/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_drawinglayer.hxx"

#include <drawinglayer/texture/texture.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/tools/gradienttools.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvx::GeoTexSvx()
		{
		}

		GeoTexSvx::~GeoTexSvx()
		{
		}

		bool GeoTexSvx::operator==(const GeoTexSvx& /*rGeoTexSvx*/) const
		{
			// default implementation says yes (no data -> no difference)
			return true;
		}

		void GeoTexSvx::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& /*rMatrices*/)
		{
			// default implementation does nothing
		}

		void GeoTexSvx::modifyBColor(const basegfx::B2DPoint& /*rUV*/, basegfx::BColor& rBColor, double& /*rfOpacity*/) const
		{
			// base implementation creates random color (for testing only, may also be pure virtual)
			rBColor.setRed((rand() & 0x7fff) / 32767.0);
			rBColor.setGreen((rand() & 0x7fff) / 32767.0);
			rBColor.setBlue((rand() & 0x7fff) / 32767.0);
		}

		void GeoTexSvx::modifyOpacity(const basegfx::B2DPoint& rUV, double& rfOpacity) const
		{
			// base implementation uses inverse of luminance of solved color (for testing only, may also be pure virtual)
			basegfx::BColor aBaseColor;
			modifyBColor(rUV, aBaseColor, rfOpacity);
			rfOpacity = 1.0 - aBaseColor.luminance();
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		void GeoTexSvxGradient::impAppendMatrix(::std::vector< basegfx::B2DHomMatrix >& rMatrices, const basegfx::B2DRange& rRange)
		{
			basegfx::B2DHomMatrix aNew;
			aNew.set(0, 0, rRange.getWidth());
			aNew.set(1, 1, rRange.getHeight());
			aNew.set(0, 2, rRange.getMinX());
			aNew.set(1, 2, rRange.getMinY());
			rMatrices.push_back(maGradientInfo.maTextureTransform * aNew);
		}

		void GeoTexSvxGradient::impAppendColorsRadial(::std::vector< basegfx::BColor >& rColors)
		{
			if(maGradientInfo.mnSteps)
			{
				rColors.push_back(maStart);

				for(sal_uInt32 a(1L); a < maGradientInfo.mnSteps - 1L; a++)
				{
					rColors.push_back(interpolate(maStart, maEnd, (double)a / (double)maGradientInfo.mnSteps));
				}

				rColors.push_back(maEnd);
			}
		}

		GeoTexSvxGradient::GeoTexSvxGradient(const basegfx::B2DRange& rTargetRange, const basegfx::BColor& rStart, const basegfx::BColor& rEnd, sal_uInt32 nSteps, double fBorder)
		:	maTargetRange(rTargetRange),
			maStart(rStart),
			maEnd(rEnd),
			mfBorder(fBorder)
		{
			maGradientInfo.mnSteps = nSteps;
			maGradientInfo.mfAspectRatio = 1.0;
		}

		GeoTexSvxGradient::~GeoTexSvxGradient()
		{
		}

		bool GeoTexSvxGradient::operator==(const GeoTexSvx& rGeoTexSvx) const
		{
			const GeoTexSvxGradient* pCompare = dynamic_cast< const GeoTexSvxGradient* >(&rGeoTexSvx);
			return (pCompare
				&& maGradientInfo.maTextureTransform == pCompare->maGradientInfo.maTextureTransform
				&& maTargetRange == pCompare->maTargetRange
				&& maGradientInfo.mnSteps == pCompare->maGradientInfo.mnSteps
				&& maGradientInfo.mfAspectRatio == pCompare->maGradientInfo.mfAspectRatio
				&& mfBorder == pCompare->mfBorder);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxGradientLinear::GeoTexSvxGradientLinear(const basegfx::B2DRange& rTargetRange, const basegfx::BColor& rStart, const basegfx::BColor& rEnd, sal_uInt32 nSteps, double fBorder, double fAngle)
		:	GeoTexSvxGradient(rTargetRange, rStart, rEnd, nSteps, fBorder)
		{
            basegfx::tools::createLinearODFGradientInfo(maGradientInfo,
                                                        rTargetRange,
                                                        nSteps,
                                                        fBorder,
                                                        fAngle);
		}

