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path: root/drawinglayer/source/primitive2d/patternfillprimitive2d.cxx
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <drawinglayer/primitive2d/patternfillprimitive2d.hxx>
#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
#include <drawinglayer/primitive2d/bitmapprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <drawinglayer/texture/texture.hxx>
#include <drawinglayer/primitive2d/maskprimitive2d.hxx>
#include <drawinglayer/tools/converters.hxx>
#include <drawinglayer/geometry/viewinformation2d.hxx>

using namespace com::sun::star;

#define MAXIMUM_SQUARE_LENGTH (186.0)
#define MINIMUM_SQUARE_LENGTH (16.0)
#define MINIMUM_TILES_LENGTH (3)

namespace drawinglayer
{
    namespace primitive2d
    {
        void PatternFillPrimitive2D::calculateNeededDiscreteBufferSize(
            sal_uInt32& rWidth,
            sal_uInt32& rHeight,
            const geometry::ViewInformation2D& rViewInformation) const
        {
            // reset parameters
            rWidth = rHeight = 0;

            // check if resolution is in the range which may be buffered
            const basegfx::B2DPolyPolygon& rMaskPolygon = getMask();
            const basegfx::B2DRange aMaskRange(rMaskPolygon.getB2DRange());

            // get discrete rounded up square size of a single tile
            const basegfx::B2DHomMatrix aMaskRangeTransformation(
                basegfx::tools::createScaleTranslateB2DHomMatrix(
                    aMaskRange.getRange(),
                    aMaskRange.getMinimum()));
            const basegfx::B2DHomMatrix aTransform(
                rViewInformation.getObjectToViewTransformation() * aMaskRangeTransformation);
            const basegfx::B2DPoint aTopLeft(aTransform * getReferenceRange().getMinimum());
            const basegfx::B2DPoint aX(aTransform * basegfx::B2DPoint(getReferenceRange().getMaxX(), getReferenceRange().getMinY()));
            const basegfx::B2DPoint aY(aTransform * basegfx::B2DPoint(getReferenceRange().getMinX(), getReferenceRange().getMaxY()));
            const double fW(basegfx::B2DVector(aX - aTopLeft).getLength());
            const double fH(basegfx::B2DVector(aY - aTopLeft).getLength());
            const double fSquare(fW * fH);

            if(fSquare > 0.0)
            {
                // check if less than a maximum square pixels is used
                static sal_uInt32 fMaximumSquare(MAXIMUM_SQUARE_LENGTH * MAXIMUM_SQUARE_LENGTH);

                if(fSquare < fMaximumSquare)
                {
                    // calculate needed number of tiles and check if used more than a minimum count
                    const texture::GeoTexSvxTiled aTiling(getReferenceRange());
                    const sal_uInt32 nTiles(aTiling.getNumberOfTiles());
                    static sal_uInt32 nMinimumTiles(MINIMUM_TILES_LENGTH * MINIMUM_TILES_LENGTH);

                    if(nTiles >= nMinimumTiles)
                    {
                        rWidth = basegfx::fround(ceil(fW));
                        rHeight = basegfx::fround(ceil(fH));
                        static sal_uInt32 fMinimumSquare(MINIMUM_SQUARE_LENGTH * MINIMUM_SQUARE_LENGTH);

                        if(fSquare < fMinimumSquare)
                        {
                            const double fRel(fW/fH);
                            rWidth = basegfx::fround(sqrt(fMinimumSquare * fRel));
                            rHeight = basegfx::fround(sqrt(fMinimumSquare / fRel));
                        }
                    }
                }
            }
        }

        Primitive2DContainer PatternFillPrimitive2D::createContent(const geometry::ViewInformation2D& rViewInformation) const
        {
            Primitive2DContainer aContent;

            // see if buffering is wanted. it is wanted, create buffered content in given resolution
            if(0 != mnDiscreteWidth && 0 != mnDiscreteHeight)
            {
                const geometry::ViewInformation2D aViewInformation2D;
                const primitive2d::Primitive2DReference xEmbedRef(
                    new primitive2d::TransformPrimitive2D(
                        basegfx::tools::createScaleB2DHomMatrix(mnDiscreteWidth, mnDiscreteHeight),
                        getChildren()));
                const primitive2d::Primitive2DContainer xEmbedSeq { xEmbedRef };

                const BitmapEx aBitmapEx(
                    tools::convertToBitmapEx(
                        xEmbedSeq,
                        aViewInformation2D,
                        mnDiscreteWidth,
                        mnDiscreteHeight,
                        mnDiscreteWidth * mnDiscreteHeight));

                if(!aBitmapEx.IsEmpty())
                {
                    const Size& rBmpPix = aBitmapEx.GetSizePixel();

                    if(rBmpPix.Width() > 0 && rBmpPix.Height() > 0)
                    {
                        const primitive2d::Primitive2DReference xEmbedRefBitmap(
                            new primitive2d::BitmapPrimitive2D(
                                aBitmapEx,
                                basegfx::B2DHomMatrix()));
                        aContent = primitive2d::Primitive2DContainer { xEmbedRefBitmap };
                    }
                }
            }

            if(aContent.empty())
            {
                // buffering was not tried or did fail - reset remembered buffered size
                // in any case
                PatternFillPrimitive2D* pThat = const_cast< PatternFillPrimitive2D* >(this);
                pThat->mnDiscreteWidth = pThat->mnDiscreteHeight = 0;

                // use children as default context
                aContent = getChildren();

                // check if content needs to be clipped
                const basegfx::B2DRange aUnitRange(0.0, 0.0, 1.0, 1.0);
                const basegfx::B2DRange aContentRange(getChildren().getB2DRange(rViewInformation));

                if(!aUnitRange.isInside(aContentRange))
                {
                    const Primitive2DReference xRef(
                        new MaskPrimitive2D(
                            basegfx::B2DPolyPolygon(basegfx::tools::createPolygonFromRect(aUnitRange)),
                            aContent));

                    aContent = Primitive2DContainer { xRef };
                }
            }

            return aContent;
        }

        void PatternFillPrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const
        {
            Primitive2DContainer aRetval;

            if(!getChildren().empty())
            {
                if(!getReferenceRange().isEmpty() && getReferenceRange().getWidth() > 0.0 && getReferenceRange().getHeight() > 0.0)
                {
                    const basegfx::B2DRange aMaskRange(getMask().getB2DRange());

                    if(!aMaskRange.isEmpty() && aMaskRange.getWidth() > 0.0 && aMaskRange.getHeight() > 0.0)
                    {
                        // create tiling matrices
                        ::std::vector< basegfx::B2DHomMatrix > aMatrices;
                        texture::GeoTexSvxTiled aTiling(getReferenceRange());

                        aTiling.appendTransformations(aMatrices);

                        // create content
                        const Primitive2DContainer aContent(createContent(rViewInformation));

                        // resize result
                        aRetval.resize(aMatrices.size());

                        // create one primitive for each matrix
                        for(size_t a(0); a < aMatrices.size(); a++)
                        {
                            aRetval[a] = new TransformPrimitive2D(
                                aMatrices[a],
                                aContent);
                        }

                        // transform result which is in unit coordinates to mask's object coordinates
                        {
                            const basegfx::B2DHomMatrix aMaskTransform(
                                basegfx::tools::createScaleTranslateB2DHomMatrix(
                                    aMaskRange.getRange(),
                                    aMaskRange.getMinimum()));

                            const Primitive2DReference xRef(
                                new TransformPrimitive2D(
                                    aMaskTransform,
                                    aRetval));

                            aRetval = Primitive2DContainer { xRef };
                        }

                        // embed result in mask
                        {
                            rContainer.push_back(
                                new MaskPrimitive2D(
                                    getMask(),
                                    aRetval));
                        }

                    }
                }
            }
        }

        PatternFillPrimitive2D::PatternFillPrimitive2D(
            const basegfx::B2DPolyPolygon& rMask,
            const Primitive2DContainer& rChildren,
            const basegfx::B2DRange& rReferenceRange)
        :   BufferedDecompositionPrimitive2D(),
            maMask(rMask),
            maChildren(rChildren),
            maReferenceRange(rReferenceRange),
            mnDiscreteWidth(0),
            mnDiscreteHeight(0)
        {
        }

        bool PatternFillPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
        {
            if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
            {
                const PatternFillPrimitive2D& rCompare = static_cast< const PatternFillPrimitive2D& >(rPrimitive);

                return (getMask() == rCompare.getMask()
                    && getChildren() == rCompare.getChildren()
                    && getReferenceRange() == rCompare.getReferenceRange());
            }

            return false;
        }

        basegfx::B2DRange PatternFillPrimitive2D::getB2DRange(const geometry::ViewInformation2D& /* rViewInformation */ ) const
        {
            return getMask().getB2DRange();
        }

        void PatternFillPrimitive2D::get2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const
        {
            // The existing bufferd decomposition uses a buffer in the remembered
            // size or none if sizes are zero. Get new needed sizes which depend on
            // the given ViewInformation
            bool bResetBuffering = false;
            sal_uInt32 nW(0);
            sal_uInt32 nH(0);
            calculateNeededDiscreteBufferSize(nW, nH, rViewInformation);
            const bool bBufferingCurrentlyUsed(0 != mnDiscreteWidth && 0 != mnDiscreteHeight);
            const bool bBufferingNextUsed(0 != nW && 0 != nH);

            if(bBufferingNextUsed)
            {
                // buffering is now possible
                if(bBufferingCurrentlyUsed)
                {
                    if(nW > mnDiscreteWidth || nH > mnDiscreteHeight)
                    {
                        // Higher resolution is needed than used in the existing buffered
                        // decomposition - create new one
                        bResetBuffering = true;
                    }
                    else if(double(nW * nH) / double(mnDiscreteWidth * mnDiscreteHeight) <= 0.5)
                    {
                        // Size has shrunk for 50% or more - it's worth to refresh the buffering
                        // to spare some resources
                        bResetBuffering = true;
                    }
                }
                else
                {
                    // currently no buffering used - reset evtl. unbuffered
                    // decomposition to start buffering
                    bResetBuffering = true;
                }
            }
            else
            {
                // buffering is no longer possible
                if(bBufferingCurrentlyUsed)
                {
                    // reset decomposition to allow creation of unbuffered one
                    bResetBuffering = true;
                }
            }

            if(bResetBuffering)
            {
                PatternFillPrimitive2D* pThat = const_cast< PatternFillPrimitive2D* >(this);
                pThat->mnDiscreteWidth = nW;
                pThat->mnDiscreteHeight = nH;
                pThat->setBuffered2DDecomposition(Primitive2DContainer());
            }

            // call parent
            BufferedDecompositionPrimitive2D::get2DDecomposition(rContainer, rViewInformation);
        }

        sal_Int64 SAL_CALL PatternFillPrimitive2D::estimateUsage()
            throw (css::uno::RuntimeException)
        {
            size_t nRet(0);
            for (auto& it : getChildren())
            {
                uno::Reference<util::XAccounting> const xAcc(it, uno::UNO_QUERY);
                if (xAcc.is())
                {
                    nRet += xAcc->estimateUsage();
                }
            }
            return nRet;
        }

        // provide unique ID
        ImplPrimitive2DIDBlock(PatternFillPrimitive2D, PRIMITIVE2D_ID_PATTERNFILLPRIMITIVE2D)

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

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */