117 lines
4.1 KiB
C++
117 lines
4.1 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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_ATTRIBUTEDISPATCHERS
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#define OSG_ATTRIBUTEDISPATCHERS 1
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#include <osg/ref_ptr>
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#include <osg/Array>
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#include <osg/Matrixd>
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namespace osg {
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// forward declare
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class State;
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class AttributeDispatchMap;
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struct AttributeDispatch : public osg::Referenced
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{
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virtual void assign(const GLvoid*) {}
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virtual void operator() (unsigned int) {};
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};
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/** Helper class for managing the dispatch to OpenGL of various attribute arrays such as stored in osg::Geometry.*/
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class OSG_EXPORT AttributeDispatchers : public osg::Referenced
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{
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public:
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AttributeDispatchers();
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~AttributeDispatchers();
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void setState(osg::State* state);
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void reset();
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void setUseVertexAttribAlias(bool flag) { _useVertexAttribAlias = flag; }
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bool getUseVertexAttribAlias() const { return _useVertexAttribAlias; }
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#define DISPATCH_OR_ACTIVATE(array, dispatcher) \
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if (array) { \
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unsigned int binding = array->getBinding(); \
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if (binding==osg::Array::BIND_OVERALL) \
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{ \
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AttributeDispatch* at = dispatcher; \
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if (at) (*at)(0); \
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} \
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else if (binding==osg::Array:: BIND_PER_PRIMITIVE_SET) \
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{ \
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AttributeDispatch* at = dispatcher; \
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if (at) _activeDispatchList.push_back(at); \
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} \
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}
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void activateColorArray(osg::Array* array) { DISPATCH_OR_ACTIVATE(array, colorDispatcher(array)); }
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void activateNormalArray(osg::Array* array) { DISPATCH_OR_ACTIVATE(array, normalDispatcher(array)); }
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void activateSecondaryColorArray(osg::Array* array) { DISPATCH_OR_ACTIVATE(array, secondaryColorDispatcher(array)); }
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void activateFogCoordArray(osg::Array* array) { DISPATCH_OR_ACTIVATE(array, fogCoordDispatcher(array)); }
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void activateVertexAttribArray(unsigned int unit, osg::Array* array) { DISPATCH_OR_ACTIVATE(array, vertexAttribDispatcher(unit , array)); }
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AttributeDispatch* normalDispatcher(Array* array);
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AttributeDispatch* colorDispatcher(Array* array);
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AttributeDispatch* secondaryColorDispatcher(Array* array);
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AttributeDispatch* fogCoordDispatcher(Array* array);
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AttributeDispatch* vertexAttribDispatcher(unsigned int unit, Array* array);
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void dispatch(unsigned int index)
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{
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for(AttributeDispatchList::iterator itr = _activeDispatchList.begin();
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itr != _activeDispatchList.end();
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++itr)
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{
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(*(*itr))(index);
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}
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}
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bool active() const { return !_activeDispatchList.empty(); }
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protected:
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void init();
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void assignTexCoordDispatchers(unsigned int unit);
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void assignVertexAttribDispatchers(unsigned int unit);
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bool _initialized;
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State* _state;
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AttributeDispatchMap* _normalDispatchers;
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AttributeDispatchMap* _colorDispatchers;
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AttributeDispatchMap* _secondaryColorDispatchers;
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AttributeDispatchMap* _fogCoordDispatchers;
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typedef std::vector<AttributeDispatchMap*> AttributeDispatchMapList;
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AttributeDispatchMapList _vertexAttribDispatchers;
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typedef std::vector<AttributeDispatch*> AttributeDispatchList;
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AttributeDispatchList _activeDispatchList;
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bool _useVertexAttribAlias;
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};
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}
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#endif
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