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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_LOGICOP
#define OSG_LOGICOP 1
#include <osg/StateAttribute>
#ifndef OSG_GL_FIXED_FUNCTION_AVAILABLE
#define GL_CLEAR 0x1500
#define GL_SET 0x150F
#define GL_COPY 0x1503
#define GL_COPY_INVERTED 0x150C
#define GL_NOOP 0x1505
#define GL_AND 0x1501
#define GL_NAND 0x150E
#define GL_OR 0x1507
#define GL_NOR 0x1508
#define GL_XOR 0x1506
#define GL_EQUIV 0x1509
#define GL_AND_REVERSE 0x1502
#define GL_AND_INVERTED 0x1504
#define GL_OR_REVERSE 0x150B
#define GL_OR_INVERTED 0x150D
#define GL_COLOR_LOGIC_OP 0x0BF2
#endif
namespace osg {
/** Encapsulates OpenGL LogicOp state. */
class OSG_EXPORT LogicOp : public StateAttribute
{
public :
enum Opcode {
CLEAR = GL_CLEAR,
SET = GL_SET,
COPY = GL_COPY,
COPY_INVERTED = GL_COPY_INVERTED,
NOOP = GL_NOOP,
INVERT = GL_INVERT,
AND = GL_AND,
NAND = GL_NAND,
OR = GL_OR,
NOR = GL_NOR,
XOR = GL_XOR,
EQUIV = GL_EQUIV,
AND_REVERSE = GL_AND_REVERSE,
AND_INVERTED = GL_AND_INVERTED,
OR_REVERSE = GL_OR_REVERSE,
OR_INVERTED = GL_OR_INVERTED
};
LogicOp();
LogicOp(Opcode opcode);
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
LogicOp(const LogicOp& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(trans,copyop),
_opcode(trans._opcode){}
META_StateAttribute(osg, LogicOp,LOGICOP);
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
virtual int compare(const StateAttribute& sa) const
{
// Check for equal types, then create the rhs variable
// used by the COMPARE_StateAttribute_Parameter macros below.
COMPARE_StateAttribute_Types(LogicOp,sa)
// Compare each parameter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_opcode)
return 0; // Passed all the above comparison macros, so must be equal.
}
virtual bool getModeUsage(StateAttribute::ModeUsage& usage) const
{
usage.usesMode(GL_COLOR_LOGIC_OP);
return true;
}
inline void setOpcode(Opcode opcode)
{
_opcode = opcode;
}
inline Opcode getOpcode() const { return _opcode; }
virtual void apply(State& state) const;
protected :
virtual ~LogicOp();
Opcode _opcode;
};
}
#endif
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