		GeoTexSvxGradientLinear::~GeoTexSvxGradientLinear()
		{
		}

		void GeoTexSvxGradientLinear::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			if(maGradientInfo.mnSteps)
			{
				const double fStripeWidth(1.0 / maGradientInfo.mnSteps);
				for(sal_uInt32 a(1L); a < maGradientInfo.mnSteps; a++)
				{
					const basegfx::B2DRange aRect(0.0, fStripeWidth * a, 1.0, 1.0);
					impAppendMatrix(rMatrices, aRect);
				}
			}
		}

		void GeoTexSvxGradientLinear::appendColors(::std::vector< basegfx::BColor >& rColors)
		{
			if(maGradientInfo.mnSteps)
			{
				rColors.push_back(maStart);

				for(sal_uInt32 a(1L); a < maGradientInfo.mnSteps; a++)
				{
					rColors.push_back(interpolate(maStart, maEnd, (double)a / (double)(maGradientInfo.mnSteps + 1L)));
				}
			}
		}

		void GeoTexSvxGradientLinear::modifyBColor(const basegfx::B2DPoint& rUV, basegfx::BColor& rBColor, double& /*rfOpacity*/) const
		{
            const double fScaler(basegfx::tools::getLinearGradientAlpha(rUV, maGradientInfo));

			rBColor = (maStart * (1.0 - fScaler)) + (maEnd * fScaler);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxGradientAxial::GeoTexSvxGradientAxial(const basegfx::B2DRange& rTargetRange, const basegfx::BColor& rStart, const basegfx::BColor& rEnd, sal_uInt32 nSteps, double fBorder, double fAngle)
		:	GeoTexSvxGradient(rTargetRange, rStart, rEnd, nSteps, fBorder)
		{
            basegfx::tools::createAxialODFGradientInfo(maGradientInfo,
                                                       rTargetRange,
                                                       nSteps,
                                                       fBorder,
                                                       fAngle);
		}

		GeoTexSvxGradientAxial::~GeoTexSvxGradientAxial()
		{
		}

		void GeoTexSvxGradientAxial::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			if(maGradientInfo.mnSteps)
			{
				const double fStripeWidth=1.0 / (maGradientInfo.mnSteps - 1L);
				for(sal_uInt32 a(maGradientInfo.mnSteps-1L); a != 0; a--)
				{
					const basegfx::B2DRange aRect(0, 0, 1.0, fStripeWidth * a);
					impAppendMatrix(rMatrices, aRect);
				}
			}
		}

		void GeoTexSvxGradientAxial::appendColors(::std::vector< basegfx::BColor >& rColors)
		{
			if(maGradientInfo.mnSteps)
			{
				rColors.push_back(maEnd);

				for(sal_uInt32 a(1L); a < maGradientInfo.mnSteps; a++)
				{
					rColors.push_back(interpolate(maEnd, maStart, (double)a / (double)maGradientInfo.mnSteps));
				}
			}
		}

		void GeoTexSvxGradientAxial::modifyBColor(const basegfx::B2DPoint& rUV, basegfx::BColor& rBColor, double& /*rfOpacity*/) const
		{
            const double fScaler(basegfx::tools::getAxialGradientAlpha(rUV, maGradientInfo));

			rBColor = (maStart * (1.0 - fScaler)) + (maEnd * fScaler);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxGradientRadial::GeoTexSvxGradientRadial(const basegfx::B2DRange& rTargetRange, const basegfx::BColor& rStart, const basegfx::BColor& rEnd, sal_uInt32 nSteps, double fBorder, double fOffsetX, double fOffsetY)
		:	GeoTexSvxGradient(rTargetRange, rStart, rEnd, nSteps, fBorder)
		{
            basegfx::tools::createRadialODFGradientInfo(maGradientInfo,
                                                        rTargetRange,
                                                        basegfx::B2DVector(fOffsetX,fOffsetY),
                                                        nSteps,
                                                        fBorder);
		}

		GeoTexSvxGradientRadial::~GeoTexSvxGradientRadial()
		{
		}

		void GeoTexSvxGradientRadial::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			if(maGradientInfo.mnSteps)
			{
				const double fStepSize=1.0 / maGradientInfo.mnSteps;
				for(sal_uInt32 a(maGradientInfo.mnSteps-1L); a > 0; a--)
				{
					const basegfx::B2DRange aRect(0, 0, fStepSize*a, fStepSize*a);
					impAppendMatrix(rMatrices, aRect);
				}
			}
		}

		void GeoTexSvxGradientRadial::appendColors(::std::vector< basegfx::BColor >& rColors)
		{
			impAppendColorsRadial(rColors);
		}

		void GeoTexSvxGradientRadial::modifyBColor(const basegfx::B2DPoint& rUV, basegfx::BColor& rBColor, double& /*rfOpacity*/) const
		{
            const double fScaler(basegfx::tools::getRadialGradientAlpha(rUV, maGradientInfo));

			rBColor = (maStart * (1.0 - fScaler)) + (maEnd * fScaler);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxGradientElliptical::GeoTexSvxGradientElliptical(const basegfx::B2DRange& rTargetRange, const basegfx::BColor& rStart, const basegfx::BColor& rEnd, sal_uInt32 nSteps, double fBorder, double fOffsetX, double fOffsetY, double fAngle)
		:	GeoTexSvxGradient(rTargetRange, rStart, rEnd, nSteps, fBorder)
		{
            basegfx::tools::createEllipticalODFGradientInfo(maGradientInfo,
                                                            rTargetRange,
                                                            basegfx::B2DVector(fOffsetX,fOffsetY),
                                                            nSteps,
                                                            fBorder,
                                                            fAngle);
		}

		GeoTexSvxGradientElliptical::~GeoTexSvxGradientElliptical()
		{
		}

		void GeoTexSvxGradientElliptical::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			if(maGradientInfo.mnSteps)
			{
				double fWidth(1);
				double fHeight(1);
				double fIncrementX, fIncrementY;

				if(maGradientInfo.mfAspectRatio > 1.0)
				{
					fIncrementY = fHeight / maGradientInfo.mnSteps;
					fIncrementX = fIncrementY / maGradientInfo.mfAspectRatio;
				}
				else
				{
					fIncrementX = fWidth / maGradientInfo.mnSteps;
					fIncrementY = fIncrementX * maGradientInfo.mfAspectRatio;
				}

				for(sal_uInt32 a(1L); a < maGradientInfo.mnSteps; a++)
				{
					// next step
					fWidth  -= fIncrementX;
					fHeight -= fIncrementY;

					// create matrix
					const basegfx::B2DRange aRect(0, 0, fWidth, fHeight);
					impAppendMatrix(rMatrices, aRect);
				}
			}
		}

		void GeoTexSvxGradientElliptical::appendColors(::std::vector< basegfx::BColor >& rColors)
		{
			impAppendColorsRadial(rColors);
		}

		void GeoTexSvxGradientElliptical::modifyBColor(const basegfx::B2DPoint& rUV, basegfx::BColor& rBColor, double& /*rfOpacity*/) const
		{
            const double fScaler(basegfx::tools::getEllipticalGradientAlpha(rUV, maGradientInfo));

			rBColor = (maStart * (1.0 - fScaler)) + (maEnd * fScaler);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxGradientSquare::GeoTexSvxGradientSquare(const basegfx::B2DRange& rTargetRange, const basegfx::BColor& rStart, const basegfx::BColor& rEnd, sal_uInt32 nSteps, double fBorder, double fOffsetX, double fOffsetY, double fAngle)
		:	GeoTexSvxGradient(rTargetRange, rStart, rEnd, nSteps, fBorder)
		{
            basegfx::tools::createSquareODFGradientInfo(maGradientInfo,
                                                        rTargetRange,
                                                        basegfx::B2DVector(fOffsetX,fOffsetY),
                                                        nSteps,
                                                        fBorder,
                                                        fAngle);
		}

