IlvGIFStreamer Class Reference

Bitmap streamer class. More...

#include <ilviews/bitmaps/gif.h>

Inheritance diagram for IlvGIFStreamer:

Public Member Functions
	IlvGIFStreamer ()
	Constructor.
IlBoolean	canRead () const
	Indicates that the instance can read from a stream. More...
IlBoolean	canWrite () const
	Indicates that the instance can write to a stream. More...
IlBoolean	checkSignature (const IlUChar *data, IlUInt size)
	Checks the signature of the input stream. More...
IlBoolean	isGIF87Transparent () const
	Gets whether a GIF87 image is transparent by default. More...
IlvBitmapData *	read (std::istream &stream)
	Reads a GIF image from a stream. More...
void	setGIF87Transparent (IlBoolean transparent)
	Sets whether a GIF87 image is transparent by default. More...
Public Member Functions inherited from IlvBitmapStreamer
virtual void	callReadProgressCallback (IlUInt current, IlUInt max)
	Calls the callback for read progression. More...
virtual void	callWriteProgressCallback (IlUInt current, IlUInt max)
	Calls the callback for write progression. More...
virtual const char *	getName () const
	Returns the internal name of the streamer. More...
IlvQuantizer *	getQuantizer () const
	Returns the quantizer used by this streamer. More...
virtual IlvBitmapInformation *	readInfo (std::istream &stream)
	Reads information from a stream. More...
void	setQuantizer (IlvQuantizer *quantizer)
	Sets the quantizer used (if needed) by this streamer. More...
virtual void	setReadProgressCallback (IlvProgressCallback rpCallback, IlAny arg=0)
	Sets the callback for read progression. More...
virtual void	setWriteProgressCallback (IlvProgressCallback wpCallback, IlAny arg=0)
	Sets the callback for write progression. More...
virtual IlBoolean	write (IlvBitmapData *bitmapData, std::ostream &stream)
	Writes an IlvBitmapData to a stream. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvBitmapStreamer
static IlvBitmapStreamer *	Get (const char *name)
	Returns a streamer from its name. More...
static IlvBitmapStreamer **	GetRegisteredStreamers (IlUInt &count)
	Returns the registered streamers. More...
static IlvBitmap *	Read (IlvDisplay *display, std::istream &stream, const IlUChar *signature, IlUInt signatureLen)
	Reads a bitmap using the registered streamers. More...
static IlvBitmapData *	ReadBitmapData (std::istream &stream, const IlUChar *signature, IlUInt signatureLen)
	Reads bitmap data using the registered streamers. More...
static IlvBitmapInformation *	ReadInfo (std::istream &stream, const IlUChar *signature, IlUInt signatureLen)
	Reads bitmap information using the registered streamers. More...
static void	Register (IlvBitmapStreamer *streamer)
	Registers the given streamer. More...
static IlBoolean	UnRegister (IlvBitmapStreamer *streamer)
	Unregisters the given streamer. More...

Detailed Description

Bitmap streamer class.

Library: xviews or winviews or mviews (mutually exclusive)

This streamer provides methods to deal with a stream containing a Compuserve GIF image.

This streamer can only read images, but is unable to save them.

Member Function Documentation

IlBoolean IlvGIFStreamer::canRead ( ) const

virtual

Indicates that the instance can read from a stream.

Returns

IlTrue.

Reimplemented from IlvBitmapStreamer.

IlBoolean IlvGIFStreamer::canWrite ( ) const

virtual

Indicates that the instance can write to a stream.

Returns

IlFalse: there is no means to serialize an image using the GIF format with Rogue Wave Views.

Reimplemented from IlvBitmapStreamer.

IlBoolean IlvGIFStreamer::checkSignature ( const IlUChar *  data, IlUInt  size  )

virtual

Checks the signature of the input stream.

Parameters

data	The data containing the signature of the stream.
size	The size of the data containing the signature.

Returns

IlTrue if the data contains a GIF signature.

Implements IlvBitmapStreamer.

IlBoolean IlvGIFStreamer::isGIF87Transparent

(

)

const

Gets whether a GIF87 image is transparent by default.

Returns

IlTrue if the image is transparent.

IlvBitmapData* IlvGIFStreamer::read ( std::istream &  stream )

virtual

Reads a GIF image from a stream.

Parameters

stream

The stream to read from.

Returns

The bitmap data that was read.

Reimplemented from IlvBitmapStreamer.

void IlvGIFStreamer::setGIF87Transparent

(

IlBoolean

transparent

)

Sets whether a GIF87 image is transparent by default.

Parameters

transparent

IlTrue if the image is transparent.