Build pano12 from sourcecode
- 1 Building PANO12.DLL for Windows
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 compile the panotools.
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 download pano12 sourcecode, I downloaded libpano12-22.214.171.124.zip.
You also need the sourcecode for the various libraries required by pano12, these are zlib, libpng, 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-v3.5.7.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). Note that I had trouble with a later version of libtiff, tiff-v3.5.7 is the one that worked for me.
Extract the files into directories called libpano12, zlib, libpng, libjpeg and libtiff.
If you want to create LZW compressed TIFF files with PTmender, then download libtiff-lzw-compression-kit-1.5.tar.gz, extract the tif_lzw.c file and overwrite the one supplied in this old version of 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/include cp libpng.a /usr/local/lib cd
cd libjpeg ./configure make make install make install-lib make install-headers cd
cd libtiff ./configure make cp libtiff/*.h /usr/local/include cp libtiff/*.a /usr/local/lib cd
cd libpano12 ./configure make make install cd
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 etc...
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.