371 lines
9.1 KiB
C
371 lines
9.1 KiB
C
/* load vips from a file
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*
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* 24/11/11
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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., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 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
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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 <glib/gi18n-lib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <vips/vips.h>
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#include <vips/internal.h>
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typedef struct _VipsForeignLoadVips {
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VipsForeignLoad parent_object;
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/* Source to load from (set by subclasses).
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*/
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VipsSource *source;
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} VipsForeignLoadVips;
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typedef VipsForeignLoadClass VipsForeignLoadVipsClass;
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G_DEFINE_ABSTRACT_TYPE( VipsForeignLoadVips, vips_foreign_load_vips,
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VIPS_TYPE_FOREIGN_LOAD );
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static void
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vips_foreign_load_vips_dispose( GObject *gobject )
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{
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VipsForeignLoadVips *vips = (VipsForeignLoadVips *) gobject;
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VIPS_UNREF( vips->source );
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G_OBJECT_CLASS( vips_foreign_load_vips_parent_class )->
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dispose( gobject );
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}
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static VipsForeignFlags
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vips_foreign_load_vips_get_flags_source( VipsSource *source )
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{
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unsigned char *data;
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VipsForeignFlags flags;
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flags = VIPS_FOREIGN_PARTIAL;
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if( vips_source_sniff_at_most( source, &data, 4 ) == 4 &&
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*((guint32 *) data) == VIPS_MAGIC_SPARC )
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flags |= VIPS_FOREIGN_BIGENDIAN;
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return( flags );
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}
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static VipsForeignFlags
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vips_foreign_load_vips_get_flags( VipsForeignLoad *load )
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{
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VipsForeignLoadVips *vips = (VipsForeignLoadVips *) load;
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return( vips_foreign_load_vips_get_flags_source( vips->source ) );
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}
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static VipsForeignFlags
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vips_foreign_load_vips_get_flags_filename( const char *filename )
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{
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VipsSource *source;
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VipsForeignFlags flags;
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if( !(source = vips_source_new_from_file( filename )) )
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return( 0 );
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flags = vips_foreign_load_vips_get_flags_source( source );
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VIPS_UNREF( source );
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return( flags );
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}
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static int
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vips_foreign_load_vips_header( VipsForeignLoad *load )
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{
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( load );
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VipsForeignLoadVips *vips = (VipsForeignLoadVips *) load;
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VipsConnection *connection = VIPS_CONNECTION( vips->source );
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const char *filename;
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VipsImage *image;
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VipsImage *x;
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if( !vips_source_is_file( vips->source ) ||
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!(filename = vips_connection_filename( connection )) ) {
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vips_error( class->nickname,
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"%s", _( "no filename associated with source" ) );
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return( -1 );
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}
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if( !(image = vips_image_new_mode( filename, "r" )) )
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return( -1 );
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/* What a hack. Remove the @out that's there now and replace it with
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* our image.
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*/
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g_object_get( load, "out", &x, NULL );
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g_object_unref( x );
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g_object_unref( x );
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g_object_set( load, "out", image, NULL );
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return( 0 );
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}
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static void
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vips_foreign_load_vips_class_init( VipsForeignLoadVipsClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsOperationClass *operation_class = VIPS_OPERATION_CLASS( class );
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VipsForeignClass *foreign_class = (VipsForeignClass *) class;
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VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
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gobject_class->dispose = vips_foreign_load_vips_dispose;
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object_class->nickname = "vipsload_base";
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object_class->description = _( "load vips base class" );
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/* You're unlikely to want to use this on untrusted files.
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*/
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operation_class->flags |= VIPS_OPERATION_UNTRUSTED;
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/* We are fast at is_a(), so high priority.
