OgreTextureManager.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) 2000-2012 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 _TextureManager_H__
#define _TextureManager_H__


#include "OgrePrerequisites.h"

#include "OgreResourceManager.h"
#include "OgreTexture.h"
#include "OgreSingleton.h"


namespace Ogre {

    class _OgreExport TextureManager : public ResourceManager, public Singleton<TextureManager>
    {
    public:

        TextureManager(void);
        virtual ~TextureManager();

        virtual ResourceCreateOrRetrieveResult createOrRetrieve(
            const String &name, const String& group, bool isManual = false,
            ManualResourceLoader* loader = 0, const NameValuePairList* createParams = 0,
            TextureType texType = TEX_TYPE_2D, int numMipmaps = MIP_DEFAULT, 
            Real gamma = 1.0f, bool isAlpha = false,
            PixelFormat desiredFormat = PF_UNKNOWN, bool hwGammaCorrection = false);

        virtual TexturePtr prepare( 
            const String& name, const String& group, 
            TextureType texType = TEX_TYPE_2D, int numMipmaps = MIP_DEFAULT, 
            Real gamma = 1.0f, bool isAlpha = false,
            PixelFormat desiredFormat = PF_UNKNOWN, bool hwGammaCorrection = false);

        virtual TexturePtr load( 
            const String& name, const String& group, 
            TextureType texType = TEX_TYPE_2D, int numMipmaps = MIP_DEFAULT, 
            Real gamma = 1.0f, bool isAlpha = false,
            PixelFormat desiredFormat = PF_UNKNOWN, 
            bool hwGammaCorrection = false);

        virtual TexturePtr loadImage( 
            const String &name, const String& group, const Image &img, 
            TextureType texType = TEX_TYPE_2D,
            int iNumMipmaps = MIP_DEFAULT, Real gamma = 1.0f, bool isAlpha = false,
            PixelFormat desiredFormat = PF_UNKNOWN, bool hwGammaCorrection = false);
            
        virtual TexturePtr loadRawData(const String &name, const String& group,
            DataStreamPtr& stream, ushort uWidth, ushort uHeight, 
            PixelFormat format, TextureType texType = TEX_TYPE_2D, 
            int iNumMipmaps = MIP_DEFAULT, Real gamma = 1.0f, bool hwGammaCorrection = false);

        virtual TexturePtr createManual(const String & name, const String& group,
            TextureType texType, uint width, uint height, uint depth, 
            int num_mips, PixelFormat format, int usage = TU_DEFAULT, ManualResourceLoader* loader = 0,
            bool hwGammaCorrection = false, uint fsaa = 0, const String& fsaaHint = StringUtil::BLANK);
            
        TexturePtr createManual(const String & name, const String& group,
            TextureType texType, uint width, uint height, int num_mips,
            PixelFormat format, int usage = TU_DEFAULT, ManualResourceLoader* loader = 0,
            bool hwGammaCorrection = false, uint fsaa = 0, const String& fsaaHint = StringUtil::BLANK)
        {
            return createManual(name, group, texType, width, height, 1, 
                num_mips, format, usage, loader, hwGammaCorrection, fsaa, fsaaHint);
        }

        virtual void setPreferredIntegerBitDepth(ushort bits, bool reloadTextures = true);

        virtual ushort getPreferredIntegerBitDepth(void) const;

        virtual void setPreferredFloatBitDepth(ushort bits, bool reloadTextures = true);

        virtual ushort getPreferredFloatBitDepth(void) const;

        virtual void setPreferredBitDepths(ushort integerBits, ushort floatBits, bool reloadTextures = true);

        virtual bool isFormatSupported(TextureType ttype, PixelFormat format, int usage);

        virtual bool isEquivalentFormatSupported(TextureType ttype, PixelFormat format, int usage);

        virtual PixelFormat getNativeFormat(TextureType ttype, PixelFormat format, int usage) = 0;

        virtual bool isHardwareFilteringSupported(TextureType ttype, PixelFormat format, int usage,
            bool preciseFormatOnly = false) = 0;

        virtual void setDefaultNumMipmaps(size_t num);

        virtual size_t getDefaultNumMipmaps()
        {
            return mDefaultNumMipmaps;
        }

        static TextureManager& getSingleton(void);
        static TextureManager* getSingletonPtr(void);

    protected:

        ushort mPreferredIntegerBitDepth;
        ushort mPreferredFloatBitDepth;
        size_t mDefaultNumMipmaps;
    };
}// Namespace

#endif