/* -*-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 OSGEARTH_MAPBOXGL_GLYPH_MANAGER
#define OSGEARTH_MAPBOXGL_GLYPH_MANAGER 1

#include <osgEarth/Common>
#include <osgEarth/URI>
#include <osgDB/Options>
#include <map>

namespace osgEarth { namespace Util
{
    class OSGEARTH_EXPORT MapboxGLGlyphManager : public osg::Referenced
    {        
    public:
        class Glyph : public osg::Referenced
        {
        public:
            unsigned int id;
            unsigned int width;
            unsigned int height;
            int left;
            int top;
            unsigned int advance;
            std::string bitmap;
        };

        MapboxGLGlyphManager(const std::string& uri, const std::string& key, const osgDB::Options* readOptions);

        const std::string& getURI() const;
        void setURI(const std::string& uri);

        const std::string& getKey() const;
        void setKey(const std::string& key);

        void getGlyphs(const std::string& text, const std::string& fontStack, std::vector< osg::ref_ptr< Glyph > >& result);

    private:

        //mapboxgl::glyphs::glyph getGlyph(const std::string& font, unsigned int code);
        Glyph* getGlyph(const std::string& font, unsigned int code);

        void loadFont(const osgEarth::URI& glyphsURI);

        std::mutex _mutex;
        std::map< std::string, std::map< unsigned int, osg::ref_ptr< Glyph > > > _fontsToGlyphs;
        std::string _uri;
        std::string _key;
        osg::ref_ptr< const osgDB::Options > _options;

        std::set< std::string > _loadedFonts;
    };
} }

#endif // OSGEARTH_MAPBOXGL_GLYPH_MANAGER