IlvWUQuantizer Class Reference

WU quantizer class. More...

#include <ilviews/bitmaps/wuquant.h>

Inheritance diagram for IlvWUQuantizer:

List of all members.

Public Member Functions
	IlvWUQuantizer ()
	Constructor.
IlvColorMap *	computeColorMap (const IlvBitmapData *data, IlUInt numcolors)
	Computes the colormap from the original true color bitmap data.

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Detailed Description

WU quantizer class.

Library: display

This class provides methods to convert true color images to indexed images using a computed colormap. The method used is known as the WU method (see Graphics Gems Vol II), which gives very good results at reasonable speed. This method is the default method used by the Views library to create an IlvBitmap from true color bitmap data on indexed displays.

See also:

IlvFixedQuantizer, IlvQuantizer, IlvNetscapeQuantizer, IlvQuickQuantizer

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Member Function Documentation

IlvColorMap* IlvWUQuantizer::computeColorMap	(	const IlvBitmapData *	data,
		IlUInt	numcolors
	)			[virtual]

Computes the colormap from the original true color bitmap data.

Parameters:

	data	The original true color bitmap data.
	numcolors	The requested number of colors.

Returns:

The computed colormap. It has at most numcolors colors.

Implements IlvQuantizer.