OgreTexture.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2014 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 _Texture_H__
#define _Texture_H__

#include "OgrePrerequisites.h"
#include "OgreHardwareBuffer.h"
#include "OgreResource.h"
#include "OgreImage.h"
#include "OgreHeaderPrefix.h"

namespace Ogre {

    enum TextureUsage
    {
        TU_STATIC = HardwareBuffer::HBU_STATIC,
        TU_DYNAMIC = HardwareBuffer::HBU_DYNAMIC,
        TU_WRITE_ONLY = HardwareBuffer::HBU_WRITE_ONLY,
        TU_STATIC_WRITE_ONLY = HardwareBuffer::HBU_STATIC_WRITE_ONLY, 
        TU_DYNAMIC_WRITE_ONLY = HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY,
        TU_DYNAMIC_WRITE_ONLY_DISCARDABLE = HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE,
        TU_AUTOMIPMAP = 16,
        TU_RENDERTARGET = 32,
        TU_DEFAULT = TU_AUTOMIPMAP | TU_STATIC_WRITE_ONLY
    };

    enum TextureType
    {
        TEX_TYPE_1D = 1,
        TEX_TYPE_2D = 2,
        TEX_TYPE_3D = 3,
        TEX_TYPE_CUBE_MAP = 4,
        TEX_TYPE_2D_ARRAY = 5,
        TEX_TYPE_2D_RECT = 6
    };

    enum TextureMipmap
    {
        MIP_UNLIMITED = 0x7FFFFFFF,
        MIP_DEFAULT = -1
    };

    class _OgreExport Texture : public Resource
    {
    public:
        Texture(ResourceManager* creator, const String& name, ResourceHandle handle,
            const String& group, bool isManual = false, ManualResourceLoader* loader = 0);

        virtual ~Texture() {}
        
        virtual void setTextureType(TextureType ttype ) { mTextureType = ttype; }

        virtual TextureType getTextureType(void) const { return mTextureType; }

        virtual uint8 getNumMipmaps(void) const {return mNumMipmaps;}

        virtual void setNumMipmaps(uint8 num) {mNumRequestedMipmaps = mNumMipmaps = num;}

        virtual bool getMipmapsHardwareGenerated(void) const { return mMipmapsHardwareGenerated; }

        virtual float getGamma(void) const { return mGamma; }

        virtual void setGamma(float g) { mGamma = g; }

        virtual void setHardwareGammaEnabled(bool enabled) { mHwGamma = enabled; }

        virtual bool isHardwareGammaEnabled() const { return mHwGamma; }

        virtual void setFSAA(uint fsaa, const String& fsaaHint) { mFSAA = fsaa; mFSAAHint = fsaaHint; }

        virtual uint getFSAA() const { return mFSAA; }

        virtual const String& getFSAAHint() const { return mFSAAHint; }

        virtual uint32 getHeight(void) const { return mHeight; }

        virtual uint32 getWidth(void) const { return mWidth; }

        virtual uint32 getDepth(void) const { return mDepth; }

        virtual uint32 getSrcHeight(void) const { return mSrcHeight; }

        virtual uint32 getSrcWidth(void) const { return mSrcWidth; }

        virtual uint32 getSrcDepth(void) const { return mSrcDepth; }

        virtual void setHeight(uint32 h) { mHeight = mSrcHeight = h; }

        virtual void setWidth(uint32 w) { mWidth = mSrcWidth = w; }

        virtual void setDepth(uint32 d)  { mDepth = mSrcDepth = d; }

        virtual int getUsage() const
        {
            return mUsage;
        }

        virtual void setUsage(int u) { mUsage = u; }

        virtual void createInternalResources(void);

        virtual void freeInternalResources(void);
        
        virtual void copyToTexture( TexturePtr& target );

        virtual void loadImage( const Image &img );
            
        virtual void loadRawData( DataStreamPtr& stream, 
            ushort uWidth, ushort uHeight, PixelFormat eFormat);

        virtual void _loadImages( const ConstImagePtrList& images );

        virtual PixelFormat getFormat() const
        {
            return mFormat;
        }

        virtual PixelFormat getDesiredFormat(void) const
        {
            return mDesiredFormat;
        }

        virtual PixelFormat getSrcFormat(void) const
        {
            return mSrcFormat;
        }

        virtual void setFormat(PixelFormat pf);

        virtual bool hasAlpha(void) const;

        virtual void setDesiredIntegerBitDepth(ushort bits);

        virtual ushort getDesiredIntegerBitDepth(void) const;

        virtual void setDesiredFloatBitDepth(ushort bits);

        virtual ushort getDesiredFloatBitDepth(void) const;

        virtual void setDesiredBitDepths(ushort integerBits, ushort floatBits);

        virtual void setTreatLuminanceAsAlpha(bool asAlpha);

        virtual bool getTreatLuminanceAsAlpha(void) const;

        virtual size_t getNumFaces() const;

        virtual HardwarePixelBufferSharedPtr getBuffer(size_t face=0, size_t mipmap=0) = 0;


        virtual void convertToImage(Image& destImage, bool includeMipMaps = false);
        
        virtual void getCustomAttribute(const String& name, void* pData) {}
        


    protected:
        uint32 mHeight;
        uint32 mWidth;
        uint32 mDepth;

        uint8 mNumRequestedMipmaps;
        uint8 mNumMipmaps;
        bool mMipmapsHardwareGenerated;
        float mGamma;
        bool mHwGamma;
        uint mFSAA;
        String mFSAAHint;

        TextureType mTextureType;
        PixelFormat mFormat;
        int mUsage; 

        PixelFormat mSrcFormat;
        uint32 mSrcWidth, mSrcHeight, mSrcDepth;

        PixelFormat mDesiredFormat;
        unsigned short mDesiredIntegerBitDepth;
        unsigned short mDesiredFloatBitDepth;
        bool mTreatLuminanceAsAlpha;

        bool mInternalResourcesCreated;

        size_t calculateSize(void) const;
        

        virtual void createInternalResourcesImpl(void) = 0;

        virtual void freeInternalResourcesImpl(void) = 0;

        void unloadImpl(void);

        String getSourceFileType() const;

    };
}

#include "OgreHeaderSuffix.h"

#endif