texturebuffer.cpp

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

    The Mezzanine Engine is free software: you can redistribute it and/or modify
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    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with The Mezzanine Engine.  If not, see <http://www.gnu.org/licenses/>.
*/
/* 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
 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 _graphicsproceduraltexturebuffer_cpp
#define _graphicsproceduraltexturebuffer_cpp

#include "Graphics/Procedural/Texture/texturebuffer.h"
#include "Graphics/Procedural/proceduralenumerations.h"

#include "Graphics/texturemanager.h"
#include "Graphics/texture.h"
#include "Graphics/image.h"

#include "MathTools/mathtools.h"

#include <OgrePixelFormat.h>

#include <cstring>
#include <limits>

#ifdef LoadImage
#undef LoadImage
#endif

namespace Mezzanine
{
    namespace Graphics
    {
        namespace Procedural
        {
            TextureBuffer::TextureBuffer(const Whole SquareSize) :
                Width( std::max(SquareSize,Whole(8)) ),
                Height( std::max(SquareSize,Whole(8)) )
            {
                this->Pixels = new ColourChannelType[ this->GetSubChannelCount() ];
                memset(this->Pixels, 0, this->GetByteSize());
                for( Whole Y = 0 ; Y < this->Height ; Y++ )
                {
                    for( Whole X = 0 ; X < this->Width ; X++ )
                    {
                        this->SetAlphaByte( X, Y, std::numeric_limits<ColourChannelType>::max() );
                    }
                }
            }

            TextureBuffer::TextureBuffer(const Whole TexWidth, const Whole TexHeight) :
                Width( std::max(TexWidth,Whole(8)) ),
                Height( std::max(TexHeight,Whole(8)) )
            {
                this->Pixels = new ColourChannelType[ this->GetSubChannelCount() ];
                memset(this->Pixels, 0, this->GetByteSize() );
                for( Whole Y = 0 ; Y < this->Height ; Y++ )
                {
                    for( Whole X = 0 ; X < this->Width ; X++ )
                    {
                        this->SetAlphaByte( X, Y, std::numeric_limits<ColourChannelType>::max() );
                    }
                }
            }

            TextureBuffer::TextureBuffer(const TextureBuffer& Other) :
                Pixels(NULL),
                Width( 8 ),
                Height( 8 )
                { this->SetData(Other); }

            TextureBuffer::~TextureBuffer()
                { delete[] Pixels; }

            TextureBuffer::ColourChannelType& TextureBuffer::GetPixel(const Whole X, const Whole Y, const UInt16 Component)
            {
                if( X >= this->Width || Y >= this->Height ) {
                    MEZZ_EXCEPTION(ExceptionBase::MM_OUT_OF_BOUNDS_EXCEPTION,"Requesting pixel position in TextureBuffer that is out of bounds.");
                }

                return this->Pixels[ Y * this->Width * 4 + X * 4 + Component * sizeof(ColourChannelType) ];
            }

            const TextureBuffer::ColourChannelType& TextureBuffer::GetPixel(const Whole X, const Whole Y, const UInt16 Component) const
            {
                if( X >= this->Width || Y >= this->Height ) {
                    MEZZ_EXCEPTION(ExceptionBase::MM_OUT_OF_BOUNDS_EXCEPTION,"Requesting pixel position in TextureBuffer that is out of bounds.");
                }

                return this->Pixels[ Y * this->Width * 4 + X * 4 + Component * sizeof(ColourChannelType) ];
            }

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

            void TextureBuffer::SetData(const TextureBuffer& Other)
            {
                if( Other.Pixels != NULL ) {
                    if( this->Width != Other.Width || this->Height != Other.Height ) {
                        this->Width = Other.GetWidth();
                        this->Height = Other.GetHeight();

                        if( this->Pixels != NULL ) {
                            delete[] this->Pixels;
                        }

                        this->Pixels = new ColourChannelType[ this->GetSubChannelCount() ];
                    }
                    memcpy(this->Pixels, Other.Pixels, this->GetByteSize());
                }
            }

            Whole TextureBuffer::GetWidth() const
                { return this->Width; }

            Whole TextureBuffer::GetHeight() const
                { return this->Height; }

            Whole TextureBuffer::GetPixelCount() const
                { return this->Width * this->Height; }

            Whole TextureBuffer::GetSubChannelCount() const
                { return this->GetPixelCount() * 4; }

            Whole TextureBuffer::GetByteSize() const
                { return this->GetSubChannelCount() * sizeof(ColourChannelType); }

            Image* TextureBuffer::GenerateImage(const Graphics::PixelFormat Format) const
            {
                ColourChannelType* NewBuff = new ColourChannelType[ this->GetSubChannelCount() ];
                Ogre::PixelUtil::bulkPixelConversion(this->Pixels,static_cast<Ogre::PixelFormat>(Graphics::PF_R8G8B8A8),NewBuff,static_cast<Ogre::PixelFormat>(Format),this->GetPixelCount());
                Image* NewImage = new Image(NewBuff,this->Width,this->Height,Format,true);
                return NewImage;
            }

            Texture* TextureBuffer::GenerateTexture(const String& TexName, const String& TexGroup, const Graphics::PixelFormat Format) const
            {
                Texture* Ret = Graphics::TextureManager::GetSingletonPtr()->CreateManualTexture(TexName,TexGroup,Graphics::TT_2D,this->Width,this->Height,0,Format);
                Ret->_WriteToBuffer(this->Pixels,this->GetByteSize(),Graphics::PF_R8G8B8A8);
                return Ret;
            }

