79 lines
2.3 KiB
C++
79 lines
2.3 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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//osgFX - Copyright (C) 2003 Marco Jez
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#ifndef OSGFX_VALIDATOR_
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#define OSGFX_VALIDATOR_
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#include <osgFX/Effect>
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#include <osg/ref_ptr>
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#include <osg/StateAttribute>
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#include <vector>
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namespace osgFX
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{
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/**
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This class is used internally by osgFX::Effect to choose between different
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techniques dynamically. The apply() method will call each technique's
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validate() method and store the results in a buffered array. The Effect
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class will then choose the first technique that could be validated in all
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active rendering contexts.
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*/
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class OSGFX_EXPORT Validator: public osg::StateAttribute {
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public:
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enum {
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VALIDATOR = 0x56616C69
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};
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Validator();
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Validator(Effect *effect);
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Validator(const Validator ©, const osg::CopyOp ©op = osg::CopyOp::SHALLOW_COPY);
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META_StateAttribute(osgFX, Validator, VALIDATOR);
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void apply(osg::State &state) const;
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void compile(osg::State &state) const;
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inline int compare(const osg::StateAttribute &sa) const;
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inline void disable() { effect_ = 0; }
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protected:
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virtual ~Validator() {}
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Validator &operator=(const Validator &) { return *this; }
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private:
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mutable Effect *effect_;
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};
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// INLINE METHODS
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inline int Validator::compare(const osg::StateAttribute &sa) const
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{
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// check the types are equal and then create the rhs variable
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//used by the COMPARE_StateAttribute_Paramter macro's below.
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COMPARE_StateAttribute_Types(Validator,sa)
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// compare parameters
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COMPARE_StateAttribute_Parameter(effect_)
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return 0;
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}
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}
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#endif
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