exiv2-utils.cpp 23.5 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 26
#define GDK_PIXBUF_ENABLE_BACKEND
#include <gdk-pixbuf/gdk-pixbuf-io.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 68 69
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
70 71 72 73 74 75 76 77 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
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
};

134
const char *_DESCRIPTION_TAG_NAMES[] = {
Paolo Bacchilega's avatar
Paolo Bacchilega committed
135 136 137
	"Exif::Photo::UserComment",
	"Exif::Image::ImageDescription",
	"Xmp::dc::description",
138
	"Xmp::tiff::ImageDescription",
Paolo Bacchilega's avatar
Paolo Bacchilega committed
139 140 141 142 143
	"Iptc::Application2::Caption",
	"Iptc::Application2::Headline",
	NULL
};

144 145 146 147 148
const char *_TITLE_TAG_NAMES[] = {
	"Xmp::dc::title",
	NULL
};

Paolo Bacchilega's avatar
Paolo Bacchilega committed
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
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, ".", "::");
}


177 178 179 180 181 182 183 184 185 186 187 188 189 190
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;
}


191
static void
Paolo Bacchilega's avatar
Paolo Bacchilega committed
192 193 194 195 196
set_file_info (GFileInfo  *info,
	       const char *key,
	       const char *description,
	       const char *formatted_value,
	       const char *raw_value,
197 198
	       const char *category,
	       const char *type_name)
Paolo Bacchilega's avatar
Paolo Bacchilega committed
199 200 201 202 203 204 205 206 207 208 209 210
{
	char            *attribute;
	GthMetadataInfo *metadata_info;
	GthMetadata     *metadata;
	char            *description_utf8;
	char            *formatted_value_utf8;

	if (_g_utf8_all_spaces (formatted_value))
		return;

	attribute = exiv2_key_to_attribute (key);
	description_utf8 = g_locale_to_utf8 (description, -1, NULL, NULL, NULL);
211 212 213 214 215 216 217 218
	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);
	}
219 220 221 222 223 224 225 226 227
	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
228 229 230 231 232 233 234 235 236 237

/*
g_print ("%s (%s): %s (%s)\n", key, description, formatted_value, raw_value);
*/

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

		info.id = attribute;
238
		info.type = (type_name != NULL) ? g_strdup (type_name) : NULL;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287
		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);
	}

	if ((metadata_info->display_name == NULL) && (description_utf8 != NULL))
		metadata_info->display_name = g_strdup (description_utf8);

	metadata = gth_metadata_new ();
	g_object_set (metadata, "id", key, "description", description_utf8, "formatted", formatted_value_utf8, "raw", raw_value, NULL);
	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;

	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,
		      NULL);
288
	set_file_info (info, attribute, description, formatted_value, raw_value, NULL, NULL);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
289 290 291 292
}


static void
293 294 295
set_string_list_attribute_from_tagset (GFileInfo  *info,
				       const char *attribute,
				       const char *tagset[])
Paolo Bacchilega's avatar
Paolo Bacchilega committed
296
{
297 298 299 300 301
	GObject        *metadata;
	int             i;
	char           *raw;
	char          **keywords;
	GthStringList  *string_list;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
302

303 304 305 306 307 308 309 310 311 312 313
	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);
314
	keywords = g_strsplit (raw, ", ", -1);
315 316 317 318 319 320 321
	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);
}

322

323 324 325
static void
set_attributes_from_tagsets (GFileInfo *info)
{
326
	set_attribute_from_tagset (info, "general::datetime", _DATE_TAG_NAMES);
327
	set_attribute_from_tagset (info, "general::description", _DESCRIPTION_TAG_NAMES);
328
	set_attribute_from_tagset (info, "general::title", _TITLE_TAG_NAMES);
329 330
	set_attribute_from_tagset (info, "general::location", _LOCATION_TAG_NAMES);
	set_string_list_attribute_from_tagset (info, "general::tags", _KEYWORDS_TAG_NAMES);
331
	set_attribute_from_tagset (info, "Embedded::Photo::DateTimeOriginal", _ORIGINAL_DATE_TAG_NAMES);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
	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";
}


357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384
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) {
			stringstream value;
			value << *md;

			stringstream short_name;
			if (md->ifdId () > Exiv2::ifd1Id) {
				// Must be a MakerNote - include group name
				short_name << md->groupName() << "." << md->tagName();
			}
			else {
				// Normal exif tag - just use tag name
				short_name << md->tagName();
			}

			set_file_info (info,
				       md->key().c_str(),
				       short_name.str().c_str(),
				       value.str().c_str(),
				       md->toString().c_str(),
385 386
				       get_exif_default_category (*md),
				       md->typeName());
387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
		}
	}

	Exiv2::IptcData &iptcData = image->iptcData();
	if (! iptcData.empty()) {
		Exiv2::IptcData::iterator end = iptcData.end();
		for (Exiv2::IptcData::iterator md = iptcData.begin(); md != end; ++md) {
			stringstream value;
			value << *md;

			stringstream short_name;
			short_name << md->tagName();

			set_file_info (info,
				       md->key().c_str(),
				       short_name.str().c_str(),
				       value.str().c_str(),
				       md->toString().c_str(),
405 406
				       "Iptc",
				       md->typeName());
407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424
		}
	}

	Exiv2::XmpData &xmpData = image->xmpData();
	if (! xmpData.empty()) {
		Exiv2::XmpData::iterator end = xmpData.end();
		for (Exiv2::XmpData::iterator md = xmpData.begin(); md != end; ++md) {
			stringstream value;
			value << *md;

			stringstream short_name;
			short_name << md->groupName() << "." << md->tagName();

			set_file_info (info,
				       md->key().c_str(),
				       short_name.str().c_str(),
				       value.str().c_str(),
				       md->toString().c_str(),
425 426
				       "Xmp::Embedded",
				       md->typeName());
427 428 429 430 431 432 433
		}
	}

	set_attributes_from_tagsets (info);
}


Paolo Bacchilega's avatar
Paolo Bacchilega committed
434
/*
435
 * exiv2_read_metadata_from_file
Paolo Bacchilega's avatar
Paolo Bacchilega committed
436 437 438 439 440 441
 * reads metadata from image files
 * code relies heavily on example1 from the exiv2 website
 * http://www.exiv2.org/example1.html
 */
extern "C"
gboolean
442 443 444
exiv2_read_metadata_from_file (GFile      *file,
			       GFileInfo  *info,
			       GError    **error)
Paolo Bacchilega's avatar
Paolo Bacchilega committed
445 446 447 448 449
{
	try {
		char *path;

		path = g_file_get_path (file);
450 451 452 453 454 455
		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
456 457 458 459
		Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(path);
		g_free (path);

		if (image.get() == 0) {
460 461
			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
462 463 464
			return FALSE;
		}

465 466
		exiv2_read_metadata (image, info);
	}
467
	catch (Exiv2::AnyError& e) {
468
		if (error != NULL)
469
			*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, e.what());
470 471
		return FALSE;
	}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
472

473 474
	return TRUE;
}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
475 476


477 478 479 480 481 482 483 484 485
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
486

487 488 489 490
		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
491 492
		}

493
		exiv2_read_metadata (image, info);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
494
	}
495
	catch (Exiv2::AnyError& e) {
496
		if (error != NULL)
497
			*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, e.what());
Paolo Bacchilega's avatar
Paolo Bacchilega committed
498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513
		return FALSE;
	}

	return TRUE;
}


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

		path = g_file_get_path (file);
514 515 516
		if (path == NULL)
			return FALSE;

Paolo Bacchilega's avatar
Paolo Bacchilega committed
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540
		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) {
				stringstream value;
				value << *md;

				stringstream short_name;
				short_name << md->groupName() << "." << md->tagName();

				set_file_info (info,
					       md->key().c_str(),
					       short_name.str().c_str(),
					       value.str().c_str(),
					       md->toString().c_str(),
541 542
					       "Xmp::Sidecar",
					       md->typeName());
Paolo Bacchilega's avatar
Paolo Bacchilega committed
543 544 545 546 547 548 549
			}
		}
		Exiv2::XmpParser::terminate();

		set_attributes_from_tagsets (info);
	}
	catch (Exiv2::AnyError& e) {
550
		std::cerr << "Caught Exiv2 exception '" << e << "'\n";
Paolo Bacchilega's avatar
Paolo Bacchilega committed
551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579
		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;
}


580 581 582 583
static Exiv2::DataBuf
exiv2_write_metadata_private (Exiv2::Image::AutoPtr  image,
			      GFileInfo             *info,
			      GdkPixbuf             *pixbuf)
Paolo Bacchilega's avatar
Paolo Bacchilega committed
584
{
585 586
	char **attributes;
	int    i;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
587

588
	image->readMetadata();
Paolo Bacchilega's avatar
Paolo Bacchilega committed
589

590
	// EXIF Data
Paolo Bacchilega's avatar
Paolo Bacchilega committed
591

592 593 594 595 596
	Exiv2::ExifData &ed = image->exifData();
	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
597

598 599
		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
600

601
		try {
602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618
			/* 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,
			 * the type defaults to Ascii.
			 * We always create the metadatum explicilty if the
			 * type is available to avoid type errors.
			 * See bug #610389 for more details.  The original
			 * expanation is here:
			 * http://uk.groups.yahoo.com/group/exiv2/message/1472
			 */

			GthMetadataInfo *metadatum_info = gth_main_get_metadata_info (attributes[i]);
			if ((metadatum_info != NULL) && (metadatum_info->type != NULL)) {
				Exiv2::Value::AutoPtr value = Exiv2::Value::create (Exiv2::TypeInfo::typeId (metadatum_info->type));
				Exiv2::ExifKey exif_key(key);
				ed.add (exif_key, value.get());
			}
619 620
			ed[key] = gth_metadata_get_raw (metadatum);
		}
621
		catch (Exiv2::AnyError& e) {
622
			/* we don't care about invalid key errors */
623
			g_warning ("%s", e.what());
624
		}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
625

626 627 628
		g_free (key);
	}
	g_strfreev (attributes);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
629

630
	// Mandatory tags - add if not already present
Paolo Bacchilega's avatar
Paolo Bacchilega committed
631

632 633 634 635 636 637 638 639
	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
640

641
	// Overwrite the software tag
Paolo Bacchilega's avatar
Paolo Bacchilega committed
642

643
	ed["Exif.Image.Software"] = PACKAGE " " VERSION;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
644

645
	// Update the dimension tags with actual image values
Paolo Bacchilega's avatar
Paolo Bacchilega committed
646

647 648
	int width = 0;
	int height = 0;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
649

650 651
	if (pixbuf != NULL) {
		width = gdk_pixbuf_get_width (pixbuf);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
652 653 654
		if (width > 0)
			ed["Exif.Photo.PixelXDimension"] = width;

655
		height = gdk_pixbuf_get_height (pixbuf);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
656 657
		if (height > 0)
			ed["Exif.Photo.PixelYDimension"] = height;
658

659
		ed["Exif.Image.Orientation"] = 1;
660
	}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
661

662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677
	// Update the thumbnail

	Exiv2::ExifThumb thumb(image->exifData());
	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
678 679 680 681
		}
		else
			thumb.erase();

682 683 684 685
		g_object_unref (thumb_pixbuf);
	}
	else
		thumb.erase();
Paolo Bacchilega's avatar
Paolo Bacchilega committed
686

687
	// Update the DateTime tag
Paolo Bacchilega's avatar
Paolo Bacchilega committed
688

689 690 691 692 693 694 695
	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
696

697
	// IPTC Data
Paolo Bacchilega's avatar
Paolo Bacchilega committed
698

699 700 701 702 703
	Exiv2::IptcData &id = image->iptcData();
	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
704

705
		try {
706 707 708 709 710 711 712
			/* See the exif data code above for an explanation. */
			GthMetadataInfo *metadatum_info = gth_main_get_metadata_info (attributes[i]);
			if ((metadatum_info != NULL) && (metadatum_info->type != NULL)) {
				Exiv2::Value::AutoPtr value = Exiv2::Value::create (Exiv2::TypeInfo::typeId (metadatum_info->type));
				Exiv2::IptcKey iptc_key(key);
				id.add (iptc_key, value.get());
			}
713 714
			id[key] = gth_metadata_get_raw (metadatum);
		}
715
		catch (Exiv2::AnyError& e) {
716
			/* we don't care about invalid key errors */
717
			g_warning ("%s", e.what());
Paolo Bacchilega's avatar
Paolo Bacchilega committed
718 719
		}

720 721 722
		g_free (key);
	}
	g_strfreev (attributes);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
723

724
	// XMP Data
Paolo Bacchilega's avatar
Paolo Bacchilega committed
725

726 727 728 729 730
	Exiv2::XmpData &xd = image->xmpData();
	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
731

732 733 734 735 736 737
		// 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
738

739
		try {
740 741
			const char *value = gth_metadata_get_raw (metadatum);

742 743 744 745 746 747 748 749
			if ((value != NULL) && strcmp (value, "") != 0) {
				/* See the exif data code above for an explanation. */
				GthMetadataInfo *metadatum_info = gth_main_get_metadata_info (attributes[i]);
				if ((metadatum_info != NULL) && (metadatum_info->type != NULL)) {
					Exiv2::Value::AutoPtr value = Exiv2::Value::create (Exiv2::TypeInfo::typeId (metadatum_info->type));
					Exiv2::XmpKey xmp_key(key);
					xd.add (xmp_key, value.get());
				}
750
				xd[key] = gth_metadata_get_raw (metadatum);
751
			}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
752
		}
753
		catch (Exiv2::AnyError& e) {
754
			/* we don't care about invalid key errors */
755
			g_warning ("%s", e.what());
756 757 758 759 760 761 762 763 764 765 766 767 768 769
		}

		g_free (key);
	}
	g_strfreev (attributes);

	image->writeMetadata();
	Exiv2::BasicIo &io = image->io();
	io.open();

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


770 771
extern "C"
gboolean
772
exiv2_supports_writes (const char *mime_type)
773
{
774 775
	return (_g_content_type_is_a (mime_type, "image/jpeg") ||
		_g_content_type_is_a (mime_type, "image/png"));
776 777 778
}


779 780 781 782
extern "C"
gboolean
exiv2_write_metadata (SavePixbufData *data)
{
783
	if (exiv2_supports_writes (data->mime_type)) {
784 785 786
		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
787

788
			Exiv2::DataBuf buf = exiv2_write_metadata_private (image, data->file_data->info, data->pixbuf);
Paolo Bacchilega's avatar
Paolo Bacchilega committed
789

790 791 792 793 794 795 796
			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
797
			g_warning ("%s\n", e.what());
798 799
			return FALSE;
		}
Paolo Bacchilega's avatar
Paolo Bacchilega committed
800
	}
801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823

	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_;
	}
824
	catch (Exiv2::AnyError& e) {
825
		if (error != NULL)
826
			*error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_FAILED, e.what());
827 828 829 830
		return FALSE;
	}

	return TRUE;
Paolo Bacchilega's avatar
Paolo Bacchilega committed
831
}
832 833


834 835 836
#define MAX_RATIO_ERROR_TOLERANCE 0.01


837 838 839
GdkPixbuf *
exiv2_generate_thumbnail (const char *uri,
			  const char *mime_type,
840
			  int         requested_size)
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861
{
	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();
862

863
				long orientation = ed["Exif.Image.Orientation"].toLong();
864 865 866
				long image_width = ed["Exif.Photo.PixelXDimension"].toLong();
				long image_height = ed["Exif.Photo.PixelYDimension"].toLong();

867
				if ((orientation == 1) && (image_width > 0) && (image_height > 0)) {
868 869 870 871 872 873 874 875 876
					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);
877

878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897
						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() */

898 899 900 901
							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);
902 903 904 905
						}
					}

					g_object_unref (stream);
906 907 908 909 910 911 912 913 914 915 916
				}
			}

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

	return pixbuf;
}