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*/
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foreign_class->priority = 200;
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load_class->get_flags = vips_foreign_load_vips_get_flags;
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load_class->get_flags_filename =
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vips_foreign_load_vips_get_flags_filename;
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load_class->header = vips_foreign_load_vips_header;
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load_class->load = NULL;
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}
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static void
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vips_foreign_load_vips_init( VipsForeignLoadVips *vips )
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{
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}
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typedef struct _VipsForeignLoadVipsFile {
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VipsForeignLoadVips parent_object;
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char *filename;
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} VipsForeignLoadVipsFile;
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typedef VipsForeignLoadVipsClass VipsForeignLoadVipsFileClass;
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G_DEFINE_TYPE( VipsForeignLoadVipsFile, vips_foreign_load_vips_file,
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vips_foreign_load_vips_get_type() );
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static int
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vips_foreign_load_vips_file_build( VipsObject *object )
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{
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VipsForeignLoadVips *vips = (VipsForeignLoadVips *) object;
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VipsForeignLoadVipsFile *file = (VipsForeignLoadVipsFile *) object;
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if( file->filename &&
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!(vips->source = vips_source_new_from_file( file->filename )) )
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return( -1 );
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if( VIPS_OBJECT_CLASS( vips_foreign_load_vips_file_parent_class )->
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build( object ) )
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return( -1 );
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return( 0 );
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}
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const char *vips__suffs[] = { ".v", ".vips", NULL };
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static gboolean
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vips_foreign_load_vips_file_is_a( const char *filename )
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{
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return( vips__file_magic( filename ) );
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}
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static void
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vips_foreign_load_vips_file_class_init( VipsForeignLoadVipsClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsForeignClass *foreign_class = (VipsForeignClass *) class;
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VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "vipsload";
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object_class->description = _( "load vips from file" );
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object_class->build = vips_foreign_load_vips_file_build;
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foreign_class->suffs = vips__suffs;
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load_class->is_a = vips_foreign_load_vips_file_is_a;
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VIPS_ARG_STRING( class, "filename", 1,
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_( "Filename" ),
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_( "Filename to load from" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadVipsFile, filename ),
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NULL );
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}
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static void
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vips_foreign_load_vips_file_init( VipsForeignLoadVipsFile *file )
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{
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}
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typedef struct _VipsForeignLoadVipsSource {
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VipsForeignLoadVips parent_object;
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VipsSource *source;
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} VipsForeignLoadVipsSource;
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typedef VipsForeignLoadVipsClass VipsForeignLoadVipsSourceClass;
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G_DEFINE_TYPE( VipsForeignLoadVipsSource, vips_foreign_load_vips_source,
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vips_foreign_load_vips_get_type() );
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static int
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vips_foreign_load_vips_source_build( VipsObject *object )
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{
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VipsForeignLoadVips *vips = (VipsForeignLoadVips *) object;
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VipsForeignLoadVipsSource *source =
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(VipsForeignLoadVipsSource *) object;
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if( source->source ) {
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vips->source = source->source;
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g_object_ref( vips->source );
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}
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if( VIPS_OBJECT_CLASS( vips_foreign_load_vips_source_parent_class )->
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build( object ) )
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return( -1 );
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return( 0 );
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}
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static gboolean
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vips_foreign_load_vips_source_is_a_source( VipsSource *source )
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{
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VipsConnection *connection = VIPS_CONNECTION( source );
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const char *filename;
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return( vips_source_is_file( source ) &&
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(filename = vips_connection_filename( connection )) &&
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vips__file_magic( filename ) );
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}
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static void
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vips_foreign_load_vips_source_class_init( VipsForeignLoadVipsClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsOperationClass *operation_class = VIPS_OPERATION_CLASS( class );
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VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "vipsload_source";
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object_class->description = _( "load vips from source" );
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object_class->build = vips_foreign_load_vips_source_build;
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operation_class->flags |= VIPS_OPERATION_NOCACHE;
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load_class->is_a_source =
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vips_foreign_load_vips_source_is_a_source;
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VIPS_ARG_OBJECT( class, "source", 1,
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_( "Source" ),
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_( "Source to load from" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadVipsSource, source ),
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VIPS_TYPE_SOURCE );
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}
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static void
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vips_foreign_load_vips_source_init( VipsForeignLoadVipsSource *source )
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{
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}
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/**
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* vips_vipsload:
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* @filename: file to load
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* @out: (out): decompressed image
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* @...: %NULL-terminated list of optional named arguments
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*
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* Read in a vips image.
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*
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* See also: vips_vipssave().
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*
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* Returns: 0 on success, -1 on error.
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*/
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int
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vips_vipsload( const char *filename, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_call_split( "vipsload", ap, filename, out );
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va_end( ap );
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return( result );
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}
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/**
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* vips_vipsload_source:
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* @source: source to load from
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* @out: (out): decompressed image
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* @...: %NULL-terminated list of optional named arguments
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*
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* Exactly as vips_vipsload(), but read from a source.
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*
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* Returns: 0 on success, -1 on error.
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*/
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int
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vips_vipsload_source( VipsSource *source, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_call_split( "vipsload_source", ap, source, out );
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va_end( ap );
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return( result );
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}
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