Build pano12 from sourcecode
- 1 Building PANO12.DLL for Windows
- 1.1 Set-up the build environment
- 1.2 Download the source-code
- 1.3 Build everything
- 1.4 Finishing up
- 1.5 Further tasks
Building PANO12.DLL for Windows
I'm no Windows expert, this tutorial is the first time I used these tools to build software, so if I can do it, so can you.
The purpose of this exercise is to roll your own version of the pano12 Panorama Tools library. You might want to do this for fun, to play with extending the code, fixing bugs or simply to remove the Field of View restrictions on fisheye input images.
Set-up the build environment
To start you need a Free C compiler and associated tools, so Download MinGW and MSYS. I grabbed the "Windows Installer" versions: MinGW-4.1.1.exe and MSYS-1.0.10.exe.
The first one is the "Minimalist Gnu for Windows", it provides a win32 version of the GNU compiler and related tools.
The second is a "Minimal SYStem", this provides a POSIX environment. Answer yes to the questions and enter the directory where you installed MinGW when asked:
Download the source-code
First you need panorama tools itself, so [http://sourceforge.net/project/showfiles.php?group_id=96188 download pano12 sourcecode], I downloaded libpano12-184.108.40.206.zip.
You also need the sourcecode for the various libraries required by pano12, these are zlib, libpng, [http://www.ijg.org/ libjpeg] and libtiff. There is no longer any need to download the Java development kit as MinGW now includes a Free version.
I downloaded zlib123.zip, lpng128.zip, jpegsr6.zip and tiff-3.7.4.zip (I would normally download the .tar.gz versions, but Windows seems to have some kind of .zip extractor built-in so I thought I'd try that).
Extract the files into directories called libpano12, zlib, libpng, libjpeg and libtiff.
The default MSYS home on this system is C:\msys\1.0\home\Bruno, so I put these directories in there.
Double-click MSYS and you should get a small window with a command-line, this is a POSIX shell.
The following commands need to be typed into the shell. If you make a mistake, just type cd to return to your home and try again.
Compilation results in lots of text scrolling very fast up the screen, ignore any warnings, but error messages will give you a clue when things are not working properly.
cd zlib ./configure make make install cd
cd libpng cp scripts/makefile.gcc Makefile make cp png.h /usr/local/include cp pngconf.h /usr/local/lib cp libpng.a /usr/local/lib cd
cd libjpeg ./configure make make install make install-lib make install-headers cd
cd libtiff ./configure --disable-shared make make install cd
For some reason, the libtiff.la file prevents pano12 from linking properly, so delete it:
cd libpano12 ./configure make make install
This final step will create the binaries in this directory:
The files can be stripped to remove unused symbols - This isn't necessary, but it does make them smaller:
strip /usr/local/bin/pano12.dll strip /usr/local/bin/panoinfo.exe strip /usr/local/bin/PTOptimizer.exe
Now just copy them to whichever location they are needed to run your application.
Of course, the reason you are rolling your own is in order to make modifications or to try out the latest code, so here are some suggestions:
Increasing the fisheye field-of-view restriction
This is the MAX_FISHEYE_FOV constant in the filter.h file (which defaults to 160 degrees), increase it to something larger like 720. Then rebuild the library:
make make install
You will need a decent text editor to change sourcecode, Notepad or Word will not do.
Getting the latest CVS version
CVS is a source-code management system that allows multiple users to share the same set of files online.
You need a CVS client in order to checkout the code, so Download the MSYS Developers Toolkit which is part of MinGW (I grabbed the msysDTK-1.0.1.exe installer).
Instructions for getting the code are on the [http://panotools.sourceforge.net panotools sourceforge site], but it is usually as simple as typing this into the shell:
cvs -d:pserver:firstname.lastname@example.org:/cvsroot/panotools login cvs -z3 -d:pserver:email@example.com:/cvsroot/panotools co libpano
(Hit enter when asked for a password)
This will create a directory containing the latest code called libpano (which you may rename).