1 ================================================================
2 Copyright (c) 1999-2004 Arnar M. Hrafnkelsson. All rights reserved.
3 Copyright (c) 2004-2009 Anthony Cook.
4 This program is free software; you can redistribute it and/or
5 modify it under the same terms as Perl itself.
6 ================================================================
8 >> THIS SOFTWARE COMES WITH ABSOLUTELY NO WARRANTY WHATSOEVER <<
10 If you like or hate Imager, please let me know by sending mail
11 to imager@imager.perl.org - I love feedback.
13 ================================================================
16 ========================
17 1. Patent infringements?
18 ========================
20 Imager as such contains no patented algorithms. The external
21 libraries (which are not written by me) may or may not contain
22 patented algorithms. YOU ARE SOLELY RESPONSIBLE FOR OBTAINING
23 LICENSE(S) TO USE SUCH LIBRARIES SHOULD YOU NEED ANY.
26 ========================
27 2. Compiling and testing
28 ========================
30 Some care has been taken to make the installation as smooth as
31 possible. This is rather hard due to the difference between operating
32 systems and site setups. To get started just type
36 It should blurb out a list of which libraries were found and which
37 not. If you add a library to the machine after installing Imager it
38 does not automatically become available in Imager. It only uses the
39 libraries that are found. If the list of found libraries is not what
40 you expected, then the Makefile.PL is either not searching in the
41 right directories or your box does not have the libraries you think it
42 does. For a list of where to get the libraries have a look at
43 3. External dependencies. To widen the search path for libraries and
44 include files set the IM_INCPATH and IM_LIBPATH variables. The
45 environment variables that matter when Makefile.PL is run are
47 IM_INCPATH colon separated list of paths to extra include files
48 IM_LIBPATH colon separated list of paths to extra library files
50 IM_VERBOSE turns on verbose mode for the library scanning and such
51 IM_MANUAL to manually select which libraries are used and which not
52 IM_NOLOG if true logging will not be compiled into the module
53 IM_DEBUG_MALLOC if true malloc debugging will be compiled into the module
54 do not use IM_DEBUG_MALLOC in production - this slows
57 IM_CFLAGS Extra flags to pass to the compiler
58 IM_LFLAGS Extra flags to pass to the linker
59 IM_DFLAGS Extra flags to pass to the preprocessor
63 When finding the libraries has been sorted out it's time for
67 and if that works then do
71 If either fails do take a peek at the file errep.perl. It's creates a
72 file report.txt. This is some information which will help me discover
73 where the problem is so I can try to fix it in future releases. If
74 you find running it ok (just remember - no warranty!) please send the
75 report.txt via email to imager@imager.perl.org.
79 A common problem is that libgif/libungif are sometimes linked to the X
80 libraries and then running the tests fails. In that case something
83 $ IM_LFLAGS="-L/usr/X11R6/lib -lX11" perl Makefile.PL
85 Which simply sets the environment variables for the extra libraries
86 to include the X libraries (which we do not use at all, but must
87 included since libgif has been linked with it).
89 Otherwise you could just build giflib without any X11 dependencies:
91 # must be a clean tree
93 ./configure --without-x ...
95 Also note that libgif has a few bugs: You can run something like
97 $ perl -Iblib/lib -Iblib/arch t/t105gif.t
99 This way you can see what comments the test script prints out.
100 t/t105gif.t checks for an bug in libgif and prints out a patch
101 if that bug is present, note that this bug only affects the more
102 "advanced" features of libgif.
104 If for some reason you have libungif-devel package installed but
105 not libungif on RedHat then you will probably get lots of errors
106 like undefined symbol: FreeSavedImages when running make test.
107 Install libungif package to fix it.
109 Stock libungif 4.1.4 or later seems to fix all of the bugs, if you
110 have a problem that version of linungif (or later), let us know and
113 Imager needs to have a libtiff version of at least 3.5.5, but you
114 should use a later version since some noticable bugs have been fixed.
