BansheeEngine/CamelotRenderer/OgreTextureUnitState.cpp

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

Copyright (c) 2000-2011 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.
-----------------------------------------------------------------------------
*/
#include "OgreTextureUnitState.h"
#include "OgreException.h"

namespace Ogre {

    //-----------------------------------------------------------------------
    TextureUnitState::TextureUnitState(Pass* parent)
        : mCurrentFrame(0)
		, mAnimDuration(0)
		, mCubic(false)
		, mTextureType(TEX_TYPE_2D)
        , mDesiredFormat(PF_UNKNOWN)
		, mTextureSrcMipmaps(MIP_DEFAULT)
		, mTextureCoordSetIndex(0)
		, mBorderColour(ColourValue::Black)
		, mTextureLoadFailed(false)
		, mIsAlpha(false)
		, mHwGamma(false)
		, mRecalcTexMatrix(false)
		, mUMod(0)
		, mVMod(0)
		, mUScale(1)
		, mVScale(1)
		, mRotate(0)
		, mTexModMatrix(Matrix4::IDENTITY)
		, mMinFilter(FO_LINEAR)
		, mMagFilter(FO_LINEAR)
		, mMipFilter(FO_POINT)
		, mMaxAniso(0)
		, mMipmapBias(0)
		, mIsDefaultAniso(true)
		, mIsDefaultFiltering(true)
		, mBindingType(BT_FRAGMENT)
		, mContentType(CONTENT_NAMED)
		, mParent(parent)
    {
		mColourBlendMode.blendType = LBT_COLOUR;
		mAlphaBlendMode.operation = LBX_MODULATE;
		mAlphaBlendMode.blendType = LBT_ALPHA;
		mAlphaBlendMode.source1 = LBS_TEXTURE;
		mAlphaBlendMode.source2 = LBS_CURRENT;
		setColourOperation(LBO_MODULATE);
		setTextureAddressingMode(TAM_WRAP);
    }

    //-----------------------------------------------------------------------
    TextureUnitState::TextureUnitState(Pass* parent, const TextureUnitState& oth )
    {
        mParent = parent;
        *this = oth;
    }

    //-----------------------------------------------------------------------
    TextureUnitState::TextureUnitState( Pass* parent, const String& texName, unsigned int texCoordSet)
		: mCurrentFrame(0)
		, mAnimDuration(0)
		, mCubic(false)
		, mTextureType(TEX_TYPE_2D)
        , mDesiredFormat(PF_UNKNOWN)
		, mTextureSrcMipmaps(MIP_DEFAULT)
		, mTextureCoordSetIndex(0)
		, mBorderColour(ColourValue::Black)
		, mTextureLoadFailed(false)
		, mIsAlpha(false)
		, mHwGamma(false)
		, mRecalcTexMatrix(false)
		, mUMod(0)
		, mVMod(0)
		, mUScale(1)
		, mVScale(1)
		, mRotate(0)
		, mTexModMatrix(Matrix4::IDENTITY)
		, mMinFilter(FO_LINEAR)
		, mMagFilter(FO_LINEAR)
		, mMipFilter(FO_POINT)
		, mMaxAniso(0)
		, mMipmapBias(0)
		, mIsDefaultAniso(true)
		, mIsDefaultFiltering(true)
		, mBindingType(BT_FRAGMENT)
		, mContentType(CONTENT_NAMED)
		, mParent(parent)
    {
		mColourBlendMode.blendType = LBT_COLOUR;
		mAlphaBlendMode.operation = LBX_MODULATE;
		mAlphaBlendMode.blendType = LBT_ALPHA;
		mAlphaBlendMode.source1 = LBS_TEXTURE;
		mAlphaBlendMode.source2 = LBS_CURRENT;
		setColourOperation(LBO_MODULATE);
		setTextureAddressingMode(TAM_WRAP);

        setTextureName(texName);
        setTextureCoordSet(texCoordSet);
    }
    //-----------------------------------------------------------------------
    TextureUnitState::~TextureUnitState()
    {
        // Unload ensure all controllers destroyed
        _unload();
    }
    //-----------------------------------------------------------------------
    TextureUnitState & TextureUnitState::operator = ( 
        const TextureUnitState &oth )
    {
        assert(mEffects.empty());

