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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_ArrayDispatchers
#define OSG_ArrayDispatchers 1
#include <osg/ref_ptr>
#include <osg/Array>
#include <osg/Matrixd>
namespace osg {
// forward declare
class State;
class AttributeDispatchMap;
struct AttributeDispatch : public osg::Referenced
{
virtual void assign(const GLvoid*) {}
virtual void operator() (unsigned int) {};
};
/** Helper class for managing the dispatch to OpenGL of various attribute arrays such as stored in osg::Geometry.*/
class OSG_EXPORT ArrayDispatchers : public osg::Referenced
{
public:
ArrayDispatchers();
~ArrayDispatchers();
void setState(osg::State* state);
void reset();
void setUseVertexAttribAlias(bool flag) { _useVertexAttribAlias = flag; }
bool getUseVertexAttribAlias() const { return _useVertexAttribAlias; }
void activate(unsigned int binding, AttributeDispatch* at)
{
if (at) _activeDispatchList[binding].push_back(at);
}
void activateVertexArray(osg::Array* array) { if (array && array->getBinding()>osg::Array::BIND_OFF) activate(array->getBinding(), vertexDispatcher(array)); }
void activateColorArray(osg::Array* array) { if (array && array->getBinding()>osg::Array::BIND_OFF) activate(array->getBinding(), colorDispatcher(array)); }
void activateNormalArray(osg::Array* array) { if (array && array->getBinding()>osg::Array::BIND_OFF) activate(array->getBinding(), normalDispatcher(array)); }
void activateSecondaryColorArray(osg::Array* array) { if (array && array->getBinding()>osg::Array::BIND_OFF) activate(array->getBinding(), secondaryColorDispatcher(array)); }
void activateFogCoordArray(osg::Array* array) { if (array && array->getBinding()>osg::Array::BIND_OFF) activate(array->getBinding(), fogCoordDispatcher(array)); }
void activateTexCoordArray(unsigned int unit, osg::Array* array) { if (array && array->getBinding()>osg::Array::BIND_OFF) activate(array->getBinding(), texCoordDispatcher(unit, array)); }
void activateVertexAttribArray(unsigned int unit, osg::Array* array) { if (array && array->getBinding()>osg::Array::BIND_OFF) activate(array->getBinding(), vertexAttribDispatcher(unit, array)); }
AttributeDispatch* vertexDispatcher(Array* array);
AttributeDispatch* normalDispatcher(Array* array);
AttributeDispatch* colorDispatcher(Array* array);
AttributeDispatch* secondaryColorDispatcher(Array* array);
AttributeDispatch* fogCoordDispatcher(Array* array);
AttributeDispatch* texCoordDispatcher(unsigned int unit, Array* array);
AttributeDispatch* vertexAttribDispatcher(unsigned int unit, Array* array);
void dispatch(unsigned int binding, unsigned int index)
{
AttributeDispatchList& ad = _activeDispatchList[binding];
for(AttributeDispatchList::iterator itr = ad.begin();
itr != ad.end();
++itr)
{
(*(*itr))(index);
}
}
bool active(unsigned int binding) const { return !_activeDispatchList[binding].empty(); }
protected:
void init();
void assignTexCoordDispatchers(unsigned int unit);
void assignVertexAttribDispatchers(unsigned int unit);
bool _initialized;
State* _state;
AttributeDispatchMap* _vertexDispatchers;
AttributeDispatchMap* _normalDispatchers;
AttributeDispatchMap* _colorDispatchers;
AttributeDispatchMap* _secondaryColorDispatchers;
AttributeDispatchMap* _fogCoordDispatchers;
typedef std::vector<AttributeDispatchMap*> AttributeDispatchMapList;
AttributeDispatchMapList _texCoordDispatchers;
AttributeDispatchMapList _vertexAttribDispatchers;
typedef std::vector<AttributeDispatch*> AttributeDispatchList;
typedef std::vector<AttributeDispatchList> ActiveDispatchList;
ActiveDispatchList _activeDispatchList;
bool _useVertexAttribAlias;
};
}
#endif
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