<?php
-if (defined('MEDIAWIKI')) {
+if ( !defined( 'MEDIAWIKI' ) ) die();
/**
* @package MediaWiki
* @subpackage Metadata
/**#@+
* Exif tag type definition
*/
-define('MW_EXIF_BYTE', 1); # An 8-bit unsigned integer.
+define('MW_EXIF_BYTE', 1); # An 8-bit (1-byte) unsigned integer.
define('MW_EXIF_ASCII', 2); # An 8-bit byte containing one 7-bit ASCII code. The final byte is terminated with NULL.
define('MW_EXIF_SHORT', 3); # A 16-bit (2-byte) unsigned integer.
define('MW_EXIF_LONG', 4); # A 32-bit (4-byte) unsigned integer.
class Exif {
/**#@+
* @var array
+ * @access private
*/
-
+
/**
* Exif tags grouped by category, the tagname itself is the key and the type
* is the value, in the case of more than one possible value type they are
* seperated by commas.
- *
- * @access private
*/
- var $mExif;
-
+ var $mExifTags;
+
/**
* A one dimentional array of all Exif tags
*/
- var $mFlatExif;
+ var $mFlatExifTags;
+
+ /**
+ * The raw Exif data returned by exif_read_data()
+ */
+ var $mRawExifData;
+
+ /**
+ * A Filtered version of $mRawExifData that has been pruned of invalid
+ * tags and tags that contain content they shouldn't contain according
+ * to the Exif specification
+ */
+ var $mFilteredExifData;
+
+ /**
+ * Filtered and formatted Exif data, see FormatExif::getFormattedData()
+ */
+ var $mFormattedExifData;
+
+ /**#@-*/
+
+ /**#@+
+ * @var string
+ * @access private
+ */
/**
- * A one dimentional array of all Exif tags that we'd want to save in
- * the database or present on a page.
+ * The file being processed
*/
- var $mValidExif;
+ var $file;
+ /**
+ * The basename of the file being processed
+ */
+ var $basename;
+
+ /**
+ * The private log to log to
+ */
+ var $log = 'exif';
+
/**#@-*/
/**
* Constructor
+ *
+ * @param string $file
*/
- function Exif() {
+ function Exif( $file ) {
/**
* Page numbers here refer to pages in the EXIF 2.2 standard
*
* @link http://exif.org/Exif2-2.PDF The Exif 2.2 specification
*/
- $this->mExif = array(
+ $this->mExifTags = array(
# TIFF Rev. 6.0 Attribute Information (p22)
'tiff' => array(
# Tags relating to image structure
'structure' => array(
'ImageWidth' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Image width
'ImageLength' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Image height
- 'BitsPerSample' => MW_EXIF_SHORT, # Number of bits per component
+ 'BitsPerSample' => MW_EXIF_SHORT, # Number of bits per component
# "When a primary image is JPEG compressed, this designation is not"
# "necessary and is omitted." (p23)
- 'Compression' => MW_EXIF_SHORT, # Compression scheme #p23
- 'PhotometricInterpretation' => MW_EXIF_SHORT, # Pixel composition #p23
- 'Orientation' => MW_EXIF_SHORT, # Orientation of image #p24
- 'SamplesPerPixel' => MW_EXIF_SHORT, # Number of components
- 'PlanarConfiguration' => MW_EXIF_SHORT, # Image data arrangement #p24
- 'YCbCrSubSampling' => MW_EXIF_SHORT, # Subsampling ratio of Y to C #p24
- 'YCbCrPositioning' => MW_EXIF_SHORT, # Y and C positioning #p24-25
- 'XResolution' => MW_EXIF_RATIONAL, # Image resolution in width direction
- 'YResolution' => MW_EXIF_RATIONAL, # Image resolution in height direction
- 'ResolutionUnit' => MW_EXIF_SHORT, # Unit of X and Y resolution #(p26)
+ 'Compression' => MW_EXIF_SHORT, # Compression scheme #p23
+ 'PhotometricInterpretation' => MW_EXIF_SHORT, # Pixel composition #p23
+ 'Orientation' => MW_EXIF_SHORT, # Orientation of image #p24
+ 'SamplesPerPixel' => MW_EXIF_SHORT, # Number of components
+ 'PlanarConfiguration' => MW_EXIF_SHORT, # Image data arrangement #p24
+ 'YCbCrSubSampling' => MW_EXIF_SHORT, # Subsampling ratio of Y to C #p24
+ 'YCbCrPositioning' => MW_EXIF_SHORT, # Y and C positioning #p24-25
+ 'XResolution' => MW_EXIF_RATIONAL, # Image resolution in width direction
+ 'YResolution' => MW_EXIF_RATIONAL, # Image resolution in height direction
+ 'ResolutionUnit' => MW_EXIF_SHORT, # Unit of X and Y resolution #(p26)
),
# Tags relating to recording offset
'configuration' => array(
'ComponentsConfiguration' => MW_EXIF_UNDEFINED, # Meaning of each component #p33
'CompressedBitsPerPixel' => MW_EXIF_RATIONAL, # Image compression mode
- 'PixelYDimension' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Valid image width
- 'PixelXDimension' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Valind image height
+ 'PixelYDimension' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Valid image width
+ 'PixelXDimension' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Valind image height
),
# Tags relating to related user information
'SpatialFrequencyResponse' => MW_EXIF_UNDEFINED, # Spatial frequency response
'FocalPlaneXResolution' => MW_EXIF_RATIONAL, # Focal plane X resolution
'FocalPlaneYResolution' => MW_EXIF_RATIONAL, # Focal plane Y resolution
- 'FocalPlaneResolutionUnit' => MW_EXIF_SHORT, # Focal plane resolution unit
+ 'FocalPlaneResolutionUnit' => MW_EXIF_SHORT, # Focal plane resolution unit #p46
'SubjectLocation' => MW_EXIF_SHORT, # Subject location
'ExposureIndex' => MW_EXIF_RATIONAL, # Exposure index
'SensingMethod' => MW_EXIF_SHORT, # Sensing method #p46
),
);
+ $this->file = $file;
+ $this->basename = basename( $this->file );
+
$this->makeFlatExifTags();
- $this->makeValidExifTags();
+
+ $this->debugFile( $this->basename, __FUNCTION__, true );
+ wfSuppressWarnings();
+ $data = exif_read_data( $this->file );
+ wfRestoreWarnings();
+ /**
+ * exif_read_data() will return false on invalid input, such as
+ * when somebody uploads a file called something.jpeg
+ * containing random gibberish.
+ */
+ $this->mRawExifData = $data ? $data : array();
+
+ $this->makeFilteredData();
+ $this->makeFormattedData();
+
+ $this->debugFile( __FUNCTION__, false );
}
-
- /**
- * Get the raw list of exiftags
- *
+
+ /**#@+
* @access private
- * @return array
- */
- function getExif() {
- return $this->mExif;
- }
-
+ */
/**
* Generate a flat list of the exif tags
*/
function makeFlatExifTags() {
- $exif = $this->getExif();
- $this->extractTags( $exif );
+ $this->extractTags( $this->mExifTags );
}
/**
* Note: This used to use an array_walk function, but it made PHP5
* segfault, see `cvs diff -u -r 1.4 -r 1.5 Exif.php`
*/
- function extractTags( $tagset ) {
+ function extractTags( &$tagset ) {
foreach( $tagset as $key => $val ) {
if( is_array( $val ) ) {
$this->extractTags( $val );
} else {
- $this->mFlatExif[$key] = $val;
+ $this->mFlatExifTags[$key] = $val;
}
}
}
/**
- * Produce a list of all Exif tags appropriate for user output
- *
- * Produce a list of all tags that we want to show in output, in order not to
- * output binary gibberish such as raw thumbnails we strip all tags
- * with the datatype of UNDEFINED.
- *
- * @todo We might actually want to display some of the UNDEFINED
- * stuff, but we strip it for now.
