120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_LOGICOP
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#define OSG_LOGICOP 1
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#include <osg/StateAttribute>
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#ifndef GL_VERSION_1_2
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/* Logic Ops */
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#define GL_LOGIC_OP 0x0BF1
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#define GL_INDEX_LOGIC_OP 0x0BF1
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#define GL_COLOR_LOGIC_OP 0x0BF2
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#define GL_LOGIC_OP_MODE 0x0BF0
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#define GL_CLEAR 0x1500
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#define GL_SET 0x150F
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#define GL_COPY 0x1503
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#define GL_COPY_INVERTED 0x150C
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#define GL_NOOP 0x1505
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#define GL_INVERT 0x150A
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#define GL_AND 0x1501
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#define GL_NAND 0x150E
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#define GL_OR 0x1507
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#define GL_NOR 0x1508
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#define GL_XOR 0x1506
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#define GL_EQUIV 0x1509
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#define GL_AND_REVERSE 0x1502
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#define GL_AND_INVERTED 0x1504
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#define GL_OR_REVERSE 0x150B
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#define GL_OR_INVERTED 0x150D
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#endif
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namespace osg {
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/** Encapsulates OpenGL LogicOp state. */
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class SG_EXPORT LogicOp : public StateAttribute
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{
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public :
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LogicOp();
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LogicOp(GLenum opcode);
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/** Copy constructor using CopyOp to manage deep vs shallow copy. */
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LogicOp(const LogicOp& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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StateAttribute(trans,copyop),
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_opcode(trans._opcode){}
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META_StateAttribute(osg, LogicOp,LOGICOP);
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/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
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virtual int compare(const StateAttribute& sa) const
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{
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// Check for equal types, then create the rhs variable
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// used by the COMPARE_StateAttribute_Paramter macros below.
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COMPARE_StateAttribute_Types(LogicOp,sa)
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// Compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_opcode)
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return 0; // Passed all the above comparison macros, so must be equal.
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}
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virtual bool getModeUsage(ModeUsage& usage) const
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{
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usage.usesMode(GL_COLOR_LOGIC_OP);
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return true;
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}
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enum LogicOpOpcode {
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CLEAR = GL_CLEAR,
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SET = GL_SET,
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COPY = GL_COPY,
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COPY_INVERTED = GL_COPY_INVERTED,
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NOOP = GL_NOOP,
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INVERT = GL_INVERT,
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AND = GL_AND,
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NAND = GL_NAND,
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OR = GL_OR,
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NOR = GL_NOR,
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XOR = GL_XOR,
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EQUIV = GL_EQUIV,
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AND_REVERSE = GL_AND_REVERSE,
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AND_INVERTED = GL_AND_INVERTED,
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OR_REVERSE = GL_OR_REVERSE,
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OR_INVERTED = GL_OR_INVERTED
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};
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inline void setOpcode( GLenum opcode )
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{
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_opcode = opcode;
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}
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inline GLenum getOpcode() const { return _opcode; }
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virtual void apply(State& state) const;
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protected :
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virtual ~LogicOp();
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GLenum _opcode;
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};
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}
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#endif
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