116 For now you can either configure Imager manually (by setting the
117 IM_MANUAL environment variable to 1, in sh:
119 $ IM_MANUAL=1 perl Makefile.PL
121 and simply say no to tiff support when asked if you want it, the same thing
122 can be used to circumvent problems in gifs to get Imager going.
124 If it worked just continue with the installation as normally
127 Freetype 1.x vs Freetype 2.x
128 ----------------------------
130 These two libraries have some conflicting include file names, but as
131 long as you don't put the Freetype 2.x freetype.h directory in the
132 include path it should all work.
134 Put the directory containing ft2build.h in the include path, but not
135 the directory containing the freetype 2.x freetype.h.
137 If you see compilation errors from font.c you've probably made the
138 mistake of putting the Freetype 2.x freetype.h directory into the
141 To see which directories should be in the include path, try:
143 freetype-config --cflags
145 Ideally, freetype-config should be in the PATH when building Imager
146 with freetype 2.x support.
149 Macintosh dfont and suitcase font support
150 -----------------------------------------
152 Through Freetype 2.1, Imager can use Macintosh DFON (.dfont) fonts and
155 If you want to be able to use more than just the first face in the
156 font file though, you will need to configure freetype2 with the
157 --with-old-mac-fonts option:
159 ./configure --with-old-mac-fonts
161 You can use the index option to get to the other font faces in the
164 # get the second face from $file
165 my $font = Imager::Font->new(file=>$file, index=>1)
166 or die Imager->errstr;
168 If you're using a suitcase font, you will also need to force the use
169 of freetype 2 with the type argument:
171 my $font = Imager::Font->new(file=>$suitcase, type=>'ft2', index=>$index)
172 or die Imager->errstr;
175 ========================
176 3. External dependencies
177 ========================
179 Some hints about getting the Imager module to find the libraries it
180 needs for specific features.
182 Most Linux distributions pre-package these. For each library I've
183 listed the Debian and Redhat package names.
185 For Debian or Debian based system, such as Ubuntu, you would run:
187 aptitude install package-name
191 apt-get install package-name
193 at a root shell (or via sudo).
197 apt-get install libjpeg62-dev
199 For a Redhat based system such as CentOS or Fedora you would run:
201 yum install package-name
207 yum install libjpeg-devel
209 I strongly recommend using your distribution's packages if possible,
210 this will mean any security updates to those packages will be applied
211 when you install security updates.
216 http://www.ijg.org/files/
217 ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz
219 Provides read and write access to JPEG images.
225 to install the development headers and libraries before attempting to
228 Debian: libjpeg62-dev
229 Redhat: libjpeg-devel
234 http://www.libpng.org/pub/png/libpng.html
236 Provides read and write access to PNG images.
238 You also need zlib to use png: http://www.gzip.org/zlib/ We have
239 encountered problems with libpng 1.0.1, which were fixed in 1.0.5
240 Note: you should probably be using zlib 1.1.4, since 1.1.3 has a
241 potential security problem.
249 http://sourceforge.net/projects/giflib/
251 Provides read and write access to GIF images.
253 giflib/libungif has come a long way since the buggy versions available
254 when Imager's gif support code was written. Preferably you should get
255 at least version 4.1.4. If you have a recent Linux distribution you
256 should be safe with whatever giflib it provides, but if you're
257 building from source, please try to use the latest version.
259 With the expiration of the LZW patent there's no reason to use
262 libgif 4.1.4 has no problems known to me at this point.
270 http://www.remotesensing.org/libtiff/
272 Provides read and write access to TIFF images.
274 Note: libtiff 3.9.0 shouldn't be used due to a bug in
275 TIFFWriteDirectory().
278 Redhat: libtiff-devel
283 http://www.t1lib.org/
284 ftp://sunsite.unc.edu/pub/Linux/libs/graphics/
286 Support for text drawing with Type 1 Postscript fonts.
291 3.6 Freetype 2.x (libfreetype)
292 ------------------------------
294 http://www.freetype.org/
296 Support for text drawing with a large number of font formats,
297 including Truetype, Type 1, Opentype and some bitmap formats.
