588 lines
15 KiB
C
588 lines
15 KiB
C
/* load jpeg from a file
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*
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* 24/11/11
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* - wrap a class around the jpeg writer
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* 29/11/11
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* - split to make load, load from buffer and load from file
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* 24/7/21
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* - add fail-on support
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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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#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 <setjmp.h>
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#include <vips/vips.h>
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#include <vips/buf.h>
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#include <vips/internal.h>
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#include "pforeign.h"
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#ifdef HAVE_JPEG
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#ifdef HAVE_EXIF
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#ifdef UNTAGGED_EXIF
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#include <exif-data.h>
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#include <exif-loader.h>
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#include <exif-ifd.h>
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#include <exif-utils.h>
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#else /*!UNTAGGED_EXIF*/
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#include <libexif/exif-data.h>
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#include <libexif/exif-loader.h>
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#include <libexif/exif-ifd.h>
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#include <libexif/exif-utils.h>
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#endif /*UNTAGGED_EXIF*/
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#endif /*HAVE_EXIF*/
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typedef struct _VipsForeignLoadJpeg {
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VipsForeignLoad parent_object;
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/* Set by subclasses.
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*/
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VipsSource *source;
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/* Shrink by this much during load.
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*/
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int shrink;
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/* Autorotate using exif orientation tag.
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*/
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gboolean autorotate;
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} VipsForeignLoadJpeg;
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typedef VipsForeignLoadClass VipsForeignLoadJpegClass;
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G_DEFINE_ABSTRACT_TYPE( VipsForeignLoadJpeg, vips_foreign_load_jpeg,
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VIPS_TYPE_FOREIGN_LOAD );
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static void
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vips_foreign_load_jpeg_dispose( GObject *gobject )
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{
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VipsForeignLoadJpeg *jpeg = (VipsForeignLoadJpeg *) gobject;
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VIPS_UNREF( jpeg->source );
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G_OBJECT_CLASS( vips_foreign_load_jpeg_parent_class )->
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dispose( gobject );
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}
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static int
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vips_foreign_load_jpeg_build( VipsObject *object )
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{
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VipsForeignLoadJpeg *jpeg = (VipsForeignLoadJpeg *) object;
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if( jpeg->shrink != 1 &&
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jpeg->shrink != 2 &&
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jpeg->shrink != 4 &&
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jpeg->shrink != 8 ) {
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vips_error( "VipsFormatLoadJpeg",
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_( "bad shrink factor %d" ), jpeg->shrink );
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return( -1 );
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}
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if( VIPS_OBJECT_CLASS( vips_foreign_load_jpeg_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 VipsForeignFlags
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vips_foreign_load_jpeg_get_flags( VipsForeignLoad *load )
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{
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return( VIPS_FOREIGN_SEQUENTIAL );
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}
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static VipsForeignFlags
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vips_foreign_load_jpeg_get_flags_filename( const char *filename )
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{
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return( VIPS_FOREIGN_SEQUENTIAL );
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}
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static int
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vips_foreign_load_jpeg_header( VipsForeignLoad *load )
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{
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VipsForeignLoadJpeg *jpeg = (VipsForeignLoadJpeg *) load;
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if( vips__jpeg_read_source( jpeg->source,
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load->out, TRUE, jpeg->shrink, load->fail_on,
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jpeg->autorotate ) )
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return( -1 );
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return( 0 );
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}
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static int
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vips_foreign_load_jpeg_load( VipsForeignLoad *load )
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{
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VipsForeignLoadJpeg *jpeg = (VipsForeignLoadJpeg *) load;
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if( vips__jpeg_read_source( jpeg->source,
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load->real, FALSE, jpeg->shrink, load->fail_on,
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jpeg->autorotate ) )
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return( -1 );
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return( 0 );
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}
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static void
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vips_foreign_load_jpeg_class_init( VipsForeignLoadJpegClass *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->dispose = vips_foreign_load_jpeg_dispose;
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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 = "jpegload_base";
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object_class->description = _( "load jpeg" );
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object_class->build = vips_foreign_load_jpeg_build;
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/* We are fast at is_a(), so high priority.
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*/
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foreign_class->priority = 50;
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load_class->get_flags_filename =
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vips_foreign_load_jpeg_get_flags_filename;
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load_class->get_flags = vips_foreign_load_jpeg_get_flags;
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load_class->header = vips_foreign_load_jpeg_header;
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load_class->load = vips_foreign_load_jpeg_load;
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VIPS_ARG_INT( class, "shrink", 20,
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_( "Shrink" ),
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_( "Shrink factor on load" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadJpeg, shrink ),
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1, 16, 1 );
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VIPS_ARG_BOOL( class, "autorotate", 21,
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_( "Autorotate" ),
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_( "Rotate image using exif orientation" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadJpeg, autorotate ),
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FALSE );
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}
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static void
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vips_foreign_load_jpeg_init( VipsForeignLoadJpeg *jpeg )
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{
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jpeg->shrink = 1;
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}
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typedef struct _VipsForeignLoadJpegSource {
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VipsForeignLoadJpeg parent_object;
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VipsSource *source;
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} VipsForeignLoadJpegSource;
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typedef VipsForeignLoadJpegClass VipsForeignLoadJpegSourceClass;
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G_DEFINE_TYPE( VipsForeignLoadJpegSource, vips_foreign_load_jpeg_source,
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vips_foreign_load_jpeg_get_type() );
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static int
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vips_foreign_load_jpeg_source_build( VipsObject *object )
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{
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VipsForeignLoadJpeg *jpeg = (VipsForeignLoadJpeg *) object;
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VipsForeignLoadJpegSource *source =
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(VipsForeignLoadJpegSource *) object;
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if( source->source ) {
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jpeg->source = source->source;
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g_object_ref( jpeg->source );
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}
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if( VIPS_OBJECT_CLASS( vips_foreign_load_jpeg_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_jpeg_source_is_a_source( VipsSource *source )
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{
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return( vips__isjpeg_source( source ) );
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}
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static void
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vips_foreign_load_jpeg_source_class_init(
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VipsForeignLoadJpegSourceClass *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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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 = "jpegload_source";
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object_class->description = _( "load image from jpeg source" );
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object_class->build = vips_foreign_load_jpeg_source_build;
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load_class->is_a_source = vips_foreign_load_jpeg_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( VipsForeignLoadJpegSource, 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_jpeg_source_init( VipsForeignLoadJpegSource *source )
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{
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}
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typedef struct _VipsForeignLoadJpegFile {
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VipsForeignLoadJpeg parent_object;
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char *filename;
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} VipsForeignLoadJpegFile;
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typedef VipsForeignLoadJpegClass VipsForeignLoadJpegFileClass;
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G_DEFINE_TYPE( VipsForeignLoadJpegFile, vips_foreign_load_jpeg_file,
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vips_foreign_load_jpeg_get_type() );
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static int
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vips_foreign_load_jpeg_file_build( VipsObject *object )
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{
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VipsForeignLoadJpeg *jpeg = (VipsForeignLoadJpeg *) object;
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VipsForeignLoadJpegFile *file = (VipsForeignLoadJpegFile *) object;
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if( file->filename &&
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!(jpeg->source =
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vips_source_new_from_file( file->filename )) )
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return( -1 );
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if( VIPS_OBJECT_CLASS( vips_foreign_load_jpeg_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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static gboolean
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vips_foreign_load_jpeg_file_is_a( const char *filename )
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{
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VipsSource *source;
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gboolean result;
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if( !(source = vips_source_new_from_file( filename )) )
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return( FALSE );
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result = vips_foreign_load_jpeg_source_is_a_source( source );
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VIPS_UNREF( source );
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return( result );
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}
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static void
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vips_foreign_load_jpeg_file_class_init( VipsForeignLoadJpegFileClass *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 = "jpegload";
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object_class->description = _( "load jpeg from file" );
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object_class->build = vips_foreign_load_jpeg_file_build;
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foreign_class->suffs = vips__jpeg_suffs;
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load_class->is_a = vips_foreign_load_jpeg_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( VipsForeignLoadJpegFile, filename ),
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NULL );
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}
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static void
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vips_foreign_load_jpeg_file_init( VipsForeignLoadJpegFile *file )
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{
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}
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typedef struct _VipsForeignLoadJpegBuffer {
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VipsForeignLoadJpeg parent_object;
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VipsBlob *blob;
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} VipsForeignLoadJpegBuffer;
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typedef VipsForeignLoadJpegClass VipsForeignLoadJpegBufferClass;
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G_DEFINE_TYPE( VipsForeignLoadJpegBuffer, vips_foreign_load_jpeg_buffer,
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vips_foreign_load_jpeg_get_type() );
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static int
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vips_foreign_load_jpeg_buffer_build( VipsObject *object )
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{
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VipsForeignLoadJpeg *jpeg = (VipsForeignLoadJpeg *) object;
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VipsForeignLoadJpegBuffer *buffer =
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(VipsForeignLoadJpegBuffer *) object;
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if( buffer->blob &&
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!(jpeg->source = vips_source_new_from_memory(
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VIPS_AREA( buffer->blob )->data,
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VIPS_AREA( buffer->blob )->length )) )
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return( -1 );
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if( VIPS_OBJECT_CLASS( vips_foreign_load_jpeg_buffer_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_jpeg_buffer_is_a_buffer( const void *buf, size_t len )
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{
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VipsSource *source;
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gboolean result;
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if( !(source = vips_source_new_from_memory( buf, len )) )
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return( FALSE );
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result = vips_foreign_load_jpeg_source_is_a_source( source );
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VIPS_UNREF( source );
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return( result );
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}
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static void
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vips_foreign_load_jpeg_buffer_class_init(
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VipsForeignLoadJpegBufferClass *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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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 = "jpegload_buffer";
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object_class->description = _( "load jpeg from buffer" );
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object_class->build = vips_foreign_load_jpeg_buffer_build;
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load_class->is_a_buffer = vips_foreign_load_jpeg_buffer_is_a_buffer;
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VIPS_ARG_BOXED( class, "buffer", 1,
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_( "Buffer" ),
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_( "Buffer to load from" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadJpegBuffer, blob ),
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VIPS_TYPE_BLOB );
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}
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static void
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vips_foreign_load_jpeg_buffer_init( VipsForeignLoadJpegBuffer *buffer )
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{
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}
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#endif /*HAVE_JPEG*/
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/**
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* vips_jpegload:
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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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* Optional arguments:
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*
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* * @shrink: %gint, shrink by this much on load
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* * @fail_on: #VipsFailOn, types of read error to fail on
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* * @autorotate: %gboolean, rotate image upright during load
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*
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* Read a JPEG file into a VIPS image. It can read most 8-bit JPEG images,
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* including CMYK and YCbCr.
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*
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* @shrink means shrink by this integer factor during load. Possible values
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* are 1, 2, 4 and 8. Shrinking during read is very much faster than
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* decompressing the whole image and then shrinking later.
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*
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* Use @fail_on to set the type of error that will cause load to fail. By
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* default, loaders are permissive, that is, #VIPS_FAIL_ON_NONE.
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*
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* Setting @autorotate to %TRUE will make the loader interpret the
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* orientation tag and automatically rotate the image appropriately during
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* load.
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*
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* If @autorotate is %FALSE, the metadata field #VIPS_META_ORIENTATION is set
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* to the value of the orientation tag. Applications may read and interpret
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* this field
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* as they wish later in processing. See vips_autorot(). Save
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* operations will use #VIPS_META_ORIENTATION, if present, to set the
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* orientation of output images.
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*
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* Example:
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*
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* |[
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* vips_jpegload( "fred.jpg", &out,
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* "shrink", 8,
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* "fail-on", VIPS_FAIL_ON_TRUNCATED,
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* NULL );
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* ]|
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*
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* Any embedded ICC profiles are ignored: you always just get the RGB from
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* the file. Instead, the embedded profile will be attached to the image as
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* #VIPS_META_ICC_NAME. You need to use something like
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* vips_icc_import() to get CIE values from the file.
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*
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* EXIF metadata is attached as #VIPS_META_EXIF_NAME, IPTC as
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* #VIPS_META_IPTC_NAME, and XMP as #VIPS_META_XMP_NAME.
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*
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* The int metadata item "jpeg-multiscan" is set to the result of
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* jpeg_has_multiple_scans(). Interlaced jpeg images need a large amount of
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* memory to load, so this field gives callers a chance to handle these
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* images differently.
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*
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* The string-valued field "jpeg-chroma-subsample" gives the chroma subsample
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* in standard notation. 4:4:4 means no subsample, 4:2:0 means YCbCr with
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* Cb and Cr subsampled horizontally and vertically, 4:4:4:4 means a CMYK
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* image with no subsampling.
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*
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* The EXIF thumbnail, if present, is attached to the image as
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* "jpeg-thumbnail-data". See vips_image_get_blob().
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*
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* See also: vips_jpegload_buffer(), vips_image_new_from_file(), vips_autorot().
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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_jpegload( 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( "jpegload", 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_jpegload_buffer:
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* @buf: (array length=len) (element-type guint8): memory area to load
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* @len: (type gsize): size of memory area
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* @out: (out): image to write
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* @...: %NULL-terminated list of optional named arguments
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*
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* Optional arguments:
|
|
*
|
|
* * @shrink: %gint, shrink by this much on load
|
|
* * @fail_on: #VipsFailOn, types of read error to fail on
|
|
* * @autorotate: %gboolean, use exif Orientation tag to rotate the image
|
|
* during load
|
|
*
|
|
* Read a JPEG-formatted memory block into a VIPS image. Exactly as
|
|
* vips_jpegload(), but read from a memory buffer.
|
|
*
|
|
* You must not free the buffer while @out is active. The
|
|
* #VipsObject::postclose signal on @out is a good place to free.
|
|
*
|
|
* See also: vips_jpegload().
|
|
*
|
|
* Returns: 0 on success, -1 on error.
|
|
*/
|
|
int
|
|
vips_jpegload_buffer( void *buf, size_t len, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
VipsBlob *blob;
|
|
int result;
|
|
|
|
/* We don't take a copy of the data or free it.
|
|
*/
|
|
blob = vips_blob_new( NULL, buf, len );
|
|
|
|
va_start( ap, out );
|
|
result = vips_call_split( "jpegload_buffer", ap, blob, out );
|
|
va_end( ap );
|
|
|
|
vips_area_unref( VIPS_AREA( blob ) );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_jpegload_source:
|
|
* @source: source to load
|
|
* @out: (out): image to write
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Optional arguments:
|
|
*
|
|
* * @shrink: %gint, shrink by this much on load
|
|
* * @fail_on: #VipsFailOn, types of read error to fail on
|
|
* * @autorotate: %gboolean, use exif Orientation tag to rotate the image
|
|
* during load
|
|
*
|
|
* Read a JPEG-formatted memory block into a VIPS image. Exactly as
|
|
* vips_jpegload(), but read from a source.
|
|
*
|
|
* See also: vips_jpegload().
|
|
*
|
|
* Returns: 0 on success, -1 on error.
|
|
*/
|
|
int
|
|
vips_jpegload_source( VipsSource *source, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_call_split( "jpegload_source", ap, source, out );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|