libvips/include/vips/history.h

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2007-08-29 18:23:50 +02:00
/* @(#) Useful macros for appending one line in the History field of the
* @(#) output image descriptor when a function is called
* @(#) The main program should use im_updatehist()
* @(#) The added line corresponds to the command relevant to the function
* @(#) for instance
* @(#) for the function: im_add(in1, in2, out) the following lines of code can
* @(#) be used to add a line of history in the Hist member
* @(#) of the out image descriptor
* @(#) ....
* @(#) IMAGE *in1, *in2, *out;
* @(#) ....
* @(#) if ( im_add(in1, in2, out) == -1 ) return(-1);
* @(#) if ( IM_ADD(in1, in2, out) == -1 ) return(-1);
* @(#) ....
* @(#)
* @(#) The first function will add the two images in1 and in2,
* @(#) whereas the second call will append
* @(#) at the history descriptor of out the line:
* @(#) add infile outfile # date
* @(#) where infile is in.filename and outfile is out.filename
* @(#) The history line has been prepared in such a way that the first
* @(#) argument is the UNIX command which corresponds to the function
* @(#) As a general rule, all functions in im_funcs directory which
* @(#) have a correponding command in src directory are listed here
* @(#)
* @(#) Since the macros presented in this file correspond to the function
* @(#) im_histlin() the returned value is 0 on success and -1 on error.
* @(#)
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/* Made obsolete by the function database stuff ... just here in case anyone
* still includes it.
*/