BitmapHandler Class Reference

Generic handler for bitmap images. More...

Inheritance diagram for BitmapHandler:

Collaboration diagram for BitmapHandler:

Public Member Functions
	autoRotateEnabled ()
	canRotate ()
	Returns whether the current scaler supports rotation (im and gd do) More...
	makeParamString ($params)
	normaliseParams ($image, &$params)
	parseParamString ($str)
	rotate ($file, $params)
	validateParam ($name, $value)
Public Member Functions inherited from TransformationalImageHandler
	autoRotateEnabled ()
	Should we automatically rotate an image based on exif. More...
	canRotate ()
	Returns whether the current scaler supports rotation. More...
	doTransform ($image, $dstPath, $dstUrl, $params, $flags=0)
	Create a thumbnail. More...
	escapeMagickInput ($path, $scene=false)
	Escape a string for ImageMagick's input filenames. More...
	escapeMagickOutput ($path, $scene=false)
	Escape a string for ImageMagick's output filename. More...
	escapeMagickProperty ($s)
	Escape a string for ImageMagick's property input (e.g. More...
	extractPreRotationDimensions ($params, $rotation)
	Extracts the width/height if the image will be scaled before rotating. More...
	getMediaTransformError ($params, $errMsg)
	Get a MediaTransformError with error 'thumbnail_error'. More...
	isImageAreaOkForThumbnaling ($file, &$params)
	Check if the file is smaller than the maximum image area for thumbnailing. More...
	mustRender ($file)
	Returns whether the file needs to be rendered. More...
	normaliseParams ($image, &$params)
	rotate ($file, $params)
	Rotate a thumbnail. More...
Public Member Functions inherited from ImageHandler
	canRender ($file)
	getDimensionsString ($file)
	getImageArea ($image)
	Function that returns the number of pixels to be thumbnailed. More...
	getImageSize ($image, $path)
	getLongDesc ($file)
	getParamMap ()
	getScriptedTransform ($image, $script, $params)
	getScriptParams ($params)
	getShortDesc ($file)
	makeParamString ($params)
	normaliseParams ($image, &$params)
	parseParamString ($str)
	sanitizeParamsForBucketing ($params)
	validateParam ($name, $value)
	validateThumbParams (&$width, &$height, $srcWidth, $srcHeight, $mimeType)
	Validate thumbnail parameters and fill in the correct height. More...
Public Member Functions inherited from MediaHandler
	canAnimateThumbnail ($file)
	If the material is animated, we can animate the thumbnail. More...
	canRender ($file)
	True if the handled types can be transformed. More...
	canRotate ()
	True if the handler can rotate the media. More...
	convertMetadataVersion ($metadata, $version=1)
	Convert metadata version. More...
	doTransform ($image, $dstPath, $dstUrl, $params, $flags=0)
	Get a MediaTransformOutput object representing the transformed output. More...
	filterThumbnailPurgeList (&$files, $options)
	Remove files from the purge list. More...
	formatMetadata ($image, $context=false)
	Get an array structure that looks like this: More...
	formatMetadataHelper ($metadataArray, $context=false)
	sorts the visible/invisible field. More...
	getAvailableLanguages (File $file)
	Get list of languages file can be viewed in. More...
	getCommonMetaArray (File $file)
	Get an array of standard (FormatMetadata type) metadata values. More...
	getDefaultRenderLanguage (File $file)
	On file types that support renderings in multiple languages, which language is used by default if unspecified. More...
	getDimensionsString ($file)
	Shown in file history box on image description page. More...
	getEntireText (File $file)
	Get the text of the entire document. More...
	getImageSize ($image, $path)
	Get an image size array like that returned by getimagesize(), or false if it can't be determined. More...
	getLength ($file)
	If its an audio file, return the length of the file. More...
	getLongDesc ($file)
	Long description. More...
	getMetadata ($image, $path)
	Get handler-specific metadata which will be saved in the img_metadata field. More...
	getMetadataType ($image)
	Get a string describing the type of metadata, for display purposes. More...
	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. More...
	getPageText (File $image, $page)
	Generic getter for text layer. More...
	getParamMap ()
	Get an associative array mapping magic word IDs to parameter names. More...
	getRotation ($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. More...
	getScriptedTransform ($image, $script, $params)
	Get a MediaTransformOutput object representing an alternate of the transformed output which will call an intermediary thumbnail assist script. More...
	getShortDesc ($file)
	Short description. More...
	getStreamHeaders ($metadata)
	Get useful response headers for GET/HEAD requests for a file with the given metadata. More...
	getThumbType ($ext, $mime, $params=null)
	Get the thumbnail extension and MIME type for a given source MIME type. More...
	getTransform ($image, $dstPath, $dstUrl, $params)
	Get a MediaTransformOutput object representing the transformed output. More...
	getWarningConfig ($file)
	Gets configuration for the file warning message. More...
	isAnimatedImage ($file)
	The material is an image, and is animated. More...
	isEnabled ()
	False if the handler is disabled for all files. More...
	isExpensiveToThumbnail ($file)
	True if creating thumbnails from the file is large or otherwise resource-intensive. More...
	isMetadataValid ($image, $metadata)
	Check if the metadata string is valid for this handler. More...
	isMultiPage ($file)
	True if the type has multi-page capabilities. More...
	isVectorized ($file)
	The material is vectorized and thus scaling is lossless. More...
	makeParamString ($params)
	Merge a parameter array into a string appropriate for inclusion in filenames. More...
	mustRender ($file)
	True if handled types cannot be displayed directly in a browser but can be rendered. More...
	normaliseParams ($image, &$params)
	Changes the parameter array as necessary, ready for transformation. More...
	pageCount (File $file)
	Page count for a multi-page document, false if unsupported or unknown. More...
	parseParamString ($str)
	Parse a param string made with makeParamString back into an array. More...
	parserTransformHook ($parser, $file)
	Modify the parser object post-transform. More...
	removeBadFile ($dstPath, $retval=0)
	Check for zero-sized thumbnails. More...
	sanitizeParamsForBucketing ($params)
	Returns a normalised params array for which parameters have been cleaned up for bucketing purposes. More...
	supportsBucketing ()
	Returns whether or not this handler supports the chained generation of thumbnails according to buckets. More...
	validateParam ($name, $value)
	Validate a thumbnail parameter at parse time. More...
	verifyUpload ($fileName)
	File validation hook called on upload. More...

Static Public Member Functions
static	imageJpegWrapper ($dst_image, $thumbPath, $quality=95)
	Callback for transformGd when transforming jpeg images. More...
Static Public Member Functions inherited from MediaHandler
static	fitBoxWidth ($boxWidth, $boxHeight, $maxHeight)
	Calculate the largest thumbnail width for a given original file size such that the thumbnail's height is at most $maxHeight. More...
static	getGeneralLongDesc ($file)
	Used instead of getLongDesc if there is no handler registered for file. More...
static	getGeneralShortDesc ($file)
	Used instead of getShortDesc if there is no handler registered for file. More...
static	getHandler ($type)
	Get a MediaHandler for a given MIME type from the instance cache. More...
static	getMetadataVersion ()
	Get metadata version. More...
static	resetCache ()
	Resets all static caches. More...

Protected Member Functions
	getScalerType ($dstPath, $checkDstPath=true)
	Returns which scaler type should be used. More...
	imageMagickSubsampling ($pixelFormat)
	Get ImageMagick subsampling factors for the target JPEG pixel format. More...
	transformCustom ($image, $params)
	Transform an image using a custom command. More...
	transformGd ($image, $params)
	Transform an image using the built in GD library. More...
	transformImageMagick ($image, $params)
	Transform an image using ImageMagick. More...
	transformImageMagickExt ($image, $params)
	Transform an image using the Imagick PHP extension. More...
Protected Member Functions inherited from TransformationalImageHandler
	escapeMagickPath ($path, $scene=false)
	Armour a string against ImageMagick's GetPathComponent(). More...
	getClientScalingThumbnailImage ($image, $scalerParams)
	Get a ThumbnailImage that respresents an image that will be scaled client side. More...
	getMagickVersion ()
	Retrieve the version of the installed ImageMagick You can use PHPs version_compare() to use this value Value is cached for one hour. More...
	getScalerType ($dstPath, $checkDstPath=true)
	Returns what sort of scaler type should be used. More...
	getThumbnailSource ($file, $params)
	Get the source file for the transform. More...
	transformCustom ($image, $params)
	Transform an image using a custom command. More...
	transformGd ($image, $params)
	Transform an image using the built in GD library. More...
	transformImageMagick ($image, $params)
	Transform an image using ImageMagick. More...
	transformImageMagickExt ($image, $params)
	Transform an image using the Imagick PHP extension. More...
Protected Member Functions inherited from MediaHandler
	logErrorForExternalProcess ($retval, $err, $cmd)
	Log an error that occurred in an external process. More...
	visibleMetadataFields ()
	Get a list of metadata items which should be displayed when the metadata table is collapsed. More...

Additional Inherited Members
Public Attributes inherited from MediaHandler
const	MAX_ERR_LOG_SIZE = 65535
	Max length of error logged by logErrorForExternalProcess() More...
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. More...
Static Protected Attributes inherited from MediaHandler
static MediaHandler[]	$handlers = []
	Instance cache with array of MediaHandler. More...

Detailed Description

Generic handler for bitmap images.

Definition at line 29 of file Bitmap.php.

Member Function Documentation

BitmapHandler::autoRotateEnabled

(

)

See also

$wgEnableAutoRotation

Returns

bool Whether auto rotation is enabled

Definition at line 528 of file Bitmap.php.

References $wgEnableAutoRotation, canRotate(), and global.

Referenced by ExifBitmapHandler\getImageSize(), and ExifBitmapHandler\getRotation().