+ * Make $this->mFilteredExifData
*/
- function makeValidExifTags() {
- foreach( $this->mFlatExif as $key => $val ) {
- if( strpos( $val, (string)MW_EXIF_UNDEFINED ) !== false ) {
- continue;
+ function makeFilteredData() {
+ $this->mFilteredExifData = $this->mRawExifData;
+
+ foreach( $this->mFilteredExifData as $k => $v ) {
+ if ( !in_array( $k, array_keys( $this->mFlatExifTags ) ) ) {
+ $this->debug( $v, __FUNCTION__, "'$k' is not a valid Exif tag" );
+ unset( $this->mFilteredExifData[$k] );
+ }
+ }
+
+ foreach( $this->mFilteredExifData as $k => $v ) {
+ if ( !$this->validate($k, $v) ) {
+ $this->debug( $v, __FUNCTION__, "'$k' contained invalid data" );
+ unset( $this->mFilteredExifData[$k] );
}
- $this->mValidExif[] = $key;
}
}
- /**
- * The version of the output format
- *
- * Before the actual metadata information is saved in the database we
- * strip some of it since we don't want to save things like thumbnails
- * which usually accompany Exif data. This value gets saved in the
- * database along with the actual Exif data, and if the version in the
- * database doesn't equal the value returned by this function the Exif
- * data is regenerated.
- *
- * @return int
- */
+ function makeFormattedData( $data = null ) {
+ $format = new FormatExif( $this->getFilteredData() );
+ $this->mFormattedExifData = $format->getFormattedData();
+ }
+ /**#@-*/
+
+ /**#@+
+ * @return array
+ */
+ /**
+ * Get $this->mRawExifData
+ */
+ function getData() {
+ return $this->mRawExifData;
+ }
+
+ /**
+ * Get $this->mFilteredExifData
+ */
+ function getFilteredData() {
+ return $this->mFilteredExifData;
+ }
+
+ /**
+ * Get $this->mFormattedExifData
+ */
+ function getFormattedData() {
+ return $this->mFormattedExifData;
+ }
+ /**#@-*/
+
+ /**
+ * The version of the output format
+ *
+ * Before the actual metadata information is saved in the database we
+ * strip some of it since we don't want to save things like thumbnails
+ * which usually accompany Exif data. This value gets saved in the
+ * database along with the actual Exif data, and if the version in the
+ * database doesn't equal the value returned by this function the Exif
+ * data is regenerated.
+ *
+ * @return int
+ */
function version() {
return 1; // We don't need no bloddy constants!
}
/**#@+
* Validates if a tag value is of the type it should be according to the Exif spec
- *
+ *
+ * @access private
+ *
* @param mixed $in The input value to check
* @return bool
*/
function isByte( $in ) {
- wfDebug("Exif::isByte: input was '$in'\n");
- return is_numeric( $in ) && $in >= 0 && $in <= 255;
+ if ( sprintf('%d', $in) == $in && $in >= 0 && $in <= 255 ) {
+ $this->debug( $in, __FUNCTION__, true );
+ return true;
+ } else {
+ $this->debug( $in, __FUNCTION__, false );
+ return false;
+ }
}
function isASCII( $in ) {
- wfDebug("Exif::isASCII: input was '$in'\n");
- return true; // TODO: FIXME
+ if ( preg_match( "/[^\x0a\x20-\x7e]/", $in ) ) {
+ $this->debug( $in, __FUNCTION__, 'found a character not in our whitelist' );
+ return false;
+ }
+
+ if ( preg_match( "/^\s*$/", $in ) ) {
+ $this->debug( $in, __FUNCTION__, 'input consisted solely of whitespace' );
+ return false;
+ }
+
+ return true;
}
function isShort( $in ) {
- wfDebug("Exif::isShort: input was '$in'\n");
- return is_numeric( $in ) && $in >= 0 && $in <= 65536;
+ if ( sprintf('%d', $in) == $in && $in >= 0 && $in <= 65536 ) {
+ $this->debug( $in, __FUNCTION__, true );
+ return true;
+ } else {
+ $this->debug( $in, __FUNCTION__, false );
+ return false;
+ }
}
function isLong( $in ) {
- wfDebug("Exif::isLong: input was '$in'\n");
- return is_numeric( $in ) && $in >= 0 && $in <= 4294967296;
+ if ( sprintf('%d', $in) == $in && $in >= 0 && $in <= 4294967296 ) {
+ $this->debug( $in, __FUNCTION__, true );
+ return true;
+ } else {
+ $this->debug( $in, __FUNCTION__, false );
+ return false;
+ }
}
function isRational( $in ) {
- wfDebug("Exif::isRational: input was '$in'\n");
- $in = explode( '/', $in, 2 );
- return $this->isLong( $in[0] ) && $this->isLong( $in[1] );
+ if ( @preg_match( "/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/", $in, $m ) ) { # Avoid division by zero
+ return $this->isLong( $m[1] ) && $this->isLong( $m[2] );
+ } else {
+ $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
+ return false;
+ }
}
function isUndefined( $in ) {
- wfDebug("Exif::isUndefined: input was '$in'\n");
- return true;
+ if ( preg_match( "/^\d{4}$/", $in ) ) { // Allow ExifVersion and FlashpixVersion
+ $this->debug( $in, __FUNCTION__, true );
+ return true;
+ } else {
+ $this->debug( $in, __FUNCTION__, false );
+ return false;
+ }
}
function isSlong( $in ) {
- wfDebug("Exif::isSlong: input was '$in'\n");
- return $this->isLong( abs( $in ) );
+ if ( $this->isLong( abs( $in ) ) ) {
+ $this->debug( $in, __FUNCTION__, true );
+ return true;
+ } else {
+ $this->debug( $in, __FUNCTION__, false );
+ return false;
+ }
}
function isSrational( $in ) {
- wfDebug("Exif::isSrational: input was '$in'\n");
- $in = explode( '/', $in, 2 );
- return $this->isSlong( $in[0] ) && $this->isSlong( $in[1] );
+ if ( preg_match( "/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/", $in, $m ) ) { # Avoid division by zero
+ return $this->isSlong( $m[0] ) && $this->isSlong( $m[1] );
+ } else {
+ $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
+ return false;
+ }
}
/**#@-*/
/**
- * Validates if a tag has a legal value according to the Exif spec, presumes
- * that the given tag is valid ( has been checked in advance with
- * $this->mValidExif )
+ * Validates if a tag has a legal value according to the Exif spec
+ *
+ * @access private
*
* @param string $tag The tag to check
* @param mixed $val The value of the tag
* @return bool
*/
function validate( $tag, $val ) {
+ $debug = "tag is '$tag'";
// Fucks up if not typecast
- switch( (string)$this->mFlatExif[$tag] ) {
+ switch( (string)$this->mFlatExifTags[$tag] ) {
case (string)MW_EXIF_BYTE:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isByte( $val );
case (string)MW_EXIF_ASCII:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isASCII( $val );
case (string)MW_EXIF_SHORT:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isShort( $val );
case (string)MW_EXIF_LONG:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isLong( $val );
case (string)MW_EXIF_RATIONAL:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isRational( $val );
case (string)MW_EXIF_UNDEFINED:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isUndefined( $val );
case (string)MW_EXIF_SLONG:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isSlong( $val );
case (string)MW_EXIF_SRATIONAL:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isSrational( $val );
case (string)MW_EXIF_SHORT.','.MW_EXIF_LONG:
+ $this->debug( $val, __FUNCTION__, $debug );
return $this->isShort( $val ) || $this->isLong( $val );
default:
- wfDebug( "Exif::validate: The tag \"$tag\" had an invalid value: \"$val\"\n" );
+ $this->debug( $val, __FUNCTION__, "The tag '$tag' is unknown" );
return false;
}
}
+ /**
+ * Conviniance function for debugging output
+ *
+ * @access private
+ *
+ * @param mixed $in
+ * @param string $fname
+ * @param mixed $action
+ */
+ function debug( $in, $fname, $action = null ) {
+ $type = gettype( $in );
+ $class = ucfirst( __CLASS__ );
+ if ( $type === 'array' )
+ $in = print_r( $in, true );
+
+ if ( $action === true )
+ wfDebugLog( $this->log, "$class::$fname: accepted: '$in' (type: $type)\n");
+ elseif ( $action === false )
+ wfDebugLog( $this->log, "$class::$fname: rejected: '$in' (type: $type)\n");
+ elseif ( $action === null )
+ wfDebugLog( $this->log, "$class::$fname: input was: '$in' (type: $type)\n");
+ else
+ wfDebugLog( $this->log, "$class::$fname: $action (type: $type; content: '$in')\n");
+ }
+
+ /**
+ * Conviniance function for debugging output
+ *
+ * @access private
+ *
+ * @param string $basename The name of the file being processed
+ * @paran string $fname The name of the function calling this function
+ * @param bool $bool $io Specify whether we're beginning or ending
+ */
+ function debugFile( $fname, $io ) {
+ $class = ucfirst( __CLASS__ );
+ if ( $io )
+ wfDebugLog( $this->log, "$class::$fname: begin processing: '{$this->basename}'\n" );
+ else
+ wfDebugLog( $this->log, "$class::$fname: end processing: '{$this->basename}'\n" );
+ }
+
+}
+
+/**
+ * @package MediaWiki
+ * @subpackage Metadata
+ */
+class FormatExif {
+ /**
+ * The Exif data to format
+ *
+ * @var array
+ * @access private
+ */
+ var $mExif;
+
+ /**
+ * Constructor
+ *
+ * @param array $exif The Exif data to format ( as returned by
+ * Exif::getFilteredData() )
+ */
+ function FormatExif( $exif ) {
+ $this->mExif = $exif;
+ }
+
/**
* Numbers given by Exif user agents are often magical, that is they
* should be replaced by a detailed explanation depending on their
* value which most of the time are plain integers. This function
* formats Exif values into human readable form.
*
- * @param string $tag The tag to be formatted
- * @param mixed $val The value of the tag
- * @return string
+ * @return array
*/
- function format( $tag, $val ) {
+ function getFormattedData() {
global $wgLang;
- switch( $tag ) {
- case 'Compression':
- switch( $val ) {
- case 1: case 6:
- return $this->msg( $tag, $val );
- }
- break;
+ $tags =& $this->mExif;
- case 'PhotometricInterpretation':
- switch( $val ) {
- case 2: case 6:
- return $this->msg( $tag, $val );
- }
- break;
+ $resolutionunit = !isset( $tags['ResolutionUnit'] ) || $tags['ResolutionUnit'] == 2 ? 2 : 3;
+ unset( $tags['ResolutionUnit'] );
- case 'Orientation':
- switch( $val ) {
- case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'PlanarConfiguration':
- switch( $val ) {
- case 1: case 2:
- return $this->msg( $tag, $val );
- }
- break;
-
- // TODO: YCbCrSubSampling
- // TODO: YCbCrPositioning
- // TODO: If this field does not exists use 2
- case 'ResolutionUnit': #p26
- switch( $val ) {
- case 2: case 3:
- return $this->msg( $tag, $val );
- }
- break;
-
- // TODO: YCbCrCoefficients #p27 (see annex E)
- case 'ExifVersion': case 'FlashpixVersion':
- return "$val"/100;
-
- case 'ColorSpace':
- switch( $val ) {
- case 1: case 'FFFF.H':
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'ComponentsConfiguration':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'DateTime':
- case 'DateTimeOriginal':
- case 'DateTimeDigitized':
- return $wgLang->timeanddate( wfTimestamp(TS_MW, $val) );
-
- case 'ExposureProgram':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'MeteringMode':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 255:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'LightSource':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 9: case 10: case 11:
- case 12: case 13: case 14: case 15: case 17: case 18: case 19: case 20:
- case 21: case 22: case 23: case 24: case 255:
- return $this->msg( $tag, $val );
- }
- break;
-
- // TODO: Flash
- case 'SensingMethod':
- switch( $val ) {
- case 1: case 2: case 3: case 4: case 5: case 7: case 8:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'FileSource':
- switch( $val ) {
- case 3:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'SceneType':
- switch( $val ) {
- case 1:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'CustomRendered':
- switch( $val ) {
- case 0: case 1:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'ExposureMode':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'WhiteBalance':
- switch( $val ) {
- case 0: case 1:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'SceneCaptureType':
- switch( $val ) {
- case 0: case 1: case 2: case 3:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'GainControl':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'Contrast':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- }
- break;
-
- case 'Saturation':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- }
- break;
+ foreach( $tags as $tag => $val ) {
+ switch( $tag ) {
+ case 'Compression':
+ switch( $val ) {
+ case 1: case 6:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'PhotometricInterpretation':
+ switch( $val ) {
+ case 2: case 6:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
- case 'Sharpness':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- }
- break;
+ case 'Orientation':
+ switch( $val ) {
+ case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
- case 'SubjectDistanceRange':
- switch( $val ) {
- case 0: case 1: case 2: case 3:
- return $this->msg( $tag, $val );
- }
- break;
+ case 'PlanarConfiguration':
+ switch( $val ) {
+ case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
- case 'GPSLatitudeRef':
- switch( $val ) {
- case 'N': case 'S':
- return $this->msg( $tag, $val );
- }
- break;
+ // TODO: YCbCrSubSampling
+ // TODO: YCbCrPositioning
- case 'GPSLongitudeRef':
- switch( $val ) {
- case 'E': case 'W':
- return $this->msg( $tag, $val );
- }
- break;
+ case 'XResolution':
+ case 'YResolution':
+ switch( $resolutionunit ) {
+ case 2:
+ $tags[$tag] = $this->msg( 'XYResolution', 'i', $this->formatNum( $val ) );
