exiv2-utils.cpp 25.1 KB
Newer Older
Paolo Bacchilega's avatar
Paolo Bacchilega committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
/* -*- Mode: CPP; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/*
 *  GThumb
 *
 *  Copyright (C) 2008-2009 Free Software Foundation, Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 */

#include <config.h>
24
#include <glib.h>
25
#define GDK_PIXBUF_ENABLE_BACKEND
26
#include <gdk-pixbuf/gdk-pixbuf.h>
Paolo Bacchilega's avatar
Paolo Bacchilega committed
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
#include <exiv2/basicio.hpp>
#include <exiv2/error.hpp>
#include <exiv2/image.hpp>
#include <exiv2/exif.hpp>
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <exiv2/xmp.hpp>
#include <gthumb.h>
#include "exiv2-utils.h"

using namespace std;


/* Some bits of information may be contained in more than one metadata tag.
   The arrays below define the valid tags for a particular piece of
   information, in decreasing order of preference (best one first) */

const char *_DATE_TAG_NAMES[] = {
	"Exif::Image::DateTime",
	"Xmp::exif::DateTime",
	"Exif::Photo::DateTimeOriginal",
	"Xmp::exif::DateTimeOriginal",
	"Exif::Photo::DateTimeDigitized",
	"Xmp::exif::DateTimeDigitized",
	"Xmp::xmp::CreateDate",
	"Xmp::photoshop::DateCreated",
	"Xmp::xmp::ModifyDate",
	"Xmp::xmp::MetadataDate",
	NULL
};

60 61 62 63 64 65 66 67
const char *_LAST_DATE_TAG_NAMES[] = {
	"Exif::Image::DateTime",
	"Xmp::exif::DateTime",
	"Xmp::xmp::ModifyDate",
	"Xmp::xmp::MetadataDate",
	NULL
};

68 69 70 71 72 73 74 75 76 77
const char *_ORIGINAL_DATE_TAG_NAMES[] = {
	"Exif::Photo::DateTimeOriginal",
	"Xmp::exif::DateTimeOriginal",
	"Exif::Photo::DateTimeDigitized",
	"Xmp::exif::DateTimeDigitized",
	"Xmp::xmp::CreateDate",
	"Xmp::photoshop::DateCreated",
	NULL
};

Paolo Bacchilega's avatar
Paolo Bacchilega committed
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
const char *_EXPOSURE_TIME_TAG_NAMES[] = {
	"Exif::Photo::ExposureTime",
	"Xmp::exif::ExposureTime",
	"Exif::Photo::ShutterSpeedValue",
	"Xmp::exif::ShutterSpeedValue",
	NULL
};

const char *_EXPOSURE_MODE_TAG_NAMES[] = {
	"Exif::Photo::ExposureMode",
	"Xmp::exif::ExposureMode",
	NULL
};

const char *_ISOSPEED_TAG_NAMES[] = {
	"Exif::Photo::ISOSpeedRatings",
	"Xmp::exif::ISOSpeedRatings",
	NULL
};

const char *_APERTURE_TAG_NAMES[] = {
	"Exif::Photo::ApertureValue",
	"Xmp::exif::ApertureValue",
	"Exif::Photo::FNumber",
	"Xmp::exif::FNumber",
	NULL
};

const char *_FOCAL_LENGTH_TAG_NAMES[] = {
	"Exif::Photo::FocalLength",
	"Xmp::exif::FocalLength",
	NULL
};

const char *_SHUTTER_SPEED_TAG_NAMES[] = {
	"Exif::Photo::ShutterSpeedValue",
	"Xmp::exif::ShutterSpeedValue",
	NULL
};

const char *_MAKE_TAG_NAMES[] = {
	"Exif::Image::Make",
	"Xmp::tiff::Make",
	NULL
};

const char *_MODEL_TAG_NAMES[] = {
	"Exif::Image::Model",
	"Xmp::tiff::Model",
	NULL
};

const char *_FLASH_TAG_NAMES[] = {
	"Exif::Photo::Flash",
	"Xmp::exif::Flash",
	NULL
};

const char *_ORIENTATION_TAG_NAMES[] = {
	"Exif::Image::Orientation",
	"Xmp::tiff::Orientation",
	NULL
};

142
const char *_DESCRIPTION_TAG_NAMES[] = {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
143 144 145
	"Exif::Photo::UserComment",
	"Exif::Image::ImageDescription",
	"Xmp::dc::description",
146
	"Xmp::tiff::ImageDescription",
Paolo Bacchilega's avatar
Paolo Bacchilega committed
147 148 149 150 151
	"Iptc::Application2::Caption",
	"Iptc::Application2::Headline",
	NULL
};

152 153 154 155 156
const char *_TITLE_TAG_NAMES[] = {
	"Xmp::dc::title",
	NULL
};

Paolo Bacchilega's avatar
Paolo Bacchilega committed
157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
const char *_LOCATION_TAG_NAMES[] = {
	"Xmp::iptc::Location",
	"Iptc::Application2::LocationName",
	NULL
};

const char *_KEYWORDS_TAG_NAMES[] = {
	"Xmp::dc::subject",
	"Xmp::iptc::Keywords",
	"Iptc::Application2::Keywords",
	NULL
};


inline static char *
exiv2_key_from_attribute (const char *attribute)
{
	return _g_replace (attribute, "::", ".");
}


inline static char *
exiv2_key_to_attribute (const char *key)
{
	return _g_replace (key, ".", "::");
}


185 186 187 188 189 190 191 192 193 194 195 196 197 198
static gboolean
attribute_is_date (const char *key)
{
	int i;

	for (i = 0; _DATE_TAG_NAMES[i] != NULL; i++) {
		if (strcmp (_DATE_TAG_NAMES[i], key) == 0)
			return TRUE;
	}

	return FALSE;
}


199
static void
Paolo Bacchilega's avatar
Paolo Bacchilega committed
200 201 202 203 204
set_file_info (GFileInfo  *info,
	       const char *key,
	       const char *description,
	       const char *formatted_value,
	       const char *raw_value,
205 206
	       const char *category,
	       const char *type_name)
Paolo Bacchilega's avatar
Paolo Bacchilega committed
207 208 209 210 211 212 213
{
	char            *attribute;
	GthMetadataInfo *metadata_info;
	GthMetadata     *metadata;
	char            *description_utf8;
	char            *formatted_value_utf8;

Paolo Bacchilega's avatar
Paolo Bacchilega committed
214 215
	if (_g_utf8_all_spaces (formatted_value))
		return;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
216 217 218

	attribute = exiv2_key_to_attribute (key);
	description_utf8 = g_locale_to_utf8 (description, -1, NULL, NULL, NULL);
219 220 221 222 223 224 225 226
	if (attribute_is_date (attribute)) {
		GTimeVal time_;

		if (_g_time_val_from_exif_date (raw_value, &time_))
			formatted_value_utf8 = _g_time_val_strftime (&time_, "%x %X");
		else
			formatted_value_utf8 = g_locale_to_utf8 (formatted_value, -1, NULL, NULL, NULL);
	}
227 228 229 230 231 232 233 234 235
	else {
		const char *formatted_clean;

		if (strncmp (formatted_value, "lang=", 5) == 0)
			formatted_clean = strchr (formatted_value, ' ') + 1;
		else
			formatted_clean = formatted_value;
		formatted_value_utf8 = g_locale_to_utf8 (formatted_clean, -1, NULL, NULL, NULL);
	}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
236 237 238 239 240 241

	metadata_info = gth_main_get_metadata_info (attribute);
	if ((metadata_info == NULL) && (category != NULL)) {
		GthMetadataInfo info;

		info.id = attribute;
242
		info.type = (type_name != NULL) ? g_strdup (type_name) : NULL;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
243 244 245 246 247 248 249
		info.display_name = description_utf8;
		info.category = category;
		info.sort_order = 500;
		info.flags = GTH_METADATA_ALLOW_IN_PROPERTIES_VIEW;
		metadata_info = gth_main_register_metadata_info (&info);
	}

Paolo Bacchilega's avatar
Paolo Bacchilega committed
250 251 252
	if ((metadata_info != NULL) && (metadata_info->type == NULL) && (type_name != NULL))
		metadata_info->type = g_strdup (type_name);

253
	if ((metadata_info != NULL) && (metadata_info->display_name == NULL) && (description_utf8 != NULL))
Paolo Bacchilega's avatar
Paolo Bacchilega committed
254 255 256
		metadata_info->display_name = g_strdup (description_utf8);

	metadata = gth_metadata_new ();
Paolo Bacchilega's avatar
Paolo Bacchilega committed
257 258 259 260 261 262 263
	g_object_set (metadata,
		      "id", key,
		      "description", description_utf8,
		      "formatted", formatted_value_utf8,
		      "raw", raw_value,
		      "value-type", type_name,
		      NULL);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283
	g_file_info_set_attribute_object (info, attribute, G_OBJECT (metadata));

	g_object_unref (metadata);
	g_free (formatted_value_utf8);
	g_free (description_utf8);
	g_free (attribute);
}


static void
set_attribute_from_tagset (GFileInfo  *info,
			   const char *attribute,
			   const char *tagset[])
{
	GObject *metadata;
	int      i;
	char    *key;
	char    *description;
	char    *formatted_value;
	char    *raw_value;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
284
	char    *type_name;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300

	metadata = NULL;
	for (i = 0; tagset[i] != NULL; i++) {
		metadata = g_file_info_get_attribute_object (info, tagset[i]);
		if (metadata != NULL)
			break;
	}

	if (metadata == NULL)
		return;

	g_object_get (metadata,
		      "id", &key,
		      "description", &description,
		      "formatted", &formatted_value,
		      "raw", &raw_value,
Paolo Bacchilega's avatar
Paolo Bacchilega committed
301
		      "value-type", &type_name,
Paolo Bacchilega's avatar
Paolo Bacchilega committed
302
		      NULL);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
303 304 305 306 307 308 309
	set_file_info (info,
		       attribute,
		       description,
		       formatted_value,
		       raw_value,
		       NULL,
		       type_name);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
310 311 312 313
}


static void
314 315 316
set_string_list_attribute_from_tagset (GFileInfo  *info,
				       const char *attribute,
				       const char *tagset[])
Paolo Bacchilega's avatar
Paolo Bacchilega committed
317
{
318 319 320 321 322
	GObject        *metadata;
	int             i;
	char           *raw;
	char          **keywords;
	GthStringList  *string_list;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
323

324 325 326 327 328 329 330 331 332 333 334
	metadata = NULL;
	for (i = 0; tagset[i] != NULL; i++) {
		metadata = g_file_info_get_attribute_object (info, tagset[i]);
		if (metadata != NULL)
			break;
	}

	if (metadata == NULL)
		return;

	g_object_get (metadata, "raw", &raw, NULL);
335
	keywords = g_strsplit (raw, ", ", -1);
336 337 338 339 340 341 342
	string_list = gth_string_list_new_from_strv (keywords);
	g_file_info_set_attribute_object (info, attribute, G_OBJECT (string_list));

	g_strfreev (keywords);
	g_free (raw);
}

343

344 345 346
static void
set_attributes_from_tagsets (GFileInfo *info)
{
347 348 349 350
	set_attribute_from_tagset (info, "general::datetime", _LAST_DATE_TAG_NAMES);
	if (g_file_info_get_attribute_object (info, "general::datetime") == NULL)
		set_attribute_from_tagset (info, "general::datetime", _ORIGINAL_DATE_TAG_NAMES);

351
	set_attribute_from_tagset (info, "general::description", _DESCRIPTION_TAG_NAMES);
352
	set_attribute_from_tagset (info, "general::title", _TITLE_TAG_NAMES);
353 354
	set_attribute_from_tagset (info, "general::location", _LOCATION_TAG_NAMES);
	set_string_list_attribute_from_tagset (info, "general::tags", _KEYWORDS_TAG_NAMES);
355
	set_attribute_from_tagset (info, "Embedded::Photo::DateTimeOriginal", _ORIGINAL_DATE_TAG_NAMES);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380
	set_attribute_from_tagset (info, "Embedded::Image::Orientation", _ORIENTATION_TAG_NAMES);
}


static const char *
get_exif_default_category (const Exiv2::Exifdatum &md)
{
	if (Exiv2::ExifTags::isMakerIfd(md.ifdId()))
		return "Exif::MakerNotes";

	switch (md.ifdId()) {
	case Exiv2::ifd1Id:
		return "Exif::Thumbnail";
	case Exiv2::gpsIfdId:
		return "Exif::GPS";
	case Exiv2::iopIfdId:
		return "Exif::Versions";
	default:
		break;
	}

	return "Exif::Other";
}


381 382 383 384 385 386 387 388 389 390
static void
exiv2_read_metadata (Exiv2::Image::AutoPtr  image,
		     GFileInfo             *info)
{
	image->readMetadata();

	Exiv2::ExifData &exifData = image->exifData();
	if (! exifData.empty()) {
		Exiv2::ExifData::const_iterator end = exifData.end();
		for (Exiv2::ExifData::const_iterator md = exifData.begin(); md != end; ++md) {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
391 392
			stringstream raw_value;
			raw_value << md->value();
393

Paolo Bacchilega's avatar
Paolo Bacchilega committed
394 395 396 397
			stringstream description;
			if (! md->tagLabel().empty())
				description << md->tagLabel();
			else if (md->ifdId () > Exiv2::ifd1Id)
398
				// Must be a MakerNote - include group name
Paolo Bacchilega's avatar
Paolo Bacchilega committed
399 400
				description << md->groupName() << "." << md->tagName();
			else
401
				// Normal exif tag - just use tag name
Paolo Bacchilega's avatar
Paolo Bacchilega committed
402
				description << md->tagName();
403 404 405

			set_file_info (info,
				       md->key().c_str(),
Paolo Bacchilega's avatar
Paolo Bacchilega committed
406
				       description.str().c_str(),
407
				       md->print(&exifData).c_str(),
Paolo Bacchilega's avatar
Paolo Bacchilega committed
408
				       raw_value.str().c_str(),
409 410
				       get_exif_default_category (*md),
				       md->typeName());
411 412 413 414 415 416 417
		}
	}

	Exiv2::IptcData &iptcData = image->iptcData();
	if (! iptcData.empty()) {
		Exiv2::IptcData::iterator end = iptcData.end();
		for (Exiv2::IptcData::iterator md = iptcData.begin(); md != end; ++md) {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
418 419
			stringstream raw_value;
			raw_value << md->value();
420

Paolo Bacchilega's avatar
Paolo Bacchilega committed
421 422 423 424 425
			stringstream description;
			if (! md->tagLabel().empty())
				description << md->tagLabel();
			else
				description << md->tagName();
426 427 428

			set_file_info (info,
				       md->key().c_str(),
Paolo Bacchilega's avatar
Paolo Bacchilega committed
429 430 431
				       description.str().c_str(),
				       md->print().c_str(),
				       raw_value.str().c_str(),
432 433
				       "Iptc",
				       md->typeName());
434 435 436 437 438 439 440
		}
	}

	Exiv2::XmpData &xmpData = image->xmpData();
	if (! xmpData.empty()) {
		Exiv2::XmpData::iterator end = xmpData.end();
		for (Exiv2::XmpData::iterator md = xmpData.begin(); md != end; ++md) {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
441 442
			stringstream raw_value;
			raw_value << md->value();
443

Paolo Bacchilega's avatar
Paolo Bacchilega committed
444 445 446 447 448
			stringstream description;
			if (! md->tagLabel().empty())
				description << md->tagLabel();
			else
				description << md->groupName() << "." << md->tagName();
449 450 451

			set_file_info (info,
				       md->key().c_str(),
Paolo Bacchilega's avatar
Paolo Bacchilega committed
452 453 454
				       description.str().c_str(),
				       md->print().c_str(),
				       raw_value.str().c_str(),
455 456
				       "Xmp::Embedded",
				       md->typeName());
457 458 459 460 461 462 463
		}
	}

	set_attributes_from_tagsets (info);
}


Paolo Bacchilega's avatar
Paolo Bacchilega committed
464
/*
465
 * exiv2_read_metadata_from_file
Paolo Bacchilega's avatar
Paolo Bacchilega committed
466 467 468 469 470 471
 * reads metadata from image files
 * code relies heavily on example1 from the exiv2 website
 * http://www.exiv2.org/example1.html
 */
extern "C"
gboolean
472 473 474
exiv2_read_metadata_from_file (GFile      *file,
			       GFileInfo  *info,
			       GError    **error)
Paolo Bacchilega's avatar
Paolo Bacchilega committed
475 476 477 478 479
{
	try {
		char *path;

		path = g_file_get_path (file);
480 481 482 483 484 485
		if (path == NULL) {
			if (error != NULL)
				*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, _("Invalid file format"));
			return FALSE;
		}

Paolo Bacchilega's avatar
Paolo Bacchilega committed
486 487 488 489
		Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(path);
		g_free (path);

		if (image.get() == 0) {
490 491
			if (error != NULL)
				*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, _("Invalid file format"));
Paolo Bacchilega's avatar
Paolo Bacchilega committed
492 493 494
			return FALSE;
		}

495 496
		exiv2_read_metadata (image, info);
	}
497
	catch (Exiv2::AnyError& e) {
498
		if (error != NULL)
499
			*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, e.what());
500 501
		return FALSE;
	}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
502

503 504
	return TRUE;
}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
505 506


507 508 509 510 511 512 513 514 515
extern "C"
gboolean
exiv2_read_metadata_from_buffer (void       *buffer,
				 gsize       buffer_size,
				 GFileInfo  *info,
				 GError    **error)
{
	try {
		Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open ((Exiv2::byte*) buffer, buffer_size);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
516

517 518 519 520
		if (image.get() == 0) {
			if (error != NULL)
				*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, _("Invalid file format"));
			return FALSE;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
521 522
		}

523
		exiv2_read_metadata (image, info);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
524
	}
525
	catch (Exiv2::AnyError& e) {
526
		if (error != NULL)
527
			*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, e.what());
Paolo Bacchilega's avatar
Paolo Bacchilega committed
528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543
		return FALSE;
	}

	return TRUE;
}


extern "C"
gboolean
exiv2_read_sidecar (GFile     *file,
		    GFileInfo *info)
{
	try {
		char *path;

		path = g_file_get_path (file);
544 545 546
		if (path == NULL)
			return FALSE;