BitmapHandler::canRotate

(

)

Returns whether the current scaler supports rotation (im and gd do)

Returns

bool

Definition at line 505 of file Bitmap.php.

References getScalerType().

Referenced by autoRotateEnabled().

BitmapHandler::getScalerType (   $dstPath,   $checkDstPath = true  )

protected

Returns which scaler type should be used.

Creates parent directories for $dstPath and returns 'client' on error

Parameters

string	$dstPath
bool	$checkDstPath

Returns

string|Callable One of client, im, custom, gd, imext or an array( object, method )

Definition at line 39 of file Bitmap.php.

References $wgCustomConvertCommand, $wgUseImageMagick, $wgUseImageResize, and global.

Referenced by canRotate(), and rotate().

static BitmapHandler::imageJpegWrapper (   $dst_image,   $thumbPath,   $quality = 95  )

static

Callback for transformGd when transforming jpeg images.

Definition at line 495 of file Bitmap.php.

BitmapHandler::imageMagickSubsampling (   $pixelFormat )

protected

Get ImageMagick subsampling factors for the target JPEG pixel format.

Parameters

string

$pixelFormat

one of 'yuv444', 'yuv422', 'yuv420'

Returns

array of string keys

Definition at line 113 of file Bitmap.php.

Referenced by transformImageMagick(), and transformImageMagickExt().

BitmapHandler::makeParamString

(

$params

)

Definition at line 62 of file Bitmap.php.

References $params, and $res.

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

Parameters

File	$image
array	$params

Returns

bool

Definition at line 94 of file Bitmap.php.

References $image, $params, $wgMaxInterlacingAreas, ImageHandler\getImageArea(), and global.

BitmapHandler::parseParamString

(

$str

)

Definition at line 71 of file Bitmap.php.

References $params.

BitmapHandler::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

Definition at line 546 of file Bitmap.php.

References $params, $retval, $wgImageMagickConvertCommand, TransformationalImageHandler\escapeMagickInput(), TransformationalImageHandler\escapeMagickOutput(), MediaHandler\getRotation(), getScalerType(), global, MediaHandler\logErrorForExternalProcess(), wfDebug(), wfEscapeShellArg(), and wfShellExecWithStderr().

BitmapHandler::transformCustom (   $image,   $params  )

protected

Transform an image using a custom command.

Parameters

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

Returns

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

Definition at line 372 of file Bitmap.php.

References $params, $retval, $wgCustomConvertCommand, TransformationalImageHandler\getMediaTransformError(), global, MediaHandler\logErrorForExternalProcess(), wfDebug(), wfEscapeShellArg(), and wfShellExecWithStderr().

BitmapHandler::transformGd (   $image,   $params  )

protected

Transform an image using the built in GD library.

Parameters

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

Returns

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

Definition at line 404 of file Bitmap.php.

References $image, $params, TransformationalImageHandler\extractPreRotationDimensions(), TransformationalImageHandler\getMediaTransformError(), MediaHandler\getRotation(), list, wfDebug(), and wfMessage().

BitmapHandler::transformImageMagick (   $image,   $params  )

protected

Transform an image using ImageMagick.

Parameters

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

Returns

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

Definition at line 134 of file Bitmap.php.

References $image, $params, $retval, $wgImageMagickConvertCommand, $wgImageMagickTempDir, $wgJpegPixelFormat, $wgMaxAnimatedGifArea, $wgSharpenParameter, $wgSharpenReductionThreshold, TransformationalImageHandler\escapeMagickInput(), TransformationalImageHandler\escapeMagickOutput(), TransformationalImageHandler\escapeMagickProperty(), TransformationalImageHandler\extractPreRotationDimensions(), ImageHandler\getImageArea(), TransformationalImageHandler\getMagickVersion(), TransformationalImageHandler\getMediaTransformError(), MediaHandler\getRotation(), global, imageMagickSubsampling(), MediaHandler\isAnimatedImage(), list, MediaHandler\logErrorForExternalProcess(), string, unserialize(), wfDebug(), and wfShellExecWithStderr().

BitmapHandler::transformImageMagickExt (   $image,   $params  )

protected

Transform an image using the Imagick PHP extension.

Parameters

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

Returns

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

Definition at line 277 of file Bitmap.php.

References $e, $image, $params, $wgJpegPixelFormat, $wgMaxAnimatedGifArea, $wgMaxInterlacingAreas, $wgSharpenParameter, $wgSharpenReductionThreshold, as, TransformationalImageHandler\extractPreRotationDimensions(), ImageHandler\getImageArea(), TransformationalImageHandler\getMediaTransformError(), MediaHandler\getRotation(), global, imageMagickSubsampling(), MediaHandler\isAnimatedImage(), list, string, and wfDebug().

BitmapHandler::validateParam	(		$name,
			$value
	)

Definition at line 81 of file Bitmap.php.

References $name, and $value.

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

• includes/media/Bitmap.php