+ break;
+ case 3:
+ $this->msg( 'XYResolution', 'c', $this->formatNum( $val ) );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ // TODO: YCbCrCoefficients #p27 (see annex E)
+ case 'ExifVersion': case 'FlashpixVersion':
+ $tags[$tag] = "$val"/100;
+ break;
- case 'GPSStatus':
- switch( $val ) {
- case 'A': case 'V':
- return $this->msg( $tag, $val );
- }
- break;
+ case 'ColorSpace':
+ switch( $val ) {
+ case 1: case 'FFFF.H':
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
- case 'GPSMeasureMode':
- switch( $val ) {
- case 2: case 3:
- return $this->msg( $tag, $val );
- }
- break;
+ case 'ComponentsConfiguration':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
- case 'GPSSpeedRef':
- switch( $val ) {
- case 'K': case 'M': case 'N':
- return $this->msg( $tag, $val );
- }
- break;
+ case 'DateTime':
+ case 'DateTimeOriginal':
+ case 'DateTimeDigitized':
+ $tags[$tag] = $wgLang->timeanddate( wfTimestamp(TS_MW, $val) );
+ break;
- case 'GPSTrackRef':
- switch( $val ) {
- case 'T': case 'M':
- return $this->msg( $tag, $val );
- }
- break;
+ case 'ExposureProgram':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'SubjectDistance':
+ $tags[$tag] = $this->msg( $tag, '', $this->formatNum( $val ) );
+ break;
+
+ case 'MeteringMode':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 255:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'LightSource':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 9: case 10: case 11:
+ case 12: case 13: case 14: case 15: case 17: case 18: case 19: case 20:
+ case 21: case 22: case 23: case 24: case 255:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ // TODO: Flash
+ case 'FocalPlaneResolutionUnit':
+ switch( $val ) {
+ case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'SensingMethod':
+ switch( $val ) {
+ case 1: case 2: case 3: case 4: case 5: case 7: case 8:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'FileSource':
+ switch( $val ) {
+ case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'SceneType':
+ switch( $val ) {
+ case 1:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'CustomRendered':
+ switch( $val ) {
+ case 0: case 1:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'ExposureMode':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'WhiteBalance':
+ switch( $val ) {
+ case 0: case 1:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'SceneCaptureType':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GainControl':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'Contrast':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'Saturation':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'Sharpness':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'SubjectDistanceRange':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GPSLatitudeRef':
+ case 'GPSDestLatitudeRef':
+ switch( $val ) {
+ case 'N': case 'S':
+ $tags[$tag] = $this->msg( 'GPSLatitude', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GPSLongitudeRef':
+ case 'GPSDestLongitudeRef':
+ switch( $val ) {
+ case 'E': case 'W':
+ $tags[$tag] = $this->msg( 'GPSLongitude', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GPSStatus':
+ switch( $val ) {
+ case 'A': case 'V':
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GPSMeasureMode':
+ switch( $val ) {
+ case 2: case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GPSSpeedRef':
+ case 'GPSDestDistanceRef':
+ switch( $val ) {
+ case 'K': case 'M': case 'N':
+ $tags[$tag] = $this->msg( 'GPSSpeed', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GPSTrackRef':
+ case 'GPSImgDirectionRef':
+ case 'GPSDestBearingRef':
+ switch( $val ) {
+ case 'T': case 'M':
+ $tags[$tag] = $this->msg( 'GPSDirection', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+ break;
+
+ case 'GPSDateStamp':
+ $tags[$tag] = $wgLang->date( substr( $val, 0, 4 ) . substr( $val, 5, 2 ) . substr( $val, 8, 2 ) . '000000' );
+ break;
+
+ // This is not in the Exif standard, just a special
+ // case for our purposes which enables wikis to wikify
+ // the make, model and software name to link to their articles.
+ case 'Make':
+ case 'Model':
+ case 'Software':
+ $tags[$tag] = $this->msg( $tag, '', $val );
+ break;
- case 'GPSImgDirectionRef':
- switch( $val ) {
- case 'T': case 'M':
- return $this->msg( $tag, $val );
- }
- break;
+ case 'ExposureTime':
+ // Show the pretty fraction as well as decimal version
+ $tags[$tag] = wfMsg( 'exif-exposuretime-format',
+ $this->formatFraction( $val ), $this->formatNum( $val ) );
+ break;
- case 'GPSDestLatitudeRef':
- switch( $val ) {
- case 'N': case 'S':
- return $this->msg( $tag, $val );
- }
- break;
+ case 'FNumber':
+ $tags[$tag] = wfMsg( 'exif-fnumber-format',
+ $this->formatNum( $val ) );
+ break;
- case 'GPSDestLongitudeRef':
- switch( $val ) {
- case 'E': case 'W':
- return $this->msg( $tag, $val );
- }
- break;
+ case 'FocalLength':
+ $tags[$tag] = wfMsg( 'exif-focallength-format',
+ $this->formatNum( $val ) );
+ break;
- case 'GPSDestBearingRef':
- switch( $val ) {
- case 'T': case 'M':
- return $this->msg( $tag, $val );
+ default:
+ $tags[$tag] = $this->formatNum( $val );
+ break;
}
- break;
- case 'GPSDateStamp':
- return $wgLang->date( substr( $val, 0, 4 ) . substr( $val, 5, 2 ) . substr( $val, 8, 2 ) . '000000' );
-
- // This is not in the Exif standard, just a special
- // case for our purposes which enables wikis to wikify
- // the make, model and software name to link to their articles.
- case 'Make':
- case 'Model':
- case 'Software':
- return wfMsg( strtolower( "exif-$tag-value" ), $val );
- default:
- return $val;
}
+
+ return $tags;
}
/**
- * Conviniance function for format()
+ * Conviniance function for getFormattedData()
+ *
+ * @access private
*
* @param string $tag The tag name to pass on
* @param string $val The value of the tag
+ * @param string $arg An argument to pass ($1)
* @return string A wfMsg of "exif-$tag-$val" in lower case
*/
- function msg( $tag, $val ) {
- return wfMsg( strtolower("exif-$tag-$val") );
+ function msg( $tag, $val, $arg = null ) {
+ global $wgContLang;
+
+ if ($val === '')
+ $val = 'value';
+ return wfMsg( $wgContLang->lc( "exif-$tag-$val" ), $arg );
}
-}
-} // MEDIAWIKI
+ /**
+ * Format a number, convert numbers from fractions into floating point
+ * numbers
+ *
+ * @access private
+ *
+ * @param mixed $num The value to format
+ * @return mixed A floating point number or whatever we were fed
+ */
+ function formatNum( $num ) {
+ if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) )
+ return $m[2] != 0 ? $m[1] / $m[2] : $num;
+ else
+ return $num;
+ }
+
+ /**
+ * Format a rational number, reducing fractions
+ *
+ * @access private
+ *
+ * @param mixed $num The value to format
+ * @return mixed A floating point number or whatever we were fed
+ */
+ function formatFraction( $num ) {
+ if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) ) {
+ $numerator = intval( $m[1] );
+ $denominator = intval( $m[2] );
+ $gcd = $this->gcd( $numerator, $denominator );
+ if( $gcd != 0 ) {
+ // 0 shouldn't happen! ;)
+ return $numerator / $gcd . '/' . $denominator / $gcd;
+ }
+ }
+ return $this->formatNum( $num );
+ }
+
+ /**
+ * Calculate the greatest common divisor of two integers.
+ *
+ * @param int $a
+ * @param int $b
+ * @return int
+ * @access private
+ */
+ function gcd( $a, $b ) {
+ /*
+ // http://en.wikipedia.org/wiki/Euclidean_algorithm
+ // Recursive form would be:
+ if( $b == 0 )
+ return $a;
+ else
+ return gcd( $b, $a % $b );
+ */
+ while( $b != 0 ) {
+ $remainder = $a % $b;
+
+ // tail recursion...
+ $a = $b;
+ $b = $remainder;
+ }
+ return $a;
+ }
+}
dépôts / lhc / web / wiklou.git / blobdiff