        // copy basic members (int's, real's)
        memcpy( this, &oth, (uchar *)(&oth.mFrames) - (uchar *)(&oth) );
        // copy complex members
        mFrames  = oth.mFrames;
		mFramePtrs = oth.mFramePtrs;
        mName    = oth.mName;
        mEffects = oth.mEffects;

        mTextureNameAlias = oth.mTextureNameAlias;
		mCompositorRefName = oth.mCompositorRefName;
		mCompositorRefTexName = oth.mCompositorRefTexName;

        // Load immediately if Material loaded
        if (isLoaded())
        {
            _load();
        }

        return *this;
    }
    //-----------------------------------------------------------------------
    const String& TextureUnitState::getTextureName(void) const
    {
        // Return name of current frame
        if (mCurrentFrame < mFrames.size())
            return mFrames[mCurrentFrame];
        else
            return StringUtil::BLANK;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureName( const String& name, TextureType texType)
    {
		setContentType(CONTENT_NAMED);
		mTextureLoadFailed = false;

		if (texType == TEX_TYPE_CUBE_MAP)
        {
            // delegate to cubic texture implementation
            setCubicTextureName(name, true);
        }
        else
        {
            mFrames.resize(1);
			mFramePtrs.resize(1);
            mFrames[0] = name;
			mFramePtrs[0] = nullptr;
			// defer load until used, so don't grab pointer yet
            mCurrentFrame = 0;
            mCubic = false;
            mTextureType = texType;
            if (name.empty())
            {
                return;
            }

            
            // Load immediately ?
            if (isLoaded())
            {
                _load(); // reload
            }
        }

    }
	//-----------------------------------------------------------------------
	void TextureUnitState::setBindingType(TextureUnitState::BindingType bt)
	{
		mBindingType = bt;

	}
	//-----------------------------------------------------------------------
	TextureUnitState::BindingType TextureUnitState::getBindingType(void) const
	{
		return mBindingType;
	}
	//-----------------------------------------------------------------------
	void TextureUnitState::setContentType(TextureUnitState::ContentType ct)
	{
		mContentType = ct;
		if (ct == CONTENT_SHADOW || ct == CONTENT_COMPOSITOR)
		{
			// Clear out texture frames, not applicable
			mFrames.clear();
			// One reference space, set manually through _setTexturePtr
			mFramePtrs.resize(1);
			mFramePtrs[0] = nullptr;
		}
	}
	//-----------------------------------------------------------------------
	TextureUnitState::ContentType TextureUnitState::getContentType(void) const
	{
		return mContentType;
	}
    //-----------------------------------------------------------------------
    void TextureUnitState::setCubicTextureName( const String& name, bool forUVW)
    {
        if (forUVW)
        {
            setCubicTextureName(&name, forUVW);
        }
        else
        {
			setContentType(CONTENT_NAMED);
			mTextureLoadFailed = false;
            String ext;
            String suffixes[6] = {"_fr", "_bk", "_lf", "_rt", "_up", "_dn"};
            String baseName;
            String fullNames[6];

            size_t pos = name.find_last_of(".");
			if( pos != String::npos )
			{
				baseName = name.substr(0, pos);
				ext = name.substr(pos);
			}
			else
				baseName = name;

            for (int i = 0; i < 6; ++i)
            {
                fullNames[i] = baseName + suffixes[i] + ext;
            }

            setCubicTextureName(fullNames, forUVW);
        }
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setCubicTextureName(const String* const names, bool forUVW)
    {
		setContentType(CONTENT_NAMED);
		mTextureLoadFailed = false;
        mFrames.resize(forUVW ? 1 : 6);
		// resize pointers, but don't populate until asked for
        mFramePtrs.resize(forUVW ? 1 : 6);
		mAnimDuration = 0;
        mCurrentFrame = 0;
        mCubic = true;
        mTextureType = forUVW ? TEX_TYPE_CUBE_MAP : TEX_TYPE_2D;

        for (unsigned int i = 0; i < mFrames.size(); ++i)
        {
            mFrames[i] = names[i];
			mFramePtrs[i] = nullptr;
        }
    }
    //-----------------------------------------------------------------------
    bool TextureUnitState::isCubic(void) const
    {
        return mCubic;
    }
    //-----------------------------------------------------------------------
    bool TextureUnitState::is3D(void) const
    {
        return mTextureType == TEX_TYPE_CUBE_MAP;
    }
    //-----------------------------------------------------------------------
    TextureType TextureUnitState::getTextureType(void) const
    {
        return mTextureType;

    }

    //-----------------------------------------------------------------------
    void TextureUnitState::setFrameTextureName(const String& name, unsigned int frameNumber)
    {
		mTextureLoadFailed = false;
        if (frameNumber < mFrames.size())
        {
            mFrames[frameNumber] = name;
			// reset pointer (don't populate until requested)
			mFramePtrs[frameNumber] = nullptr;

            if (isLoaded())
            {
                _load(); // reload
            }
        }
        else // raise exception for frameNumber out of bounds
        {
            OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "frameNumber paramter value exceeds number of stored frames.",
                "TextureUnitState::setFrameTextureName");
        }
    }

    //-----------------------------------------------------------------------
    void TextureUnitState::addFrameTextureName(const String& name)
    {
		setContentType(CONTENT_NAMED);
		mTextureLoadFailed = false;

        mFrames.push_back(name);
		// Add blank pointer, load on demand
		mFramePtrs.push_back(TexturePtr());

        // Load immediately if Material loaded
        if (isLoaded())
        {
            _load();
        }
    }

    //-----------------------------------------------------------------------
    void TextureUnitState::deleteFrameTextureName(const size_t frameNumber)
    {
		mTextureLoadFailed = false;
        if (frameNumber < mFrames.size())
        {
            mFrames.erase(mFrames.begin() + frameNumber);
            mFramePtrs.erase(mFramePtrs.begin() + frameNumber);

            if (isLoaded())
            {
                _load();
            }
        }
        else
        {
            OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "frameNumber paramter value exceeds number of stored frames.",
                "TextureUnitState::deleteFrameTextureName");
        }
    }

    //-----------------------------------------------------------------------
    void TextureUnitState::setAnimatedTextureName( const String& name, unsigned int numFrames, Real duration)
    {
		setContentType(CONTENT_NAMED);
		mTextureLoadFailed = false;

		String ext;
        String baseName;

        size_t pos = name.find_last_of(".");
        baseName = name.substr(0, pos);
        ext = name.substr(pos);

        mFrames.resize(numFrames);
		// resize pointers, but don't populate until needed
        mFramePtrs.resize(numFrames);
        mAnimDuration = duration;
        mCurrentFrame = 0;
        mCubic = false;

        for (unsigned int i = 0; i < mFrames.size(); ++i)
        {
			StringUtil::StrStreamType str;
            str << baseName << "_" << i << ext;
            mFrames[i] = str.str();
			mFramePtrs[i] = nullptr;
        }

        // Load immediately if Material loaded
        if (isLoaded())
        {
            _load();
        }
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setAnimatedTextureName(const String* const names, unsigned int numFrames, Real duration)
    {
		setContentType(CONTENT_NAMED);
		mTextureLoadFailed = false;

		mFrames.resize(numFrames);
		// resize pointers, but don't populate until needed
        mFramePtrs.resize(numFrames);
        mAnimDuration = duration;
        mCurrentFrame = 0;
        mCubic = false;

        for (unsigned int i = 0; i < mFrames.size(); ++i)
        {
            mFrames[i] = names[i];
			mFramePtrs[i] = nullptr;
        }

        // Load immediately if Material loaded
        if (isLoaded())
        {
            _load();
        }
    }
    //-----------------------------------------------------------------------
    std::pair< size_t, size_t > TextureUnitState::getTextureDimensions( unsigned int frame ) const
    {
		
		TexturePtr tex = _getTexturePtr(frame);
	    if (tex == nullptr)
		    OGRE_EXCEPT( Exception::ERR_ITEM_NOT_FOUND, "Could not find texture " + mFrames[ frame ],
		    "TextureUnitState::getTextureDimensions" );

		return std::pair< size_t, size_t >( tex->getWidth(), tex->getHeight() );
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setCurrentFrame(unsigned int frameNumber)
    {
        if (frameNumber < mFrames.size())
        {
            mCurrentFrame = frameNumber;
        }
        else
        {
            OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "frameNumber paramter value exceeds number of stored frames.",
                "TextureUnitState::setCurrentFrame");
        }

