drawinglayer/source/tools/emfppath.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <basegfx/point/b2dpoint.hxx>
  21 #include <basegfx/polygon/b2dpolygon.hxx>
  22 #include <basegfx/polygon/b2dpolypolygon.hxx>
  23 #include <sal/log.hxx>
  24 #include "emfppath.hxx"
  25
  26 namespace
  27 {
  28     const unsigned char nTopBitInt7 = 0x80;
  29     const unsigned char nSignBitInt7 = 0x40;
  30     // include the sign bit so if it's negative we get
  31     // that "missing" bit pre-set to 1
  32     const unsigned char nValueMaskInt7 = 0x7F;
  33 }
  34
  35 namespace emfplushelper
  36 {
  37     // see 2.2.2.21 EmfPlusInteger7
  38     //     2.2.2.22 EmfPlusInteger15
  39     // and 2.2.2.37 EmfPlusPointR Object
  40     static sal_Int16 GetEmfPlusInteger(SvStream& s)
  41     {
  42         unsigned char u8(0);
  43         s.ReadUChar(u8);
  44
  45         bool bIsEmfPlusInteger15 = u8 & nTopBitInt7;
  46         bool bNegative = u8 & nSignBitInt7;
  47         unsigned char val1 = u8 & nValueMaskInt7;
  48         if (bNegative)
  49             val1 |= nTopBitInt7;
  50         if (!bIsEmfPlusInteger15)
  51         {
  52             return static_cast<signed char>(val1);
  53         }
  54
  55         s.ReadUChar(u8);
  56         sal_uInt16 nRet = (val1 << 8) | u8;
  57         return static_cast<sal_Int16>(nRet);
  58     }
  59
  60     EMFPPath::EMFPPath (sal_uInt32 _nPoints, bool bLines)
  61     {
  62         if (_nPoints > SAL_MAX_UINT32 / (2 * sizeof(float)))
  63         {
  64             _nPoints = SAL_MAX_UINT32 / (2 * sizeof(float));
  65         }
  66
  67         nPoints = _nPoints;
  68         pPoints.reset( new float [nPoints*2] );
  69
  70         if (!bLines)
  71             pPointTypes.reset( new sal_uInt8 [_nPoints] );
  72     }
  73
  74     EMFPPath::~EMFPPath ()
  75     {
  76     }
  77
  78     void EMFPPath::Read (SvStream& s, sal_uInt32 pathFlags)
  79     {
  80         for (sal_uInt32 i = 0; i < nPoints; i ++)
  81         {
  82             if (pathFlags & 0x800)
  83             {
  84                 // EMFPlusPointR: points are stored in EMFPlusInteger7 or
  85                 // EMFPlusInteger15 objects, see section 2.2.2.21/22
  86                 // If 0x800 bit is set, the 0x4000 bit is undefined and must be ignored
  87                 sal_Int32 x = GetEmfPlusInteger(s);
  88                 sal_Int32 y = GetEmfPlusInteger(s);
  89                 pPoints [i*2] = x;
  90                 pPoints [i*2 + 1] = y;
  91                 SAL_INFO("drawinglayer.emf", "EMF+\t\t\t" << i << ". EmfPlusPointR [x,y]: " << x << ", " << y);
  92             }
  93             else if (pathFlags & 0x4000)
  94             {
  95                 // EMFPlusPoint: stored in signed short 16bit integer format
  96                 sal_Int16 x, y;
  97
  98                 s.ReadInt16( x ).ReadInt16( y );
  99                 SAL_INFO ("drawinglayer.emf", "EMF+\t\t\t" << i << ". EmfPlusPoint [x,y]: " << x << ", " << y);
 100                 pPoints [i*2] = x;
 101                 pPoints [i*2 + 1] = y;
 102             }
 103             else
 104             {
 105                 // EMFPlusPointF: stored in Single (float) format
 106                 s.ReadFloat( pPoints [i*2] ).ReadFloat( pPoints [i*2 + 1] );
 107                 SAL_INFO("drawinglayer.emf", "EMF+\t" << i << ". EMFPlusPointF [x,y]: " << pPoints [i * 2] << ", " << pPoints [i * 2 + 1]);
 108             }
 109         }
 110
 111         if (pPointTypes)
 112         {
 113             for (sal_uInt32 i = 0; i < nPoints; i++)
 114             {
 115                 s.ReadUChar(pPointTypes[i]);
 116                 SAL_INFO("drawinglayer.emf", "EMF+\tpoint type: 0x" << std::hex << static_cast<int>(pPointTypes[i]) << std::dec);
 117             }
 118         }
 119
 120         aPolygon.clear();
 121     }
 122
 123     ::basegfx::B2DPolyPolygon& EMFPPath::GetPolygon (EmfPlusHelperData const & rR, bool bMapIt, bool bAddLineToCloseShape)
 124     {
 125         ::basegfx::B2DPolygon polygon;
 126         aPolygon.clear ();
