1 ================================================================
2 Copyright (c) 1999-2004 Arnar M. Hrafnkelsson. All rights reserved.
3 Copyright (c) 2004-2006 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. In the
114 future we might consider supporting older libtiff versions. For
115 now you can either configure Imager manually (by
116 setting the IM_MANUAL environment variable to 1, in sh:
118 $ IM_MANUAL=1 perl Makefile.PL
120 and simply say no to tiff support when asked if you want it, the same thing
121 can be used to circumvent problems in gifs to get Imager going.
123 If it worked just continue with the installation as normally
126 Freetype 1.x vs Freetype 2.x
127 ----------------------------
129 These two libraries have some conflicting include file names, but as
130 long as you don't put the Freetype 2.x freetype.h directory in the
131 include path it should all work.
133 Put the directory containing ft2build.h in the include path, but not
134 the directory containing the freetype 2.x freetype.h.
136 If you see compilation errors from font.c you've probably made the
137 mistake of putting the Freetype 2.x freetype.h directory into the
140 To see which directories should be in the include path, try:
142 freetype-config --cflags
145 Macintosh dfont and suitcase font support
146 -----------------------------------------
148 Through Freetype 2.1, Imager can use Macintosh DFON (.dfont) fonts and
151 If you want to be able to use more than just the first face in the
152 font file though, you will need to configure freetype2 with the
153 --with-old-mac-fonts option:
155 ./configure --with-old-mac-fonts
157 You can use the index option to get to the other font faces in the
160 # get the second face from $file
161 my $font = Imager::Font->new(file=>$file, index=>1)
162 or die Imager->errstr;
164 If you're using a suitcase font, you will also need to force the use
165 of freetype 2 with the type argument:
167 my $font = Imager::Font->new(file=>$suitcase, type=>'ft2', index=>$index)
168 or die Imager->errstr;
171 ========================
172 3. External dependencies
173 ========================
175 Some hints about getting the Imager module to find the libraries it
176 needs for specific features. The libraries it uses are:
178 jpeg: http://www.ijg.org/files/
179 ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz
181 ftp.uu.net is still linked from many places, including the Independent
182 JPEG Groups's home page, but it is non-functional.
184 png: http://www.libpng.org/pub/png/libpng.html
186 you also need zlib to use png: http://www.gzip.org/zlib/
187 We have encountered problems with libpng 1.0.1, which were fixed in 1.0.5
188 Note: you should probably be using zlib 1.1.4, since 1.1.3 has a
189 potential security problem.
191 gif: http://sourceforge.net/projects/libungif
193 giflib/libungif has come a long way since the buggy versions available
194 when Imager's gif support code was written. Preferably you should get
195 at least version 4.1.4. If you have a recent Linux distribution you
196 should be safe with whatever giflib it provides, but if you're
197 building from source, please try to use the latest version.
199 libgif 4.1.4 has no problems known to me at this point.
201 tiff: http://www.libtiff.org/
203 t1: http://www.ibiblio.org/pub/Linux/libs/graphics/
206 tt: http://www.freetype.org/
208 Precompiled versions of some of the libraries might be found at:
211 http://www.bullfreeware.com/
215 ========================
216 4. Logging and debugging
217 ========================
219 Logging is compiled in by default - if you should want to get of it
220 from the binaries you can do so by setting the env IMAGER_NOLOG
221 to something. If you want to enable malloc debugging to check for leaks
222 then set IMAGER_DEBUG_MALLOC to something. Needless to say it is
223 pretty pointless to have malloc debug enabled with no logging since you
224 can never see the malloc information that way.
231 Imager can be installed on Win32 systems. This was ported and tested
232 with Microsoft Visual C++ 6.0 with build 623 of ActivePerl. You can
233 use all of the features of Imager. You can also use Win32 GDI fonts
234 directly by supplying the 'face' parameter to Imager::Font->new(...).
236 I've tested with both MSVC++ 6.0 and cygwin (perl 5.6.1).
238 If you see an error under cygwin during testing along the lines of:
240 C:\cygwin\bin\perl.exe: *** unable to remap C:\cygwin\...some dll to the
241 same address as parent (0x...) != 0x....
243 you will need to install the cygwin rebase package and run:
247 If you get errors from your make tool, make sure you're using the same
248 make that was used to build your perl - generally GNU make for cygwin,
249 nmake for Visual C/C++ and dmake for MinGW.
255 Building Imager under OS X is generally straightforward. There are
256 some exceptions though:
258 a) you may find to need to ranlib library files in place after you've
259 installed them, for example:
261 ranlib /usr/local/lib/libgif.a
263 b) the version of GCC enabled by default on OS X 10.4 generates
264 incorrect code for some functions. To work around this run:
268 before building Imager and:
272 after building Imager.
274 This problem exhibits itself as test failures in t/t20fill.t
276 c) if you want to build GCC 4.0 from scratch and use that you will
277 need to adjust the command-line supplied during the link stage, so
278 that there is some other option before the -bundle option.
282 perl Makefile.PL LDDLFLAGS="`perl -MConfig -e 'print "-g $Config{lddlflags}"'`"
284 =======================
285 7. General information
286 =======================
288 The Imager module homepage is currently at:
290 http://imager.perl.org/
292 You can report bugs by pointing your browser at:
294 https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Imager
296 ========================
298 ========================
302 Claes Jacobson ( Claes )
303 Philip Gwyn ( Leolo )
304 Michael Slade ( Micksa )
306 Brad Murray ( HalfJack )
307 Nicholas Dronen ( Veblen )
308 Michael G Schwern ( Schwern )
309 Rocco Caputo ( Dngor )
310 Graham barr ( Gbarr )
311 Mark-Jason Dominus ( Mjd )
313 Jason Alexander ( Jalex )
314 Randal R. Schwartz ( Merlyn )
316 Artur Bergman ( Sky )
317 Luc St-Louis ( Lucs )
319 Roderick Schertler ( Roderick )
320 Nathan Torkington ( gnat )
322 (and just to play it safe) all those I forgot to mention.