sharpenmodifier.h

// © Copyright 2010 - 2016 BlackTopp Studios Inc.
/* This file is part of The Mezzanine Engine.

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    GNU General Public License for more details.

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*/
/* The original authors have included a copy of the license specified above in the
   'Docs' folder. See 'gpl.txt'
*/
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/*
 -----------------------------------------------------------------------------
 This source file is part of ogre-procedural

 For the latest info, see http://code.google.com/p/ogre-procedural/

 Copyright (c) 2010-2013 Michael Broutin

 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
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 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
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 */
#ifndef _graphicsproceduralsharpenmodifier_h
#define _graphicsproceduralsharpenmodifier_h

#include "Graphics/Procedural/Texture/texturemodifier.h"

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            ///////////////////////////////////////////////////////////////////////////////
            /// @brief A modifier that will attempt to add detail to a texture.
            /// @details
            ///////////////////////////////////////
            class MEZZ_LIB SharpenModifier : public TextureModifier
            {
            public:
                /// @brief An enum used to describe the type of sharpening operation to be performed.
                enum SharpenType
                {
                    ST_Normal   = 0,  ///< Use a simple block filter to sharpen the image.
                    ST_Gaussian = 1   ///< Use a gaussian filter to sharpen the image.
                };
            protected:
                /// @internal
                /// @brief The type of Sharpening operation that will be performed.
                SharpenType Type;
                /// @internal
                /// @brief The size of the block of pixels around each pixel to be processed that will be sampled.
                UInt8 SharpenBlockSize;
                /// @internal
                /// @brief The weight surrounding pixels of the processing pixel have, with further pixels in the sample block getting reduced weight.
                UInt8 SharpenSigma;
            public:
                /// @brief Blank constructor.
                SharpenModifier();
                /// @brief Class destructor.
                virtual ~SharpenModifier();

                ///////////////////////////////////////////////////////////////////////////////
                // Utility

                /// @copydoc TextureModifier::Modify(TextureBuffer&)
                virtual void Modify(TextureBuffer& Buffer);
                /// @copydoc TextureModifier::GetName() const
                virtual String GetName() const;

                ///////////////////////////////////////////////////////////////////////////////
                // Configuration

                /// @brief Sets the type of sharpening operation to be used.
                /// @param Sharpen The type of Sharpening operation that will be performed.
                /// @return Returns a reference to this.
                SharpenModifier& SetSharpenType(const SharpenType Sharpen);
                /// @brief Sets the sample size for each pixel to be processed.
                /// @note This value is only used if ST_Gaussian is set as the sharpen type.
                /// @param Size The size of the block of pixels around each pixel to be processed that will be sampled.  Generally this value should be around in the range of 1 to 5.  Initial Value: 5.
                /// @return Returns a reference to this.
                SharpenModifier& SetBlockSize(const UInt8 Size);
                /// @brief Sets the sigma for each each pixel to be processed.
                /// @note This value is only used if ST_Gaussian is set as the sharpen type.
                /// @param Sigma The weight surrounding pixels of the processing pixel have, with further pixels in the sample block getting reduced weight.  Initial Value: 92.
                /// @return Returns a reference to this.
                SharpenModifier& SetSigma(const UInt8 Sigma);
            };//SharpenModifier
        }//Procedural
    }//Graphics
}//Mezzanine

#endif