129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/* @(#) Functions which writes the yth buffer line to either the output file
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* @(#) or the output buffer.
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* @(#) It is the responsibility of the user to create a buffer line
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* @(#) and write the data to it before calling this function.
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* @(#) No checking is carried out for image
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* @(#)
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* @(#) int im_writeline(ypos, image, linebuffer)
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* @(#) int ypos;
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* @(#) IMAGE *image;
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* @(#) char *linebuffer;
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* @(#)
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* @(#) Returns 0 on success and -1 on error
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* @(#)
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*
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* Copyright: Nicos Dessipris
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* Written on: 04/04/1990
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* Modified on :
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* 15/4/93 JC
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* - support for partial images
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* 13/12/93 JC
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* - now triggers eval callbacks for the output image.
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* 26/3/02 JC
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* - better error messages
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* 31/10/03 JC
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* - stop early on kill
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* 7/11/07
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* - add eval start/stop
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /*HAVE_UNISTD_H*/
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#include <errno.h>
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#ifdef HAVE_IO_H
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#include <io.h>
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#endif /*HAVE_IO_H*/
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#include <vips/vips.h>
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#include <vips/internal.h>
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif /*WITH_DMALLOC*/
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int
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im_writeline( int ypos, IMAGE *im, PEL *linebuffer )
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{
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int linesize = IM_IMAGE_SIZEOF_LINE( im );
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char *tmp;
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/* Is this the start of eval?
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*/
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if( ypos == 0 )
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im__start_eval( im );
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/* Possible cases for output: FILE or SETBUF.
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*/
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switch( im->dtype ) {
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case IM_SETBUF:
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case IM_SETBUF_FOREIGN:
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tmp = im->data + ypos * linesize;
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memcpy( tmp, linebuffer, linesize );
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break;
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case IM_OPENOUT:
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/* Don't use ypos for this.
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*/
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if( im__write( im->fd, linebuffer, linesize ) )
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return( -1 );
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break;
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default:
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im_error( "im_writeline",
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_( "unable to output to a %s image" ),
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im_dtype2char( im->dtype ) );
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return( -1 );
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}
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/* Trigger evaluation callbacks for this image.
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*/
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if( im__handle_eval( im, im->Xsize, 1 ) )
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return( -1 );
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if( im__test_kill( im ) )
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return( -1 );
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/* Is this the end of eval?
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*/
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if( ypos == im->Ysize - 1 )
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im__end_eval( im );
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return( 0 );
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}
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