Fixed Colormap Quantizer base class. More...

#include <ilviews/bitmaps/fixquant.h>

Inheritance diagram for IlvFixedQuantizer:

Public Member Functions
	IlvFixedQuantizer (IlvColorMap *cmap=0)
	Constructor. More...

	~IlvFixedQuantizer ()
	Destructor. More...

IlvColorMap *	computeColorMap (const IlvBitmapData *data, IlUInt numcolors)
	Returns the colormap. More...

Public Member Functions inherited from IlvQuantizer
virtual IlBoolean	hasDithering () const
	Returns whether the instance uses Floyd-Steinberg dithering. More...

virtual IlvIndexedBitmapData *	quantize (const IlvBitmapData *data, IlUInt numcols)
	Creates indexed bitmap data from true color bitmap data using the requested number of colors (this number can be ignored by the actual quantizer). The default implementation calls `computeColorMap` and then `remap`. More...

virtual IlvIndexedBitmapData *	remap (const IlvBitmapData data, const IlvColorMap colormap, IlBoolean fsdither=IlTrue)
	Remaps the true colors to the indexed colors. More...

void	setDithering (IlBoolean dither)
	Sets whether the instance uses Floyd-Steinberg dithering. More...

Detailed Description

Fixed Colormap Quantizer base class.

Library: xviews or winviews or mviews (mutually exclusive)

This class provides methods to convert true color images to indexed images using a fixed colormap (The colormap is not computed from the source image). This class has two subclasses:

IlvQuickQuantizer to remap to colors well distributed in the color cube (colors are computed using 3 bits for red and green and 2 bits for blue).
IlvNetscapeQuantizer to remap to the predefined Netscape colormap (it uses 216 colors).

See also: IlvFixedQuantizer, IlvQuickQuantizer, IlvWUQuantizer, IlvNetscapeQuantizer

Constructor & Destructor Documentation

◆ IlvFixedQuantizer()

IlvFixedQuantizer::IlvFixedQuantizer ( IlvColorMap * cmap = 0 )

Constructor.

Parameters

cmap	The colormap to use.

◆ ~IlvFixedQuantizer()

IlvFixedQuantizer::~IlvFixedQuantizer ( )

Destructor.

The default implementation unlocks the colormap.

Member Function Documentation

◆ computeColorMap()

IlvColorMap* IlvFixedQuantizer::computeColorMap	(	const IlvBitmapData *	data,
		IlUInt	numcolors
	)

virtual

Returns the colormap.