    }
    //-----------------------------------------------------------------------
    unsigned int TextureUnitState::getCurrentFrame(void) const
    {
        return mCurrentFrame;
    }
    //-----------------------------------------------------------------------
    unsigned int TextureUnitState::getNumFrames(void) const
    {
        return (unsigned int)mFrames.size();
    }
    //-----------------------------------------------------------------------
    const String& TextureUnitState::getFrameTextureName(unsigned int frameNumber) const
    {
        if (frameNumber >= mFrames.size())
        {
            OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "frameNumber paramter value exceeds number of stored frames.",
                "TextureUnitState::getFrameTextureName");
        }

        return mFrames[frameNumber];
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setDesiredFormat(PixelFormat desiredFormat)
    {
        mDesiredFormat = desiredFormat;
    }
    //-----------------------------------------------------------------------
    PixelFormat TextureUnitState::getDesiredFormat(void) const
    {
        return mDesiredFormat;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setNumMipmaps(int numMipmaps)
    {
        mTextureSrcMipmaps = numMipmaps;
    }
    //-----------------------------------------------------------------------
    int TextureUnitState::getNumMipmaps(void) const
    {
        return mTextureSrcMipmaps;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setIsAlpha(bool isAlpha)
    {
        mIsAlpha = isAlpha;
    }
    //-----------------------------------------------------------------------
    bool TextureUnitState::getIsAlpha(void) const
    {
        return mIsAlpha;
    }
	//-----------------------------------------------------------------------
	void TextureUnitState::setHardwareGammaEnabled(bool g)
	{
		mHwGamma = g;
	}
	//-----------------------------------------------------------------------
	bool TextureUnitState::isHardwareGammaEnabled() const
	{
		return mHwGamma;
	}
    //-----------------------------------------------------------------------
    unsigned int TextureUnitState::getTextureCoordSet(void) const
    {
        return mTextureCoordSetIndex;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureCoordSet(unsigned int set)
    {
        mTextureCoordSetIndex = set;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setColourOperationEx(LayerBlendOperationEx op,
        LayerBlendSource source1,
        LayerBlendSource source2,
        const ColourValue& arg1,
        const ColourValue& arg2,
        Real manualBlend)
    {
        mColourBlendMode.operation = op;
        mColourBlendMode.source1 = source1;
        mColourBlendMode.source2 = source2;
        mColourBlendMode.colourArg1 = arg1;
        mColourBlendMode.colourArg2 = arg2;
        mColourBlendMode.factor = manualBlend;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setColourOperation(LayerBlendOperation op)
    {
        // Set up the multitexture and multipass blending operations
        switch (op)
        {
        case LBO_REPLACE:
            setColourOperationEx(LBX_SOURCE1, LBS_TEXTURE, LBS_CURRENT);
            setColourOpMultipassFallback(SBF_ONE, SBF_ZERO);
            break;
        case LBO_ADD:
            setColourOperationEx(LBX_ADD, LBS_TEXTURE, LBS_CURRENT);
            setColourOpMultipassFallback(SBF_ONE, SBF_ONE);
            break;
        case LBO_MODULATE:
            setColourOperationEx(LBX_MODULATE, LBS_TEXTURE, LBS_CURRENT);
            setColourOpMultipassFallback(SBF_DEST_COLOUR, SBF_ZERO);
            break;
        case LBO_ALPHA_BLEND:
            setColourOperationEx(LBX_BLEND_TEXTURE_ALPHA, LBS_TEXTURE, LBS_CURRENT);
            setColourOpMultipassFallback(SBF_SOURCE_ALPHA, SBF_ONE_MINUS_SOURCE_ALPHA);
            break;
        }


    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setColourOpMultipassFallback(SceneBlendFactor sourceFactor, SceneBlendFactor destFactor)
    {
        mColourBlendFallbackSrc = sourceFactor;
        mColourBlendFallbackDest = destFactor;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setAlphaOperation(LayerBlendOperationEx op,
        LayerBlendSource source1,
        LayerBlendSource source2,
        Real arg1,
        Real arg2,
        Real manualBlend)
    {
        mAlphaBlendMode.operation = op;
        mAlphaBlendMode.source1 = source1;
        mAlphaBlendMode.source2 = source2;
        mAlphaBlendMode.alphaArg1 = arg1;
        mAlphaBlendMode.alphaArg2 = arg2;
        mAlphaBlendMode.factor = manualBlend;
    }
    //-----------------------------------------------------------------------
    bool TextureUnitState::isBlank(void) const
    {
		if (mFrames.empty())
			return true;
		else
			return mFrames[0].empty() || mTextureLoadFailed;
    }