            ///////////////////////////////////////////////////////////////////////////////
            // Pixel Configuration

            void TextureBuffer::SetPixel(const Whole X, const Whole Y, const ColourValue& Colour)
            {
                this->SetPixelReal(X,Y,Colour.RedChannel,Colour.GreenChannel,Colour.BlueChannel,Colour.AlphaChannel);
            }

            void TextureBuffer::SetPixelByte(const Whole X, const Whole Y, const ColourChannelType Red, const ColourChannelType Green, const ColourChannelType Blue, const ColourChannelType Alpha)
            {
                this->SetRedByte(X,Y,Red);
                this->SetGreenByte(X,Y,Green);
                this->SetBlueByte(X,Y,Blue);
                this->SetAlphaByte(X,Y,Alpha);
            }

            void TextureBuffer::SetPixelReal(const Whole X, const Whole Y, const Real Red, const Real Green, const Real Blue, const Real Alpha)
            {
                this->SetRedReal(X,Y,Red);
                this->SetGreenReal(X,Y,Green);
                this->SetBlueReal(X,Y,Blue);
                this->SetAlphaReal(X,Y,Alpha);
            }

            ColourValue TextureBuffer::GetPixel(const Whole X, const Whole Y) const
                { return ColourValue( this->GetRedReal(X,Y), this->GetGreenReal(X,Y), this->GetBlueReal(X,Y), this->GetAlphaReal(X,Y) ); }

            void TextureBuffer::SetRedByte(const Whole X, const Whole Y, const ColourChannelType Red)
                { this->GetPixel(X,Y,Procedural::CCI_Red) = Red; }

            void TextureBuffer::SetRedReal(const Whole X, const Whole Y, const Real Red)
            {
                if( Red > 1.0 || Red < 0.0 )
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_RANGE_EXCEPTION,"Red colour component to be set is outside the expected range [0.0-1.0]."); }
                this->GetPixel(X,Y,Procedural::CCI_Red) = static_cast<ColourChannelType>( MathTools::Clamp(Red * Real(255.0),Real(0.0),Real(255.0)) );
            }

            TextureBuffer::ColourChannelType TextureBuffer::GetRedByte(const Whole X, const Whole Y) const
                { return this->GetPixel(X,Y,Procedural::CCI_Red); }

            Real TextureBuffer::GetRedReal(const Whole X, const Whole Y) const
                { return ( static_cast<Real>( this->GetPixel(X,Y,Procedural::CCI_Red) ) / 255.0 ); }

            void TextureBuffer::SetGreenByte(const Whole X, const Whole Y, const ColourChannelType Green)
                { this->GetPixel(X,Y,Procedural::CCI_Green) = Green; }

            void TextureBuffer::SetGreenReal(const Whole X, const Whole Y, const Real Green)
            {
                if( Green > 1.0 || Green < 0.0 )
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_RANGE_EXCEPTION,"Green colour component to be set is outside the expected range [0.0-1.0]."); }
                this->GetPixel(X,Y,Procedural::CCI_Green) = static_cast<ColourChannelType>( MathTools::Clamp(Green * Real(255.0),Real(0.0),Real(255.0)) );
            }

            TextureBuffer::ColourChannelType TextureBuffer::GetGreenByte(const Whole X, const Whole Y) const
                { return this->GetPixel(X,Y,Procedural::CCI_Green); }

            Real TextureBuffer::GetGreenReal(const Whole X, const Whole Y) const
                { return ( static_cast<Real>( this->GetPixel(X,Y,Procedural::CCI_Green) ) / 255.0 ); }

            void TextureBuffer::SetBlueByte(const Whole X, const Whole Y, const ColourChannelType Blue)
                { this->GetPixel(X,Y,Procedural::CCI_Blue) = Blue; }

            void TextureBuffer::SetBlueReal(const Whole X, const Whole Y, const Real Blue)
            {
                if( Blue > 1.0 || Blue < 0.0 )
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_RANGE_EXCEPTION,"Blue colour component to be set is outside the expected range [0.0-1.0]."); }
                this->GetPixel(X,Y,Procedural::CCI_Blue) = static_cast<ColourChannelType>( MathTools::Clamp(Blue * Real(255.0),Real(0.0),Real(255.0)) );
            }

            TextureBuffer::ColourChannelType TextureBuffer::GetBlueByte(const Whole X, const Whole Y) const
                { return this->GetPixel(X,Y,Procedural::CCI_Blue); }

            Real TextureBuffer::GetBlueReal(const Whole X, const Whole Y) const
                { return ( static_cast<Real>( this->GetPixel(X,Y,Procedural::CCI_Blue) ) / 255.0 ); }

            void TextureBuffer::SetAlphaByte(const Whole X, const Whole Y, const ColourChannelType Alpha)
                { this->GetPixel(X,Y,Procedural::CCI_Alpha) = Alpha; }

            void TextureBuffer::SetAlphaReal(const Whole X, const Whole Y, const Real Alpha)
            {
                if( Alpha > 1.0 || Alpha < 0.0 )
                    { MEZZ_EXCEPTION(ExceptionBase::PARAMETERS_RANGE_EXCEPTION,"Alpha colour component to be set is outside the expected range [0.0-1.0]."); }
                this->GetPixel(X,Y,Procedural::CCI_Alpha) = static_cast<ColourChannelType>( MathTools::Clamp(Alpha * Real(255.0),Real(0.0),Real(255.0)) );
            }

            TextureBuffer::ColourChannelType TextureBuffer::GetAlphaByte(const Whole X, const Whole Y) const
                { return this->GetPixel(X,Y,Procedural::CCI_Alpha); }

            Real TextureBuffer::GetAlphaReal(const Whole X, const Whole Y) const
                { return ( static_cast<Real>( this->GetPixel(X,Y,Procedural::CCI_Alpha) ) / 255.0 ); }
        }//Procedural
    }//Graphics
}//Mezzanine

#endif