161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
/* @(#)
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* @(#) Function which sets up the output as follows
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* @(#) If the output is a buffer, it allocates memory according to image sizes
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* @(#) If the output is a file, it write a header
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* @(#) to the file pointed by image.fd
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* @(#) If the output is a partial image, then `magically' turn this from an
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* @(#) im_partial() image into an im_setbuf() image. If im_setupout() is
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* @(#) called, we take it as a sign that we are dealing with pre-partial
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* @(#) images code.
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* @(#) When exiting, image.fd points at the end of the header info.
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* @(#) expecting raw image data.
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* @(#) No description or history is involved
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* @(#) Called by all im_funcs
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* @(#)
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* @(#) int im_setupout(image)
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* @(#) IMAGE *image;
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* @(#) Returns either 0 (success) or -1 (fail)
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* @(#)
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* Copyright: Nicos Dessipris
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* Written on: 16/01/1990
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* Modified on : 04/04/1990, 28/02/1991
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* 15/4/93 JC
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* - partial image support added
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* 18/6/93 JC
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* - ANSIfied
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* 4/7/01 JC
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* - OPENOUT open delayed until here
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* 21/8/01 ruven
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* - stat/file needed
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* 22/8/05
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* * - less stupid header write
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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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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h>
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#endif /*HAVE_SYS_FILE_H*/
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#include <fcntl.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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/* Open mode for write ... on some systems, have to set BINARY too.
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*/
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#ifdef BINARY_OPEN
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#define MODE (O_WRONLY | O_CREAT | O_TRUNC | O_BINARY)
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#else
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#define MODE (O_WRONLY | O_CREAT | O_TRUNC)
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#endif /*BINARY_OPEN*/
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int
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im_setupout( IMAGE *im )
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{
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g_assert( !im_image_sanity( im ) );
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if( im->Xsize <= 0 || im->Ysize <= 0 || im->Bands <= 0 ) {
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im_error( "im_setupout", _( "bad dimensions" ) );
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return( -1 );
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}
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if( im->dtype == IM_PARTIAL ) {
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/* Make it into a im_setbuf() image.
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*/
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#ifdef DEBUG_IO
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printf( "im_setupout: old-style output for %s\n",
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im->filename );
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#endif /*DEBUG_IO*/
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im->dtype = IM_SETBUF;
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}
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switch( im->dtype ) {
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case IM_MMAPINRW:
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case IM_SETBUF_FOREIGN:
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/* No action.
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*/
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break;
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case IM_SETBUF:
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/* Allocate memory.
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*/
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if( im->data ) {
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/* Sanity failure!
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*/
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im_error( "im_setupout", _( "called twice!" ) );
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return( -1 );
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}
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if( !(im->data = im_malloc( NULL,
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IM_IMAGE_SIZEOF_LINE( im ) * im->Ysize )) )
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return( -1 );
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break;
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case IM_OPENOUT:
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{
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/* Don't use im->sizeof_header here, but we know we're
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* writing a VIPS image anyway.
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*/
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unsigned char header[IM_SIZEOF_HEADER];
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if( (im->fd = open( im->filename, MODE, 0666 )) < 0 ) {
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im_error( "im_setupout",
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_( "unable to write to \"%s\"" ),
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im->filename );
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return( -1 );
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}
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if( im__write_header_bytes( im, header ) ||
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im__write( im->fd, header, IM_SIZEOF_HEADER ) )
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return( -1 );
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break;
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}
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default:
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im_error( "im_setupout", _( "bad image descriptor" ) );
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return( -1 );
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}
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return( 0 );
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}
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