MediaWiki  REL1_23
Static Public Member Functions | Public Attributes | Static Private Attributes
GIFMetadataExtractor Class Reference

GIF frame counter. More...

List of all members.

Static Public Member Functions

static decodeBPP ($data)
static getMetadata ($filename)
static readBlock ($fh, $includeLengths=false)
 Read a block.
static readGCT ($fh, $bpp)
static skipBlock ($fh)

Public Attributes

const MAX_SUBBLOCKS = 262144
const VERSION = 1

Static Private Attributes

static $gifExtensionSep
static $gifFrameSep
static $gifTerm

Detailed Description

GIF frame counter.

Definition at line 34 of file GIFMetadataExtractor.php.

Member Function Documentation

static GIFMetadataExtractor::decodeBPP ( $  data) [static]
Parameters:
string$data
Exceptions:
Exception
Returns:
int

Definition at line 282 of file GIFMetadataExtractor.php.

Referenced by getMetadata().

static GIFMetadataExtractor::getMetadata ( $  filename) [static]
Exceptions:
Exception
Parameters:
string$filename
Returns:
array

Definition at line 56 of file GIFMetadataExtractor.php.

References $comment, $term, array(), decodeBPP(), UtfNormal\quickIsNFCVerify(), readBlock(), readGCT(), skipBlock(), wfDebug(), wfRestoreWarnings(), and wfSuppressWarnings().

Referenced by GIFMetadataExtractorTest\testGetMetadata().

static GIFMetadataExtractor::readBlock ( $  fh,
$  includeLengths = false 
) [static]

Read a block.

In the GIF format, a block is made up of several sub-blocks. Each sub block starts with one byte saying how long the sub-block is, followed by the sub-block. The entire block is terminated by a sub-block of length 0.

Parameters:
resource$fhFile handle
bool$includeLengthsInclude the length bytes of the sub-blocks in the returned value. Normally this is false, except XMP is weird and does a hack where you need to keep these length bytes.
Exceptions:
Exception
Returns:
string The data.

Definition at line 329 of file GIFMetadataExtractor.php.

Referenced by getMetadata().

static GIFMetadataExtractor::readGCT ( $  fh,
$  bpp 
) [static]
Parameters:
resource$fh
int$bpp
Returns:
void

Definition at line 268 of file GIFMetadataExtractor.php.

Referenced by getMetadata().

static GIFMetadataExtractor::skipBlock ( $  fh) [static]
Parameters:
resource$fh
Exceptions:
Exception

Definition at line 300 of file GIFMetadataExtractor.php.

Referenced by getMetadata().

Member Data Documentation

GIFMetadataExtractor::$gifExtensionSep [static, private]

Definition at line 39 of file GIFMetadataExtractor.php.

GIFMetadataExtractor::$gifFrameSep [static, private]

Definition at line 36 of file GIFMetadataExtractor.php.

GIFMetadataExtractor::$gifTerm [static, private]

Definition at line 42 of file GIFMetadataExtractor.php.

const GIFMetadataExtractor::MAX_SUBBLOCKS = 262144

Definition at line 49 of file GIFMetadataExtractor.php.

const GIFMetadataExtractor::VERSION = 1

Definition at line 44 of file GIFMetadataExtractor.php.

Referenced by GIFHandler\isMetadataValid().

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