 127         sal_uInt32 last_normal = 0, p = 0;
 128         ::basegfx::B2DPoint prev, mapped;
 129         bool hasPrev = false;
 130
 131         for (sal_uInt32 i = 0; i < nPoints; i ++)
 132         {
 133             if (p && pPointTypes && (pPointTypes [i] == 0))
 134             {
 135                 aPolygon.append (polygon);
 136                 last_normal = i;
 137                 p = 0;
 138                 polygon.clear ();
 139             }
 140
 141             if (bMapIt)
 142                 mapped = rR.Map (pPoints [i*2], pPoints [i*2 + 1]);
 143             else
 144                 mapped = ::basegfx::B2DPoint (pPoints [i*2], pPoints [i*2 + 1]);
 145
 146             if (pPointTypes)
 147             {
 148                 if ((pPointTypes [i] & 0x07) == 3)
 149                 {
 150                     if (((i - last_normal )% 3) == 1)
 151                     {
 152                         polygon.setNextControlPoint (p - 1, mapped);
 153                         SAL_INFO ("drawinglayer.emf", "EMF+\t\tPolygon append next: " << p - 1 << " mapped: " << mapped.getX () << "," << mapped.getY ());
 154                         continue;
 155                     }
 156                     else if (((i - last_normal) % 3) == 2)
 157                     {
 158                         prev = mapped;
 159                         hasPrev = true;
 160                         continue;
 161                     }
 162                 }
 163                 else
 164                 {
 165                     last_normal = i;
 166                 }
 167             }
 168
 169             polygon.append (mapped);
 170             SAL_INFO ("drawinglayer.emf", "EMF+\t\tPoint: " << pPoints [i*2] << "," << pPoints [i*2 + 1] << " mapped: " << mapped.getX () << ":" << mapped.getY ());
 171
 172             if (hasPrev)
 173             {
 174                 polygon.setPrevControlPoint (p, prev);
 175                 SAL_INFO ("drawinglayer.emf", "EMF+\t\tPolygon append prev: " << p << " mapped: " << prev.getX () << "," << prev.getY ());
 176                 hasPrev = false;
 177             }
 178
 179             p++;
 180
 181             if (pPointTypes && (pPointTypes [i] & 0x80)) // closed polygon
 182             {
 183                 polygon.setClosed (true);
 184                 aPolygon.append (polygon);
 185                 SAL_INFO ("drawinglayer.emf", "EMF+\t\tClose polygon");
 186                 last_normal = i + 1;
 187                 p = 0;
 188                 polygon.clear ();
 189             }
 190         }
 191
 192         // Draw an extra line between the last point and the first point, to close the shape.
 193         if (bAddLineToCloseShape)
 194         {
 195             polygon.setClosed (true);
 196         }
 197
 198         if (polygon.count ())
 199         {
 200             aPolygon.append (polygon);
 201
 202 #if OSL_DEBUG_LEVEL > 1
 203             for (unsigned int i=0; i<aPolygon.count(); i++) {
 204                 polygon = aPolygon.getB2DPolygon(i);
 205                 SAL_INFO ("drawinglayer.emf", "EMF+\t\tPolygon: " << i);
 206                 for (unsigned int j=0; j<polygon.count(); j++) {
 207                     ::basegfx::B2DPoint point = polygon.getB2DPoint(j);
 208                     SAL_INFO ("drawinglayer.emf", "EMF+\t\t\tPoint: " << point.getX() << "," << point.getY());
 209                     if (polygon.isPrevControlPointUsed(j)) {
 210                         point = polygon.getPrevControlPoint(j);
 211                         SAL_INFO ("drawinglayer.emf", "EMF+\t\t\tPrev: " << point.getX() << "," << point.getY());
 212                     }
 213                     if (polygon.isNextControlPointUsed(j)) {
 214                         point = polygon.getNextControlPoint(j);
 215                         SAL_INFO ("drawinglayer.emf", "EMF+\t\t\tNext: " << point.getX() << "," << point.getY());
 216                     }
 217                 }
 218             }
 219 #endif
 220         }
 221
 222         return aPolygon;
 223     }
 224 }
 225
 226 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */