MWAWPictData.hxx
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1 /* -*- Mode: C++; c-default-style: "k&r"; indent-tabs-mode: nil; tab-width: 2; c-basic-offset: 2 -*- */
2 
3 /* libmwaw
4 * Version: MPL 2.0 / LGPLv2+
5 *
6 * The contents of this file are subject to the Mozilla Public License Version
7 * 2.0 (the "License"); you may not use this file except in compliance with
8 * the License or as specified alternatively below. You may obtain a copy of
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15 *
16 * Major Contributor(s):
17 * Copyright (C) 2002 William Lachance (wrlach@gmail.com)
18 * Copyright (C) 2002,2004 Marc Maurer (uwog@uwog.net)
19 * Copyright (C) 2004-2006 Fridrich Strba (fridrich.strba@bluewin.ch)
20 * Copyright (C) 2006, 2007 Andrew Ziem
21 * Copyright (C) 2011, 2012 Alonso Laurent (alonso@loria.fr)
22 *
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24 * All Rights Reserved.
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26 * For minor contributions see the git repository.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU Lesser General Public License Version 2 or later (the "LGPLv2+"),
30 * in which case the provisions of the LGPLv2+ are applicable
31 * instead of those above.
32 */
33 
34 /* This header contains code specific to a pict which can be stored in a
35  * librevenge::RVNGBinaryData, this includes :
36  * - the mac Pict format (in MWAWPictMac)
37  * - some old data names db3
38  * - some potential short data file
39  */
40 
41 #ifndef MWAW_PICT_DATA
42 # define MWAW_PICT_DATA
43 
44 # include <ostream>
45 
46 # include <librevenge/librevenge.h>
47 
48 # include "libmwaw_internal.hxx"
49 # include "MWAWPict.hxx"
50 
52 class MWAWPictData : public MWAWPict
53 {
54 public:
56  enum SubType { PictMac, DB3, Unknown };
58  virtual Type getType() const
59  {
60  return MWAWPict::PictData;
61  }
63  virtual SubType getSubType() const = 0;
64 
66  virtual bool getBinary(MWAWEmbeddedObject &picture) const
67  {
68  if (!valid() || isEmpty()) return false;
69 
70  librevenge::RVNGBinaryData data;
71  createFileData(m_data, data);
72  picture=MWAWEmbeddedObject(data, "image/pict");
73  return true;
74  }
75 
77  virtual bool sure() const
78  {
79  return getSubType() != Unknown;
80  }
81 
83  virtual bool valid() const
84  {
85  return false;
86  }
87 
89  bool isEmpty() const
90  {
91  return m_empty;
92  }
93 
98  static ReadResult check(MWAWInputStreamPtr input, int size, MWAWBox2f &box)
99  {
100  return checkOrGet(input, size, box, 0L);
101  }
102 
106  static MWAWPictData *get(MWAWInputStreamPtr input, int size)
107  {
108  MWAWPictData *res = 0L;
109  MWAWBox2f box;
110  if (checkOrGet(input, size, box, &res) == MWAW_R_BAD) return 0L;
111  if (res) { // if the bdbox is good, we set it
112  MWAWVec2f sz = box.size();
113  if (sz.x()>0 && sz.y()>0) res->setBdBox(box);
114  }
115  return res;
116  }
117 
120  virtual int cmp(MWAWPict const &a) const
121  {
122  int diff = MWAWPict::cmp(a);
123  if (diff) return diff;
124  MWAWPictData const &aPict = static_cast<MWAWPictData const &>(a);
125 
126  diff = (int) m_empty - (int) aPict.m_empty;
127  if (diff) return (diff < 0) ? -1 : 1;
128  else if (m_empty) // both empty
129  return 0;
130  // the type
131  diff = getSubType() - aPict.getSubType();
132  if (diff) return (diff < 0) ? -1 : 1;
133 
134  if (m_data.size() < aPict.m_data.size())
135  return 1;
136  if (m_data.size() > aPict.m_data.size())
137  return -1;
138  unsigned char const *data=m_data.getDataBuffer();
139  unsigned char const *aData=m_data.getDataBuffer();
140  if (!data || !aData) return 0; // must only appear if the two buffers are empty
141  for (unsigned long c=0; c < m_data.size(); c++, data++, aData++) {
142  if (*data < *aData) return -1;
143  if (*data > *aData) return 1;
144  }
145  return 0;
146  }
147 
148 protected:
151  static bool createFileData(librevenge::RVNGBinaryData const &orig, librevenge::RVNGBinaryData &result);
152 
154  MWAWPictData(): m_data(), m_empty(false) { }
155  explicit MWAWPictData(MWAWBox2f &): m_data(), m_empty(false) { }
156 
162  static ReadResult checkOrGet(MWAWInputStreamPtr input, int size,
163  MWAWBox2f &box, MWAWPictData **result = 0L);
164 
166  librevenge::RVNGBinaryData m_data;
167 
169  bool m_empty;
170 };
171 
173 class MWAWPictDB3 : public MWAWPictData
174 {
175 public:
177  virtual SubType getSubType() const
178  {
179  return DB3;
180  }
181 
183  virtual bool valid() const
184  {
185  return m_data.size() != 0;
186  }
187 
190  virtual int cmp(MWAWPict const &a) const
191  {
192  return MWAWPictData::cmp(a);
193  }
194 
195 protected:
196 
199  {
200  m_empty = false;
201  }
202 
203  friend class MWAWPictData;
209  static ReadResult checkOrGet(MWAWInputStreamPtr input, int size, MWAWPictData **result = 0L);
210 };
211 
214 {
215 public:
217  virtual SubType getSubType() const
218  {
219  return Unknown;
220  }
221 
223  virtual bool valid() const
224  {
225  return m_data.size() != 0;
226  }
227 
230  virtual int cmp(MWAWPict const &a) const
231  {
232  return MWAWPictData::cmp(a);
233  }
234 
235 protected:
236 
239  {
240  m_empty = false;
241  }
242 
243  friend class MWAWPictData;
244 
250  static ReadResult checkOrGet(MWAWInputStreamPtr input, int size, MWAWPictData **result = 0L);
251 };
252 
253 #endif
254 // vim: set filetype=cpp tabstop=2 shiftwidth=2 cindent autoindent smartindent noexpandtab:

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