Handler for Google's WebP format https://developers.google.com/speed/webp/ More...

Inheritance diagram for WebPHandler:

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Collaboration diagram for WebPHandler:

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Public Member Functions

canAnimateThumbnail ( $file)

If the material is animated, we can animate the thumbnail.

canRender ( $file)

getImageSize ( $file, $path, $metadata=false)

getMetadata ( $image, $filename)

Get handler-specific metadata which will be saved in the img_metadata field.

getMetadataType ( $image)

Get a string describing the type of metadata, for display purposes.

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

Render files as PNG.

isAnimatedImage ( $image)

isMetadataValid ( $image, $metadata)

Check if the metadata string is valid for this handler.

mustRender ( $file)

Public Member Functions inherited from BitmapHandler

autoRotateEnabled ()

canRotate ()

Returns whether the current scaler supports rotation (im and gd do) Stable to override.

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

Stable to override Stable to override

normaliseParams ( $image, &$params)

Stable to override.

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.

Stable to override Stable to override

rotate ( $file, $params)

Stable to override.

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

Stable to override 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.Stable to override

Parameters

File $file

Returns: string Dimensions

Stable to override

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.This function is used for determining the width, height and bitdepth directly from an image. The results are stored in the database in the img_width, img_height, img_bits fields.

Note: If this is a multipage file, return the width and height of the first page.

Parameters

File \| FSFile	$image	The image object, or false if there isn't one. Warning, FSFile::getPropsFromPath might pass an FSFile instead of File (!)
string	$path	The filename

Returns: array|false Follow the format of PHP getimagesize() internal function. See https://www.php.net/getimagesize. MediaWiki will only ever use the first two array keys (the width and height), and the 'bits' associative key. All other array keys are ignored. Returning a 'bits' key is optional as not all formats have a notion of "bitdepth". Returns false on failure.

Stable to override

getLongDesc ( $file)

Long description.Shown under image on image description page surounded by ().Stable to override

Parameters

File $file

Returns: string

Stable to override

getParamMap ()

Get an associative array mapping magic word IDs to parameter names.Will be used by the parser to identify parameters. Stable to override

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().Stable to override

Parameters

File	$image
string	$script
array	$params

Returns: bool|ThumbnailImage

Stable to override

getShortDesc ( $file)

Short description.Shown on Special:Search results.Stable to override

Parameters

File $file

Returns: string

Stable to override

sanitizeParamsForBucketing ( $params)

Returns a normalised params array for which parameters have been cleaned up for bucketing purposes Stable to override.

Parameters

array $params

Returns: array

Stable to override

Public Member Functions inherited from MediaHandler

convertMetadataVersion ( $metadata, $version=1)

Convert metadata version.

filterThumbnailPurgeList (&$files, $options)

Remove files from the purge list.

formatMetadata ( $image, $context=false)

Get an array structure that looks like this:

getAvailableLanguages (File $file)

Get list of languages file can be viewed in.

getCommonMetaArray (File $file)

Get an array of standard (FormatMetadata type) metadata values.

getContentHeaders ( $metadata)

Get useful response headers for GET/HEAD requests for a file with the given metadata Stable to override.

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.

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.

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.

getTransform ( $image, $dstPath, $dstUrl, $params)

Get a MediaTransformOutput object representing the transformed output.

getWarningConfig ( $file)

Gets configuration for the file warning message.

isEnabled ()

False if the handler is disabled for all files Stable to override.

isExpensiveToThumbnail ( $file)

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

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 Stable to override.

verifyUpload ( $fileName)

File validation hook called on upload.

Static Public Member Functions
static	decodeExtendedChunkHeader ( $header)
	Decodes an extended chunk header.

static	decodeLosslessChunkHeader ( $header)
	Decodes a lossless chunk header.

static	extractMetadata ( $filename)
	Extracts the image size and WebP type from a file.

static	extractMetadataFromChunks ( $chunks, $filename)
	Extracts the image size and WebP type from a file based on the chunk list.

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.

Protected Member Functions
	getScalerType ( $dstPath, $checkDstPath=true)
	Must use "im" for XCF.

Protected Member Functions inherited from BitmapHandler
	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 Stable to override.

	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)
	Stable to override

Protected Member Functions inherited from MediaHandler
	formatMetadataHelper ( $metadataArray, $context=false)
	sorts the visible/invisible field.

	logErrorForExternalProcess ( $retval, $err, $cmd)
	Log an error that occurred in an external process.

	visibleMetadataFields ()
	Get a list of metadata items which should be displayed when the metadata table is collapsed.

Static Protected Member Functions
static	decodeLossyChunkHeader ( $header)
	Decodes a lossy chunk header.

