A subclass of ImageFileFormat for reading GIF files. More...

Public Member Functions
	GIFImageFormat ()
	~GIFImageFormat ()
String	getFormatName ()
	Returns a description of this file format.
bool	canUnderstand (InputStream &input)
	Returns true if the given stream seems to contain data that this format understands.
Image	decodeImage (InputStream &input)
	Tries to decode and return an image from the given stream.
bool	writeImageToStream (const Image &sourceImage, OutputStream &destStream)
	Attempts to write an image to a stream.

Detailed Description

A subclass of ImageFileFormat for reading GIF files.

Constructor & Destructor Documentation

GIFImageFormat::GIFImageFormat ( )

GIFImageFormat::~GIFImageFormat ( )

String GIFImageFormat::getFormatName ( ) [virtual]

Returns a description of this file format.

E.g. "JPEG", "PNG"

bool GIFImageFormat::canUnderstand ( InputStream & input ) [virtual]

Returns true if the given stream seems to contain data that this format understands.

The format class should only read the first few bytes of the stream and sniff for header bytes that it understands.

Image GIFImageFormat::decodeImage ( InputStream & input ) [virtual]

Tries to decode and return an image from the given stream.

This will be called for an image format after calling its canUnderStand() method to see if it can handle the stream.

Parameters:

input the stream to read the data from. The stream will be positioned at the start of the image data (but this may not necessarily be position 0)

bool GIFImageFormat::writeImageToStream	(	const Image &	sourceImage,
		OutputStream &	destStream
	)		`[virtual]`

Attempts to write an image to a stream.

To specify extra information like encoding quality, there will be appropriate parameters in the subclasses of the specific file types.

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