PNGMetadataExtractor Class Reference

PNG frame counter. More...

Collaboration diagram for PNGMetadataExtractor:

Static Public Member Functions
static	getMetadata ( $filename)

Public Attributes
const	MAX_CHUNK_SIZE = 3145728
const	VERSION = 1

Static Private Member Functions
static	read ( $fh, $size)
	Read a chunk, checking to make sure its not too big.

Static Private Attributes
static int	$crcSize
static string	$pngSig
static array	$textChunks

Detailed Description

PNG frame counter.

Definition at line 33 of file PNGMetadataExtractor.php.

Member Function Documentation

getMetadata()

static PNGMetadataExtractor::getMetadata ( $filename )

static

Definition at line 46 of file PNGMetadataExtractor.php.

References $t, $value, list, read(), wfDebug(), and wfTimestamp().

Referenced by BitmapMetadataHandler\PNG(), PNGMetadataExtractorTest\testApngAnimationMetadata(), PNGMetadataExtractorTest\testPngBitDepth1(), PNGMetadataExtractorTest\testPngBitDepth8(), PNGMetadataExtractorTest\testPngGreyscaleColour(), PNGMetadataExtractorTest\testPngGreyscaleNoAlphaColour(), PNGMetadataExtractorTest\testPngIndexColour(), PNGMetadataExtractorTest\testPngNativeText(), PNGMetadataExtractorTest\testPngNativeTextNonAscii(), PNGMetadataExtractorTest\testPngNativetZtxt(), PNGMetadataExtractorTest\testPngRgbColour(), PNGMetadataExtractorTest\testPngRgbNoAlphaColour(), and PNGMetadataExtractorTest\testStaticPngAnimationMetadata().

read()

static PNGMetadataExtractor::read ( $fh, $size )

staticprivate

Read a chunk, checking to make sure its not too big.

Parameters

resource	$fh	The file handle
int	$size	Size in bytes.

Exceptions

Exception

If too big

Returns

string The chunk.

Definition at line 420 of file PNGMetadataExtractor.php.

Referenced by getMetadata().

Member Data Documentation

$crcSize

int PNGMetadataExtractor::$crcSize

staticprivate

Definition at line 38 of file PNGMetadataExtractor.php.

$pngSig

string PNGMetadataExtractor::$pngSig

staticprivate

Definition at line 35 of file PNGMetadataExtractor.php.

$textChunks

array PNGMetadataExtractor::$textChunks

staticprivate

Definition at line 41 of file PNGMetadataExtractor.php.

MAX_CHUNK_SIZE

const PNGMetadataExtractor::MAX_CHUNK_SIZE = 3145728

Definition at line 44 of file PNGMetadataExtractor.php.

VERSION

const PNGMetadataExtractor::VERSION = 1

Definition at line 43 of file PNGMetadataExtractor.php.

Referenced by PNGHandler\isMetadataValid(), and BitmapMetadataHandler\PNG().

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

• includes/media/PNGMetadataExtractor.php