1 ================================================================
2 Copyright (c) 1999-2001 Arnar M. Hrafnkelsson. All rights reserved.
3 This program is free software; you can redistribute it and/or
4 modify it under the same terms as Perl itself.
5 ================================================================
7 >> THIS SOFTWARE COMES WITH ABSOLUTELY NO WARRANTY WHATSOEVER <<
8 If you like or hate Imager, please let us know by sending mail
9 to imager@imager.perl.org
11 ================================================================
14 ========================
15 1. Patent infringements?
16 ========================
18 Imager as such contains no patented algorithms. The external
19 libraries (which are not written by me) may or may not contain
20 patented algorithms. YOU ARE SOLELY RESPONSIBLE FOR OBTAINING
21 LICENSE(S) TO USE SUCH LIBRARIES SHOULD YOU NEED ANY.
24 ========================
25 2. Compiling and testing
26 ========================
28 Some care has been taken to make the installation as smooth as
29 possible. This is rather hard due to the difference between operating
30 systems and site setups. To get started just type
34 It should blurb out a list of which libraries were found and which
35 not. If you add a library to the machine after installing Imager it
36 does not automatically become available in Imager. It only uses the
37 libraries that are found. If the list of found libraries is not what
38 you expected, then the Makefile.PL is either not searching in the
39 right directories or your box does not have the libraries you think it
40 does. For a list of where to get the libraries have a look at
41 3. External dependencies. To widen the search path for libraries and
42 include files set the IM_INCPATH and IM_LIBPATH variables. The
43 environment variables that matter when Makefile.PL is run are
45 IM_INCPATH colon separated list of paths to extra include files
46 IM_LIBPATH colon separated list of paths to extra library files
48 IM_VERBOSE turns on verbose mode for the library scanning and such
49 IM_MANUAL to manually select which libraries are used and which not
50 IM_NOLOG if true logging will not be compiled into the module
51 IM_DEBUG_MALLOC if true malloc debugging will be compiled into the module
52 do not use IM_DEBUG_MALLOC in production - this slows
55 IM_CFLAGS Extra flags to pass to the compiler
56 IM_LFLAGS Extra flags to pass to the linker
57 IM_DFLAGS Extra flags to pass to the preprocessor
61 When finding the libraries has been sorted out it's time for
65 and if that works then do
69 If either fails do take a peek at the file errep.perl. It's creates a
70 file report.txt. This is some information which will help me discover
71 where the problem is so I can try to fix it in future releases. If
72 you find running it ok (just remember - no warranty!) please send the
73 report.txt via email to addi@umich.edu .
77 A common problem is that libgif/libungif are sometimes linked to the X
78 libraries and then running the tests fails. In that case something
81 $ IM_LFLAGS="-L/usr/X11R6/lib -lX11" perl Makefile.PL
83 Which simply sets the environment variables for the extra libraries
84 to include the X libraries (which we do not use at all, but must
85 included since libgif has been linked with it).
87 Otherwise you could just build giflib without any X11 dependencies:
89 # must be a clean tree
91 ./configure --without-x ...
93 Also note that libgif has a few bugs: You can run something like
95 $ perl -Iblib/lib -Iblib/arch t/t105gif.t
97 This way you can see what comments the test script prints out.
98 t/t105gif.t checks for an bug in libgif and prints out a patch
99 if that bug is present, note that this bug only affects the more
100 "advanced" features of libgif.
102 If for some reason you have libungif-devel package installed but
103 not libungif on RedHat then you will probably get lots of errors
104 like undefined symbol: FreeSavedImages when running make test.
105 Install libungif package to fix it.
108 Imager needs to have a libtiff version of at least 3.5.5. In the
109 future we might consider supporting older libtiff versions. For
110 now you can either configure Imager manually (by
111 setting the IM_MANUAL environment variable to 1, in sh:
113 $ IM_MANUAL=1 perl Makefile.PL
115 and simply say no to tiff support when asked if you want it, the same thing
116 can be used to circumvent problems in gifs to get Imager going.
119 If it worked just continue with the installation as normally
122 ========================
123 3. External dependencies
124 ========================
126 Some hints about getting the Imager module to find the libraries it
127 needs for specific features. The libraries it uses are:
129 jpeg: ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz
131 png: ftp://ftp.uu.net/graphics/png
132 you also need zlib to use png: ftp://ftp.uu.net/pub/archiving/zip/zlib
133 We have encountered problems with libpng 1.0.1, which were fixed in 1.0.5
135 gif: http://www.arrakeen.demon.co.uk/giflib/
136 or at: http://prtr-13.ucsc.edu/~badger/software/libungif/index.shtml
138 The default giflib is buggy in rarely used code, you can find a patch
139 to fix the worst of the problems at:
141 http://www.develop-help.com/imager/giflib.patch
143 tiff: http://www.libtiff.org/
145 t1: ftp://ftp.neuroinformatik.ruhr-uni-bochum.de/pub/software/t1lib/
146 or at: ftp://sunsite.unc.edu/pub/Linux/libs/graphics/
148 tt: http://www.freetype.org/
151 Precompiled versions of some of the libraries might be found at:
155 ftp://ftp.rge.com/pub/systems/aix/bull/
159 ========================
160 4. Logging and debugging
161 ========================
163 Logging is compiled in by default - if you should want to get of it
164 from the binaries you can do so by setting the env IMAGER_NOLOG
165 to something. If you want to enable malloc debugging to check for leaks
166 then set IMAGER_DEBUG_MALLOC to something. Needless to say it is
167 pretty pointless to have malloc debug enabled with no logging since you
168 can never see the malloc information that way.
171 ========================
172 5. Truetype information
173 ========================
175 If you enable the truetype part and want it to be TESTED you MUST set
176 the environment variable TTFONTTEST to a complete path to a truetype
184 Imager can be installed on Win32 systems. This was ported and tested
185 with Microsoft Visual C++ 6.0 with build 623 of ActivePerl. You can
186 use all of the features of Imager. You can also use Win32 GDI fonts
187 directly by supplying the 'face' parameter to Imager::Font->new(...).
189 I've tested with both MSVC++ 6.0 and cygwin (perl 5.6.1).
191 If you have any problems with the Win32 support, please email
192 tony@develop-help.com (don't forget to use nmake instead of make).
194 =======================
195 7. General information
196 =======================
198 The Imager module homepage is currently at:
200 http://www.eecs.umich.edu/~addi/perl/Imager/
202 The current docs are rather bad as I've been busy adding features
203 but hopefully they will be updated soon. Until then you'll just
204 have to use the source. The test scripts might also be a good idea.
205 By activating the the #init_log lines in the test script you can get
206 rather verbose debugging output from the C code.
209 ========================
211 ========================
215 Claes Jacobson ( Claes )
216 Philip Gwyn ( Leolo )
217 Michael Slade ( Micksa )
219 Brad Murray ( HalfJack )
220 Nicholas Dronen ( Veblen )
221 Michael G Schwern ( Schwern )
222 Rocco Caputo ( Dngor )
223 Graham barr ( Gbarr )
224 Mark-Jason Dominus ( Mjd )
226 Jason Alexander ( Jalex )
227 Randal R. Schwartz ( Merlyn )
229 Artur Bergman ( Sky )
230 Luc St-Louis ( Lucs )
232 Roderick Schertler ( Roderick )
233 Nathan Torkington ( gnat )
235 (and just to play it safe) all those I forgot to mention.