IlvColorMap Class Reference

Colormap class. More...

#include <ilviews/bitmaps/colormap.h>

Public Member Functions
	IlvColorMap (IlUInt numcols=256)
	Constructor. More...
virtual	~IlvColorMap ()
	Destructor. Releases the memory used by the instance.
IlUChar	getA (IlUInt index) const
	Returns the alpha component of the given index entry. More...
IlUChar	getB (IlUInt index) const
	Returns the blue component of the given index entry. More...
IlUInt	getColorNum () const
	Returns the number of color entries in the colormap. More...
IlBoolean	getEntry (IlUInt index, IlUChar &r, IlUChar &g, IlUChar &b) const
	Returns the color components of the given entry. More...
IlBoolean	getEntry (IlUInt index, IlUChar &r, IlUChar &g, IlUChar &b, IlUChar &a) const
	Returns all the color components of the given entry. More...
IlUChar	getG (IlUInt index) const
	Returns the green component of the given index entry. More...
IlUChar	getR (IlUInt index) const
	Returns the red component of the given index entry. More...
IlUInt	getRefCount () const
	Returns the reference count for this instance.
void	lock ()
	Locks the current instance.
IlBoolean	setEntry (IlUInt index, IlUChar r, IlUChar g, IlUChar b, IlUChar a=255)
	Sets an entry of the colormap. More...
void	unLock ()
	Unlocks the current instance. If the reference count is 0 the instance is deleted.

Detailed Description

Colormap class.

Library: display

The IlvColorMap class lets you manipulate colormaps. This class hides internal memory storage of a colormap. Colormaps can have an unlimited amount of color entries, each being described as a quadruplet of red, green, blue, and alpha components. Colormaps can be shared and must be locked and unlocked.

See Also

IlvIndexedBitmapData, IlvQuantizer

Constructor & Destructor Documentation

IlvColorMap::IlvColorMap

(

IlUInt

numcols = 256

)

Constructor.

Initializes a new IlvColorMap object representing a colormap.

Parameters

numcols

The number of entries in the colormap.

Member Function Documentation

IlUChar IlvColorMap::getA

(

IlUInt

index

)

const

Returns the alpha component of the given index entry.

Parameters

index

The index of the entry.

Returns

The alpha component of the given index entry.

IlUChar IlvColorMap::getB

(

IlUInt

index

)

const

Returns the blue component of the given index entry.

Parameters

index

The index of the entry.

Returns

The blue component of the given index entry.

IlUInt IlvColorMap::getColorNum

(

)

const

Returns the number of color entries in the colormap.

Returns

The number of color entries in the colormap.

IlBoolean IlvColorMap::getEntry	(	IlUInt	index,
		IlUChar &	r,
		IlUChar &	g,
		IlUChar &	b
	)		const

Returns the color components of the given entry.

Parameters

index	The index of the entry.
r	The red component of the entry.
g	The green component of the entry.
b	The blue component of the entry.

Returns

IlTrue if index is a valid index entry, IlFalse if not.

IlBoolean IlvColorMap::getEntry	(	IlUInt	index,
		IlUChar &	r,
		IlUChar &	g,
		IlUChar &	b,
		IlUChar &	a
	)		const

Returns all the color components of the given entry.

Parameters

index	The index of the entry.
r	The red component of the entry.
g	The green component of the entry.
b	The blue component of the entry.
a	The alpha component of the entry.

Returns

IlTrue if index is a valid index entry, IlFalse if not.

IlUChar IlvColorMap::getG

(

IlUInt

index

)

const

Returns the green component of the given index entry.

Parameters

index

The index of the entry.

Returns

The green component of the given index entry.

IlUChar IlvColorMap::getR

(

IlUInt

index

)

const

Returns the red component of the given index entry.

Parameters

index

The index of the entry.

Returns

The red component of the given index entry.

IlBoolean IlvColorMap::setEntry	(	IlUInt	index,
		IlUChar	r,
		IlUChar	g,
		IlUChar	b,
		IlUChar	a = 255
	)

Sets an entry of the colormap.

Parameters

index	The index of the entry.
r	The red component of the entry.
g	The green component of the entry.
b	The blue component of the entry.
a	The alpha component of the entry.