1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/* -*-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_Scissor
#define OSG_Scissor 1
#include <osg/StateAttribute>
namespace osg {
/** Encapsulate OpenGL glScissor. */
class OSG_EXPORT Scissor : public StateAttribute
{
public :
Scissor();
Scissor(int x,int y,int width,int height):
_x(x),
_y(y),
_width(width),
_height(height) {}
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
Scissor(const Scissor& vp,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(vp,copyop),
_x(vp._x),
_y(vp._y),
_width(vp._width),
_height(vp._height) {}
META_StateAttribute(osg, Scissor, SCISSOR);
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
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(Scissor,sa)
// compare each parameter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_x)
COMPARE_StateAttribute_Parameter(_y)
COMPARE_StateAttribute_Parameter(_width)
COMPARE_StateAttribute_Parameter(_height)
return 0; // passed all the above comparison macros, must be equal.
}
virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
{
usage.usesMode(GL_SCISSOR_TEST);
return true;
}
inline void setScissor(int x,int y,int width,int height)
{
_x = x;
_y = y;
_width = width;
_height = height;
}
void getScissor(int& x,int& y,int& width,int& height) const
{
x = _x;
y = _y;
width = _width;
height = _height;
}
inline int& x() { return _x; }
inline int x() const { return _x; }
inline int& y() { return _y; }
inline int y() const { return _y; }
inline int& width() { return _width; }
inline int width() const { return _width; }
inline int& height() { return _height; }
inline int height() const { return _height; }
virtual void apply(State& state) const;
protected:
virtual ~Scissor();
int _x;
int _y;
int _width;
int _height;
};
}
#endif
|
