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 <o3tl/safeint.hxx>
  24 #include <sal/log.hxx>
  25 #include "emfppath.hxx"
  26
  27 namespace
  28 {
  29     const unsigned char nTopBitInt7 = 0x80;
  30     const unsigned char nSignBitInt7 = 0x40;
  31     // include the sign bit so if it's negative we get
  32     // that "missing" bit pre-set to 1
  33     const unsigned char nValueMaskInt7 = 0x7F;
  34 }
  35
  36 namespace emfplushelper
  37 {
  38     // see 2.2.2.21 EmfPlusInteger7
  39     //     2.2.2.22 EmfPlusInteger15
  40     // and 2.2.2.37 EmfPlusPointR Object
  41     static sal_Int16 GetEmfPlusInteger(SvStream& s)
  42     {
  43         unsigned char u8(0);
  44         s.ReadUChar(u8);
  45
  46         bool bIsEmfPlusInteger15 = u8 & nTopBitInt7;
  47         bool bNegative = u8 & nSignBitInt7;
  48         unsigned char val1 = u8 & nValueMaskInt7;
  49         if (bNegative)
  50             val1 |= nTopBitInt7;
  51         if (!bIsEmfPlusInteger15)
  52         {
  53             return static_cast<signed char>(val1);
  54         }
  55
  56         s.ReadUChar(u8);
  57         sal_uInt16 nRet = (val1 << 8) | u8;
  58         return static_cast<sal_Int16>(nRet);
  59     }
  60
  61     EMFPPath::EMFPPath (sal_Int32 _nPoints, bool bLines)
  62     {
  63         if (_nPoints<0 || o3tl::make_unsigned(_nPoints)>SAL_MAX_INT32 / (2 * sizeof(float)))
  64         {
  65             _nPoints = SAL_MAX_INT32 / (2 * sizeof(float));
  66         }
  67
  68         nPoints = _nPoints;
  69         pPoints.reset( new float [nPoints*2] );
  70
  71         if (!bLines)
  72             pPointTypes.reset( new sal_uInt8 [_nPoints] );
  73     }
  74
  75     EMFPPath::~EMFPPath ()
  76     {
  77     }
  78
  79     void EMFPPath::Read (SvStream& s, sal_uInt32 pathFlags)
  80     {
  81         for (int i = 0; i < nPoints; i ++)
  82         {
  83             if (pathFlags & 0x800)
  84             {
  85                 // EMFPlusPointR: points are stored in EMFPlusInteger7 or
  86                 // EMFPlusInteger15 objects, see section 2.2.2.21/22
  87                 // If 0x800 bit is set, the 0x4000 bit is undefined and must be ignored
  88                 sal_Int32 x = GetEmfPlusInteger(s);
  89                 sal_Int32 y = GetEmfPlusInteger(s);
  90                 pPoints [i*2] = x;
  91                 pPoints [i*2 + 1] = y;
  92                 SAL_INFO("drawinglayer", "EMF+\t\t\tEmfPlusPointR [x,y]: " << x << ", " << y);
  93             }
  94             else if (pathFlags & 0x4000)
  95             {
  96                 // EMFPlusPoint: stored in signed short 16bit integer format
  97                 sal_Int16 x, y;
  98
  99                 s.ReadInt16( x ).ReadInt16( y );
 100                 SAL_INFO ("drawinglayer", "EMF+\t\t\tEmfPlusPoint [x,y]: " << x << "," << y);
 101                 pPoints [i*2] = x;
 102                 pPoints [i*2 + 1] = y;
 103             }
 104             else
 105             {
 106                 // EMFPlusPointF: stored in Single (float) format
 107                 s.ReadFloat( pPoints [i*2] ).ReadFloat( pPoints [i*2 + 1] );
 108                 SAL_INFO ("drawinglayer", "EMF+\t EMFPlusPointF [x,y]: " << pPoints [i*2] << "," << pPoints [i*2 + 1]);
 109             }
 110         }
 111
 112         if (pPointTypes)
 113         {
 114             for (int i = 0; i < nPoints; i++)
 115             {
 116                 s.ReadUChar(pPointTypes[i]);
 117                 SAL_INFO("drawinglayer", "EMF+\tpoint type: " << static_cast<int>(pPointTypes[i]));
 118             }
 119         }
 120
 121         aPolygon.clear();
 122     }
 123
 124     ::basegfx::B2DPolyPolygon& EMFPPath::GetPolygon (EmfPlusHelperData const & rR, bool bMapIt, bool bAddLineToCloseShape)
 125     {
 126         ::basegfx::B2DPolygon polygon;
 127         aPolygon.clear ();
 128         int last_normal = 0, p = 0;
 129         ::basegfx::B2DPoint prev, mapped;
 130         bool hasPrev = false;
