/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: fillgradientprimitive2d.cxx,v $
 *
 *  $Revision: 1.6 $
 *
 *  last change: $Author: aw $ $Date: 2008-05-27 14:11:20 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library 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 for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

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

#include <drawinglayer/primitive2d/fillgradientprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <drawinglayer/texture/texture.hxx>
#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
#include <basegfx/tools/canvastools.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>

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

using namespace com::sun::star;

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

namespace drawinglayer
{
    namespace primitive2d
    {
        Primitive2DSequence FillGradientPrimitive2D::createLocalDecomposition(const geometry::ViewInformation2D& /*rViewInformation*/) const
        {
            const attribute::GradientStyle aGradientStyle(maFillGradient.getStyle());
            ::std::vector< basegfx::B2DHomMatrix > aMatrices;
            ::std::vector< basegfx::BColor > aColors;
            basegfx::B2DPolygon aUnitPolygon;
            sal_uInt32 nSteps(maFillGradient.getSteps());

            if(attribute::GRADIENTSTYLE_RADIAL == aGradientStyle || attribute::GRADIENTSTYLE_ELLIPTICAL == aGradientStyle)
            {
                const basegfx::B2DPoint aCircleCenter(0.5, 0.5);
                aUnitPolygon = basegfx::tools::createPolygonFromEllipse(aCircleCenter, 0.5, 0.5);
            }
            else
            {
                aUnitPolygon = basegfx::tools::createPolygonFromRect(basegfx::B2DRange(0.0, 0.0, 1.0, 1.0));
            }

            // make sure steps is not too high/low
            const basegfx::BColor aStart(maFillGradient.getStartColor());
            const basegfx::BColor aEnd(maFillGradient.getEndColor());
            const sal_uInt32 nMaxSteps(sal_uInt32((aStart.getMaximumDistance(aEnd) * 127.5) + 0.5));

            if(nSteps == 0L)
            {
                nSteps = nMaxSteps;
            }

            if(nSteps < 2L)
            {
                nSteps = 2L;
            }

            if(nSteps > nMaxSteps)
            {
                nSteps = nMaxSteps;
            }

            switch(aGradientStyle)
            {
                case attribute::GRADIENTSTYLE_LINEAR:
                {
                    texture::GeoTexSvxGradientLinear aGradient(getObjectRange(), aStart, aEnd, nSteps, maFillGradient.getBorder(), -maFillGradient.getAngle());
                    aGradient.appendTransformations(aMatrices);
                    aGradient.appendColors(aColors);
                    break;
                }
                case attribute::GRADIENTSTYLE_AXIAL:
                {
                    texture::GeoTexSvxGradientAxial aGradient(getObjectRange(), aStart, aEnd, nSteps, maFillGradient.getBorder(), -maFillGradient.getAngle());
                    aGradient.appendTransformations(aMatrices);
                    aGradient.appendColors(aColors);
                    break;
                }
                case attribute::GRADIENTSTYLE_RADIAL:
                {
                    texture::GeoTexSvxGradientRadial aGradient(getObjectRange(), aStart, aEnd, nSteps, maFillGradient.getBorder(), maFillGradient.getOffsetX(), maFillGradient.getOffsetY());
                    aGradient.appendTransformations(aMatrices);
                    aGradient.appendColors(aColors);
                    break;
                }
                case attribute::GRADIENTSTYLE_ELLIPTICAL:
                {
                    texture::GeoTexSvxGradientElliptical aGradient(getObjectRange(), aStart, aEnd, nSteps, maFillGradient.getBorder(), maFillGradient.getOffsetX(), maFillGradient.getOffsetY(), -maFillGradient.getAngle());
                    aGradient.appendTransformations(aMatrices);
                    aGradient.appendColors(aColors);
                    break;
                }
                case attribute::GRADIENTSTYLE_SQUARE:
                {
                    texture::GeoTexSvxGradientSquare aGradient(getObjectRange(), aStart, aEnd, nSteps, maFillGradient.getBorder(), maFillGradient.getOffsetX(), maFillGradient.getOffsetY(), -maFillGradient.getAngle());
                    aGradient.appendTransformations(aMatrices);
                    aGradient.appendColors(aColors);
                    break;
                }
                case attribute::GRADIENTSTYLE_RECT:
                {
                    texture::GeoTexSvxGradientRect aGradient(getObjectRange(), aStart, aEnd, nSteps, maFillGradient.getBorder(), maFillGradient.getOffsetX(), maFillGradient.getOffsetY(), -maFillGradient.getAngle());
                    aGradient.appendTransformations(aMatrices);
                    aGradient.appendColors(aColors);
                    break;
                }
            }

            // prepare return value
            Primitive2DSequence aRetval(aColors.size() ? aMatrices.size() + 1L : aMatrices.size());

            // create solid fill with start color
            if(aColors.size())
            {
                // create primitive
                const Primitive2DReference xRef(new PolyPolygonColorPrimitive2D(basegfx::B2DPolyPolygon(basegfx::tools::createPolygonFromRect(getObjectRange())), aColors[0L]));
                aRetval[0L] = xRef;
            }

            // create solid fill steps
            for(sal_uInt32 a(0L); a < aMatrices.size(); a++)
            {
                // create part polygon
                basegfx::B2DPolygon aNewPoly(aUnitPolygon);
                aNewPoly.transform(aMatrices[a]);

                // create solid fill
                const Primitive2DReference xRef(new PolyPolygonColorPrimitive2D(basegfx::B2DPolyPolygon(aNewPoly), aColors[a + 1L]));
                aRetval[a + 1L] = xRef;
            }

            return aRetval;
        }

        FillGradientPrimitive2D::FillGradientPrimitive2D(
            const basegfx::B2DRange& rObjectRange,
            const attribute::FillGradientAttribute& rFillGradient)
        :   BasePrimitive2D(),
            maObjectRange(rObjectRange),
            maFillGradient(rFillGradient)
        {
        }

        bool FillGradientPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
        {
            if(BasePrimitive2D::operator==(rPrimitive))
            {
                const FillGradientPrimitive2D& rCompare = (FillGradientPrimitive2D&)rPrimitive;

                return (getObjectRange() == rCompare.getObjectRange()
                    && maFillGradient == rCompare.maFillGradient);
            }

            return false;
        }

        basegfx::B2DRange FillGradientPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation*/) const
        {
            // return ObjectRange
            return getObjectRange();
        }

        // provide unique ID
        ImplPrimitrive2DIDBlock(FillGradientPrimitive2D, PRIMITIVE2D_ID_FILLGRADIENTPRIMITIVE2D)

    } // end of namespace primitive2d
} // end of namespace drawinglayer

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