3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
19 * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
20 * @copyright Copyright © 2005, Ævar Arnfjörð Bjarmason
21 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
22 * @see http://exif.org/Exif2-2.PDF The Exif 2.2 specification
27 * @todo document (e.g. one-sentence class-overview description)
32 const BYTE = 1; //!< An 8-bit (1-byte) unsigned integer.
33 const ASCII = 2; //!< An 8-bit byte containing one 7-bit ASCII code. The final byte is terminated with NULL.
34 const SHORT = 3; //!< A 16-bit (2-byte) unsigned integer.
35 const LONG = 4; //!< A 32-bit (4-byte) unsigned integer.
36 const RATIONAL = 5; //!< Two LONGs. The first LONG is the numerator and the second LONG expresses the denominator
37 const UNDEFINED = 7; //!< An 8-bit byte that can take any value depending on the field definition
38 const SLONG = 9; //!< A 32-bit (4-byte) signed integer (2's complement notation),
39 const SRATIONAL = 10; //!< Two SLONGs. The first SLONG is the numerator and the second SLONG is the denominator.
47 * Exif tags grouped by category, the tagname itself is the key and the type
48 * is the value, in the case of more than one possible value type they are
49 * separated by commas.
54 * A one dimentional array of all Exif tags
59 * The raw Exif data returned by exif_read_data()
64 * A Filtered version of $mRawExifData that has been pruned of invalid
65 * tags and tags that contain content they shouldn't contain according
66 * to the Exif specification
68 var $mFilteredExifData;
71 * Filtered and formatted Exif data, see FormatExif::getFormattedData()
73 var $mFormattedExifData;
83 * The file being processed
88 * The basename of the file being processed
93 * The private log to log to, e.g. 'exif'
102 * @param $file String: filename.
104 function __construct( $file ) {
106 * Page numbers here refer to pages in the EXIF 2.2 standard
108 * @link http://exif.org/Exif2-2.PDF The Exif 2.2 specification
110 $this->mExifTags = array(
111 # TIFF Rev. 6.0 Attribute Information (p22)
113 # Tags relating to image structure
114 'structure' => array(
115 'ImageWidth' => Exif::SHORT.','.Exif::LONG, # Image width
116 'ImageLength' => Exif::SHORT.','.Exif::LONG, # Image height
117 'BitsPerSample' => Exif::SHORT, # Number of bits per component
118 # "When a primary image is JPEG compressed, this designation is not"
119 # "necessary and is omitted." (p23)
120 'Compression' => Exif::SHORT, # Compression scheme #p23
121 'PhotometricInterpretation' => Exif::SHORT, # Pixel composition #p23
122 'Orientation' => Exif::SHORT, # Orientation of image #p24
123 'SamplesPerPixel' => Exif::SHORT, # Number of components
124 'PlanarConfiguration' => Exif::SHORT, # Image data arrangement #p24
125 'YCbCrSubSampling' => Exif::SHORT, # Subsampling ratio of Y to C #p24
126 'YCbCrPositioning' => Exif::SHORT, # Y and C positioning #p24-25
127 'XResolution' => Exif::RATIONAL, # Image resolution in width direction
128 'YResolution' => Exif::RATIONAL, # Image resolution in height direction
129 'ResolutionUnit' => Exif::SHORT, # Unit of X and Y resolution #(p26)
132 # Tags relating to recording offset
134 'StripOffsets' => Exif::SHORT.','.Exif::LONG, # Image data location
135 'RowsPerStrip' => Exif::SHORT.','.Exif::LONG, # Number of rows per strip
136 'StripByteCounts' => Exif::SHORT.','.Exif::LONG, # Bytes per compressed strip
137 'JPEGInterchangeFormat' => Exif::SHORT.','.Exif::LONG, # Offset to JPEG SOI
138 'JPEGInterchangeFormatLength' => Exif::SHORT.','.Exif::LONG, # Bytes of JPEG data
141 # Tags relating to image data characteristics
142 'characteristics' => array(