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.

Private Attributes
const	_MW_WEBP_VERSION = 1
	Version of the metadata stored in db records.

const	BROKEN_FILE = '0'
	Value to store in img_metadata if there was an error extracting metadata.

const	MINIMUM_CHUNK_HEADER_LENGTH = 18
	Minimum chunk header size to be able to read all header types.

const	VP8X_ALPHA = 16

const	VP8X_ANIM = 2

const	VP8X_EXIF = 8

const	VP8X_ICC = 32

const	VP8X_XMP = 4

Additional Inherited Members
Public Attributes inherited from MediaHandler
const	METADATA_BAD = false

const	METADATA_COMPATIBLE = 2

const	METADATA_GOOD = true

const	TRANSFORM_LATER = 1

Detailed Description

Handler for Google's WebP format https://developers.google.com/speed/webp/

Definition at line 29 of file WebPHandler.php.

Member Function Documentation

◆ canAnimateThumbnail()

WebPHandler::canAnimateThumbnail ( $file )

If the material is animated, we can animate the thumbnail.

Since: 1.20

Stable to override

Parameters

File $file

Returns: bool If material is not animated, handler may return any value.

Reimplemented from MediaHandler.

Definition at line 286 of file WebPHandler.php.

◆ canRender()

WebPHandler::canRender ( $file )

Parameters

File $file

Returns: bool False if we are unable to render this image

Reimplemented from ImageHandler.

Definition at line 263 of file WebPHandler.php.

References $file.

◆ decodeExtendedChunkHeader()

static WebPHandler::decodeExtendedChunkHeader ( $header )

static

Decodes an extended chunk header.

Parameters

string $header First few bytes of the header, expected to be at least 18 bytes long

Returns: bool|array See WebPHandler::decodeHeader

Definition at line 214 of file WebPHandler.php.

References $header, VP8X_ALPHA, and VP8X_ANIM.

◆ decodeLosslessChunkHeader()

static WebPHandler::decodeLosslessChunkHeader ( $header )

static

Decodes a lossless chunk header.

Parameters

string $header First few bytes of the header, expected to be at least 13 bytes long

Returns: bool|array See WebPHandler::decodeHeader

Definition at line 189 of file WebPHandler.php.

References $header, and wfDebugLog().

◆ decodeLossyChunkHeader()

static WebPHandler::decodeLossyChunkHeader ( $header )

staticprotected

Decodes a lossy chunk header.

Parameters

string $header First few bytes of the header, expected to be at least 18 bytes long

Returns: bool|array See WebPHandler::decodeHeader

Definition at line 163 of file WebPHandler.php.

References $header, and wfDebugLog().

◆ extractMetadata()

static WebPHandler::extractMetadata ( $filename )

static

Extracts the image size and WebP type from a file.

Parameters

string $filename

Returns: array|bool Header data array with entries 'compression', 'width' and 'height', where 'compression' can be 'lossy', 'lossless', 'animated' or 'unknown'. False if file is not a valid WebP file.

Definition at line 97 of file WebPHandler.php.

References extractMetadataFromChunks(), RiffExtractor\findChunksFromFile(), and wfDebugLog().

Referenced by getMetadata().

◆ extractMetadataFromChunks()

static WebPHandler::extractMetadataFromChunks	(	$chunks,
		$filename
	)

static

Extracts the image size and WebP type from a file based on the chunk list.

Parameters

array[]	$chunks	Chunks as extracted by RiffExtractor
string	$filename

Returns: array Header data array with entries 'compression', 'width' and 'height', where 'compression' can be 'lossy', 'lossless', 'animated' or 'unknown'

Definition at line 128 of file WebPHandler.php.

References wfDebugLog().

Referenced by extractMetadata().

◆ getImageSize()

WebPHandler::getImageSize	(	$file,
		$path,
		$metadata = `false`
	)

Definition at line 233 of file WebPHandler.php.

References $file, $path, getMetadata(), and unserialize().

◆ getMetadata()

WebPHandler::getMetadata	(	$image,
		$path
	)

Get handler-specific metadata which will be saved in the img_metadata field.

Stable to override

Parameters

File \| FSFile	$image	The image object, or false if there isn't one. Warning, FSFile::getPropsFromPath might pass an FSFile instead of File (!)
string	$path	The filename

Returns: string A string of metadata in php serialized form (Run through serialize())

Reimplemented from MediaHandler.

Definition at line 49 of file WebPHandler.php.

References _MW_WEBP_VERSION, BROKEN_FILE, extractMetadata(), and serialize().

Referenced by getImageSize().

◆ getMetadataType()

WebPHandler::getMetadataType ( $image )

Get a string describing the type of metadata, for display purposes.

