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
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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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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 <assert.h>
45 # include <ostream>
46 
47 # include <librevenge/librevenge.h>
48 
49 # include "libmwaw_internal.hxx"
50 # include "MWAWPict.hxx"
51 
53 class MWAWPictData : public MWAWPict
54 {
55 public:
57  enum SubType { PictMac, DB3, Unknown };
59  virtual Type getType() const
60  {
61  return MWAWPict::PictData;
62  }
64  virtual SubType getSubType() const = 0;
65 
67  virtual bool getBinary(librevenge::RVNGBinaryData &res, std::string &s) const
68  {
69  if (!valid() || isEmpty()) return false;
70 
71  s = "image/pict";
72  createFileData(m_data, res);
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) { }
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:
librevenge::RVNGBinaryData m_data
the data size (without the empty header of 512 characters)
Definition: MWAWPictData.hxx:166
MWAWPictData(MWAWBox2f &)
Definition: MWAWPictData.hxx:155
virtual bool sure() const
returns true if we are relatively sure that the data are correct
Definition: MWAWPictData.hxx:77
Definition: MWAWPictData.hxx:57
a small table file (known by open office)
Definition: MWAWPictData.hxx:173
virtual bool valid() const
returns true if the picture is valid
Definition: MWAWPictData.hxx:83
Definition: MWAWPictData.hxx:57
static ReadResult checkOrGet(MWAWInputStreamPtr input, int size, MWAWBox2f &box, MWAWPictData **result=0L)
checks if the data pointed by input and of given size is a pict
Definition: MWAWPictData.cxx:56
virtual bool valid() const
returns true if the picture is valid
Definition: MWAWPictData.hxx:183
static bool createFileData(librevenge::RVNGBinaryData const &orig, librevenge::RVNGBinaryData &result)
a file pict can be created from the data pict by adding a header with size 512, this function do this...
Definition: MWAWPictData.cxx:45
ReadResult
an enum to defined the result of a parsing use by some picture's classes which can read their data ...
Definition: MWAWPict.hxx:74
virtual Type getType() const
returns the picture type
Definition: MWAWPictData.hxx:59
class to store small data which are potentially a picture
Definition: MWAWPictData.hxx:213
virtual bool valid() const
returns true if the picture is valid
Definition: MWAWPictData.hxx:223
virtual SubType getSubType() const
returns the picture subtype
Definition: MWAWPictData.hxx:177
static ReadResult checkOrGet(MWAWInputStreamPtr input, int size, MWAWPictData **result=0L)
checks if the data pointed by input and of given size is a pict
Definition: MWAWPictData.cxx:96
static ReadResult checkOrGet(MWAWInputStreamPtr input, int size, MWAWPictData **result=0L)
checks if the data pointed by input and of given size is a pict
Definition: MWAWPictData.cxx:118
virtual int cmp(MWAWPict const &a) const
a virtual function used to obtain a strict order, must be redefined in the subs class ...
Definition: MWAWPict.hxx:102
T x() const
first element
Definition: libmwaw_internal.hxx:551
void setBdBox(MWAWBox2f const &box)
sets the bdbox of the picture
Definition: MWAWPict.hxx:85
virtual int cmp(MWAWPict const &a) const
a virtual function used to obtain a strict order, must be redefined in the subs class ...
Definition: MWAWPictData.hxx:190
Definition: MWAWPictData.hxx:57
T y() const
second element
Definition: libmwaw_internal.hxx:556
MWAWVec2< T > size() const
the box size
Definition: libmwaw_internal.hxx:947
virtual bool getBinary(librevenge::RVNGBinaryData &res, std::string &s) const
returns the final librevenge::RVNGBinary data
Definition: MWAWPictData.hxx:67
bool m_empty
some picture can be valid but empty
Definition: MWAWPictData.hxx:169
an abstract class which defines basic formated picture ( AppleŠ Pict, DB3, ...)
Definition: MWAWPictData.hxx:53
virtual int cmp(MWAWPict const &a) const
a virtual function used to obtain a strict order, must be redefined in the subs class ...
Definition: MWAWPictData.hxx:230
MWAWPictData()
protected constructor: use check to construct a picture
Definition: MWAWPictData.hxx:154
Type
the different picture types:
Definition: MWAWPict.hxx:64
MWAWPictDUnknown()
protected constructor: uses check to construct a picture
Definition: MWAWPictData.hxx:238
Definition: MWAWPict.hxx:64
virtual int cmp(MWAWPict const &a) const
a virtual function used to obtain a strict order, must be redefined in the subs class ...
Definition: MWAWPictData.hxx:120
shared_ptr< MWAWInputStream > MWAWInputStreamPtr
a smart pointer of MWAWInputStream
Definition: libmwaw_internal.hxx:439
virtual SubType getSubType() const =0
returns the picture subtype
SubType
the picture subtype
Definition: MWAWPictData.hxx:57
Definition: MWAWPict.hxx:74
virtual SubType getSubType() const
returns the picture subtype
Definition: MWAWPictData.hxx:217
bool isEmpty() const
returns true if the picture is valid and has size 0 or contains no data
Definition: MWAWPictData.hxx:89
static ReadResult check(MWAWInputStreamPtr input, int size, MWAWBox2f &box)
checks if the data pointed by input is known
Definition: MWAWPictData.hxx:98
Generic function used to define/store a picture.
Definition: MWAWPict.hxx:52
MWAWPictDB3()
protected constructor: uses check to construct a picture
Definition: MWAWPictData.hxx:198

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