/* -*- 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 <com/sun/star/rendering/PathCapType.hpp>
#include <com/sun/star/rendering/PathJoinType.hpp>
#include <com/sun/star/rendering/TexturingMode.hpp>
#include <com/sun/star/rendering/XCanvas.hpp>
#include <basegfx/utils/canvastools.hxx>
#include <basegfx/utils/gradienttools.hxx>
#include <basegfx/utils/tools.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/vector/b2dsize.hxx>
#include <basegfx/range/b2drange.hxx>
#include <basegfx/range/b2drectangle.hxx>
#include <basegfx/polygon/b2dlinegeometry.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <sal/log.hxx>
#include <vcl/canvastools.hxx>
#include <implrenderer.hxx>
#include "emfppath.hxx"

using namespace ::com::sun::star;
using namespace ::basegfx;

namespace cppcanvas
{
    namespace internal
    {
        EMFPPath::EMFPPath (sal_Int32 _nPoints, bool bLines)
        {
            if( _nPoints<0 || sal_uInt32(_nPoints)>SAL_MAX_INT32/(2*sizeof(float)) )
                _nPoints = SAL_MAX_INT32/(2*sizeof(float));
            nPoints = _nPoints;
            pPoints.reset( new float [nPoints*2] );
            if (!bLines)
                pPointTypes.reset( new sal_uInt8 [_nPoints] );
        }

        EMFPPath::~EMFPPath ()
        {
        }

        // TODO: remove rR argument when debug code is no longer needed
        void EMFPPath::Read (SvStream& s, sal_uInt32 pathFlags, ImplRenderer const & rR)
        {
            for (int i = 0; i < nPoints; i ++) {
                if (pathFlags & 0x800) {
                    // EMFPlusPointR: points are stored in EMFPlusInteger7 or
                    // EMFPlusInteger15 objects, see section 2.2.2.21/22
                    // If 0x800 bit is set, the 0x4000 bit is undefined and must be ignored
                    SAL_WARN("cppcanvas.emf", "EMF+\t\t TODO - parse EMFPlusPointR object (section 2.2.1.6)");
                } else if (pathFlags & 0x4000) {
                    // EMFPlusPoint: stored in signed short 16bit integer format
                    sal_Int16 x, y;

                    s.ReadInt16( x ).ReadInt16( y );
                    SAL_INFO ("cppcanvas.emf", "EMF+\t EMFPlusPoint [x,y]: " << x << "," << y);
                    pPoints [i*2] = x;
                    pPoints [i*2 + 1] = y;
                } else {
                    // EMFPlusPointF: stored in Single (float) format
                    s.ReadFloat( pPoints [i*2] ).ReadFloat( pPoints [i*2 + 1] );
                    SAL_INFO ("cppcanvas.emf", "EMF+\t EMFPlusPointF [x,y]: " << pPoints [i*2] << "," << pPoints [i*2 + 1]);
                }

            }

            if (pPointTypes)
                for (int i = 0; i < nPoints; i ++) {
                    s.ReadUChar( pPointTypes [i] );
                    SAL_INFO ("cppcanvas.emf", "EMF+\tpoint type: " << static_cast<int>(pPointTypes [i]));
                }

            aPolygon.clear ();

#if OSL_DEBUG_LEVEL > 1
            const ::basegfx::B2DRectangle aBounds (::basegfx::utils::getRange (GetPolygon (rR)));

            SAL_INFO ("cppcanvas.emf",
                        "EMF+\tpolygon bounding box: " << aBounds.getMinX () << "," << aBounds.getMinY () << aBounds.getWidth () << "x" << aBounds.getHeight () << " (mapped)");
#else
            (void) rR; // avoid warnings
#endif
        }

        ::basegfx::B2DPolyPolygon& EMFPPath::GetPolygon (ImplRenderer const & rR, bool bMapIt, bool bAddLineToCloseShape)
        {
            ::basegfx::B2DPolygon polygon;

            aPolygon.clear ();

            int last_normal = 0, p = 0;
            ::basegfx::B2DPoint prev, mapped;
            bool hasPrev = false;
            for (int i = 0; i < nPoints; i ++) {
                if (p && pPointTypes && (pPointTypes [i] == 0)) {
                    aPolygon.append (polygon);
                    last_normal = i;
                    p = 0;
                    polygon.clear ();
                }

                if (bMapIt)
                    mapped = rR.Map (pPoints [i*2], pPoints [i*2 + 1]);
                else
                    mapped = ::basegfx::B2DPoint (pPoints [i*2], pPoints [i*2 + 1]);
                if (pPointTypes) {
                    if ((pPointTypes [i] & 0x07) == 3) {
                        if (((i - last_normal )% 3) == 1) {
                            polygon.setNextControlPoint (p - 1, mapped);
                            SAL_INFO ("cppcanvas.emf", "polygon append  next: " << p - 1 << " mapped: " << mapped.getX () << "," << mapped.getY ());
                            continue;
                        } else if (((i - last_normal) % 3) == 2) {
                            prev = mapped;
                            hasPrev = true;
                            continue;
                        }
                    } else
                        last_normal = i;
                }
                polygon.append (mapped);
                SAL_INFO ("cppcanvas.emf", "polygon append point: " << pPoints [i*2] << "," << pPoints [i*2 + 1] << " mapped: " << mapped.getX () << ":" << mapped.getY ());
                if (hasPrev) {
                    polygon.setPrevControlPoint (p, prev);
                    SAL_INFO ("cppcanvas.emf", "polygon append  prev: " << p << " mapped: " << prev.getX () << "," << prev.getY ());
                    hasPrev = false;
                }
                p ++;
                if (pPointTypes && (pPointTypes [i] & 0x80)) { // closed polygon
                    polygon.setClosed (true);
                    aPolygon.append (polygon);
                    SAL_INFO ("cppcanvas.emf", "close polygon");
                    last_normal = i + 1;
                    p = 0;
                    polygon.clear ();
                }
            }
            // Draw an extra line between the last point and the first point, to close the shape.
            if (bAddLineToCloseShape) {
                if (bMapIt)
                    polygon.append (rR.Map (pPoints [0], pPoints [1]) );
                else
                    polygon.append (::basegfx::B2DPoint (pPoints [0], pPoints [1]) );
            }
            if (polygon.count ()) {
                aPolygon.append (polygon);

#if OSL_DEBUG_LEVEL > 1
                for (unsigned int i=0; i<aPolygon.count(); i++) {
                    polygon = aPolygon.getB2DPolygon(i);
                    SAL_INFO ("cppcanvas.emf", "polygon: " << i);
                    for (unsigned int j=0; j<polygon.count(); j++) {
                        ::basegfx::B2DPoint point = polygon.getB2DPoint(j);
                        SAL_INFO ("cppcanvas.emf", "point: " << point.getX() << "," << point.getY());
                        if (polygon.isPrevControlPointUsed(j)) {
                            point = polygon.getPrevControlPoint(j);
                            SAL_INFO ("cppcanvas.emf", "prev: " << point.getX() << "," << point.getY());
                        }
                        if (polygon.isNextControlPointUsed(j)) {
                            point = polygon.getNextControlPoint(j);
                            SAL_INFO ("cppcanvas.emf", "next: " << point.getX() << "," << point.getY());
                        }
                    }
                }
#endif
            }

            return aPolygon;
        }
    }
}

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