1
This CamlImages library (the Library) is distributed under the terms of
2
the GNU Library General Public License version 2 (included below).
4
As a special exception to the GNU Library General Public License, you
5
may link, statically or dynamically, a "work that uses the Library"
6
with a publicly distributed version of the Library to produce an
7
executable file containing portions of the Library, and distribute
8
that executable file under terms of your choice, without any of the
9
additional requirements listed in clause 6 of the GNU Library General
10
Public License. By "a publicly distributed version of the Library",
11
we mean either the unmodified Library as distributed by INRIA, or a
12
modified version of the Library that is distributed under the
13
conditions defined in clause 3 of the GNU Library General Public
14
License. This exception does not however invalidate any other reasons
15
why the executable file might be covered by the GNU Library General
18
----------------------------------------------------------------------
20
GNU LIBRARY GENERAL PUBLIC LICENSE
23
Copyright (C) 1991 Free Software Foundation, Inc.
24
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
25
Everyone is permitted to copy and distribute verbatim copies
26
of this license document, but changing it is not allowed.
28
[This is the first released version of the library GPL. It is
29
numbered 2 because it goes with version 2 of the ordinary GPL.]
33
The licenses for most software are designed to take away your
34
freedom to share and change it. By contrast, the GNU General Public
35
Licenses are intended to guarantee your freedom to share and change
36
free software--to make sure the software is free for all its users.
38
This license, the Library General Public License, applies to some
39
specially designated Free Software Foundation software, and to any
40
other libraries whose authors decide to use it. You can use it for
43
When we speak of free software, we are referring to freedom, not
44
price. Our General Public Licenses are designed to make sure that you
45
have the freedom to distribute copies of free software (and charge for
46
this service if you wish), that you receive source code or can get it
47
if you want it, that you can change the software or use pieces of it
48
in new free programs; and that you know you can do these things.
50
To protect your rights, we need to make restrictions that forbid
51
anyone to deny you these rights or to ask you to surrender the rights.
52
These restrictions translate to certain responsibilities for you if
53
you distribute copies of the library, or if you modify it.
55
For example, if you distribute copies of the library, whether gratis
56
or for a fee, you must give the recipients all the rights that we gave
57
you. You must make sure that they, too, receive or can get the source
58
code. If you link a program with the library, you must provide
59
complete object files to the recipients so that they can relink them
60
with the library, after making changes to the library and recompiling
61
it. And you must show them these terms so they know their rights.
63
Our method of protecting your rights has two steps: (1) copyright
64
the library, and (2) offer you this license which gives you legal
65
permission to copy, distribute and/or modify the library.
67
Also, for each distributor's protection, we want to make certain
68
that everyone understands that there is no warranty for this free
69
library. If the library is modified by someone else and passed on, we
70
want its recipients to know that what they have is not the original
71
version, so that any problems introduced by others will not reflect on
72
the original authors' reputations.
74
Finally, any free program is threatened constantly by software
75
patents. We wish to avoid the danger that companies distributing free
76
software will individually obtain patent licenses, thus in effect
77
transforming the program into proprietary software. To prevent this,
78
we have made it clear that any patent must be licensed for everyone's
79
free use or not licensed at all.
81
Most GNU software, including some libraries, is covered by the ordinary
82
GNU General Public License, which was designed for utility programs. This
83
license, the GNU Library General Public License, applies to certain
84
designated libraries. This license is quite different from the ordinary
85
one; be sure to read it in full, and don't assume that anything in it is
86
the same as in the ordinary license.
88
The reason we have a separate public license for some libraries is that
89
they blur the distinction we usually make between modifying or adding to a
90
program and simply using it. Linking a program with a library, without
91
changing the library, is in some sense simply using the library, and is
92
analogous to running a utility program or application program. However, in
93
a textual and legal sense, the linked executable is a combined work, a
94
derivative of the original library, and the ordinary General Public License
97
Because of this blurred distinction, using the ordinary General
98
Public License for libraries did not effectively promote software
99
sharing, because most developers did not use the libraries. We
100
concluded that weaker conditions might promote sharing better.
102
However, unrestricted linking of non-free programs would deprive the
103
users of those programs of all benefit from the free status of the
104
libraries themselves. This Library General Public License is intended to
105
permit developers of non-free programs to use free libraries, while
106
preserving your freedom as a user of such programs to change the free
107
libraries that are incorporated in them. (We have not seen how to achieve
108
this as regards changes in header files, but we have achieved it as regards
109
changes in the actual functions of the Library.) The hope is that this
110
will lead to faster development of free libraries.
112
The precise terms and conditions for copying, distribution and
113
modification follow. Pay close attention to the difference between a
114
"work based on the library" and a "work that uses the library". The
115
former contains code derived from the library, while the latter only
116
works together with the library.
118
Note that it is possible for a library to be covered by the ordinary
119
General Public License rather than by this special one.
121
GNU LIBRARY GENERAL PUBLIC LICENSE
122
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
124
0. This License Agreement applies to any software library which
125
contains a notice placed by the copyright holder or other authorized
126
party saying it may be distributed under the terms of this Library
127
General Public License (also called "this License"). Each licensee is
130
A "library" means a collection of software functions and/or data
131
prepared so as to be conveniently linked with application programs
132
(which use some of those functions and data) to form executables.
134
The "Library", below, refers to any such software library or work
135
which has been distributed under these terms. A "work based on the
136
Library" means either the Library or any derivative work under
137
copyright law: that is to say, a work containing the Library or a
138
portion of it, either verbatim or with modifications and/or translated
139
straightforwardly into another language. (Hereinafter, translation is
140
included without limitation in the term "modification".)
142
"Source code" for a work means the preferred form of the work for
143
making modifications to it. For a library, complete source code means
144
all the source code for all modules it contains, plus any associated
145
interface definition files, plus the scripts used to control compilation
146
and installation of the library.
148
Activities other than copying, distribution and modification are not
149
covered by this License; they are outside its scope. The act of
150
running a program using the Library is not restricted, and output from
151
such a program is covered only if its contents constitute a work based
152
on the Library (independent of the use of the Library in a tool for
153
writing it). Whether that is true depends on what the Library does
154
and what the program that uses the Library does.
156
1. You may copy and distribute verbatim copies of the Library's
157
complete source code as you receive it, in any medium, provided that
158
you conspicuously and appropriately publish on each copy an
159
appropriate copyright notice and disclaimer of warranty; keep intact
160
all the notices that refer to this License and to the absence of any
161
warranty; and distribute a copy of this License along with the
164
You may charge a fee for the physical act of transferring a copy,
165
and you may at your option offer warranty protection in exchange for a
168
2. You may modify your copy or copies of the Library or any portion
169
of it, thus forming a work based on the Library, and copy and
170
distribute such modifications or work under the terms of Section 1
171
above, provided that you also meet all of these conditions:
173
a) The modified work must itself be a software library.
175
b) You must cause the files modified to carry prominent notices
176
stating that you changed the files and the date of any change.
178
c) You must cause the whole of the work to be licensed at no
179
charge to all third parties under the terms of this License.
181
d) If a facility in the modified Library refers to a function or a
182
table of data to be supplied by an application program that uses
183
the facility, other than as an argument passed when the facility
184
is invoked, then you must make a good faith effort to ensure that,
185
in the event an application does not supply such function or
186
table, the facility still operates, and performs whatever part of
187
its purpose remains meaningful.
189
(For example, a function in a library to compute square roots has
190
a purpose that is entirely well-defined independent of the
191
application. Therefore, Subsection 2d requires that any
192
application-supplied function or table used by this function must
193
be optional: if the application does not supply it, the square
194
root function must still compute square roots.)
