237 lines
5.3 KiB
C
237 lines
5.3 KiB
C
/* create an IMAGE
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*
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* Copyright: Nicos Dessipris & Kirk Martinez, 1990
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* Written on: 13/02/1990
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* Modified on : 3/6/92 22/2/93
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* 15/4/93 J.Cupitt
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* - init for partial image buffers added
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* - init for type field
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* - filename added
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* 10/5/93 J.Cupitt
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* - allocates space for IMAGE too, and returns new data
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* 23/2/94 JC
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* - ANSIfied, man page revised
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* 16/8/94 JC
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* - evalend callbacks added
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* 28/11/94 JC
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* - new compression fields added, thr added
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* 24/10/95 JC
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* - now tracks open images ... see also im_close() and debug.c
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* 1/12/04 JC
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* - added an im_init_world() to help old progs
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* 30/9/05
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* - added sizeof_header
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* 2/1/07
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* - init magic
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* - init history_list
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* 7/11/07
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* - added preclose and evalstart
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* 9/8/08
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* - lock global image list (thanks lee)
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* 19/3/09
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* - add file_length
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* 8/10/09
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* - add set_hint
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* 10/1/09
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* - added postclose
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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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/*
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#define DEBUG_NEW
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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 <vips/vips.h>
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#include <vips/debug.h>
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#include <vips/thread.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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/* Make a new IMAGE structure, set fields to an initial state. We set the
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* filename field only.
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*/
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IMAGE *
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im_init( const char *filename )
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{
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IMAGE *im;
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/* Pass in a nonsense name for argv0 ... this init world is only here
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* for old programs which are missing an im_init_world() call. We must
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* have threads set up before we can process.
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*/
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if( im_init_world( "vips" ) )
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im_error_clear();
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if( !(im = IM_NEW( NULL, IMAGE )) )
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return( NULL );
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#ifdef DEBUG_NEW
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printf( "im_init: new IMAGE 0x%p, \"%s\"\n", im, filename );
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#endif /*DEBUG_NEW*/
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im->Xsize = -1;
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im->Ysize = -1;
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im->Bands = -1;
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im->Bbits = -1;
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im->BandFmt = -1;
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im->Coding = -1;
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im->Type = -1;
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im->Xres = 1.0;
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im->Yres = 1.0;
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im->Length = 0;
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im->Compression = 0;
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im->Level = 0;
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im->Xoffset = 0;
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im->Yoffset = 0;
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im->Hist = NULL;
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im->data = NULL;
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im->time = NULL;
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im->kill = 0;
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im->dtype = IM_NONE;
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im->fd = -1;
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im->baseaddr = NULL;
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im->length = 0;
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im->closefns = NULL;
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im->evalfns = NULL;
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im->evalendfns = NULL;
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im->closing = 0;
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im->close_pending = 0;
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/* Default to native order.
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*/
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im->magic = im_amiMSBfirst() ? IM_MAGIC_SPARC : IM_MAGIC_INTEL;
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im->start = NULL;
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im->generate = NULL;
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im->stop = NULL;
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im->client1 = NULL;
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im->client2 = NULL;
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im->sslock = g_mutex_new();
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im->regions = NULL;
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im->dhint = IM_SMALLTILE;
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im->Meta = NULL;
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im->Meta_traverse = NULL;
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/* Default to the VIPS header size. Can be changed later.
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*/
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im->sizeof_header = IM_SIZEOF_HEADER;
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im->windows = NULL;
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im->parents = NULL;
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im->children = NULL;
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im->serial = 0;
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im->history_list = NULL;
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im->progress = NULL;
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im->evalstartfns = NULL;
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im->preclosefns = NULL;
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im->invalidatefns = NULL;
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im->file_length = 0;
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im->hint_set = FALSE;
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im->postclosefns = NULL;
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if( !(im->filename = im_strdup( NULL, filename )) ) {
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im_close( im );
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return( NULL );
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}
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g_mutex_lock( im__global_lock );
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im__open_images = g_slist_prepend( im__open_images, im );
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g_mutex_unlock( im__global_lock );
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return( im );
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}
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/**
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* im_initdesc:
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* @image: image to init
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* @xsize: image width
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* @ysize: image height
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* @bands: image bands
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* @bandbits: ignored, just here for compatibility
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* @bandfmt: band format
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* @coding: image coding
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* @type: image type
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* @xres: horizontal resolution, pixels per millimetre
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* @yres: vertical resolution, pixels per millimetre
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* @xo: x offset
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* @yo: y offset
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*
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* A convenience function to set the header fields after creating an image.
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* Normally you copy the fields from one of your input images with
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* im_cp_desc() and then make
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* any adjustments you need, but if you are creating an image from scratch,
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* for example im_black() or im_jpeg2vips(), you do need to set all the
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* fields yourself.
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*
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* See also: im_cp_desc().
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*/
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void
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im_initdesc( IMAGE *image,
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int xsize, int ysize, int bands, int bandbits,
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VipsBandFmt bandfmt, VipsCoding coding, VipsType type,
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float xres, float yres,
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int xo, int yo )
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{
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image->Xsize = xsize;
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image->Ysize = ysize;
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image->Bands = bands;
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/* bandbits is deprecated ... set to whatever the format requires.
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*/
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image->Bbits = im_bits_of_fmt( bandfmt );
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image->BandFmt = bandfmt;
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image->Coding = coding;
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image->Type = type;
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image->Xres = xres;
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image->Yres = yres;
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image->Xoffset = xo;
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image->Yoffset = yo;
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}
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