Stable to override

Note: This method is currently unused.

Parameters

File $image

Returns: string

Reimplemented from MediaHandler.

Definition at line 59 of file WebPHandler.php.

◆ getScalerType()

WebPHandler::getScalerType	(	$dstPath,
		$checkDstPath = `true`
	)

protected

Must use "im" for XCF.

Parameters

string	$dstPath
bool	$checkDstPath

Returns: string

Reimplemented from BitmapHandler.

Definition at line 309 of file WebPHandler.php.

◆ getThumbType()

WebPHandler::getThumbType	(	$ext,
		$mime,
		$params = `null`
	)

Render files as PNG.

Parameters

string	$ext
string	$mime
array \| null	$params

Returns: array

Reimplemented from MediaHandler.

Definition at line 298 of file WebPHandler.php.

◆ isAnimatedImage()

WebPHandler::isAnimatedImage ( $image )

Parameters

File $image

Returns: bool

Reimplemented from MediaHandler.

Definition at line 274 of file WebPHandler.php.

References unserialize().

◆ isMetadataValid()

WebPHandler::isMetadataValid	(	$image,
		$metadata
	)

Check if the metadata string is valid for this handler.

If it returns MediaHandler::METADATA_BAD (or false), Image will reload the metadata from the file and update the database. MediaHandler::METADATA_GOOD for if the metadata is a-ok, MediaHandler::METADATA_COMPATIBLE if metadata is old but backwards compatible (which may or may not trigger a metadata reload).

Note: Returning self::METADATA_BAD will trigger a metadata reload from file on page view. Always returning this from a broken file, or suddenly triggering as bad metadata for a large number of files can cause performance problems.

Stable to override

Parameters

File	$image
string	$metadata	The metadata in serialized form

Returns: bool|int

Reimplemented from MediaHandler.

Definition at line 63 of file WebPHandler.php.

References MediaHandler\METADATA_BAD, MediaHandler\METADATA_COMPATIBLE, MediaHandler\METADATA_GOOD, unserialize(), and wfDebug().

◆ mustRender()

WebPHandler::mustRender ( $file )

Parameters

File $file

Returns: bool True, not all browsers support WebP

Reimplemented from TransformationalImageHandler.

Definition at line 255 of file WebPHandler.php.

Member Data Documentation

◆ _MW_WEBP_VERSION

const WebPHandler::_MW_WEBP_VERSION = 1

private

Version of the metadata stored in db records.

Definition at line 41 of file WebPHandler.php.

Referenced by getMetadata().

◆ BROKEN_FILE

const WebPHandler::BROKEN_FILE = '0'

private

Value to store in img_metadata if there was an error extracting metadata.

Definition at line 33 of file WebPHandler.php.

Referenced by getMetadata().

◆ MINIMUM_CHUNK_HEADER_LENGTH

const WebPHandler::MINIMUM_CHUNK_HEADER_LENGTH = 18

private

Minimum chunk header size to be able to read all header types.

Definition at line 37 of file WebPHandler.php.

◆ VP8X_ALPHA

const WebPHandler::VP8X_ALPHA = 16

private

Definition at line 44 of file WebPHandler.php.

Referenced by decodeExtendedChunkHeader().

◆ VP8X_ANIM

const WebPHandler::VP8X_ANIM = 2

private

Definition at line 47 of file WebPHandler.php.

Referenced by decodeExtendedChunkHeader().

◆ VP8X_EXIF

const WebPHandler::VP8X_EXIF = 8

private

Definition at line 45 of file WebPHandler.php.

◆ VP8X_ICC

const WebPHandler::VP8X_ICC = 32

private

Definition at line 43 of file WebPHandler.php.

◆ VP8X_XMP

const WebPHandler::VP8X_XMP = 4

private

Definition at line 46 of file WebPHandler.php.

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

includes/media/WebPHandler.php

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ canAnimateThumbnail()

◆ canRender()

◆ decodeExtendedChunkHeader()

◆ decodeLosslessChunkHeader()

◆ decodeLossyChunkHeader()

◆ extractMetadata()

◆ extractMetadataFromChunks()

◆ getImageSize()

◆ getMetadata()

◆ getMetadataType()

◆ getScalerType()

◆ getThumbType()

◆ isAnimatedImage()

◆ isMetadataValid()

◆ mustRender()

Member Data Documentation

◆ _MW_WEBP_VERSION

◆ BROKEN_FILE

◆ MINIMUM_CHUNK_HEADER_LENGTH

◆ VP8X_ALPHA

◆ VP8X_ANIM

◆ VP8X_EXIF

◆ VP8X_ICC

◆ VP8X_XMP