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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2013 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef OSGEARTH_FEATURES_OPTIMIZER_HINTS_H
#define OSGEARTH_FEATURES_OPTIMIZER_HINTS_H 1

#include <osgEarthFeatures/Common>
#include <osgUtil/Optimizer>

namespace osgEarth { namespace Features
{
    /**
     * A collection of hints that tells the osgUtil::Optimizer to expressly include or 
     * exclude certain optimization options.
     *
     * Filters that do their own optimization may wish to instruct the general OSG
     * optimizer to include or exclude certain optimization techniques. The FilterContext
     * carries an OptimizerHints object that can be used for this purpose.
     */
    class OSGEARTHFEATURES_EXPORT OptimizerHints
    {
    public:
        /**
         * Constructs a empty hints object.
         */
        OptimizerHints();
        
        /**
         * Copy constructor.
         */
        OptimizerHints( const OptimizerHints& rhs );

        virtual ~OptimizerHints() { }

        /**
         * Adds optimizer options that the general optimizer should use.
         */
        void include( osgUtil::Optimizer::OptimizationOptions options );

        /**
         * Adds optimizer options that the general optimizer should NOT use.
         */
        void exclude( osgUtil::Optimizer::OptimizationOptions options );

        /**
         * Gets the mask of options that the optimzer should expressly include.
         */
        osgUtil::Optimizer::OptimizationOptions getIncludedOptions() const;

        /**
         * Gets the mask of options that the optimizer should expressly exclude.
         */
        osgUtil::Optimizer::OptimizationOptions getExcludedOptions() const;

    private:
        int included;
        int excluded;
    };

} }

#endif // OSGEARTH_FEATURES_OPTIMIZER_HINTS_H