    //-----------------------------------------------------------------------
    SceneBlendFactor TextureUnitState::getColourBlendFallbackSrc(void) const
    {
        return mColourBlendFallbackSrc;
    }
    //-----------------------------------------------------------------------
    SceneBlendFactor TextureUnitState::getColourBlendFallbackDest(void) const
    {
        return mColourBlendFallbackDest;
    }
    //-----------------------------------------------------------------------
    const LayerBlendModeEx& TextureUnitState::getColourBlendMode(void) const
    {
        return mColourBlendMode;
    }
    //-----------------------------------------------------------------------
    const LayerBlendModeEx& TextureUnitState::getAlphaBlendMode(void) const
    {
        return mAlphaBlendMode;
    }
    //-----------------------------------------------------------------------
    const TextureUnitState::UVWAddressingMode& 
	TextureUnitState::getTextureAddressingMode(void) const
    {
        return mAddressMode;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureAddressingMode(
		TextureUnitState::TextureAddressingMode tam)
    {
        mAddressMode.u = tam;
        mAddressMode.v = tam;
        mAddressMode.w = tam;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureAddressingMode(
		TextureUnitState::TextureAddressingMode u, 
		TextureUnitState::TextureAddressingMode v,
		TextureUnitState::TextureAddressingMode w)
    {
        mAddressMode.u = u;
        mAddressMode.v = v;
        mAddressMode.w = w;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureAddressingMode(
		const TextureUnitState::UVWAddressingMode& uvw)
    {
        mAddressMode = uvw;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureBorderColour(const ColourValue& colour)
    {
        mBorderColour = colour;
    }
    //-----------------------------------------------------------------------
    const ColourValue& TextureUnitState::getTextureBorderColour(void) const
    {
        return mBorderColour;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setBlank(void)
    {
		setTextureName(StringUtil::BLANK);
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureTransform(const Matrix4& xform)
    {
        mTexModMatrix = xform;
        mRecalcTexMatrix = false;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureScroll(Real u, Real v)
    {
        mUMod = u;
        mVMod = v;
        mRecalcTexMatrix = true;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureScale(Real uScale, Real vScale)
    {
        mUScale = uScale;
        mVScale = vScale;
        mRecalcTexMatrix = true;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureRotate(const Radian& angle)
    {
        mRotate = angle;
        mRecalcTexMatrix = true;
    }
    //-----------------------------------------------------------------------
    const Matrix4& TextureUnitState::getTextureTransform() const
    {
        if (mRecalcTexMatrix)
            recalcTextureMatrix();
        return mTexModMatrix;

    }
    //-----------------------------------------------------------------------
    void TextureUnitState::recalcTextureMatrix() const
    {
        // Assumption: 2D texture coords
        Matrix4 xform;

        xform = Matrix4::IDENTITY;
        if (mUScale != 1 || mVScale != 1)
        {
            // Offset to center of texture
            xform[0][0] = 1/mUScale;
            xform[1][1] = 1/mVScale;
            // Skip matrix concat since first matrix update
            xform[0][3] = (-0.5f * xform[0][0]) + 0.5f;
            xform[1][3] = (-0.5f * xform[1][1]) + 0.5f;
        }

        if (mUMod || mVMod)
        {
            Matrix4 xlate = Matrix4::IDENTITY;

            xlate[0][3] = mUMod;
            xlate[1][3] = mVMod;

            xform = xlate * xform;
        }

        if (mRotate != Radian(0))
        {
            Matrix4 rot = Matrix4::IDENTITY;
            Radian theta ( mRotate );
            Real cosTheta = Math::Cos(theta);
            Real sinTheta = Math::Sin(theta);

            rot[0][0] = cosTheta;
            rot[0][1] = -sinTheta;
            rot[1][0] = sinTheta;
            rot[1][1] = cosTheta;
            // Offset center of rotation to center of texture
            rot[0][3] = 0.5f + ( (-0.5f * cosTheta) - (-0.5f * sinTheta) );
            rot[1][3] = 0.5f + ( (-0.5f * sinTheta) + (-0.5f * cosTheta) );

            xform = rot * xform;
        }

        mTexModMatrix = xform;
        mRecalcTexMatrix = false;

    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureUScroll(Real value)
    {
        mUMod = value;
        mRecalcTexMatrix = true;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureVScroll(Real value)
    {
        mVMod = value;
        mRecalcTexMatrix = true;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureUScale(Real value)
    {
        mUScale = value;
        mRecalcTexMatrix = true;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureVScale(Real value)
    {
        mVScale = value;
        mRecalcTexMatrix = true;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::_prepare(void)
    {
        // Unload first
        //_unload();

