331 lines
8.7 KiB
C
331 lines
8.7 KiB
C
/* load with libMagick
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*
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* 5/12/11
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* - from openslideload.c
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* 17/1/12
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* - remove header-only loads
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* 11/6/13
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* - add @all_frames option, off by default
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* 14/2/16
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* - add @page option, 0 by default
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* 25/11/16
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* - add @n, deprecate @all_frames (just sets n = -1)
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* 8/9/17
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* - don't cache magickload
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* 21/4/21 kleisauke
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* - include GObject part from magickload.c
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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 <string.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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#ifdef ENABLE_MAGICKLOAD
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#ifdef HAVE_MAGICK6
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#include "pforeign.h"
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#include "magick.h"
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typedef struct _VipsForeignLoadMagick {
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VipsForeignLoad parent_object;
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/* Deprecated. Just sets n = -1.
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*/
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gboolean all_frames;
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char *density; /* Load at this resolution */
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int page; /* Load this page (frame) */
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int n; /* Load this many pages */
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} VipsForeignLoadMagick;
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typedef VipsForeignLoadClass VipsForeignLoadMagickClass;
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G_DEFINE_ABSTRACT_TYPE( VipsForeignLoadMagick, vips_foreign_load_magick,
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VIPS_TYPE_FOREIGN_LOAD );
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static VipsForeignFlags
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vips_foreign_load_magick_get_flags_filename( const char *filename )
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{
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return( VIPS_FOREIGN_PARTIAL );
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}
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static VipsForeignFlags
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vips_foreign_load_magick_get_flags( VipsForeignLoad *load )
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{
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return( VIPS_FOREIGN_PARTIAL );
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}
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static void
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vips_foreign_load_magick_class_init( VipsForeignLoadMagickClass *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->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 = "magickload_base";
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object_class->description = _( "load with ImageMagick" );
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/* Don't cache magickload: it can gobble up memory and disc.
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*/
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operation_class->flags |= VIPS_OPERATION_NOCACHE;
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/* *magick is fuzzed, but it's such a huge thing it's safer to
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* disable it.
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*/
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operation_class->flags |= VIPS_OPERATION_UNTRUSTED;
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/* We need to be well to the back of the queue since vips's
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* dedicated loaders are usually preferable.
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*/
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foreign_class->priority = -100;
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load_class->get_flags_filename =
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vips_foreign_load_magick_get_flags_filename;
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load_class->get_flags = vips_foreign_load_magick_get_flags;
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VIPS_ARG_STRING( class, "density", 21,
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_( "Density" ),
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_( "Canvas resolution for rendering vector formats like SVG" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadMagick, density ),
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NULL );
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VIPS_ARG_INT( class, "page", 22,
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_( "Page" ),
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_( "First page to load" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadMagick, page ),
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0, 100000, 0 );
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VIPS_ARG_INT( class, "n", 23,
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_( "n" ),
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_( "Number of pages to load, -1 for all" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsForeignLoadMagick, n ),
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-1, 100000, 1 );
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VIPS_ARG_BOOL( class, "all_frames", 20,
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_( "All frames" ),
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_( "Read all frames from an image" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT | VIPS_ARGUMENT_DEPRECATED,
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G_STRUCT_OFFSET( VipsForeignLoadMagick, all_frames ),
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FALSE );
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}
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static void
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vips_foreign_load_magick_init( VipsForeignLoadMagick *magick )
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{
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magick->n = 1;
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}
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typedef struct _VipsForeignLoadMagickFile {
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VipsForeignLoadMagick parent_object;
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char *filename;
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} VipsForeignLoadMagickFile;
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typedef VipsForeignLoadMagickClass VipsForeignLoadMagickFileClass;
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G_DEFINE_TYPE( VipsForeignLoadMagickFile, vips_foreign_load_magick_file,
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vips_foreign_load_magick_get_type() );
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static gboolean
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ismagick( const char *filename )
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{
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/* Fetch up to the first 100 bytes. Hopefully that'll be enough.
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*/
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unsigned char buf[100];
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int len;
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return( (len = vips__get_bytes( filename, buf, 100 )) > 10 &&
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magick_ismagick( buf, len ) );
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}
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/* Unfortunately, libMagick does not support header-only reads very well. See
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*
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* http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=20017
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*
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* Test especially with BMP, GIF, TGA. So we are forced to read the entire
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* image in the @header() method.
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*/
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static int
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vips_foreign_load_magick_file_header( VipsForeignLoad *load )
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{
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VipsForeignLoadMagick *magick = (VipsForeignLoadMagick *) load;
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VipsForeignLoadMagickFile *magick_file =
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(VipsForeignLoadMagickFile *) load;
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if( magick->all_frames )
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magick->n = -1;
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if( vips__magick_read( magick_file->filename,
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load->out, magick->density,
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magick->page, magick->n ) )
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return( -1 );
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VIPS_SETSTR( load->out->filename, magick_file->filename );
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return( 0 );
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}
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static void
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vips_foreign_load_magick_file_class_init(
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VipsForeignLoadMagickFileClass *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 = "magickload";
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object_class->description = _( "load file with ImageMagick" );
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load_class->is_a = ismagick;
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load_class->header = vips_foreign_load_magick_file_header;
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load_class->load = NULL;
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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( VipsForeignLoadMagickFile, filename ),
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NULL );
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}
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static void
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vips_foreign_load_magick_file_init( VipsForeignLoadMagickFile *magick_file )
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{
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}
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typedef struct _VipsForeignLoadMagickBuffer {
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VipsForeignLoadMagick parent_object;
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VipsArea *buf;
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} VipsForeignLoadMagickBuffer;
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typedef VipsForeignLoadMagickClass VipsForeignLoadMagickBufferClass;
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G_DEFINE_TYPE( VipsForeignLoadMagickBuffer, vips_foreign_load_magick_buffer,
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vips_foreign_load_magick_get_type() );
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static gboolean
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vips_foreign_load_magick_buffer_is_a_buffer( const void *buf, size_t len )
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{
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return( len > 10 && magick_ismagick( (const unsigned char *) buf, len ) );
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}
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/* Unfortunately, libMagick does not support header-only reads very well. See
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*
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* http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=20017
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*
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* Test especially with BMP, GIF, TGA. So we are forced to read the entire
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* image in the @header() method.
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*/
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static int
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vips_foreign_load_magick_buffer_header( VipsForeignLoad *load )
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{
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VipsForeignLoadMagick *magick = (VipsForeignLoadMagick *) load;
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VipsForeignLoadMagickBuffer *magick_buffer =
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(VipsForeignLoadMagickBuffer *) load;
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if( magick->all_frames )
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magick->n = -1;
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if( vips__magick_read_buffer(
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magick_buffer->buf->data, magick_buffer->buf->length,
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load->out, magick->density, magick->page,
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magick->n ) )
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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_magick_buffer_class_init(
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VipsForeignLoadMagickBufferClass *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 = "magickload_buffer";
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object_class->description = _( "load buffer with ImageMagick" );
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load_class->is_a_buffer = vips_foreign_load_magick_buffer_is_a_buffer;
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load_class->header = vips_foreign_load_magick_buffer_header;
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load_class->load = NULL;
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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( VipsForeignLoadMagickBuffer, buf ),
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VIPS_TYPE_BLOB );
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}
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static void
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vips_foreign_load_magick_buffer_init( VipsForeignLoadMagickBuffer *buffer )
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{
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}
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#endif /*HAVE_MAGICK6*/
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#endif /*ENABLE_MAGICKLOAD*/
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