Class to deal with reconciling and extracting metadata from bitmap images. More...

Collaboration diagram for BitmapMetadataHandler:

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Public Member Functions
	addMetadata ( $metaArray, $type='other')
	Add misc metadata.

	getExif ( $filename, $byteOrder)
	Get exif info using exif class.

	getMetadataArray ()
	Merge together the various types of metadata the different types have different priorites, and are merged in order.

Static Public Member Functions
static	getTiffByteOrder ( $filename)
	Read the first 2 bytes of a tiff file to figure out Little Endian or Big Endian.

static	GIF ( $filename)
	function for gif images.

static	Jpeg ( $filename)
	Main entry point for jpeg's.

static	PNG ( $filename)
	Entry point for png At some point in the future this might merge the png various tEXt chunks to that are interesting, but for now it only does XMP.

static	Tiff ( $filename)
	This doesn't do much yet, but eventually I plan to add XMP support for Tiff.

Private Member Functions
	doApp13 ( $app13)
	This does the photoshop image resource app13 block of interest, IPTC-IIM metadata is stored here.

Private Attributes
string	$iptcType = 'iptc-no-hash'

array	$metadata = []

array	$metaPriority
	Metadata priority.

Detailed Description

Class to deal with reconciling and extracting metadata from bitmap images.

This is meant to comply with http://www.metadataworkinggroup.org/pdf/mwg_guidance.pdf

This sort of acts as an intermediary between MediaHandler::getMetadata and the various metadata extractors.

Todo: Other image formats.

Definition at line 36 of file BitmapMetadataHandler.php.

Member Function Documentation

◆ addMetadata()

BitmapMetadataHandler::addMetadata	(		$metaArray,
			$type = 'other' )

Add misc metadata.

Warning: atm if the metadata category doesn't have a priority, it will be silently discarded.

Parameters

array	$metaArray	Array of metadata values
string	$type	Type. defaults to other. if two things have the same type they're merged

Definition at line 105 of file BitmapMetadataHandler.php.

References $type.

Referenced by doApp13(), and getExif().

◆ doApp13()

BitmapMetadataHandler::doApp13 ( $app13 )

private

This does the photoshop image resource app13 block of interest, IPTC-IIM metadata is stored here.

Mostly just calls doPSIR and doIPTC

Parameters

string $app13 String containing app13 block from jpeg file

Definition at line 63 of file BitmapMetadataHandler.php.

References $e, addMetadata(), JpegMetadataExtractor\doPSIR(), IPTC\parse(), and wfDebug().

◆ getExif()

BitmapMetadataHandler::getExif	(		$filename,
			$byteOrder )

Get exif info using exif class.

Basically what used to be in BitmapHandler::getMetadata(). Just calls stuff in the Exif class.

Parameters are passed to the Exif class.

Parameters

string	$filename
string	$byteOrder

Definition at line 88 of file BitmapMetadataHandler.php.

References $wgShowEXIF, and addMetadata().

◆ getMetadataArray()

BitmapMetadataHandler::getMetadataArray ( )

Merge together the various types of metadata the different types have different priorites, and are merged in order.

This function is generally called by the media handlers' getMetadata()

Returns: array Metadata array

Definition at line 123 of file BitmapMetadataHandler.php.

References $type.

◆ getTiffByteOrder()

static BitmapMetadataHandler::getTiffByteOrder ( $filename )

static

Read the first 2 bytes of a tiff file to figure out Little Endian or Big Endian.

Needed for exif stuff.

Parameters

string $filename The filename

Returns: string 'BE' or 'LE' or false

Definition at line 298 of file BitmapMetadataHandler.php.

Referenced by Tiff().

◆ GIF()

static BitmapMetadataHandler::GIF ( $filename )

static

function for gif images.

They don't really have native metadata, so just merges together XMP and image comment.

Parameters

string $filename Full path to file

Returns: array Metadata array

Definition at line 232 of file BitmapMetadataHandler.php.

References $type, GIFMetadataExtractor\getMetadata(), XMPReader\isSupported(), and GIFMetadataExtractor\VERSION.

Referenced by GIFHandler\getMetadata().

◆ Jpeg()

static BitmapMetadataHandler::Jpeg ( $filename )

static

Main entry point for jpeg's.

Parameters

string $filename Filename (with full path)

Returns: array Metadata result array.

Exceptions

MWException On invalid file.

Definition at line 158 of file BitmapMetadataHandler.php.

References $res, $type, XMPReader\isSupported(), and JpegMetadataExtractor\segmentSplitter().

Referenced by JpegHandler\getMetadata(), BitmapMetadataHandlerTest\testBadIPTC(), BitmapMetadataHandlerTest\testIPTCDates(), BitmapMetadataHandlerTest\testIPTCDatesInvalid(), BitmapMetadataHandlerTest\testJpegComment(), and BitmapMetadataHandlerTest\testMultilingualCascade().

◆ PNG()

static BitmapMetadataHandler::PNG ( $filename )

static

Entry point for png At some point in the future this might merge the png various tEXt chunks to that are interesting, but for now it only does XMP.

Parameters

string $filename Full path to file

Returns: array Array for storage in img_metadata.

Definition at line 200 of file BitmapMetadataHandler.php.

References $type, PNGMetadataExtractor\getMetadata(), XMPReader\isSupported(), and PNGMetadataExtractor\VERSION.

Referenced by PNGHandler\getMetadata().

◆ Tiff()

static BitmapMetadataHandler::Tiff ( $filename )

static

This doesn't do much yet, but eventually I plan to add XMP support for Tiff.

(PHP's exif support already extracts but needs some further processing because PHP's exif support is stupid...)

Todo: Add XMP support, so this function actually makes sense to put here.

The various exceptions this throws are caught later.

Parameters

string $filename

Exceptions

MWException

Returns: array The metadata.

Definition at line 271 of file BitmapMetadataHandler.php.

References getTiffByteOrder(), and Exif\version().

Referenced by TiffHandler\getMetadata().

Member Data Documentation

◆ $iptcType

string BitmapMetadataHandler::$iptcType = 'iptc-no-hash'

private

Definition at line 53 of file BitmapMetadataHandler.php.

◆ $metadata

array BitmapMetadataHandler::$metadata = []

private

Definition at line 38 of file BitmapMetadataHandler.php.

◆ $metaPriority

array BitmapMetadataHandler::$metaPriority

private

Initial value:

= [
        20 => [ 'other' ],
        40 => [ 'native' ],
        60 => [ 'iptc-good-hash', 'iptc-no-hash' ],
        70 => [ 'xmp-deprecated' ],
        80 => [ 'xmp-general' ],
        90 => [ 'xmp-exif' ],
        100 => [ 'iptc-bad-hash' ],
        120 => [ 'exif' ],
    ]

Metadata priority.

Definition at line 41 of file BitmapMetadataHandler.php.

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

includes/media/BitmapMetadataHandler.php

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Function Documentation

◆ addMetadata()

◆ doApp13()

◆ getExif()

◆ getMetadataArray()

◆ getTiffByteOrder()

◆ GIF()

◆ Jpeg()

◆ PNG()

◆ Tiff()

Member Data Documentation

◆ $iptcType

◆ $metadata

◆ $metaPriority