143 'TransferFunction' => Exif::SHORT, # Transfer function
144 'WhitePoint' => Exif::RATIONAL, # White point chromaticity
145 'PrimaryChromaticities' => Exif::RATIONAL, # Chromaticities of primarities
146 'YCbCrCoefficients' => Exif::RATIONAL, # Color space transformation matrix coefficients #p27
147 'ReferenceBlackWhite' => Exif::RATIONAL # Pair of black and white reference values
152 'DateTime' => Exif::ASCII, # File change date and time
153 'ImageDescription' => Exif::ASCII, # Image title
154 'Make' => Exif::ASCII, # Image input equipment manufacturer
155 'Model' => Exif::ASCII, # Image input equipment model
156 'Software' => Exif::ASCII, # Software used
157 'Artist' => Exif::ASCII, # Person who created the image
158 'Copyright' => Exif::ASCII, # Copyright holder
162 # Exif IFD Attribute Information (p30-31)
164 # Tags relating to version
166 # TODO: NOTE: Nonexistence of this field is taken to mean nonconformance
167 # to the EXIF 2.1 AND 2.2 standards
168 'ExifVersion' => Exif::UNDEFINED, # Exif version
169 'FlashpixVersion' => Exif::UNDEFINED, # Supported Flashpix version #p32
172 # Tags relating to Image Data Characteristics
173 'characteristics' => array(
174 'ColorSpace' => Exif::SHORT, # Color space information #p32
177 # Tags relating to image configuration
178 'configuration' => array(
179 'ComponentsConfiguration' => Exif::UNDEFINED, # Meaning of each component #p33
180 'CompressedBitsPerPixel' => Exif::RATIONAL, # Image compression mode
181 'PixelYDimension' => Exif::SHORT.','.Exif::LONG, # Valid image width
182 'PixelXDimension' => Exif::SHORT.','.Exif::LONG, # Valind image height
185 # Tags relating to related user information
187 'MakerNote' => Exif::UNDEFINED, # Manufacturer notes
188 'UserComment' => Exif::UNDEFINED, # User comments #p34
191 # Tags relating to related file information
193 'RelatedSoundFile' => Exif::ASCII, # Related audio file
196 # Tags relating to date and time
197 'dateandtime' => array(
198 'DateTimeOriginal' => Exif::ASCII, # Date and time of original data generation #p36
199 'DateTimeDigitized' => Exif::ASCII, # Date and time of original data generation
200 'SubSecTime' => Exif::ASCII, # DateTime subseconds
201 'SubSecTimeOriginal' => Exif::ASCII, # DateTimeOriginal subseconds
202 'SubSecTimeDigitized' => Exif::ASCII, # DateTimeDigitized subseconds
205 # Tags relating to picture-taking conditions (p31)
206 'conditions' => array(
207 'ExposureTime' => Exif::RATIONAL, # Exposure time
208 'FNumber' => Exif::RATIONAL, # F Number
209 'ExposureProgram' => Exif::SHORT, # Exposure Program #p38
210 'SpectralSensitivity' => Exif::ASCII, # Spectral sensitivity
211 'ISOSpeedRatings' => Exif::SHORT, # ISO speed rating
212 'OECF' => Exif::UNDEFINED, # Optoelectronic conversion factor
213 'ShutterSpeedValue' => Exif::SRATIONAL, # Shutter speed
214 'ApertureValue' => Exif::RATIONAL, # Aperture
215 'BrightnessValue' => Exif::SRATIONAL, # Brightness
216 'ExposureBiasValue' => Exif::SRATIONAL, # Exposure bias
217 'MaxApertureValue' => Exif::RATIONAL, # Maximum land aperture
218 'SubjectDistance' => Exif::RATIONAL, # Subject distance
219 'MeteringMode' => Exif::SHORT, # Metering mode #p40
220 'LightSource' => Exif::SHORT, # Light source #p40-41
221 'Flash' => Exif::SHORT, # Flash #p41-42
222 'FocalLength' => Exif::RATIONAL, # Lens focal length
223 'SubjectArea' => Exif::SHORT, # Subject area
224 'FlashEnergy' => Exif::RATIONAL, # Flash energy
225 'SpatialFrequencyResponse' => Exif::UNDEFINED, # Spatial frequency response
226 'FocalPlaneXResolution' => Exif::RATIONAL, # Focal plane X resolution
227 'FocalPlaneYResolution' => Exif::RATIONAL, # Focal plane Y resolution
