buffercache.hpp

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#ifndef COMPONENTS_TERRAIN_BUFFERCACHE_H
#define COMPONENTS_TERRAIN_BUFFERCACHE_H

#include <osg/ref_ptr>
#include <osg/Array>
#include <osg/PrimitiveSet>

#include <map>

namespace Terrain
{

    class BufferCache
    {
    public:
        osg::ref_ptr<osg::DrawElements> getIndexBuffer (unsigned int numVerts, unsigned int flags);

        osg::ref_ptr<osg::Vec2Array> getUVBuffer(unsigned int numVerts);

        void clearCache();

        void releaseGLObjects(osg::State* state);

    private:
        // Index buffers are shared across terrain batches where possible. There is one index buffer for each
        // combination of LOD deltas and index buffer LOD we may need.
        std::map<std::pair<int, int>, osg::ref_ptr<osg::DrawElements> > mIndexBufferMap;
        OpenThreads::Mutex mIndexBufferMutex;

        std::map<int, osg::ref_ptr<osg::Vec2Array> > mUvBufferMap;
        OpenThreads::Mutex mUvBufferMutex;
    };

}

#endif