Paolo Bacchilega's avatar
Paolo Bacchilega committed
547 548 549 550 551 552 553 554 555 556 557 558 559
		Exiv2::DataBuf buf = Exiv2::readFile(path);
		g_free (path);

		std::string xmpPacket;
		xmpPacket.assign(reinterpret_cast<char*>(buf.pData_), buf.size_);
		Exiv2::XmpData xmpData;

		if (0 != Exiv2::XmpParser::decode(xmpData, xmpPacket))
			return FALSE;

		if (! xmpData.empty()) {
			Exiv2::XmpData::iterator end = xmpData.end();
			for (Exiv2::XmpData::iterator md = xmpData.begin(); md != end; ++md) {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
560 561
				stringstream raw_value;
				raw_value << md->value();
Paolo Bacchilega's avatar
Paolo Bacchilega committed
562

Paolo Bacchilega's avatar
Paolo Bacchilega committed
563 564 565 566 567
				stringstream description;
				if (! md->tagLabel().empty())
					description << md->tagLabel();
				else
					description << md->groupName() << "." << md->tagName();
Paolo Bacchilega's avatar
Paolo Bacchilega committed
568 569 570

				set_file_info (info,
					       md->key().c_str(),
Paolo Bacchilega's avatar
Paolo Bacchilega committed
571 572 573
					       description.str().c_str(),
					       md->print().c_str(),
					       raw_value.str().c_str(),
574 575
					       "Xmp::Sidecar",
					       md->typeName());
Paolo Bacchilega's avatar
Paolo Bacchilega committed
576 577 578 579 580 581 582
			}
		}
		Exiv2::XmpParser::terminate();

		set_attributes_from_tagsets (info);
	}
	catch (Exiv2::AnyError& e) {
583
		std::cerr << "Caught Exiv2 exception '" << e << "'\n";
Paolo Bacchilega's avatar
Paolo Bacchilega committed
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612
		return FALSE;
	}

	return TRUE;
}


static void
mandatory_int (Exiv2::ExifData &checkdata,
	       const char      *tag,
	       int              value)
{
	Exiv2::ExifKey key = Exiv2::ExifKey(tag);
	if (checkdata.findKey(key) == checkdata.end())
		checkdata[tag] = value;
}


static void
mandatory_string (Exiv2::ExifData &checkdata,
		  const char      *tag,
		  const char      *value)
{
	Exiv2::ExifKey key = Exiv2::ExifKey(tag);
	if (checkdata.findKey(key) == checkdata.end())
		checkdata[tag] = value;
}


Paolo Bacchilega's avatar
Paolo Bacchilega committed
613
const char *
614
gth_main_get_metadata_type (GthMetadata *metadata)
Paolo Bacchilega's avatar
Paolo Bacchilega committed
615 616 617 618 619 620 621 622 623 624 625
{
	const char      *value_type;
	GthMetadataInfo *metadatum_info;

	value_type = gth_metadata_get_value_type (metadata);
	if (g_strcmp0 (value_type, "Undefined") == 0)
			value_type = NULL;

	if (value_type != NULL)
		return value_type;

626
	metadatum_info = gth_main_get_metadata_info (gth_metadata_get_id (metadata));
Paolo Bacchilega's avatar
Paolo Bacchilega committed
627 628 629 630 631 632 633
	if (metadatum_info != NULL)
		value_type = metadatum_info->type;

	return value_type;
}


634 635 636 637
static Exiv2::DataBuf
exiv2_write_metadata_private (Exiv2::Image::AutoPtr  image,
			      GFileInfo             *info,
			      GdkPixbuf             *pixbuf)
Paolo Bacchilega's avatar
Paolo Bacchilega committed
638
{
639 640
	char **attributes;
	int    i;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
641

642
	image->clearMetadata();
Paolo Bacchilega's avatar
Paolo Bacchilega committed
643

644
	// EXIF Data
Paolo Bacchilega's avatar
Paolo Bacchilega committed
645

646
	Exiv2::ExifData ed;
647 648 649 650
	attributes = g_file_info_list_attributes (info, "Exif");
	for (i = 0; attributes[i] != NULL; i++) {
		GthMetadata *metadatum;
		char *key;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
651

652 653
		metadatum = (GthMetadata *) g_file_info_get_attribute_object (info, attributes[i]);
		key = exiv2_key_from_attribute (attributes[i]);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
654

655
		try {
656 657 658
			/* If the metadatum has no value yet, a new empty value
			 * is created. The type is taken from Exiv2's tag
			 * lookup tables. If the tag is not found in the table,
Paolo Bacchilega's avatar
Paolo Bacchilega committed
659 660
			 * the type defaults to ASCII.
			 * We always create the metadatum explicitly if the
661 662
			 * type is available to avoid type errors.
			 * See bug #610389 for more details.  The original
Paolo Bacchilega's avatar
Paolo Bacchilega committed
663
			 * explanation is here:
664 665 666
			 * http://uk.groups.yahoo.com/group/exiv2/message/1472
			 */

Paolo Bacchilega's avatar
Paolo Bacchilega committed
667
			const char *raw_value = gth_metadata_get_raw (metadatum);
668
			const char *value_type = gth_main_get_metadata_type (metadatum);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
669

670
			if ((raw_value != NULL) && (strcmp (raw_value, "") != 0) && (value_type != NULL)) {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
671 672
				Exiv2::Value::AutoPtr value = Exiv2::Value::create (Exiv2::TypeInfo::typeId (value_type));
				value->read (raw_value);
673 674 675
				Exiv2::ExifKey exif_key(key);
				ed.add (exif_key, value.get());
			}
676
		}
677
		catch (Exiv2::AnyError& e) {
678
			/* we don't care about invalid key errors */
679
			g_warning ("%s", e.what());
680
		}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
681

682 683 684
		g_free (key);
	}
	g_strfreev (attributes);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
685

686
	// Mandatory tags - add if not already present
Paolo Bacchilega's avatar
Paolo Bacchilega committed
687

688 689 690 691 692 693 694 695
	mandatory_int (ed, "Exif.Image.XResolution", 72);
	mandatory_int (ed, "Exif.Image.YResolution", 72);
	mandatory_int (ed, "Exif.Image.ResolutionUnit", 2);
	mandatory_int (ed, "Exif.Image.YCbCrPositioning", 1);
	mandatory_int (ed, "Exif.Photo.ColorSpace", 1);
	mandatory_string (ed, "Exif.Photo.ExifVersion", "48 50 50 49");
	mandatory_string (ed, "Exif.Photo.ComponentsConfiguration", "1 2 3 0");
	mandatory_string (ed, "Exif.Photo.FlashpixVersion", "48 49 48 48");
Paolo Bacchilega's avatar
Paolo Bacchilega committed
696

697
	// Overwrite the software tag
Paolo Bacchilega's avatar
Paolo Bacchilega committed
698

699
	ed["Exif.Image.Software"] = PACKAGE " " VERSION;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
700

701
	// Update the dimension tags with actual image values
Paolo Bacchilega's avatar
Paolo Bacchilega committed
702

703 704
	int width = 0;
	int height = 0;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
705

706 707
	if (pixbuf != NULL) {
		width = gdk_pixbuf_get_width (pixbuf);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
708 709 710
		if (width > 0)
			ed["Exif.Photo.PixelXDimension"] = width;

711
		height = gdk_pixbuf_get_height (pixbuf);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
712 713
		if (height > 0)
			ed["Exif.Photo.PixelYDimension"] = height;
714

715
		ed["Exif.Image.Orientation"] = 1;
716
	}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
717

718 719
	// Update the thumbnail

720
	Exiv2::ExifThumb thumb(ed);
721 722 723 724 725 726 727 728 729 730 731 732 733
	if ((pixbuf != NULL) && (width > 0) && (height > 0)) {
		GdkPixbuf *thumb_pixbuf;
		char      *buffer;
		gsize      buffer_size;

		scale_keeping_ratio (&width, &height, 128, 128, FALSE);
		thumb_pixbuf = _gdk_pixbuf_scale_simple_safe (pixbuf, width, height, GDK_INTERP_BILINEAR);
		if (gdk_pixbuf_save_to_buffer (thumb_pixbuf, &buffer, &buffer_size, "jpeg", NULL, NULL)) {
			thumb.setJpegThumbnail ((Exiv2::byte*) buffer, buffer_size);
			ed["Exif.Thumbnail.XResolution"] = 72;
			ed["Exif.Thumbnail.YResolution"] = 72;
			ed["Exif.Thumbnail.ResolutionUnit"] =  2;
			g_free (buffer);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
734 735 736 737
		}
		else
			thumb.erase();

738 739 740 741
		g_object_unref (thumb_pixbuf);
	}
	else
		thumb.erase();
Paolo Bacchilega's avatar
Paolo Bacchilega committed
742

743
	// Update the DateTime tag
Paolo Bacchilega's avatar
Paolo Bacchilega committed
744

745 746 747 748 749 750 751
	if (g_file_info_get_attribute_object (info, "Exif::Image::DateTime") == NULL) {
		GTimeVal current_time;
		g_get_current_time (&current_time);
		char *date_time = _g_time_val_to_exif_date (&current_time);
		ed["Exif.Image.DateTime"] = date_time;
		g_free (date_time);
	}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
752

753
	// IPTC Data
Paolo Bacchilega's avatar
Paolo Bacchilega committed
754

755
	Exiv2::IptcData id;
756 757 758 759
	attributes = g_file_info_list_attributes (info, "Iptc");
	for (i = 0; attributes[i] != NULL; i++) {
		GthMetadata *metadatum = (GthMetadata *) g_file_info_get_attribute_object (info, attributes[i]);
		char *key = exiv2_key_from_attribute (attributes[i]);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
760

761
		try {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
762
			const char *raw_value = gth_metadata_get_raw (metadatum);
763
			const char *value_type = gth_main_get_metadata_type (metadatum);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
764 765 766 767 768

			if ((raw_value != NULL) && (strcmp (raw_value, "") != 0) &&  (value_type != NULL)) {
				/* See the exif data code above for an explanation. */
				Exiv2::Value::AutoPtr value = Exiv2::Value::create (Exiv2::TypeInfo::typeId (value_type));
				value->read (raw_value);
769 770 771
				Exiv2::IptcKey iptc_key(key);
				id.add (iptc_key, value.get());
			}
772
		}
773
		catch (Exiv2::AnyError& e) {
774
			/* we don't care about invalid key errors */
775
			g_warning ("%s", e.what());
Paolo Bacchilega's avatar
Paolo Bacchilega committed
776 777
		}

778 779 780
		g_free (key);
	}
	g_strfreev (attributes);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
781

782
	// XMP Data
Paolo Bacchilega's avatar
Paolo Bacchilega committed
783

784
	Exiv2::XmpData xd;
785 786 787 788
	attributes = g_file_info_list_attributes (info, "Xmp");
	for (i = 0; attributes[i] != NULL; i++) {
		GthMetadata *metadatum = (GthMetadata *) g_file_info_get_attribute_object (info, attributes[i]);
		char *key = exiv2_key_from_attribute (attributes[i]);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
789

790 791 792 793 794 795
		// Remove existing tags of the same type.
		// Seems to be needed for storing category keywords.
		// Not exactly sure why!
		Exiv2::XmpData::iterator iter = xd.findKey (Exiv2::XmpKey (key));
		if (iter != xd.end ())
			xd.erase (iter);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
796

797
		try {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
798
			const char *raw_value = gth_metadata_get_raw (metadatum);
799
			const char *value_type = gth_main_get_metadata_type (metadatum);
800

Paolo Bacchilega's avatar
Paolo Bacchilega committed
801
			if ((raw_value != NULL) && (strcmp (raw_value, "") != 0) &&  (value_type != NULL)) {
802
				/* See the exif data code above for an explanation. */
Paolo Bacchilega's avatar
Paolo Bacchilega committed
803 804 805 806
				Exiv2::Value::AutoPtr value = Exiv2::Value::create (Exiv2::TypeInfo::typeId (value_type));
				value->read (raw_value);
				Exiv2::XmpKey xmp_key(key);
				xd.add (xmp_key, value.get());
807
			}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
808
		}
809
		catch (Exiv2::AnyError& e) {
810
			/* we don't care about invalid key errors */
811
			g_warning ("%s", e.what());
812 813 814 815 816 817
		}

		g_free (key);
	}
	g_strfreev (attributes);

818 819 820 821 822 823 824 825 826 827
	try {
		image->setExifData(ed);
		image->setIptcData(id);
		image->setXmpData(xd);
		image->writeMetadata();
	}
	catch (Exiv2::AnyError& e) {
		g_warning ("%s", e.what());
	}

828 829 830 831 832 833 834
	Exiv2::BasicIo &io = image->io();
	io.open();

	return io.read(io.size());
}


835 836
extern "C"
gboolean
837
exiv2_supports_writes (const char *mime_type)
838
{
839 840 841 842 843
	return (g_content_type_equals (mime_type, "image/jpeg")
#if HAVE_EXIV2_020
		|| g_content_type_equals (mime_type, "image/tiff")
#endif
		|| g_content_type_equals (mime_type, "image/png"));
844 845 846
}


847 848 849 850
extern "C"
gboolean
exiv2_write_metadata (SavePixbufData *data)
{
851
	if (exiv2_supports_writes (data->mime_type)) {
852 853 854
		try {
			Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open ((Exiv2::byte*) data->buffer, data->buffer_size);
			g_assert (image.get() != 0);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
855

856
			Exiv2::DataBuf buf = exiv2_write_metadata_private (image, data->file_data->info, data->pixbuf);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
857

858 859 860 861 862 863 864
			g_free (data->buffer);
			data->buffer = g_memdup (buf.pData_, buf.size_);
			data->buffer_size = buf.size_;
		}
		catch (Exiv2::AnyError& e) {
			if (data->error != NULL)
				*data->error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, e.what());
Paolo Bacchilega's avatar
Paolo Bacchilega committed
865
			g_warning ("%s\n", e.what());
866 867
			return FALSE;
		}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
868
	}
869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891

	return TRUE;
}


extern "C"
gboolean
exiv2_write_metadata_to_buffer (void      **buffer,
				gsize      *buffer_size,
				GFileInfo  *info,
				GdkPixbuf  *pixbuf,
				GError    **error)
{
	try {
		Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open ((Exiv2::byte*) *buffer, *buffer_size);
		g_assert (image.get() != 0);

		Exiv2::DataBuf buf = exiv2_write_metadata_private (image, info, pixbuf);

		g_free (*buffer);
		*buffer = g_memdup (buf.pData_, buf.size_);
		*buffer_size = buf.size_;
	}
892
	catch (Exiv2::AnyError& e) {
893
		if (error != NULL)
894
			*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, e.what());
895 896 897 898
		return FALSE;
	}

	return TRUE;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
899
}
900 901


902 903 904
#define MAX_RATIO_ERROR_TOLERANCE 0.01


905 906 907
GdkPixbuf *
exiv2_generate_thumbnail (const char *uri,
			  const char *mime_type,
908
			  int         requested_size)
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
{
	GdkPixbuf *pixbuf = NULL;

	if (! _g_content_type_is_a (mime_type, "image/jpeg")
	    && ! _g_content_type_is_a (mime_type, "image/tiff"))
	{
		return NULL;
	}

	try {
		char *path;

		path = g_filename_from_uri (uri, NULL, NULL);
		if (path != NULL) {
			Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open (path);
			image->readMetadata ();
			Exiv2::ExifThumbC exifThumb (image->exifData ());
			Exiv2::DataBuf thumb = exifThumb.copy ();

			if (thumb.pData_ != NULL) {
				Exiv2::ExifData &ed = image->exifData();
930

931
				long orientation = ed["Exif.Image.Orientation"].toLong();
932 933 934
				long image_width = ed["Exif.Photo.PixelXDimension"].toLong();
				long image_height = ed["Exif.Photo.PixelYDimension"].toLong();

935
				if ((orientation == 1) && (image_width > 0) && (image_height > 0)) {
936 937 938 939 940 941 942 943 944
					GInputStream *stream = g_memory_input_stream_new_from_data (thumb.pData_, thumb.size_, NULL);
					pixbuf = gdk_pixbuf_new_from_stream (stream, NULL, NULL);

					if (pixbuf != NULL) {
						/* Heuristic to find out-of-date thumbnails: the thumbnail and image aspect ratios must be equal */

						double image_ratio = (((double) image_width) / image_height);
						double thumbnail_ratio = (((double) gdk_pixbuf_get_width (pixbuf)) / gdk_pixbuf_get_height (pixbuf));
						double ratio_delta = (image_ratio > thumbnail_ratio) ? (image_ratio - thumbnail_ratio) : (thumbnail_ratio - image_ratio);
945

946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
						if (ratio_delta > MAX_RATIO_ERROR_TOLERANCE) {
							g_object_unref (pixbuf);
							pixbuf = NULL;
						}
						else {
							/* Save the original image size in the pixbuf options */

							char *s = g_strdup_printf ("%ld", image_width);
							gdk_pixbuf_set_option (pixbuf, "tEXt::Thumb::Image::Width", s);
							g_object_set_data (G_OBJECT (pixbuf), "gnome-original-width", GINT_TO_POINTER ((int) image_width));
							g_free (s);

							s = g_strdup_printf ("%ld", image_height);
							gdk_pixbuf_set_option (pixbuf, "tEXt::Thumb::Image::Height", s);
							g_object_set_data (G_OBJECT (pixbuf), "gnome-original-height", GINT_TO_POINTER ((int) image_height));
							g_free (s);

							/* Set the orientation option to correctly rotate the thumbnail
							 * in gnome_desktop_thumbnail_factory_generate_thumbnail() */

966 967 968 969
							long  orientation = ed["Exif.Image.Orientation"].toLong();
							char *orientation_s = g_strdup_printf ("%ld", orientation);
							gdk_pixbuf_set_option (pixbuf, "orientation", orientation_s);
							g_free (orientation_s);
970 971 972 973
						}
					}

					g_object_unref (stream);
974 975 976 977 978 979 980 981 982 983 984
				}
			}

			g_free (path);
		}
	}
	catch (Exiv2::AnyError& e) {
	}

	return pixbuf;
}