        // Load textures
		for (unsigned int i = 0; i < mFrames.size(); ++i)
		{
			ensurePrepared(i);
		}
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::_load(void)
    {

        // Load textures
		for (unsigned int i = 0; i < mFrames.size(); ++i)
		{
			ensureLoaded(i);
		}
    }
    //-----------------------------------------------------------------------
	const TexturePtr& TextureUnitState::_getTexturePtr(void) const
	{
		return _getTexturePtr(mCurrentFrame);
	}
    //-----------------------------------------------------------------------
	const TexturePtr& TextureUnitState::_getTexturePtr(size_t frame) const
	{
		if (mContentType == CONTENT_NAMED)
		{
			if (frame < mFrames.size() && !mTextureLoadFailed)
			{
				ensureLoaded(frame);
				return mFramePtrs[frame];
			}
			else
			{
				// Silent fail with empty texture for internal method
				static TexturePtr nullTexPtr;
				return nullTexPtr;
			}
		}
		else
		{
			// Manually bound texture, no name or loading
			assert(frame < mFramePtrs.size());
			return mFramePtrs[frame];

		}
		
	}
	//-----------------------------------------------------------------------
	void TextureUnitState::_setTexturePtr(const TexturePtr& texptr)
	{
		_setTexturePtr(texptr, mCurrentFrame);
	}
	//-----------------------------------------------------------------------
	void TextureUnitState::_setTexturePtr(const TexturePtr& texptr, size_t frame)
	{
		assert(frame < mFramePtrs.size());
		mFramePtrs[frame] = texptr;
	}
    //-----------------------------------------------------------------------
	void TextureUnitState::ensurePrepared(size_t frame) const
	{
	}
    //-----------------------------------------------------------------------
	void TextureUnitState::ensureLoaded(size_t frame) const
	{
	}
    //-----------------------------------------------------------------------
	Real TextureUnitState::getTextureUScroll(void) const
    {
		return mUMod;
    }

	//-----------------------------------------------------------------------
	Real TextureUnitState::getTextureVScroll(void) const
    {
		return mVMod;
    }

	//-----------------------------------------------------------------------
	Real TextureUnitState::getTextureUScale(void) const
    {
		return mUScale;
    }

	//-----------------------------------------------------------------------
	Real TextureUnitState::getTextureVScale(void) const
    {
		return mVScale;
    }

	//-----------------------------------------------------------------------
	const Radian& TextureUnitState::getTextureRotate(void) const
    {
		return mRotate;
    }
	
	//-----------------------------------------------------------------------
	Real TextureUnitState::getAnimationDuration(void) const
	{
		return mAnimDuration;
	}

	//-----------------------------------------------------------------------
	const TextureUnitState::EffectMap& TextureUnitState::getEffects(void) const
	{
		return mEffects;
	}

	//-----------------------------------------------------------------------
	void TextureUnitState::setTextureFiltering(TextureFilterOptions filterType)
	{
        switch (filterType)
        {
        case TFO_NONE:
            setTextureFiltering(FO_POINT, FO_POINT, FO_NONE);
            break;
        case TFO_BILINEAR:
            setTextureFiltering(FO_LINEAR, FO_LINEAR, FO_POINT);
            break;
        case TFO_TRILINEAR:
            setTextureFiltering(FO_LINEAR, FO_LINEAR, FO_LINEAR);
            break;
        case TFO_ANISOTROPIC:
            setTextureFiltering(FO_ANISOTROPIC, FO_ANISOTROPIC, FO_LINEAR);
            break;
        }
        mIsDefaultFiltering = false;
	}
	//-----------------------------------------------------------------------
    void TextureUnitState::setTextureFiltering(FilterType ft, FilterOptions fo)
    {
        switch (ft)
        {
        case FT_MIN:
            mMinFilter = fo;
            break;
        case FT_MAG:
            mMagFilter = fo;
            break;
        case FT_MIP:
            mMipFilter = fo;
            break;
        }
        mIsDefaultFiltering = false;
    }
	//-----------------------------------------------------------------------
    void TextureUnitState::setTextureFiltering(FilterOptions minFilter, 
        FilterOptions magFilter, FilterOptions mipFilter)
    {
        mMinFilter = minFilter;
        mMagFilter = magFilter;
        mMipFilter = mipFilter;
        mIsDefaultFiltering = false;
    }
	//-----------------------------------------------------------------------
	FilterOptions TextureUnitState::getTextureFiltering(FilterType ft) const
	{
        switch (ft)
        {
        case FT_MIN:
            return mMinFilter;
        case FT_MAG:
            return mMagFilter;
        case FT_MIP:
            return mMipFilter;
        }
		// to keep compiler happy
		return mMinFilter;
	}

