MediaWiki  master
PNGHandler Class Reference

Handler for PNG images. More...

Inheritance diagram for PNGHandler:
Collaboration diagram for PNGHandler:

Public Member Functions

 canAnimateThumbnail ($image)
 We do not support making APNG thumbnails, so always false. More...
 
 formatMetadata ($image, $context=false)
 
 getCommonMetaArray (File $image)
 Get a file type independent array of metadata. More...
 
 getLength ($file)
 Return the duration of an APNG file. More...
 
 getLongDesc ($image)
 
 getMetadata ($image, $filename)
 
 getMetadataType ($image)
 
 isAnimatedImage ($image)
 
 isMetadataValid ($image, $metadata)
 
 supportsBucketing ()
 
- Public Member Functions inherited from BitmapHandler
 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...
 
 getContentHeaders ($metadata)
 Get useful response headers for GET/HEAD requests for a file with the given metadata. 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)
 
 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...
 

Public Attributes

const BROKEN_FILE = '0'
 
- 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
 

Additional Inherited Members

- Static Public Member Functions inherited from BitmapHandler
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 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. More...
 
- Protected Member Functions inherited from BitmapHandler
 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...
 
- 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...
 

Detailed Description

Handler for PNG images.

Definition at line 29 of file PNG.php.

Member Function Documentation

PNGHandler::canAnimateThumbnail (   $image)

We do not support making APNG thumbnails, so always false.

Parameters
File$image
Returns
bool False

Definition at line 106 of file PNG.php.

PNGHandler::formatMetadata (   $image,
  $context = false 
)
Parameters
File$image
bool | IContextSource$contextContext to use (optional)
Returns
array|bool

Definition at line 55 of file PNG.php.

References $context, $image, MediaHandler\formatMetadataHelper(), and getCommonMetaArray().

PNGHandler::getCommonMetaArray ( File  $image)

Get a file type independent array of metadata.

Parameters
File$image
Returns
array The metadata array

Definition at line 70 of file PNG.php.

References File\getMetadata(), and unserialize().

Referenced by formatMetadata().

PNGHandler::getLength (   $file)

Return the duration of an APNG file.

Shown in the &query=imageinfo&iiprop=size api query.

Parameters
File$file
Returns
float The duration of the file.

Definition at line 185 of file PNG.php.

References unserialize().

PNGHandler::getLongDesc (   $image)
Parameters
File$image
Returns
string

Definition at line 145 of file PNG.php.

References $image, $wgLang, global, unserialize(), and wfMessage().

PNGHandler::getMetadata (   $image,
  $filename 
)
Parameters
File | FSFile$image
string$filename
Returns
string

Definition at line 37 of file PNG.php.

References $e, BitmapMetadataHandler\PNG(), serialize(), and wfDebug().

PNGHandler::getMetadataType (   $image)

Definition at line 110 of file PNG.php.

PNGHandler::isAnimatedImage (   $image)
Parameters
File$image
Returns
bool

Definition at line 89 of file PNG.php.

References $image, and unserialize().

PNGHandler::isMetadataValid (   $image,
  $metadata 
)

Definition at line 114 of file PNG.php.

References unserialize(), PNGMetadataExtractor\VERSION, and wfDebug().

PNGHandler::supportsBucketing ( )

Definition at line 200 of file PNG.php.

Member Data Documentation

const PNGHandler::BROKEN_FILE = '0'

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