> I wonder how IJS is used and implemented in HPLIP/HPIJS. > > According to what I find under prnt/hpijs it seems > HPLIP/HPIJS has its own IJS sources and finally all is linked > together into /usr/bin/hpijs (e.g. hpijs-ijs_server.o and > hpijs-ijs.o).
yes, this is correct > If I am right, I wonder why HPLIP/HPIJS does not use the > system header files for IJS /usr/include/ijs/ijs.h > /usr/include/ijs/ijs_client.h /usr/include/ijs/ijs_server.h > and then links (dynamically) with /usr/lib/libijs.so like the > Gutenprint/Gimp-Print IJS drivers (/usr/bin/ijsgutenprint.5.0 > and /usr/bin/ijsgimpprint) do. This is done historically because HPIJS was distributed before libijs.so was established and the IJS code is very small. > E.g. we provide in our ghostscript-library package the IJS > headers and libijs.so and the /usr/bin/ijs-config script > which can be used to get information about the installed > version of IJS during compile time of HPLIP/HPIJS via the > configure script. > > Is there a special reason why HPLIP/HPIJS has its own IJS sources? As far as I remember we are running IJS 0.35 unchanged, I would have to double check that. > Couldn't there be compatibility problems if there is a major > IJS version upgrade in Ghostscript? > Or are such problems of less importance than other problems > which are the reason that HPLIP/HPIJS has its own IJS sources? The IJS specification has been very stable. The reason I hesitate to convert to libijs.so is because HPIJS has been tested as a IJS 0.35 server and linking to the local IJS source code assures 0.35 runtime functionality. If the IJS specification does change, I would hope it would be backward compatible. -dave ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ HPLIP-Devel mailing list HPLIP-Devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hplip-devel