	//-----------------------------------------------------------------------
	void TextureUnitState::setTextureAnisotropy(unsigned int maxAniso)
	{
		mMaxAniso = maxAniso;
        mIsDefaultAniso = false;
	}
	//-----------------------------------------------------------------------
	unsigned int TextureUnitState::getTextureAnisotropy() const
	{
        return mMaxAniso;
	}

	//-----------------------------------------------------------------------
    void TextureUnitState::_unprepare(void)
    {
        // Unreference textures
        vector<TexturePtr>::type::iterator ti, tiend;
        tiend = mFramePtrs.end();
        for (ti = mFramePtrs.begin(); ti != tiend; ++ti)
        {
            (*ti) = nullptr;
        }
    }
	//-----------------------------------------------------------------------
    void TextureUnitState::_unload(void)
    {
        // Unreference but don't unload textures. may be used elsewhere
        vector<TexturePtr>::type::iterator ti, tiend;
        tiend = mFramePtrs.end();
        for (ti = mFramePtrs.begin(); ti != tiend; ++ti)
        {
            (*ti) = nullptr;
        }
    }
    //-----------------------------------------------------------------------------
    bool TextureUnitState::isLoaded(void) const
    {
        return true;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::_notifyNeedsRecompile(void)
    {

    }
    //-----------------------------------------------------------------------
    bool TextureUnitState::hasViewRelativeTextureCoordinateGeneration(void) const
    {
        // Right now this only returns true for reflection maps

        EffectMap::const_iterator i, iend;
        iend = mEffects.end();
        
        for(i = mEffects.find(ET_ENVIRONMENT_MAP); i != iend; ++i)
        {
            if (i->second.subtype == ENV_REFLECTION)
                return true;
        }
        for(i = mEffects.find(ET_PROJECTIVE_TEXTURE); i != iend; ++i)
        {
            return true;
        }

        return false;
    }
    //-----------------------------------------------------------------------
    void TextureUnitState::setName(const String& name)
    {
        mName = name;
		if (mTextureNameAlias.empty())
			mTextureNameAlias = mName;
    }

    //-----------------------------------------------------------------------
    void TextureUnitState::setTextureNameAlias(const String& name)
    {
        mTextureNameAlias = name;
    }

    //-----------------------------------------------------------------------
    bool TextureUnitState::applyTextureAliases(const AliasTextureNamePairList& aliasList, const bool apply)
    {
        bool testResult = false;
        // if TUS has an alias see if its in the alias container
        if (!mTextureNameAlias.empty())
        {
            AliasTextureNamePairList::const_iterator aliasEntry =
                aliasList.find(mTextureNameAlias);

            if (aliasEntry != aliasList.end())
            {
                // match was found so change the texture name in mFrames
                testResult = true;

                if (apply)
                {
                    // currently assumes animated frames are sequentially numbered
                    // cubic, 1d, 2d, and 3d textures are determined from current TUS state
                    
                    // if cubic or 3D
                    if (mCubic)
                    {
                        setCubicTextureName(aliasEntry->second, mTextureType == TEX_TYPE_CUBE_MAP);
                    }
                    else
                    {
                        // if more than one frame then assume animated frames
                        if (mFrames.size() > 1)
                            setAnimatedTextureName(aliasEntry->second, 
								static_cast<unsigned int>(mFrames.size()), mAnimDuration);
                        else
                            setTextureName(aliasEntry->second, mTextureType);
                    }
                }
                
            }
        }

        return testResult;
    }
	//-----------------------------------------------------------------------------
	void TextureUnitState::_notifyParent(Pass* parent)
	{
		mParent = parent;
	}
	//-----------------------------------------------------------------------------
	void TextureUnitState::setCompositorReference(const String& compositorName, const String& textureName, size_t mrtIndex)
	{  
		mCompositorRefName = compositorName; 
		mCompositorRefTexName = textureName; 
		mCompositorRefMrtIndex = mrtIndex; 
	}
}