/*

-----------------------------------------------------------------------------

This source file is part of OGRE

(Object-oriented Graphics Rendering Engine)

For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2013 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

-----------------------------------------------------------------------------

*/

#ifndef __OgreASTCCodec_H__

#define __OgreASTCCodec_H__

#include "OgreImageCodec.h"

namespace Ogre {

  /** \addtogroup Core

  *  @{

  */

  /** \addtogroup Image

  *  @{

  */

    /** Codec specialized in loading ASTC (ARM Adaptive Scalable Texture Compression) images.

    We implement our own codec here since we need to be able to keep ASTC

    data compressed if the card supports it.

    */

    class ASTCCodec : public ImageCodec

    {

    private:

        String mType;

    /// Single registered codec instance

        static ASTCCodec* msInstance;

  public:

        ASTCCodec();

        virtual ~ASTCCodec() { }

        void decode(const DataStreamPtr& input, const Any& output) const override;

    String magicNumberToFileExt(const char *magicNumberPtr, size_t maxbytes) const override;

        String getType() const override;

    /// Static method to startup and register the ASTC codec

    static void startup(void);

    /// Static method to shutdown and unregister the ASTC codec

    static void shutdown(void);

    private:

        void getClosestBlockDim2d(float targetBitrate, int *x, int *y) const;

        static void getClosestBlockDim3d(float targetBitrate, int *x, int *y, int *z);

        static float getBitrateForPixelFormat(PixelFormat fmt);

    };

  /** @} */

  /** @} */

} // namespace

#endif