
31
32#ifndef GL_ALPHA_MIN_SGIX
33#define GL_ALPHA_MIN_SGIX 0x8320
34#define GL_ALPHA_MAX_SGIX 0x8321
35#endif
36
37namespace osg {
38
41{
42 public :
43
54
56
58
59 BlendEquation(Equation equationRGB, Equation equationAlpha);
60
66
68
70 virtual int compare(const StateAttribute& sa) const
71 {
72 // Check for equal types, then create the rhs variable
73 // used by the COMPARE_StateAttribute_Parameter macros below.
75
76 // Compare each parameter in turn against the rhs.
79
80 return 0; // Passed all the above comparison macros, so must be equal.
81 }
82
83 virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
84 {
85 usage.usesMode(GL_BLEND);
86 return true;
87 }
88
89
90 inline void setEquation(Equation equation) { _equationRGB = _equationAlpha = equation; }
91 inline Equation getEquation() const { return _equationRGB; }
92
93 inline void setEquationRGB(Equation equation) { _equationRGB = equation; }
94 inline Equation getEquationRGB() const { return _equationRGB; }
95
96 inline void setEquationAlpha(Equation equation) { _equationAlpha = equation; }
97 inline Equation getEquationAlpha() const { return _equationAlpha; }
98
99 virtual void apply(State& state) const;
100
101protected :
102
103 virtual ~BlendEquation();
104
105
107};
108
109}
110
111#endif
#define GL_ALPHA_MAX_SGIX
Definition BlendEquation:34
#define GL_ALPHA_MIN_SGIX
Definition BlendEquation:33
#define GL_LOGIC_OP
Definition BlendEquation:29
#define GL_FUNC_REVERSE_SUBTRACT
Definition BlendEquation:25
#define GL_MIN
Definition BlendEquation:21
#define GL_FUNC_SUBTRACT
Definition BlendEquation:24
#define GL_MAX
Definition BlendEquation:22
#define GL_FUNC_ADD
Definition BlendEquation:23
#define COMPARE_StateAttribute_Parameter(parameter)
COMPARE_StateAttribute_Parameter macro is a helper for implementing the StatateAtribute::compare(....
Definition StateAttribute:69
#define COMPARE_StateAttribute_Types(TYPE, rhs_attribute)
COMPARE_StateAttribute_Types macro is a helper for implementing the StateAtribute::compare(....
Definition StateAttribute:57
The core osg library provides the basic scene graph classes such as Nodes, State and Drawables,...
Definition AlphaFunc:19
virtual bool getModeUsage(StateAttribute::ModeUsage &usage) const
Return the modes associated with this StateAttribute.
Definition BlendEquation:83
Equation getEquationRGB() const
Definition BlendEquation:94
META_StateAttribute(osg, BlendEquation, BLENDEQUATION)
void setEquation(Equation equation)
Definition BlendEquation:90
void setEquationAlpha(Equation equation)
Definition BlendEquation:96
Equation getEquationAlpha() const
Definition BlendEquation:97
BlendEquation(const BlendEquation &trans, const CopyOp &copyop=CopyOp::SHALLOW_COPY)
Copy constructor using CopyOp to manage deep vs shallow copy.
Definition BlendEquation:62
BlendEquation(Equation equation)
BlendEquation(Equation equationRGB, Equation equationAlpha)
void setEquationRGB(Equation equation)
Definition BlendEquation:93
virtual int compare(const StateAttribute &sa) const
Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.
Definition BlendEquation:70
Equation _equationAlpha
Definition BlendEquation:106
Equation
Definition BlendEquation:44
@ FUNC_REVERSE_SUBTRACT
Definition BlendEquation:52
@ RGBA_MIN
Definition BlendEquation:45
@ LOGIC_OP
Definition BlendEquation:49
@ ALPHA_MIN
Definition BlendEquation:47
@ FUNC_ADD
Definition BlendEquation:50
@ ALPHA_MAX
Definition BlendEquation:48
@ RGBA_MAX
Definition BlendEquation:46
@ FUNC_SUBTRACT
Definition BlendEquation:51
virtual ~BlendEquation()
Equation _equationRGB
Definition BlendEquation:106
virtual void apply(State &state) const
apply the OpenGL state attributes.
Equation getEquation() const
Definition BlendEquation:91
Copy Op(erator) used to control whether shallow or deep copy is used during copy construction and clo...
Definition CopyOp:41
@ SHALLOW_COPY
Definition CopyOp:47
Encapsulates the current applied OpenGL modes, attributes and vertex arrays settings,...
Definition State:80
@ BLENDEQUATION
Definition StateAttribute:150
Definition StateAttribute:308
virtual void usesMode(GLMode mode)=0
#define OSG_EXPORT
Definition Export:39

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