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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2008-2010 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_CAPABILITIES_H
#define OSGEARTH_CAPABILITIES_H 1

#include <osgEarth/Common>

namespace osgEarth
{
    class OSGEARTH_EXPORT Capabilities : public osg::Referenced
    {
    public:
        int getMaxFFPTextureUnits() const { return _maxFFPTextureUnits; }

        int getMaxGPUTextureUnits() const { return _maxGPUTextureUnits; }

        int getMaxGPUTextureCoordSets() const { return _maxGPUTextureCoordSets; }

        int getMaxTextureSize() const { return _maxTextureSize; }

        int getMaxFastTextureSize() const { return _maxFastTextureSize; }

        int getMaxLights() const { return _maxLights; }

        bool supportsGLSL(float minimumVersion =1.0f) const { 
            return _supportsGLSL && _GLSLversion >= minimumVersion; }

        float getGLSLVersion() const { return _GLSLversion; }

        bool supportsTextureArrays() const { return _supportsTextureArrays; }

        bool supportsTexture3D() const { return _supportsTexture3D; }

        bool supportsMultiTexture() const { return _supportsMultiTexture; }

        bool supportsStencilWrap() const { return _supportsStencilWrap; }

        bool supportsTwoSidedStencil() const { return _supportsTwoSidedStencil; }

        bool supportsTexture2DLod() const { return _supportsTexture2DLod; }

        bool supportsMipmappedTextureUpdates() const { return _supportsMipmappedTextureUpdates; }

    private:
        Capabilities();

    private:
        int  _maxFFPTextureUnits;
        int  _maxGPUTextureUnits;
        int  _maxGPUTextureCoordSets;
        int  _maxTextureSize;
        int  _maxFastTextureSize;
        int  _maxLights;
        bool _supportsGLSL;
        float _GLSLversion;
        bool _supportsTextureArrays;
        bool _supportsTexture3D;
        bool _supportsMultiTexture;
        bool _supportsStencilWrap;
        bool _supportsTwoSidedStencil;
        bool _supportsTexture2DLod;
        bool _supportsMipmappedTextureUpdates;
        std::string _vendor;
        std::string _renderer;
        std::string _version;

    public:
        friend class Registry;
    };
}

#endif // OSGEARTH_CAPABILITIES_H