/* -*-c++-*- */
/* osgEarth - Geospatial SDK for OpenSceneGraph
 * Copyright 2020 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 OSGEARTHSYMBOLOGY_GEOMETRY_RASTERIZER_H
#define OSGEARTHSYMBOLOGY_GEOMETRY_RASTERIZER_H 1

#include <osgEarth/Common>
#include <osgEarth/Geometry>
#include <osgEarth/Style>
#include <osg/Image>

namespace osgEarth
{
    /**
     * Draws geometry onto an Image canvas using software path-rendering.
     */
    class OSGEARTH_EXPORT GeometryRasterizer
    {
    public:
        GeometryRasterizer( int width, int height, const Style& style =Style() );

        GeometryRasterizer( osg::Image* image, const Style& style =Style() );

        /** dtor */
        virtual ~GeometryRasterizer();

        /** draws the geometry to the image. */
        void draw( const Geometry* geom, const osg::Vec4f& color =osg::Vec4f(1,1,1,1) );

        /** finishes the image and returns it. calls to draw() after this will have no effect. */
        osg::Image* finalize();

    private:
        osg::ref_ptr<osg::Image>      _image;
        Style                         _style;
        osg::ref_ptr<osg::Referenced> _state;
    };
} // namespace osgEarth

#endif // OSGEARTHSYMBOLOGY_GEOMETRY_RASTERIZER_H