		GeoTexSvxGradientSquare::~GeoTexSvxGradientSquare()
		{
		}

		void GeoTexSvxGradientSquare::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			if(maGradientInfo.mnSteps)
			{
				const double fStepSize=1.0 / maGradientInfo.mnSteps;
				for(sal_uInt32 a(maGradientInfo.mnSteps-1L); a > 0; a--)
				{
					const basegfx::B2DRange aRect(0, 0, fStepSize*a, fStepSize*a);
					impAppendMatrix(rMatrices, aRect);
				}
			}
		}

		void GeoTexSvxGradientSquare::appendColors(::std::vector< basegfx::BColor >& rColors)
		{
			impAppendColorsRadial(rColors);
		}

		void GeoTexSvxGradientSquare::modifyBColor(const basegfx::B2DPoint& rUV, basegfx::BColor& rBColor, double& /*rfOpacity*/) const
		{
            const double fScaler(basegfx::tools::getSquareGradientAlpha(rUV, maGradientInfo));

			rBColor = (maStart * (1.0 - fScaler)) + (maEnd * fScaler);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxGradientRect::GeoTexSvxGradientRect(const basegfx::B2DRange& rTargetRange, const basegfx::BColor& rStart, const basegfx::BColor& rEnd, sal_uInt32 nSteps, double fBorder, double fOffsetX, double fOffsetY, double fAngle)
		:	GeoTexSvxGradient(rTargetRange, rStart, rEnd, nSteps, fBorder)
		{
            basegfx::tools::createRectangularODFGradientInfo(maGradientInfo,
                                                             rTargetRange,
                                                             basegfx::B2DVector(fOffsetX,fOffsetY),
                                                             nSteps,
                                                             fBorder,
                                                             fAngle);
		}

		GeoTexSvxGradientRect::~GeoTexSvxGradientRect()
		{
		}

		void GeoTexSvxGradientRect::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			if(maGradientInfo.mnSteps)
			{
				double fWidth(1);
				double fHeight(1);
				double fIncrementX, fIncrementY;

				if(maGradientInfo.mfAspectRatio > 1.0)
				{
					fIncrementY = fHeight / maGradientInfo.mnSteps;
					fIncrementX = fIncrementY / maGradientInfo.mfAspectRatio;
				}
				else
				{
					fIncrementX = fWidth / maGradientInfo.mnSteps;
					fIncrementY = fIncrementX * maGradientInfo.mfAspectRatio;
				}

				for(sal_uInt32 a(1L); a < maGradientInfo.mnSteps; a++)
				{
					// next step
					fWidth  -= fIncrementX;
					fHeight -= fIncrementY;

					// create matrix
					const basegfx::B2DRange aRect(0, 0, fWidth, fHeight);
					impAppendMatrix(rMatrices, aRect);
				}
			}
		}

		void GeoTexSvxGradientRect::appendColors(::std::vector< basegfx::BColor >& rColors)
		{
			impAppendColorsRadial(rColors);
		}

		void GeoTexSvxGradientRect::modifyBColor(const basegfx::B2DPoint& rUV, basegfx::BColor& rBColor, double& /*rfOpacity*/) const
		{
            const double fScaler(basegfx::tools::getRectangularGradientAlpha(rUV, maGradientInfo));

			rBColor = (maStart * (1.0 - fScaler)) + (maEnd * fScaler);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxHatch::GeoTexSvxHatch(const basegfx::B2DRange& rTargetRange, double fDistance, double fAngle)
		:	mfDistance(0.1),
			mfAngle(fAngle),
			mnSteps(10L)
		{
			double fTargetSizeX(rTargetRange.getWidth());
			double fTargetSizeY(rTargetRange.getHeight());
			double fTargetOffsetX(rTargetRange.getMinX());
			double fTargetOffsetY(rTargetRange.getMinY());

            fAngle = -fAngle;

			// add object expansion
			if(0.0 != fAngle)
			{
				const double fAbsCos(fabs(cos(fAngle)));
				const double fAbsSin(fabs(sin(fAngle)));
				const double fNewX(fTargetSizeX * fAbsCos + fTargetSizeY * fAbsSin);
				const double fNewY(fTargetSizeY * fAbsCos + fTargetSizeX * fAbsSin);
				fTargetOffsetX -= (fNewX - fTargetSizeX) / 2.0;
				fTargetOffsetY -= (fNewY - fTargetSizeY) / 2.0;
				fTargetSizeX = fNewX;
				fTargetSizeY = fNewY;
			}

			// add object scale before rotate
			maTextureTransform.scale(fTargetSizeX, fTargetSizeY);

			// add texture rotate after scale to keep perpendicular angles
			if(0.0 != fAngle)
			{
				basegfx::B2DPoint aCenter(0.5, 0.5);
				aCenter *= maTextureTransform;

                maTextureTransform = basegfx::tools::createRotateAroundPoint(aCenter, fAngle)
                    * maTextureTransform;
			}