196
These requirements apply to the modified work as a whole. If
197
identifiable sections of that work are not derived from the Library,
198
and can be reasonably considered independent and separate works in
199
themselves, then this License, and its terms, do not apply to those
200
sections when you distribute them as separate works. But when you
201
distribute the same sections as part of a whole which is a work based
202
on the Library, the distribution of the whole must be on the terms of
203
this License, whose permissions for other licensees extend to the
204
entire whole, and thus to each and every part regardless of who wrote
207
Thus, it is not the intent of this section to claim rights or contest
208
your rights to work written entirely by you; rather, the intent is to
209
exercise the right to control the distribution of derivative or
210
collective works based on the Library.
212
In addition, mere aggregation of another work not based on the Library
213
with the Library (or with a work based on the Library) on a volume of
214
a storage or distribution medium does not bring the other work under
215
the scope of this License.
217
3. You may opt to apply the terms of the ordinary GNU General Public
218
License instead of this License to a given copy of the Library. To do
219
this, you must alter all the notices that refer to this License, so
220
that they refer to the ordinary GNU General Public License, version 2,
221
instead of to this License. (If a newer version than version 2 of the
222
ordinary GNU General Public License has appeared, then you can specify
223
that version instead if you wish.) Do not make any other change in
226
Once this change is made in a given copy, it is irreversible for
227
that copy, so the ordinary GNU General Public License applies to all
228
subsequent copies and derivative works made from that copy.
230
This option is useful when you wish to copy part of the code of
231
the Library into a program that is not a library.
233
4. You may copy and distribute the Library (or a portion or
234
derivative of it, under Section 2) in object code or executable form
235
under the terms of Sections 1 and 2 above provided that you accompany
236
it with the complete corresponding machine-readable source code, which
237
must be distributed under the terms of Sections 1 and 2 above on a
238
medium customarily used for software interchange.
240
If distribution of object code is made by offering access to copy
241
from a designated place, then offering equivalent access to copy the
242
source code from the same place satisfies the requirement to
243
distribute the source code, even though third parties are not
244
compelled to copy the source along with the object code.
246
5. A program that contains no derivative of any portion of the
247
Library, but is designed to work with the Library by being compiled or
248
linked with it, is called a "work that uses the Library". Such a
249
work, in isolation, is not a derivative work of the Library, and
250
therefore falls outside the scope of this License.
252
However, linking a "work that uses the Library" with the Library
253
creates an executable that is a derivative of the Library (because it
254
contains portions of the Library), rather than a "work that uses the
255
library". The executable is therefore covered by this License.
256
Section 6 states terms for distribution of such executables.
258
When a "work that uses the Library" uses material from a header file
259
that is part of the Library, the object code for the work may be a
260
derivative work of the Library even though the source code is not.
261
Whether this is true is especially significant if the work can be
262
linked without the Library, or if the work is itself a library. The
263
threshold for this to be true is not precisely defined by law.
265
If such an object file uses only numerical parameters, data
266
structure layouts and accessors, and small macros and small inline
267
functions (ten lines or less in length), then the use of the object
268
file is unrestricted, regardless of whether it is legally a derivative
269
work. (Executables containing this object code plus portions of the
270
Library will still fall under Section 6.)
272
Otherwise, if the work is a derivative of the Library, you may
273
distribute the object code for the work under the terms of Section 6.
274
Any executables containing that work also fall under Section 6,
275
whether or not they are linked directly with the Library itself.
277
6. As an exception to the Sections above, you may also compile or
278
link a "work that uses the Library" with the Library to produce a
279
work containing portions of the Library, and distribute that work
280
under terms of your choice, provided that the terms permit
281
modification of the work for the customer's own use and reverse
282
engineering for debugging such modifications.
284
You must give prominent notice with each copy of the work that the
285
Library is used in it and that the Library and its use are covered by
286
this License. You must supply a copy of this License. If the work
287
during execution displays copyright notices, you must include the
288
copyright notice for the Library among them, as well as a reference
289
directing the user to the copy of this License. Also, you must do one
292
a) Accompany the work with the complete corresponding
293
machine-readable source code for the Library including whatever
294
changes were used in the work (which must be distributed under
295
Sections 1 and 2 above); and, if the work is an executable linked
296
with the Library, with the complete machine-readable "work that
297
uses the Library", as object code and/or source code, so that the
298
user can modify the Library and then relink to produce a modified
299
executable containing the modified Library. (It is understood
300
that the user who changes the contents of definitions files in the
301
Library will not necessarily be able to recompile the application
302
to use the modified definitions.)
304
b) Accompany the work with a written offer, valid for at
305
least three years, to give the same user the materials
306
specified in Subsection 6a, above, for a charge no more
307
than the cost of performing this distribution.
309
c) If distribution of the work is made by offering access to copy
310
from a designated place, offer equivalent access to copy the above
311
specified materials from the same place.
313
d) Verify that the user has already received a copy of these
314
materials or that you have already sent this user a copy.
316
For an executable, the required form of the "work that uses the
317
Library" must include any data and utility programs needed for
318
reproducing the executable from it. However, as a special exception,
319
the source code distributed need not include anything that is normally
320
distributed (in either source or binary form) with the major
321
components (compiler, kernel, and so on) of the operating system on
322
which the executable runs, unless that component itself accompanies
325
It may happen that this requirement contradicts the license
326
restrictions of other proprietary libraries that do not normally
327
accompany the operating system. Such a contradiction means you cannot
328
use both them and the Library together in an executable that you
331
7. You may place library facilities that are a work based on the
332
Library side-by-side in a single library together with other library
333
facilities not covered by this License, and distribute such a combined
334
library, provided that the separate distribution of the work based on
335
the Library and of the other library facilities is otherwise
336
permitted, and provided that you do these two things:
338
a) Accompany the combined library with a copy of the same work
339
based on the Library, uncombined with any other library
340
facilities. This must be distributed under the terms of the
343
b) Give prominent notice with the combined library of the fact
344
that part of it is a work based on the Library, and explaining
345
where to find the accompanying uncombined form of the same work.
347
8. You may not copy, modify, sublicense, link with, or distribute
348
the Library except as expressly provided under this License. Any
349
attempt otherwise to copy, modify, sublicense, link with, or
350
distribute the Library is void, and will automatically terminate your
351
rights under this License. However, parties who have received copies,
352
or rights, from you under this License will not have their licenses
353
terminated so long as such parties remain in full compliance.
355
9. You are not required to accept this License, since you have not
356
signed it. However, nothing else grants you permission to modify or
357
distribute the Library or its derivative works. These actions are
358
prohibited by law if you do not accept this License. Therefore, by
359
modifying or distributing the Library (or any work based on the
360
Library), you indicate your acceptance of this License to do so, and
361
all its terms and conditions for copying, distributing or modifying
362
the Library or works based on it.
364
10. Each time you redistribute the Library (or any work based on the
365
Library), the recipient automatically receives a license from the
366
original licensor to copy, distribute, link with or modify the Library
367
subject to these terms and conditions. You may not impose any further
368
restrictions on the recipients' exercise of the rights granted herein.
369
You are not responsible for enforcing compliance by third parties to
372
11. If, as a consequence of a court judgment or allegation of patent
373
infringement or for any other reason (not limited to patent issues),
374
conditions are imposed on you (whether by court order, agreement or
375
otherwise) that contradict the conditions of this License, they do not
376
excuse you from the conditions of this License. If you cannot
377
distribute so as to satisfy simultaneously your obligations under this
378
License and any other pertinent obligations, then as a consequence you
379
may not distribute the Library at all. For example, if a patent
380
license would not permit royalty-free redistribution of the Library by
381
all those who receive copies directly or indirectly through you, then
382
the only way you could satisfy both it and this License would be to
383
refrain entirely from distribution of the Library.