228 'FocalPlaneResolutionUnit' => Exif::SHORT, # Focal plane resolution unit #p46
229 'SubjectLocation' => Exif::SHORT, # Subject location
230 'ExposureIndex' => Exif::RATIONAL, # Exposure index
231 'SensingMethod' => Exif::SHORT, # Sensing method #p46
232 'FileSource' => Exif::UNDEFINED, # File source #p47
233 'SceneType' => Exif::UNDEFINED, # Scene type #p47
234 'CFAPattern' => Exif::UNDEFINED, # CFA pattern
235 'CustomRendered' => Exif::SHORT, # Custom image processing #p48
236 'ExposureMode' => Exif::SHORT, # Exposure mode #p48
237 'WhiteBalance' => Exif::SHORT, # White Balance #p49
238 'DigitalZoomRatio' => Exif::RATIONAL, # Digital zoom ration
239 'FocalLengthIn35mmFilm' => Exif::SHORT, # Focal length in 35 mm film
240 'SceneCaptureType' => Exif::SHORT, # Scene capture type #p49
241 'GainControl' => Exif::RATIONAL, # Scene control #p49-50
242 'Contrast' => Exif::SHORT, # Contrast #p50
243 'Saturation' => Exif::SHORT, # Saturation #p50
244 'Sharpness' => Exif::SHORT, # Sharpness #p50
245 'DeviceSettingDescription' => Exif::UNDEFINED, # Desice settings description
246 'SubjectDistanceRange' => Exif::SHORT, # Subject distance range #p51
250 'ImageUniqueID' => Exif::ASCII, # Unique image ID
254 # GPS Attribute Information (p52)
256 'GPSVersionID' => Exif::BYTE, # GPS tag version
257 'GPSLatitudeRef' => Exif::ASCII, # North or South Latitude #p52-53
258 'GPSLatitude' => Exif::RATIONAL, # Latitude
259 'GPSLongitudeRef' => Exif::ASCII, # East or West Longitude #p53
260 'GPSLongitude' => Exif::RATIONAL, # Longitude
261 'GPSAltitudeRef' => Exif::BYTE, # Altitude reference
262 'GPSAltitude' => Exif::RATIONAL, # Altitude
263 'GPSTimeStamp' => Exif::RATIONAL, # GPS time (atomic clock)
264 'GPSSatellites' => Exif::ASCII, # Satellites used for measurement
265 'GPSStatus' => Exif::ASCII, # Receiver status #p54
266 'GPSMeasureMode' => Exif::ASCII, # Measurement mode #p54-55
267 'GPSDOP' => Exif::RATIONAL, # Measurement precision
268 'GPSSpeedRef' => Exif::ASCII, # Speed unit #p55
269 'GPSSpeed' => Exif::RATIONAL, # Speed of GPS receiver
270 'GPSTrackRef' => Exif::ASCII, # Reference for direction of movement #p55
271 'GPSTrack' => Exif::RATIONAL, # Direction of movement
272 'GPSImgDirectionRef' => Exif::ASCII, # Reference for direction of image #p56
273 'GPSImgDirection' => Exif::RATIONAL, # Direction of image
274 'GPSMapDatum' => Exif::ASCII, # Geodetic survey data used
275 'GPSDestLatitudeRef' => Exif::ASCII, # Reference for latitude of destination #p56
276 'GPSDestLatitude' => Exif::RATIONAL, # Latitude destination
277 'GPSDestLongitudeRef' => Exif::ASCII, # Reference for longitude of destination #p57
278 'GPSDestLongitude' => Exif::RATIONAL, # Longitude of destination
279 'GPSDestBearingRef' => Exif::ASCII, # Reference for bearing of destination #p57
280 'GPSDestBearing' => Exif::RATIONAL, # Bearing of destination
281 'GPSDestDistanceRef' => Exif::ASCII, # Reference for distance to destination #p57-58
282 'GPSDestDistance' => Exif::RATIONAL, # Distance to destination
283 'GPSProcessingMethod' => Exif::UNDEFINED, # Name of GPS processing method
284 'GPSAreaInformation' => Exif::UNDEFINED, # Name of GPS area
285 'GPSDateStamp' => Exif::ASCII, # GPS date
286 'GPSDifferential' => Exif::SHORT, # GPS differential correction
291 $this->basename = wfBaseName( $this->file );
293 $this->makeFlatExifTags();
295 $this->debugFile( $this->basename, __FUNCTION__, true );
296 wfSuppressWarnings();
297 $data = exif_read_data( $this->file );
300 * exif_read_data() will return false on invalid input, such as
301 * when somebody uploads a file called something.jpeg
302 * containing random gibberish.
304 $this->mRawExifData = $data ? $data : array();
306 $this->makeFilteredData();
307 $this->makeFormattedData();
309 $this->debugFile( __FUNCTION__, false );
316 * Generate a flat list of the exif tags
318 function makeFlatExifTags() {
319 $this->extractTags( $this->mExifTags );
323 * A recursing extractor function used by makeFlatExifTags()
325 * Note: This used to use an array_walk function, but it made PHP5
326 * segfault, see `cvs diff -u -r 1.4 -r 1.5 Exif.php`
328 function extractTags( &$tagset ) {
329 foreach( $tagset as $key => $val ) {
330 if( is_array( $val ) ) {
331 $this->extractTags( $val );
333 $this->mFlatExifTags[$key] = $val;
339 * Make $this->mFilteredExifData
341 function makeFilteredData() {
342 $this->mFilteredExifData = $this->mRawExifData;
344 foreach( $this->mFilteredExifData as $k => $v ) {
345 if ( !in_array( $k, array_keys( $this->mFlatExifTags ) ) ) {
346 $this->debug( $v, __FUNCTION__, "'$k' is not a valid Exif tag" );
347 unset( $this->mFilteredExifData[$k] );
351 foreach( $this->mFilteredExifData as $k => $v ) {
352 if ( !$this->validate($k, $v) ) {
353 $this->debug( $v, __FUNCTION__, "'$k' contained invalid data" );
354 unset( $this->mFilteredExifData[$k] );
362 function makeFormattedData( ) {
363 $format = new FormatExif( $this->getFilteredData() );
364 $this->mFormattedExifData = $format->getFormattedData();
372 * Get $this->mRawExifData
375 return $this->mRawExifData;
379 * Get $this->mFilteredExifData
381 function getFilteredData() {
382 return $this->mFilteredExifData;
386 * Get $this->mFormattedExifData
388 function getFormattedData() {
389 return $this->mFormattedExifData;
394 * The version of the output format
396 * Before the actual metadata information is saved in the database we
397 * strip some of it since we don't want to save things like thumbnails
398 * which usually accompany Exif data. This value gets saved in the
399 * database along with the actual Exif data, and if the version in the
400 * database doesn't equal the value returned by this function the Exif
401 * data is regenerated.
405 public static function version() {
406 return 1; // We don't need no bloddy constants!
410 * Validates if a tag value is of the type it should be according to the Exif spec
414 * @param $in Mixed: the input value to check
417 function isByte( $in ) {
418 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 255 ) {
419 $this->debug( $in, __FUNCTION__, true );
422 $this->debug( $in, __FUNCTION__, false );
427 function isASCII( $in ) {
428 if ( is_array( $in ) ) {
432 if ( preg_match( "/[^\x0a\x20-\x7e]/", $in ) ) {
433 $this->debug( $in, __FUNCTION__, 'found a character not in our whitelist' );
437 if ( preg_match( '/^\s*$/', $in ) ) {
438 $this->debug( $in, __FUNCTION__, 'input consisted solely of whitespace' );
445 function isShort( $in ) {
446 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 65536 ) {
447 $this->debug( $in, __FUNCTION__, true );
450 $this->debug( $in, __FUNCTION__, false );
455 function isLong( $in ) {
456 if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 4294967296 ) {
457 $this->debug( $in, __FUNCTION__, true );
460 $this->debug( $in, __FUNCTION__, false );
465 function isRational( $in ) {
467 if ( !is_array( $in ) && @preg_match( '/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero
468 return $this->isLong( $m[1] ) && $this->isLong( $m[2] );
470 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
475 function isUndefined( $in ) {
476 if ( !is_array( $in ) && preg_match( '/^\d{4}$/', $in ) ) { // Allow ExifVersion and FlashpixVersion
477 $this->debug( $in, __FUNCTION__, true );
480 $this->debug( $in, __FUNCTION__, false );
485 function isSlong( $in ) {
486 if ( $this->isLong( abs( $in ) ) ) {
487 $this->debug( $in, __FUNCTION__, true );
490 $this->debug( $in, __FUNCTION__, false );
495 function isSrational( $in ) {
497 if ( !is_array( $in ) && preg_match( '/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero
498 return $this->isSlong( $m[0] ) && $this->isSlong( $m[1] );
500 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
507 * Validates if a tag has a legal value according to the Exif spec
511 * @param $tag String: the tag to check.
512 * @param $val Mixed: the value of the tag.
515 function validate( $tag, $val ) {
516 $debug = "tag is '$tag'";
517 // Does not work if not typecast
518 switch( (string)$this->mFlatExifTags[$tag] ) {
519 case (string)Exif::BYTE:
520 $this->debug( $val, __FUNCTION__, $debug );
521 return $this->isByte( $val );
522 case (string)Exif::ASCII:
523 $this->debug( $val, __FUNCTION__, $debug );
524 return $this->isASCII( $val );
525 case (string)Exif::SHORT:
526 $this->debug( $val, __FUNCTION__, $debug );
527 return $this->isShort( $val );
528 case (string)Exif::LONG:
529 $this->debug( $val, __FUNCTION__, $debug );
530 return $this->isLong( $val );
531 case (string)Exif::RATIONAL:
532 $this->debug( $val, __FUNCTION__, $debug );
533 return $this->isRational( $val );
534 case (string)Exif::UNDEFINED:
535 $this->debug( $val, __FUNCTION__, $debug );
536 return $this->isUndefined( $val );
537 case (string)Exif::SLONG:
538 $this->debug( $val, __FUNCTION__, $debug );
539 return $this->isSlong( $val );
540 case (string)Exif::SRATIONAL:
541 $this->debug( $val, __FUNCTION__, $debug );
542 return $this->isSrational( $val );
543 case (string)Exif::SHORT.','.Exif::LONG:
544 $this->debug( $val, __FUNCTION__, $debug );
545 return $this->isShort( $val ) || $this->isLong( $val );
547 $this->debug( $val, __FUNCTION__, "The tag '$tag' is unknown" );
553 * Convenience function for debugging output
558 * @param $fname String:
559 * @param $action Mixed: , default NULL.
561 function debug( $in, $fname, $action = null ) {
565 $type = gettype( $in );
566 $class = ucfirst( __CLASS__ );
567 if ( $type === 'array' )
568 $in = print_r( $in, true );
570 if ( $action === true )
571 wfDebugLog( $this->log, "$class::$fname: accepted: '$in' (type: $type)\n");
572 elseif ( $action === false )
573 wfDebugLog( $this->log, "$class::$fname: rejected: '$in' (type: $type)\n");
574 elseif ( $action === null )
575 wfDebugLog( $this->log, "$class::$fname: input was: '$in' (type: $type)\n");
577 wfDebugLog( $this->log, "$class::$fname: $action (type: $type; content: '$in')\n");
581 * Convenience function for debugging output
585 * @param $fname String: the name of the function calling this function
586 * @param $io Boolean: Specify whether we're beginning or ending
588 function debugFile( $fname, $io ) {
592 $class = ucfirst( __CLASS__ );
594 wfDebugLog( $this->log, "$class::$fname: begin processing: '{$this->basename}'\n" );
596 wfDebugLog( $this->log, "$class::$fname: end processing: '{$this->basename}'\n" );
603 * @todo document (e.g. one-sentence class-overview description)
608 * The Exif data to format
618 * @param $exif Array: the Exif data to format ( as returned by
619 * Exif::getFilteredData() )
621 function FormatExif( $exif ) {
622 $this->mExif = $exif;
626 * Numbers given by Exif user agents are often magical, that is they
627 * should be replaced by a detailed explanation depending on their
628 * value which most of the time are plain integers. This function
629 * formats Exif values into human readable form.
633 function getFormattedData() {
636 $tags =& $this->mExif;
638 $resolutionunit = !isset( $tags['ResolutionUnit'] ) || $tags['ResolutionUnit'] == 2 ? 2 : 3;
639 unset( $tags['ResolutionUnit'] );
641 foreach( $tags as $tag => $val ) {
646 $tags[$tag] = $this->msg( $tag, $val );
654 case 'PhotometricInterpretation':
657 $tags[$tag] = $this->msg( $tag, $val );
667 case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
668 $tags[$tag] = $this->msg( $tag, $val );
676 case 'PlanarConfiguration':
679 $tags[$tag] = $this->msg( $tag, $val );
687 // TODO: YCbCrSubSampling
688 // TODO: YCbCrPositioning
692 switch( $resolutionunit ) {
694 $tags[$tag] = $this->msg( 'XYResolution', 'i', $this->formatNum( $val ) );
697 $this->msg( 'XYResolution', 'c', $this->formatNum( $val ) );
705 // TODO: YCbCrCoefficients #p27 (see annex E)
706 case 'ExifVersion': case 'FlashpixVersion':
707 $tags[$tag] = "$val"/100;
712 case 1: case 'FFFF.H':
713 $tags[$tag] = $this->msg( $tag, $val );
721 case 'ComponentsConfiguration':
723 case 0: case 1: case 2: case 3: case 4: case 5: case 6:
724 $tags[$tag] = $this->msg( $tag, $val );
733 case 'DateTimeOriginal':
734 case 'DateTimeDigitized':
735 if( $val == '0000:00:00 00:00:00' ) {
736 $tags[$tag] = wfMsg('exif-unknowndate');
737 } elseif( preg_match( '/^(?:\d{4}):(?:\d\d):(?:\d\d) (?:\d\d):(?:\d\d):(?:\d\d)$/', $val ) ) {
738 $tags[$tag] = $wgLang->timeanddate( wfTimestamp(TS_MW, $val) );
742 case 'ExposureProgram':
744 case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
745 $tags[$tag] = $this->msg( $tag, $val );
753 case 'SubjectDistance':
754 $tags[$tag] = $this->msg( $tag, '', $this->formatNum( $val ) );
759 case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 255:
760 $tags[$tag] = $this->msg( $tag, $val );
770 case 0: case 1: case 2: case 3: case 4: case 9: case 10: case 11:
771 case 12: case 13: case 14: case 15: case 17: case 18: case 19: case 20:
772 case 21: case 22: case 23: case 24: case 255:
773 $tags[$tag] = $this->msg( $tag, $val );
782 $flashDecode = array(
783 'fired' => $val & bindec( '00000001' ),
784 'return' => ($val & bindec( '00000110' )) >> 1,
785 'mode' => ($val & bindec( '00011000' )) >> 3,
786 'function' => ($val & bindec( '00100000' )) >> 5,
787 'redeye' => ($val & bindec( '01000000' )) >> 6,
788 // 'reserved' => ($val & bindec( '10000000' )) >> 7,
791 # We do not need to handle unknown values since all are used.
792 foreach( $flashDecode as $subTag => $subValue ) {
793 # We do not need any message for zeroed values.
794 if( $subTag != 'fired' && $subValue == 0) {
797 $fullTag = $tag . '-' . $subTag ;
798 $flashMsgs[] = $this->msg( $fullTag, $subValue );
800 $tags[$tag] = $wgLang->commaList( $flashMsgs );
803 case 'FocalPlaneResolutionUnit':
806 $tags[$tag] = $this->msg( $tag, $val );
814 case 'SensingMethod':
816 case 1: case 2: case 3: case 4: case 5: case 7: case 8:
817 $tags[$tag] = $this->msg( $tag, $val );
828 $tags[$tag] = $this->msg( $tag, $val );
839 $tags[$tag] = $this->msg( $tag, $val );
847 case 'CustomRendered':
850 $tags[$tag] = $this->msg( $tag, $val );
860 case 0: case 1: case 2:
861 $tags[$tag] = $this->msg( $tag, $val );
872 $tags[$tag] = $this->msg( $tag, $val );
880 case 'SceneCaptureType':
882 case 0: case 1: case 2: case 3:
883 $tags[$tag] = $this->msg( $tag, $val );
893 case 0: case 1: case 2: case 3: case 4:
894 $tags[$tag] = $this->msg( $tag, $val );
904 case 0: case 1: case 2:
905 $tags[$tag] = $this->msg( $tag, $val );
915 case 0: case 1: case 2:
916 $tags[$tag] = $this->msg( $tag, $val );
926 case 0: case 1: case 2:
927 $tags[$tag] = $this->msg( $tag, $val );
935 case 'SubjectDistanceRange':
937 case 0: case 1: case 2: case 3:
938 $tags[$tag] = $this->msg( $tag, $val );
946 case 'GPSLatitudeRef':
947 case 'GPSDestLatitudeRef':
950 $tags[$tag] = $this->msg( 'GPSLatitude', $val );
958 case 'GPSLongitudeRef':
959 case 'GPSDestLongitudeRef':
962 $tags[$tag] = $this->msg( 'GPSLongitude', $val );
973 $tags[$tag] = $this->msg( $tag, $val );
981 case 'GPSMeasureMode':
984 $tags[$tag] = $this->msg( $tag, $val );
993 case 'GPSDestDistanceRef':
995 case 'K': case 'M': case 'N':
996 $tags[$tag] = $this->msg( 'GPSSpeed', $val );
1005 case 'GPSImgDirectionRef':
1006 case 'GPSDestBearingRef':
1009 $tags[$tag] = $this->msg( 'GPSDirection', $val );
1017 case 'GPSDateStamp':
1018 $tags[$tag] = $wgLang->date( substr( $val, 0, 4 ) . substr( $val, 5, 2 ) . substr( $val, 8, 2 ) . '000000' );
1021 // This is not in the Exif standard, just a special
1022 // case for our purposes which enables wikis to wikify
1023 // the make, model and software name to link to their articles.