 131
 132         for (int i = 0; i < nPoints; i ++)
 133         {
 134             if (p && pPointTypes && (pPointTypes [i] == 0))
 135             {
 136                 aPolygon.append (polygon);
 137                 last_normal = i;
 138                 p = 0;
 139                 polygon.clear ();
 140             }
 141
 142             if (bMapIt)
 143                 mapped = rR.Map (pPoints [i*2], pPoints [i*2 + 1]);
 144             else
 145                 mapped = ::basegfx::B2DPoint (pPoints [i*2], pPoints [i*2 + 1]);
 146
 147             if (pPointTypes)
 148             {
 149                 if ((pPointTypes [i] & 0x07) == 3)
 150                 {
 151                     if (((i - last_normal )% 3) == 1)
 152                     {
 153                         polygon.setNextControlPoint (p - 1, mapped);
 154                         SAL_INFO ("drawinglayer", "EMF+\t\tPolygon append next: " << p - 1 << " mapped: " << mapped.getX () << "," << mapped.getY ());
 155                         continue;
 156                     }
 157                     else if (((i - last_normal) % 3) == 2)
 158                     {
 159                         prev = mapped;
 160                         hasPrev = true;
 161                         continue;
 162                     }
 163                 }
 164                 else
 165                 {
 166                     last_normal = i;
 167                 }
 168             }
 169
 170             polygon.append (mapped);
 171             SAL_INFO ("drawinglayer", "EMF+\t\tPolygon append point: " << pPoints [i*2] << "," << pPoints [i*2 + 1] << " mapped: " << mapped.getX () << ":" << mapped.getY ());
 172
 173             if (hasPrev)
 174             {
 175                 polygon.setPrevControlPoint (p, prev);
 176                 SAL_INFO ("drawinglayer", "EMF+\t\tPolygon append  prev: " << p << " mapped: " << prev.getX () << "," << prev.getY ());
 177                 hasPrev = false;
 178             }
 179
 180             p ++;
 181
 182             if (pPointTypes && (pPointTypes [i] & 0x80))
 183             {
 184                 // closed polygon
 185                 polygon.setClosed (true);
 186                 aPolygon.append (polygon);
 187                 SAL_INFO ("drawinglayer", "EMF+\t\tClose polygon");
 188                 last_normal = i + 1;
 189                 p = 0;
 190                 polygon.clear ();
 191             }
 192         }
 193
 194         // Draw an extra line between the last point and the first point, to close the shape.
 195         if (bAddLineToCloseShape)
 196         {
 197             polygon.setClosed (true);
 198         }
 199
 200         if (polygon.count ())
 201         {
 202             aPolygon.append (polygon);
 203
 204 #if OSL_DEBUG_LEVEL > 1
 205             for (unsigned int i=0; i<aPolygon.count(); i++) {
 206                 polygon = aPolygon.getB2DPolygon(i);
 207                 SAL_INFO ("drawinglayer", "EMF+\t\tPolygon: " << i);
 208                 for (unsigned int j=0; j<polygon.count(); j++) {
 209                     ::basegfx::B2DPoint point = polygon.getB2DPoint(j);
 210                     SAL_INFO ("drawinglayer", "EMF+\t\t\tPoint: " << point.getX() << "," << point.getY());
 211                     if (polygon.isPrevControlPointUsed(j)) {
 212                         point = polygon.getPrevControlPoint(j);
 213                         SAL_INFO ("drawinglayer", "EMF+\t\t\tPrev: " << point.getX() << "," << point.getY());
 214                     }
 215                     if (polygon.isNextControlPointUsed(j)) {
 216                         point = polygon.getNextControlPoint(j);
 217                         SAL_INFO ("drawinglayer", "EMF+\t\t\tNext: " << point.getX() << "," << point.getY());
 218                     }
 219                 }
 220             }
 221 #endif
 222         }
 223
 224         return aPolygon;
 225     }
 226 }
 227
 228 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */