JPEG specific handler. More...

Inheritance diagram for JpegHandler:

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Collaboration diagram for JpegHandler:

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Public Member Functions

getSizeAndMetadata ( $state, $filename)

Get image size information and metadata array.

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

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

Stability: stable: to override

rotate ( $file, $params)

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

Stability: stable: to override

supportsBucketing ()

Returns whether or not this handler supports the chained generation of thumbnails according to buckets.

swapICCProfile ( $filepath, array $colorSpaces, array $oldProfileStrings, $profileFilepath)

Swaps an embedded ICC profile for another, if found.

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

Stability: stable: to override

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)

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.

mustRender ( $file)

Returns whether the file needs to be rendered.

Public Member Functions inherited from ImageHandler

canRender ( $file)

True if the handled types can be transformed.

Stability: stable: to override

Parameters

File $file

Returns: bool

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

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.

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

Get the thumbnail extension and MIME type for a given source MIME type.

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.

isExpensiveToThumbnail ( $file)

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

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.

useSplitMetadata ()

If this returns true, LocalFile may split metadata up and store its constituent items separately.

verifyUpload ( $fileName)

File validation hook called on upload.

Protected Member Functions

getScriptParams ( $params)

Stability: stable: to override

transformImageMagick ( $image, $params)

Transform an image using ImageMagick.

Stability: stable: to override

Parameters

File	$image	File associated with this thumbnail
array	$params	Array with scaler params

Returns: MediaTransformError|false Error object if error occurred, false (=no error) otherwise

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.

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 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 Private Member Functions
static	validateQuality ( $value)
	Validate and normalize quality value to be between 1 and 100 (inclusive).

Private Attributes
const	SRGB_EXIF_COLOR_SPACE = 'sRGB'

const	SRGB_ICC_PROFILE_DESCRIPTION = 'sRGB IEC61966-2.1'

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

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

JPEG specific handler.

Inherits most stuff from BitmapHandler, just here to do the metadata handler differently.

Metadata stuff common to Jpeg and built-in Tiff (not PagedTiffHandler) is in ExifBitmapHandler.

Definition at line 35 of file JpegHandler.php.

Member Function Documentation

◆ getScriptParams()

JpegHandler::getScriptParams ( $params )

protected

Stability: stable: to override

Stability: stable: to override

Reimplemented from ImageHandler.

Definition at line 95 of file JpegHandler.php.

References $res.

◆ getSizeAndMetadata()

JpegHandler::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 103 of file JpegHandler.php.

References ExifBitmapHandler\applyExifRotation(), ExifBitmapHandler\BROKEN_FILE, BitmapMetadataHandler\Jpeg(), Exif\version(), and wfDebug().

◆ makeParamString()

JpegHandler::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

Stability: stable: to override

Stability: stable: to override

Reimplemented from BitmapHandler.

Definition at line 65 of file JpegHandler.php.

References $res.

◆ normaliseParams()

JpegHandler::normaliseParams	(		$image,
		&	$params
	)

Stability: stable: to override

Parameters

File	$image
array	&$params

Returns: bool

Reimplemented from BitmapHandler.

Definition at line 39 of file JpegHandler.php.

◆ parseParamString()

JpegHandler::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

Stability: stable: to override

Stability: stable: to override

Reimplemented from BitmapHandler.

Definition at line 74 of file JpegHandler.php.

References $res.

◆ rotate()

JpegHandler::rotate	(	$file,
		$params
	)

Parameters

File	$file
array	$params	Rotate parameters. 'rotation' clockwise rotation in degrees, allowed are multiples of 90

Since: 1.21

Returns: bool|MediaTransformError

Reimplemented from BitmapHandler.

Definition at line 143 of file JpegHandler.php.

References $command, $file, $wgJpegTran, ExifBitmapHandler\getRotation(), and MediaHandler\logErrorForExternalProcess().

◆ sanitizeParamsForBucketing()

JpegHandler::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

Stability: stable: to override

Stability: stable: to override

Reimplemented from ImageHandler.

Definition at line 178 of file JpegHandler.php.

◆ supportsBucketing()

JpegHandler::supportsBucketing ( )

Returns whether or not this handler supports the chained generation of thumbnails according to buckets.

Stability: stable: to override

Returns: bool

Since: 1.24

Reimplemented from MediaHandler.

Definition at line 174 of file JpegHandler.php.

◆ swapICCProfile()

JpegHandler::swapICCProfile	(		$filepath,
		array	$colorSpaces,
		array	$oldProfileStrings,
			$profileFilepath
	)

Swaps an embedded ICC profile for another, if found.

Depends on exiftool, no-op if not installed.

Parameters

string	$filepath	File to be manipulated (will be overwritten)
array	$colorSpaces	Only process files with this/these Color Space(s)
array	$oldProfileStrings	Exact name(s) of color profile to look for (the one that will be replaced)
string	$profileFilepath	ICC profile file to apply to the file

Since: 1.26

Returns: bool

Definition at line 244 of file JpegHandler.php.

References $command, $wgExiftool, and MediaHandler\logErrorForExternalProcess().

Referenced by transformImageMagick().

◆ transformImageMagick()

JpegHandler::transformImageMagick	(	$image,
		$params
	)

protected

Transform an image using ImageMagick.

Stability: stable: to override

Parameters

File	$image	File associated with this thumbnail
array	$params	Array with scaler params

Returns: MediaTransformError|false Error object if error occurred, false (=no error) otherwise

Reimplemented from BitmapHandler.

Definition at line 190 of file JpegHandler.php.

References $wgUseTinyRGBForJPGThumbnails, SRGB_EXIF_COLOR_SPACE, SRGB_ICC_PROFILE_DESCRIPTION, and swapICCProfile().

◆ validateParam()

JpegHandler::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

Stability: stable: to override

Stability: stable: to override

Reimplemented from BitmapHandler.

Definition at line 49 of file JpegHandler.php.

References validateQuality().

◆ validateQuality()

static JpegHandler::validateQuality ( $value )

staticprivate

Validate and normalize quality value to be between 1 and 100 (inclusive).

Parameters

int $value Quality value, will be converted to integer or 0 if invalid

Returns: bool True if the value is valid

Definition at line 61 of file JpegHandler.php.

Referenced by validateParam().

Member Data Documentation

◆ SRGB_EXIF_COLOR_SPACE

const JpegHandler::SRGB_EXIF_COLOR_SPACE = 'sRGB'

private

Definition at line 36 of file JpegHandler.php.

Referenced by transformImageMagick().

◆ SRGB_ICC_PROFILE_DESCRIPTION

const JpegHandler::SRGB_ICC_PROFILE_DESCRIPTION = 'sRGB IEC61966-2.1'

private

Definition at line 37 of file JpegHandler.php.

Referenced by transformImageMagick().

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

includes/media/JpegHandler.php

Public Member Functions

Protected Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ getScriptParams()

◆ getSizeAndMetadata()

◆ makeParamString()

◆ normaliseParams()

◆ parseParamString()

◆ rotate()

◆ sanitizeParamsForBucketing()

◆ supportsBucketing()

◆ swapICCProfile()

◆ transformImageMagick()

◆ validateParam()

◆ validateQuality()

Member Data Documentation

◆ SRGB_EXIF_COLOR_SPACE

◆ SRGB_ICC_PROFILE_DESCRIPTION