1027 $tags[$tag] = $this->msg( $tag, '', $val );
1030 case 'ExposureTime':
1031 // Show the pretty fraction as well as decimal version
1032 $tags[$tag] = wfMsg( 'exif-exposuretime-format',
1033 $this->formatFraction( $val ), $this->formatNum( $val ) );
1037 $tags[$tag] = wfMsg( 'exif-fnumber-format',
1038 $this->formatNum( $val ) );
1042 $tags[$tag] = wfMsg( 'exif-focallength-format',
1043 $this->formatNum( $val ) );
1046 // Do not transform fields with pure text.
1047 // For some languages the formatNum() conversion results to wrong output like
1048 // foo,bar@example,com or foo٫bar@example٫com
1049 case 'ImageDescription':
1052 $tags[$tag] = htmlspecialchars( $val );
1055 $tags[$tag] = $this->formatNum( $val );
1064 * Convenience function for getFormattedData()
1068 * @param $tag String: the tag name to pass on
1069 * @param $val String: the value of the tag
1070 * @param $arg String: an argument to pass ($1)
1071 * @return string A wfMsg of "exif-$tag-$val" in lower case
1073 function msg( $tag, $val, $arg = null ) {
1078 return wfMsg( $wgContLang->lc( "exif-$tag-$val" ), $arg );
1082 * Format a number, convert numbers from fractions into floating point
1087 * @param $num Mixed: the value to format
1088 * @return mixed A floating point number or whatever we were fed
1090 function formatNum( $num ) {
1094 if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) )
1095 return $wgLang->formatNum( $m[2] != 0 ? $m[1] / $m[2] : $num );
1097 return $wgLang->formatNum( $num );
1101 * Format a rational number, reducing fractions
1105 * @param $num Mixed: the value to format
1106 * @return mixed A floating point number or whatever we were fed
1108 function formatFraction( $num ) {
1110 if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) ) {
1111 $numerator = intval( $m[1] );
1112 $denominator = intval( $m[2] );
1113 $gcd = $this->gcd( $numerator, $denominator );
1115 // 0 shouldn't happen! ;)
1116 return $this->formatNum( $numerator / $gcd ) . '/' . $this->formatNum( $denominator / $gcd );
1119 return $this->formatNum( $num );
1123 * Calculate the greatest common divisor of two integers.
1125 * @param $a Integer: FIXME
1126 * @param $b Integer: FIXME
1130 function gcd( $a, $b ) {
1132 // http://en.wikipedia.org/wiki/Euclidean_algorithm
1133 // Recursive form would be:
1137 return gcd( $b, $a % $b );
1140 $remainder = $a % $b;
1142 // tail recursion...
1151 * MW 1.6 compatibility
1153 define( 'MW_EXIF_BYTE', Exif::BYTE );
1154 define( 'MW_EXIF_ASCII', Exif::ASCII );
1155 define( 'MW_EXIF_SHORT', Exif::SHORT );
1156 define( 'MW_EXIF_LONG', Exif::LONG );
1157 define( 'MW_EXIF_RATIONAL', Exif::RATIONAL );
1158 define( 'MW_EXIF_UNDEFINED', Exif::UNDEFINED );
1159 define( 'MW_EXIF_SLONG', Exif::SLONG );
1160 define( 'MW_EXIF_SRATIONAL', Exif::SRATIONAL );