385
If any portion of this section is held invalid or unenforceable under any
386
particular circumstance, the balance of the section is intended to apply,
387
and the section as a whole is intended to apply in other circumstances.
389
It is not the purpose of this section to induce you to infringe any
390
patents or other property right claims or to contest validity of any
391
such claims; this section has the sole purpose of protecting the
392
integrity of the free software distribution system which is
393
implemented by public license practices. Many people have made
394
generous contributions to the wide range of software distributed
395
through that system in reliance on consistent application of that
396
system; it is up to the author/donor to decide if he or she is willing
397
to distribute software through any other system and a licensee cannot
400
This section is intended to make thoroughly clear what is believed to
401
be a consequence of the rest of this License.
403
12. If the distribution and/or use of the Library is restricted in
404
certain countries either by patents or by copyrighted interfaces, the
405
original copyright holder who places the Library under this License may add
406
an explicit geographical distribution limitation excluding those countries,
407
so that distribution is permitted only in or among countries not thus
408
excluded. In such case, this License incorporates the limitation as if
409
written in the body of this License.
411
13. The Free Software Foundation may publish revised and/or new
412
versions of the Library General Public License from time to time.
413
Such new versions will be similar in spirit to the present version,
414
but may differ in detail to address new problems or concerns.
416
Each version is given a distinguishing version number. If the Library
417
specifies a version number of this License which applies to it and
418
"any later version", you have the option of following the terms and
419
conditions either of that version or of any later version published by
420
the Free Software Foundation. If the Library does not specify a
421
license version number, you may choose any version ever published by
422
the Free Software Foundation.
424
14. If you wish to incorporate parts of the Library into other free
425
programs whose distribution conditions are incompatible with these,
426
write to the author to ask for permission. For software which is
427
copyrighted by the Free Software Foundation, write to the Free
428
Software Foundation; we sometimes make exceptions for this. Our
429
decision will be guided by the two goals of preserving the free status
430
of all derivatives of our free software and of promoting the sharing
431
and reuse of software generally.
435
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
436
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
437
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
438
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
439
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
440
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
441
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
442
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
443
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
445
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
446
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
447
AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
448
FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
449
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
450
LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
451
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
452
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
453
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
456
END OF TERMS AND CONDITIONS
458
Appendix: How to Apply These Terms to Your New Libraries
460
If you develop a new library, and you want it to be of the greatest
461
possible use to the public, we recommend making it free software that
462
everyone can redistribute and change. You can do so by permitting
463
redistribution under these terms (or, alternatively, under the terms of the
464
ordinary General Public License).
466
To apply these terms, attach the following notices to the library. It is
467
safest to attach them to the start of each source file to most effectively
468
convey the exclusion of warranty; and each file should have at least the
469
"copyright" line and a pointer to where the full notice is found.
471
<one line to give the library's name and a brief idea of what it does.>
472
Copyright (C) <year> <name of author>
474
This library is free software; you can redistribute it and/or
475
modify it under the terms of the GNU Library General Public
476
License as published by the Free Software Foundation; either
477
version 2 of the License, or (at your option) any later version.
479
This library is distributed in the hope that it will be useful,
480
but WITHOUT ANY WARRANTY; without even the implied warranty of
481
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
482
Library General Public License for more details.
484
You should have received a copy of the GNU Library General Public
485
License along with this library; if not, write to the Free
486
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
489
Also add information on how to contact you by electronic and paper mail.
491
You should also get your employer (if you work as a programmer) or your
492
school, if any, to sign a "copyright disclaimer" for the library, if
493
necessary. Here is a sample; alter the names:
495
Yoyodyne, Inc., hereby disclaims all copyright interest in the
496
library `Frob' (a library for tweaking knobs) written by James Random Hacker.
498
<signature of Ty Coon>, 1 April 1990
499
Ty Coon, President of Vice
501
That's all there is to it!