DKColourQuantizer Class Reference

generic interface and simple quantizer which performs uniform quantization. More...

Inheritance diagram for DKColourQuantizer:

Instance Methods
(void)	- analyse:
(NSColor *)	- colourForIndex:
(NSArray *)	- colourTable
(NSUInteger)	- indexForRGB:
(id)	- initWithBitmapImageRep:maxColours:colourBits:
(NSInteger)	- numberOfColours
Instance Methods inherited from NSObject
(NSString *)	- address
(DKStyleRegistry *)	- applicationWillReturnStyleRegistry
(BOOL)	- canBeUsedWithSelectionTool
(id)	- categoryManager:shouldReplaceObject:withObject:
(Class)	- classForCoder
(NSColor *)	- colorValue
(NSColor *)	- colourValue
(id)	- copy
(void)	- dealloc
(id)	- deepCopy
(NSDictionary *)	- dimensionValuesForArrowStroke:
(CGFloat)	- drawing:convertDistanceToExternalCoordinates:
(NSPoint)	- drawing:convertLocationToExternalCoordinates:
(void)	- drawing:didDrawRect:inView:
(void)	- drawing:willDrawRect:inView:
(NSString *)	- drawing:willReturnAbbreviationForUnit:
(NSString *)	- drawing:willReturnFormattedCoordinateForDistance:
(CGFloat)	- drawingWillReturnUnitToPointsConversonFactor:
(void)	- finalize
(NSString *)	- hexString
(void)	- hotspot:didEndTrackingWithEvent:inView:
(void)	- hotspot:isTrackingWithEvent:inView:
(void)	- hotspot:willBeginTrackingWithEvent:inView:
(NSData *)	- imageData
(NSImage *)	- imageResourceNamed:
(id)	- init
(id)	- initWithExpression:
(id)	- instantiateObjectWithShortName:parameters:
(BOOL)	- isLiteralValue
(void)	- layoutManager:willPlaceGlyphAtIndex:atLocation:pathAngle:yOffset:
(void)	- menuItem:wasAddedForObject:inCategory:
(BOOL)	- moveObjectTo:position:slope:userInfo:
(id)	- mutableCopy
(void)	- oneShotComplete
(void)	- oneShotHasReached:
(void)	- oneShotWillBegin
(void)	- path:elementIndex:type:points:subPathIndex:subPathClosed:contextInfo:
(id)	- placeLinkFromPoint:toPoint:onPath:linkNumber:userInfo:
(id)	- placeObjectAtPoint:onPath:position:slope:userInfo:
(NSPoint)	- point
(NSPoint)	- pointForTextLayout
(DKStyle *)	- registry:shouldReplaceStyle:withStyle:
(NSBezierPath *)	- renderer:willRenderPath:
(void)	- routeFinder:progressHasReached:
(void)	- setValue:forNumericParameter:
(NSString *)	- stringValue
(CGFloat)	- taperFactorAtDistance:onPath:ofLength:
(void)	- toolDidPerformUndoableAction:
(void)	- toolWillPerformUndoableAction:
(NSURL *)	- url
Instance Methods inherited from <NSObject>
(NSString *)	- description
(NSUInteger)	- hash
(BOOL)	- isEqual:
Instance Methods inherited from <NSKeyValueBindingCreation>
(void)	- bind:toObject:withKeyPath:options:
(NSArray *)	- exposedBindings
(NSDictionary *)	- infoForBinding:
(NSArray *)	- optionDescriptionsForBinding:
(void)	- unbind:
(Class)	- valueClassForBinding:

Protected Attributes
NSMutableArray *	m_cTable
NSSize	m_imageSize
NSUInteger	m_maxColours
NSUInteger	m_nBits

Additional Inherited Members
Class Methods inherited from NSObject
(id)	+ alloc
(Class)	+ class
(void)	+ initialize
(void)	+ load
(id)	+ new
Class Methods inherited from <NSKeyValueBindingCreation>
(void)	+ exposeBinding:

Detailed Description

generic interface and simple quantizer which performs uniform quantization.

Author

Contributions from the community; see CONTRIBUTORS.md

Date

2005-2015

Copyright

MPL2; see LICENSE.txt

s Results with this quantizer are generally only barely acceptable - colours may be mapped to something grossly different from the original since this does not take any notice of the pixels actually used in the image, only the basic size of the RGB colour space it is given.

See also

DKOctreeQuantizer

Method Documentation

- (void) analyse:

(NSBitmapImageRep *)

rep

- (NSColor*) colourForIndex:

(NSUInteger)

index

- (NSArray*) colourTable

- (NSUInteger) indexForRGB:

(NSUInteger[])

rgb

- (id) initWithBitmapImageRep:		(NSBitmapImageRep *)	rep
maxColours:		(NSUInteger)	maxColours
colourBits:		(NSUInteger)	nBits

- (NSInteger) numberOfColours

Member Data Documentation

- (NSMutableArray*) m_cTable

protected

- (NSSize) m_imageSize

protected

- (NSUInteger) m_maxColours

protected

- (NSUInteger) m_nBits

protected