TiffHandler Class Reference

Handler for Tiff images. More...

Inheritance diagram for TiffHandler:

Collaboration diagram for TiffHandler:

Public Member Functions
	canRender ( $file)
	Conversion to PNG for inline display can be disabled here... Note scaling should work with ImageMagick, but may not with GD scaling.
	getSizeAndMetadata ( $state, $filename)
	Get image size information and metadata array.
	getThumbType ( $ext, $mime, $params=null)
	isExpensiveToThumbnail ( $file)
	True if creating thumbnails from the file is large or otherwise resource-intensive.
	mustRender ( $file)
	Browsers don't support TIFF inline generally... For inline display, we need to convert to PNG.
Public Member Functions inherited from ExifBitmapHandler
	convertMetadataVersion ( $metadata, $version=1)
	Convert metadata version.
	formatMetadata ( $image, $context=false)
	getCommonMetaArray (File $file)
	Get an array of standard (FormatMetadata type) metadata values.
	getMetadataType ( $image)
	Get a string describing the type of metadata, for display purposes.
	getRotation ( $file)
	On supporting image formats, try to read out the low-level orientation of the file and return the angle that the file needs to be rotated to be viewed.
	isFileMetadataValid ( $image)
Public Member Functions inherited from BitmapHandler
	autoRotateEnabled ()
	canRotate ()
	Returns whether the current scaler supports rotation (im and gd do)
	makeParamString ( $params)
	Merge a parameter array into a string appropriate for inclusion in filenames. Parameters array $params Array of parameters that have been through normaliseParams. Returns string Stability: stable to override
	normaliseParams ( $image, &$params)
	parseParamString ( $str)
	Parse a param string made with makeParamString back into an array. Parameters string $str The parameter string without file name (e.g. 122px) Returns array|bool Array of parameters or false on failure. Stability: stable to override
	rotate ( $file, $params)
	validateParam ( $name, $value)
	Validate a thumbnail parameter at parse time.Return true to accept the parameter, and false to reject it. If you return false, the parser will do something quiet and forgiving. Parameters string $name mixed $value Stability: stable to override
Public Member Functions inherited from TransformationalImageHandler
	doTransform ( $image, $dstPath, $dstUrl, $params, $flags=0)
	Create a thumbnail.
	extractPreRotationDimensions ( $params, $rotation)
	Extracts the width/height if the image will be scaled before rotating.
	getMediaTransformError ( $params, $errMsg)
	Get a MediaTransformError with error 'thumbnail_error'.
	isImageAreaOkForThumbnaling ( $file, &$params)
	Check if the file is smaller than the maximum image area for thumbnailing.
Public Member Functions inherited from ImageHandler
	getDimensionsString ( $file)
	Shown in file history box on image description page. Stability: stable to override Parameters File $file Returns string Dimensions
	getImageArea ( $image)
	Function that returns the number of pixels to be thumbnailed.
	getImageSize ( $image, $path)
	Get an image size array like that returned by getimagesize(), or false if it can't be determined.
	getLongDesc ( $file)
	Long description.Shown under image on image description page surounded by (). Stability: stable to override Parameters File $file Returns string
	getParamMap ()
	Get an associative array mapping magic word IDs to parameter names.Will be used by the parser to identify parameters.
	getScriptedTransform ( $image, $script, $params)
	Get a MediaTransformOutput object representing an alternate of the transformed output which will call an intermediary thumbnail assist script.Used when the repository has a thumbnailScriptUrl option configured.Return false to fall back to the regular getTransform(). Stability: stable to override Parameters File $image string $script array $params Returns bool|ThumbnailImage
	getShortDesc ( $file)
	Short description.Shown on Special:Search results. Stability: stable to override Parameters File $file Returns string
	sanitizeParamsForBucketing ( $params)
	Returns a normalised params array for which parameters have been cleaned up for bucketing purposes. Stability: stable to override Parameters array $params Returns array
Public Member Functions inherited from MediaHandler
	canAnimateThumbnail ( $file)
	If the material is animated, we can animate the thumbnail.
	filterThumbnailPurgeList (&$files, $options)
	Remove files from the purge list.
	getAvailableLanguages (File $file)
	Get list of languages file can be viewed in.
	getContentHeaders ( $metadata)
	Get useful response headers for GET/HEAD requests for a file with the given metadata.
	getDefaultRenderLanguage (File $file)
	On file types that support renderings in multiple languages, which language is used by default if unspecified.
	getEntireText (File $file)
	Get the text of the entire document.
	getLength ( $file)
	If its an audio file, return the length of the file.
	getMatchedLanguage ( $userPreferredLanguage, array $availableLanguages)
	When overridden in a descendant class, returns a language code most suiting.
	getMetadata ( $image, $path)
	Get handler-specific metadata which will be saved in the img_metadata field.
	getPageDimensions (File $image, $page)
	Get an associative array of page dimensions Currently "width" and "height" are understood, but this might be expanded in the future.
	getPageText (File $image, $page)
	Generic getter for text layer.
	getSizeAndMetadataWithFallback ( $file, $path)
	Get the metadata array and the image size, with b/c fallback.
	getTransform ( $image, $dstPath, $dstUrl, $params)
	Get a MediaTransformOutput object representing the transformed output.
	getWarningConfig ( $file)
	Gets configuration for the file warning message.
	isAnimatedImage ( $file)
	The material is an image, and is animated.
	isEnabled ()
	False if the handler is disabled for all files.
	isMetadataValid ( $image, $metadata)
	Check if the metadata string is valid for this handler.
	isMultiPage ( $file)
	True if the type has multi-page capabilities.
	isVectorized ( $file)
	The material is vectorized and thus scaling is lossless.
	pageCount (File $file)
	Page count for a multi-page document, false if unsupported or unknown.
	parserTransformHook ( $parser, $file)
	Modify the parser object post-transform.
	removeBadFile ( $dstPath, $retval=0)
	Check for zero-sized thumbnails.
	supportsBucketing ()
	Returns whether or not this handler supports the chained generation of thumbnails according to buckets.
	useSplitMetadata ()
	If this returns true, LocalFile may split metadata up and store its constituent items separately.
	verifyUpload ( $fileName)
	File validation hook called on upload.

Private Attributes
const	EXPENSIVE_SIZE_LIMIT = 10485760
	TIFF files over 10M are considered expensive to thumbnail.

Additional Inherited Members
Static Public Member Functions inherited from BitmapHandler
static	imageJpegWrapper ( $dst_image, $thumbPath, $quality=null)
	Callback for transformGd when transforming jpeg images.
Static Public Member Functions inherited from MediaHandler
static	fitBoxWidth ( $boxWidth, $boxHeight, $maxHeight)
	Calculate the largest thumbnail width for a given original file size such that the thumbnail's height is at most $maxHeight.
static	getGeneralLongDesc ( $file)
	Used instead of getLongDesc if there is no handler registered for file.
static	getGeneralShortDesc ( $file)
	Used instead of getShortDesc if there is no handler registered for file.
static	getHandler ( $type)
	Get a MediaHandler for a given MIME type from the instance cache.
static	getMetadataVersion ()
	Get metadata version.
static	getPageRangesByDimensions ( $pagesByDimensions)
	Converts a dimensions array about a potentially multipage document from an exhaustive list of ordered page numbers to a list of page ranges.
Public Attributes inherited from ExifBitmapHandler
const	BROKEN_FILE = '-1'
	Error extracting metadata.
const	OLD_BROKEN_FILE = '0'
	Outdated error extracting metadata.
Public Attributes inherited from MediaHandler
const	METADATA_BAD = false
const	METADATA_COMPATIBLE = 2
const	METADATA_GOOD = true
const	TRANSFORM_LATER = 1
Protected Member Functions inherited from ExifBitmapHandler
	applyExifRotation ( $info, $metadata)
	getRotationForExifFromOrientation ( $orientation)
	Given a chunk of serialized Exif metadata, return the orientation as degrees of rotation.
Protected Member Functions inherited from BitmapHandler
	getScalerType ( $dstPath, $checkDstPath=true)
	Returns which scaler type should be used.
	imageMagickSubsampling ( $pixelFormat)
	Get ImageMagick subsampling factors for the target JPEG pixel format.
	transformCustom ( $image, $params)
	Transform an image using a custom command.
	transformGd ( $image, $params)
	Transform an image using the built in GD library.
	transformImageMagick ( $image, $params)
	Transform an image using ImageMagick.
	transformImageMagickExt ( $image, $params)
	Transform an image using the Imagick PHP extension.
Protected Member Functions inherited from TransformationalImageHandler
	escapeMagickInput ( $path, $scene=false)
	Escape a string for ImageMagick's input filenames.
	escapeMagickOutput ( $path, $scene=false)
	Escape a string for ImageMagick's output filename.
	escapeMagickPath ( $path, $scene=false)
	Armour a string against ImageMagick's GetPathComponent().
	escapeMagickProperty ( $s)
	Escape a string for ImageMagick's property input (e.g.
	getClientScalingThumbnailImage ( $image, $scalerParams)
	Get a ThumbnailImage that respresents an image that will be scaled client side.
	getMagickVersion ()
	Retrieve the version of the installed ImageMagick You can use PHPs version_compare() to use this value Value is cached for one hour.
	getThumbnailSource ( $file, $params)
	Get the source file for the transform.
Protected Member Functions inherited from ImageHandler
	getScriptParams ( $params)
Protected Member Functions inherited from MediaHandler
	formatMetadataHelper ( $metadataArray, $context=false)
	sorts the visible/invisible field.
	formatTag (string $key, $vals, $context=false)
	Override default formatting for the given metadata field.
	hasMostDerivedMethod ( $name)
	Check whether a method is implemented in the most derived class.
	logErrorForExternalProcess ( $retval, $err, $cmd)
	Log an error that occurred in an external process.
	useLegacyMetadata ()
	If this returns true, the new method getSizeAndMetadata() will not be called.
	visibleMetadataFields ()
	Get a list of metadata items which should be displayed when the metadata table is collapsed.
Static Protected Member Functions inherited from MediaHandler
static	addMeta (&$array, $visibility, $type, $id, $value, $param=false)
	This is used to generate an array element for each metadata value That array is then used to generate the table of metadata values on the image page.

Detailed Description

Handler for Tiff images.

Definition at line 31 of file TiffHandler.php.

Member Function Documentation

canRender()

TiffHandler::canRender

(

$file

)

Conversion to PNG for inline display can be disabled here... Note scaling should work with ImageMagick, but may not with GD scaling.

Files pulled from an another MediaWiki instance via ForeignAPIRepo / InstantCommons will have thumbnails managed from the remote instance, so we can skip this check.

Parameters

File

$file

Returns

bool

Reimplemented from ImageHandler.

Definition at line 48 of file TiffHandler.php.

References $file, and $wgTiffThumbnailType.

getSizeAndMetadata()

TiffHandler::getSizeAndMetadata	(		$state,
			$path
	)

Get image size information and metadata array.

If this returns null, the caller will fall back to getImageSize() and getMetadata().

If getImageSize() or getMetadata() are implemented in the most derived class, they will be used instead of this function. To override this behaviour, override useLegacyMetadata().

Stability: stable

to override

Since

1.37

Parameters

MediaHandlerState	$state	An object for saving process-local state. This is normally a File object which will be passed back to other MediaHandler methods like pageCount(), if they are called in the same request. The handler can use this object to save its state.
string	$path	The filename

Returns

array|null Null to fall back to getImageSize(), or an array with the following keys. All keys are optional.

• width: The width. If multipage, return the first page width. (optional)
• height: The height. If multipage, return the first page height. (optional)
• bits: The number of bits for each color (optional)
• metadata: A JSON-serializable array of metadata (optional)

Reimplemented from ImageHandler.

Definition at line 78 of file TiffHandler.php.

References $wgShowEXIF, ExifBitmapHandler\applyExifRotation(), ExifBitmapHandler\BROKEN_FILE, BitmapMetadataHandler\Tiff(), Exif\version(), and wfDebug().

getThumbType()

TiffHandler::getThumbType	(		$ext,
			$mime,
			$params = null
	)

Parameters

string	$ext
string	$mime
array | null	$params

Returns

array

Reimplemented from MediaHandler.

Definition at line 72 of file TiffHandler.php.

References $wgTiffThumbnailType.

isExpensiveToThumbnail()

TiffHandler::isExpensiveToThumbnail

(

$file

)

True if creating thumbnails from the file is large or otherwise resource-intensive.

Stability: stable

to override

Parameters

File

$file

Returns

bool

Reimplemented from MediaHandler.

Definition at line 108 of file TiffHandler.php.

References $file.

mustRender()

TiffHandler::mustRender

(

$file

)

Browsers don't support TIFF inline generally... For inline display, we need to convert to PNG.

Parameters

File

$file

Returns

bool

Reimplemented from TransformationalImageHandler.

Definition at line 62 of file TiffHandler.php.

Member Data Documentation

EXPENSIVE_SIZE_LIMIT

const TiffHandler::EXPENSIVE_SIZE_LIMIT = 10485760

private

TIFF files over 10M are considered expensive to thumbnail.

Definition at line 35 of file TiffHandler.php.

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The documentation for this class was generated from the following file:

• includes/media/TiffHandler.php