			// add object translate
			maTextureTransform.translate(fTargetOffsetX, fTargetOffsetY);

			// prepare height for texture
			const double fSteps((0.0 != fDistance) ? fTargetSizeY / fDistance : 10.0);
			mnSteps = basegfx::fround(fSteps + 0.5);
			mfDistance = 1.0 / fSteps;

			// build transform from u,v to [0.0 .. 1.0]. As base, use inverse texture transform
			maBackTextureTransform = maTextureTransform;
			maBackTextureTransform.invert();
		}

		GeoTexSvxHatch::~GeoTexSvxHatch()
		{
		}

		bool GeoTexSvxHatch::operator==(const GeoTexSvx& rGeoTexSvx) const
		{
			const GeoTexSvxHatch* pCompare = dynamic_cast< const GeoTexSvxHatch* >(&rGeoTexSvx);
			return (pCompare
				&& maTextureTransform == pCompare->maTextureTransform
				&& mfDistance == pCompare->mfDistance
				&& mfAngle == pCompare->mfAngle
				&& mnSteps == pCompare->mnSteps);
		}

		void GeoTexSvxHatch::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			for(sal_uInt32 a(1L); a < mnSteps; a++)
			{
				// create matrix
				const double fOffset(mfDistance * (double)a);
				basegfx::B2DHomMatrix aNew;
				aNew.set(1, 2, fOffset);
				rMatrices.push_back(maTextureTransform * aNew);
			}
		}

		double GeoTexSvxHatch::getDistanceToHatch(const basegfx::B2DPoint& rUV) const
		{
			const basegfx::B2DPoint aCoor(maBackTextureTransform * rUV);
			return fmod(aCoor.getY(), mfDistance);
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
	namespace texture
	{
		GeoTexSvxTiled::GeoTexSvxTiled(const basegfx::B2DPoint& rTopLeft, const basegfx::B2DVector& rSize)
		:	maTopLeft(rTopLeft),
			maSize(rSize)
		{
			if(basegfx::fTools::lessOrEqual(maSize.getX(), 0.0))
			{
				maSize.setX(1.0);
			}

			if(basegfx::fTools::lessOrEqual(maSize.getY(), 0.0))
			{
				maSize.setY(1.0);
			}
		}

		GeoTexSvxTiled::~GeoTexSvxTiled()
		{
		}

		bool GeoTexSvxTiled::operator==(const GeoTexSvx& rGeoTexSvx) const
		{
			const GeoTexSvxTiled* pCompare = dynamic_cast< const GeoTexSvxTiled* >(&rGeoTexSvx);
			return (pCompare
				&& maTopLeft == pCompare->maTopLeft
				&& maSize == pCompare->maSize);
		}

		void GeoTexSvxTiled::appendTransformations(::std::vector< basegfx::B2DHomMatrix >& rMatrices)
		{
			double fStartX(maTopLeft.getX());
			double fStartY(maTopLeft.getY());

			if(basegfx::fTools::more(fStartX, 0.0))
			{
				fStartX -= (floor(fStartX / maSize.getX()) + 1.0) * maSize.getX();
			}

			if(basegfx::fTools::less(fStartX + maSize.getX(), 0.0))
			{
				fStartX += floor(-fStartX / maSize.getX()) * maSize.getX();
			}

			if(basegfx::fTools::more(fStartY, 0.0))
			{
				fStartY -= (floor(fStartY / maSize.getY()) + 1.0) * maSize.getY();
			}

			if(basegfx::fTools::less(fStartY + maSize.getY(), 0.0))
			{
				fStartY += floor(-fStartY / maSize.getY()) * maSize.getY();
			}

			for(double fPosY(fStartY); basegfx::fTools::less(fPosY, 1.0); fPosY += maSize.getY())
			{
				for(double fPosX(fStartX); basegfx::fTools::less(fPosX, 1.0); fPosX += maSize.getX())
				{
					basegfx::B2DHomMatrix aNew;

					aNew.set(0, 0, maSize.getX());
					aNew.set(1, 1, maSize.getY());
					aNew.set(0, 2, fPosX);
					aNew.set(1, 2, fPosY);

					rMatrices.push_back(aNew);
				}
			}
		}
	} // end of namespace texture
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////
// eof