299 Debian: libfreetype6-dev
300 Redhat: freetype-devel
302 3.7 Freetype 1.x (libttf)
303 -------------------------
305 http://www.freetype.org/
307 Support for text drawing with Truetype fonts.
309 This library has been superceded by Freetype 2, and some Linux
310 distributions are phasing it out.
313 Redhat: freetype1-devel
318 Precompiled versions of some of the libraries might be found at:
322 http://www.bullfreeware.com/
326 http://www.sunfreeware.com/
328 ========================
329 4. Logging and debugging
330 ========================
332 Logging is compiled in by default - if you should want to get of it
333 from the binaries you can do so by setting the env IMAGER_NOLOG
334 to something. If you want to enable malloc debugging to check for leaks
335 then set IMAGER_DEBUG_MALLOC to something. Needless to say it is
336 pretty pointless to have malloc debug enabled with no logging since you
337 can never see the malloc information that way.
344 Imager can be installed on Win32 systems. This was ported and tested
345 with Microsoft Visual C++ 6.0 with build 623 of ActivePerl. You can
346 use all of the features of Imager. You can also use Win32 GDI fonts
347 directly by supplying the 'face' parameter to Imager::Font->new(...).
349 I've tested with MSVC++ 6.0, cygwin (perl 5.6.1) and gcc (MinGW).
351 If you see an error under cygwin during testing along the lines of:
353 C:\cygwin\bin\perl.exe: *** unable to remap C:\cygwin\...some dll to the
354 same address as parent (0x...) != 0x....
356 you will need to install the cygwin rebase package and run:
360 If you get errors from your make tool, make sure you're using the same
361 make that was used to build your perl - generally GNU make for cygwin,
362 nmake for Visual C/C++ and dmake for MinGW.
364 Imager and all of the libraries it requires are supplied with
371 Building Imager under OS X is generally straightforward. There are
372 some exceptions though:
374 a) you may find to need to ranlib library files in place after you've
375 installed them, for example:
377 ranlib /usr/local/lib/libgif.a
379 b) the version of GCC enabled by default on OS X 10.4 generates
380 incorrect code for some functions. To work around this run:
384 before building Imager and:
388 after building Imager.
390 This problem exhibits itself as test failures in t/t20fill.t
392 Imager 0.56 includes a workaround for this problem, but I wasn't
395 c) if you want to build GCC 4.0 from scratch and use that you will
396 need to adjust the command-line supplied during the link stage, so
397 that there is some other option before the -bundle option.
401 perl Makefile.PL LDDLFLAGS="`perl -MConfig -e 'print "-g $Config{lddlflags}"'`"
403 =======================
404 7. General information
405 =======================
407 The Imager module homepage is currently at:
409 http://imager.perl.org/
411 You can report bugs by pointing your browser at:
413 https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Imager
415 ========================
417 ========================
421 Claes Jacobson ( Claes )
422 Philip Gwyn ( Leolo )
423 Michael Slade ( Micksa )
425 Brad Murray ( HalfJack )
426 Nicholas Dronen ( Veblen )
427 Michael G Schwern ( Schwern )
428 Rocco Caputo ( Dngor )
429 Graham barr ( Gbarr )
430 Mark-Jason Dominus ( Mjd )
432 Jason Alexander ( Jalex )
433 Randal R. Schwartz ( Merlyn )
435 Artur Bergman ( Sky )
436 Luc St-Louis ( Lucs )
438 Roderick Schertler ( Roderick )
439 Nathan Torkington ( gnat )
442 (and just to play it safe) all those I forgot to mention.