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TIFF-to-PNM converter and png22pnm, a PNG-to-PNM converter
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tif22pnm: TIFF-to-PNM converter and png22pnm, a PNG-to-PNM converter This is the README for tif22pnm.c. by email@example.com at Sun Apr 14 22:56:35 CEST 2002 Tue Jun 11 18:10:35 CEST 2002 v0.06 at Mon Oct 7 01:35:40 CEST 2002 v0.09 at Fri Jan 17 19:38:29 CET 2003 tif22pnm is a command line utility that converts between TIFF sampled images and PNM images (both directions), using the libtiff library, but not using NetPBM. tif22pnm is similar to tifftopnm utility in the NetPBM distribution, but tif22pnm handles a wider range of TIFF files and it is able to output the alpha channel as a PBM or PGM file. png22pnm, a converter from PNG to PNM is also bundled into the distribution. Caveat: tif22pnm v0.07 contains >1000 lines of untested code. The author wants to improve the software, and he welcomes bug reports. The author has tested v0.07 with around 20 very different input files, and it worked. More thorough testing seems to be necessary. Unique advantages (over any other TIFF to PNM converter): -- handles all kinds of compressed TIFF files libtiff can cope with (tifftopnm doesn't) -- handles all kinds of compressed TIFF files GIMP 1.3 can cope with, plus more (tifftopnm, GIMP 1.3 doesn't) -- handles all kinds of color spaces libtiff can cope with (tifftopnm doesn't) -- handles TIFF/JPEG input files correctly (tifftopnm doesn't, GIMP 1.0 doesn't, xv doesn't, ImageMagick doesn't, GIMP 1.3 does) -- automatically writes a smaller file (PBM < PGM < PPM) if image pixels make it possible Compilation under UNIX ~~~~~~~~~~~~~~~~~~~~~~ ./configure ./do.sh compile Compilation under Win32 ~~~~~~~~~~~~~~~~~~~~~~~ To compile tif22pnm.exe and png22pnm.exe, the Win32 equivalents of the UNIX utilities tif22pnm and png22pnm, you have to install these build dependencies first: -- MinGW and MSYS, available from http://www.mingw.org -- libz (zlib) for MinGW libjpeg for MinGW libtiff for MinGW libpng for MinGW Get them from: http://jrfonseca.dyndns.org/projects/gnu-win32/software/ported/index.html http://gnuwin32.sourceforge.net/packages.html http://sourceforge.net/project/showfiles.php?group_id=23617&release_id=63473 To build a self-contained .exe files, you'll need the appropriate .a files: libz.a libpng.a libjpeg.a libtiff.a Most of the libraries create only the .dll files properly, and create the .a file that doesn't work without the .dll. To overcome this, watch which commands were used during the build to create the dll, and run `ar cr' to create the .a file manually. For example, recognise the command gcc -shared -o libpng.a -Wl,--out-implib,libpng.a -Wl,--enable-auto-image png.o pngerror.o pngget.o pngmem.o pngpread.o pngread.o pngrio.o pngrtran.o pngrutil.o pngset.o pngtrans.o pngwio.o pngwrite.o pngwtran.o pngwutil.o -lz and execute this afterwards: ar cr libpng.a png.o pngerror.o pngget.o pngmem.o pngpread.o pngread.o pngrio.o pngrtran.o pngrutil.o pngset.o pngtrans.o pngwio.o pngwrite.o pngwtran.o pngwutil.o If the .a file is smaller than the sum of the .o files, or it contains the name of a .dll with a similar name, simply forget about it. Never ever run ranlib! Copy *.h to the MinGW directory containing _mingw.h. Copy *.a to the directory containing libcrtdll.a To build tif22pnm and png22pnm: 1. Install all the build dependencies. 2. Open the MSYS terminal window from the start menu. 3. Run `explorer .' to figure out what is the current working directory. Let's call this directory the MSYS home. 4. Download the tif22pnm sources into the MSYS home: http://www.inf.bme.hu/~pts/tif22pnm-latest.tar.gz 5. Unpack the sources. Run: tar xzvf tif22pnm-latest.tar.gz 6. Run `cd tif22pnm-*.*' to enter the tif22pnm source directory. It should contain a newer version of this README and the file tif22pnm.c. 7. Run export CC='gcc -static' # to build standalone .exe files ./configure Verify that both libtiff and libpng are found. If not, examine config.log, and copy the *.a and *.h files from the libraries to a place where gcc will find them. 8. Run sh ./do.sh compile 9. The files tif22pnm.exe and png22pnm.exe are now created in the current directory. Use them. You may copy them to another directory right now: cp *22pnm.exe 'C:\Program Files' 10. You should invoke *22pnm.exe from the command line (COMMAND.COM or CMD.EXE) with the _appropriate_ arguments, described elsewhere in this document. Don't put it into the Start menu, it won't work (a window will flash in, showing an error message that you haven't supplied the right arguments). 11. The cjpeg.exe and djpeg.exe are useful utilities found in the libjpeg distribution (which you've installed anyway, because libtiff needs it). Goal ~~~~ The author wants tif22pnm to be able to read a vide range of image formats (not just TIFF and PNM), including corrupted image files. In the future tif22pnm should support many output formats, but only few compression methods. If you want tight output and full PostScript and PDF support, please try sam2p: http://www.inf.bme.hu/~pts/sam2p/ Installation ~~~~~~~~~~~~ As root, cp tif22pnm /usr/local/bin Usage ~~~~~ $ tif22pnm This is tif22pnm v0.07: TIFF <-> PNM converter, by firstname.lastname@example.org Usage: ./tif22pnm [options] [--] in.img [out.img] Options are: -headerdump -rgb opaque RGB, alpha associated to black background (default) -rgbi RGB, ignore alpha -rgba RGB with associated alpha (black background) -rgbu RGB with unassociated alpha -onlya alpha, ignore RGB -text Legal stuff ~~~~~~~~~~~ This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA __END__