A class to define a conversion from pixel values to pixel color.

A Palette is defined by some anchor points. Each anchor point has a value between 0 and 1 and a color. An image has to be normalized and the values between the anchor points are interpolated. All member variables are public and can be directly manipulated. In most cases the default operator will be used to create a TImagePalette. In this case the member arrays have to be allocated by an application and will be deleted in the destructor of this class.

We provide few predefined palettes:

gHistImagePalette - palette used in TH2::Draw("col")
gWebImagePalette The web palette is a set of 216 colors that will not dither or shift on PCs or Macs. Browsers use this built-in palette when they need to render colors on monitors with only 256 colors (also called 8-bit color monitors). The 6x6x6 web palette provides very quick color index lookup and can be used for good quality conversion of images into 2-D histograms.
TImagePalette(Int_t ncolors, Int_t *colors) if ncolors <= 0 a default palette (see below) of 50 colors is defined.

if ncolors == 1 && colors == 0, then a Rainbow Palette is created.

if ncolors > 50 and colors=0, the DeepSea palette is used. (see TStyle::CreateGradientColorTable for more details)

if ncolors > 0 and colors = 0, the default palette is used with a maximum of ncolors.

The default palette defines:

index 0->9 : grey colors from light to dark grey
index 10->19 : "brown" colors
index 20->29 : "blueish" colors
index 30->39 : "redish" colors
index 40->49 : basic colors

Definition at line 83 of file TAttImage.h.

Public Member Functions
	TImagePalette ()
	Default constructor, sets all pointers to 0. More...

	TImagePalette (const TImagePalette &palette)
	Copy constructor. More...

	TImagePalette (UInt_t numPoints)
	Constructor for a palette with numPoints anchor points. More...

	TImagePalette (Int_t ncolors, Int_t *colors)
	Creates palette in the same way as TStyle::SetPalette. More...

virtual	~TImagePalette ()
	Destructor. More...

virtual Int_t	FindColor (UShort_t r, UShort_t g, UShort_t b)
	Returns an index of the closest color. More...

virtual Int_t *	GetRootColors ()
	Returns a list of ROOT colors. More...

TImagePalette &	operator= (const TImagePalette &palette)
	Assignment operator. More...

Public Member Functions inherited from TObject
	TObject ()

	TObject (const TObject &object)
	TObject copy ctor. More...

TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...

virtual	~TObject ()
	TObject destructor. More...

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

virtual void	Clear (Option_t *="")

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method. More...

virtual void	Copy (TObject &object) const
	Copy this to obj. More...

virtual void	Delete (Option_t *option="")
	Delete this object. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current pad. More...

virtual void	Dump () const
	Dump contents of object on stdout. More...

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). More...

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual Option_t *	GetOption () const

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

virtual Bool_t	IsSortable () const

Bool_t	IsOnHeap () const

Bool_t	IsZombie () const

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

virtual void	ls (Option_t *option="") const
	The ls function lists the contents of a class on stdout. More...

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...

virtual void	Print (Option_t *option="") const
	This method must be overridden when a class wants to print itself. More...

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename. More...

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out". More...

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

void *	operator new (size_t sz)

void *	operator new[] (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz, void *vp)

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...

void	SetBit (UInt_t f)

void	ResetBit (UInt_t f)

Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

void	InvertBit (UInt_t f)

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message. More...

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message. More...

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

Public Attributes
UInt_t	fNumPoints

Double_t *	fPoints

UShort_t *	fColorRed

UShort_t *	fColorGreen

UShort_t *	fColorBlue

UShort_t *	fColorAlpha

Additional Inherited Members
Public Types inherited from TObject
enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

Protected Member Functions inherited from TObject
void	MakeZombie ()

virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

#include <TAttImage.h>

Inheritance diagram for TImagePalette:

Collaboration diagram for TImagePalette:

Constructor & Destructor Documentation

TImagePalette::TImagePalette ( )

Default constructor, sets all pointers to 0.

Definition at line 270 of file TAttImage.cxx.

TImagePalette::TImagePalette ( const TImagePalette & palette )

Copy constructor.

Definition at line 297 of file TAttImage.cxx.

TImagePalette::TImagePalette ( UInt_t numPoints )

Constructor for a palette with numPoints anchor points.

It allocates the memory but does not set any colors.

Definition at line 284 of file TAttImage.cxx.

TImagePalette::TImagePalette	(	Int_t	ncolors,
		Int_t *	colors
	)

Creates palette in the same way as TStyle::SetPalette.

Definition at line 317 of file TAttImage.cxx.

TImagePalette::~TImagePalette ( )

virtual

Destructor.

Definition at line 441 of file TAttImage.cxx.

Member Function Documentation

Int_t TImagePalette::FindColor	(	UShort_t	r,
		UShort_t	g,
		UShort_t	b
	)

virtual

Returns an index of the closest color.

Definition at line 485 of file TAttImage.cxx.

Referenced by TASImage::GetArray().

Int_t * TImagePalette::GetRootColors ( )

virtual

Returns a list of ROOT colors.

Could be used to set histogram palette. See also TStyle::SetPalette

Definition at line 507 of file TAttImage.cxx.

TImagePalette & TImagePalette::operator= ( const TImagePalette & palette )

Assignment operator.

Definition at line 453 of file TAttImage.cxx.

Member Data Documentation

UShort_t* TImagePalette::fColorAlpha

Definition at line 91 of file TAttImage.h.

Referenced by TASPaletteEditor::InvertPalette(), TASPaletteEditor::NewPalette(), TASPaletteEditor::Open(), operator=(), TASImage::Paint(), TFITSHDU::ReadAsImage(), TAttImage::ResetAttImage(), TASPaletteEditor::Save(), TASImage::SetImage(), TASImage::SetPalette(), TAttImage::SetPalette(), TASPaletteEditor::SetRamp(), TASPaletteEditor::SetStep(), TImagePalette(), TASPaletteEditor::UpdateScreen(), TASImage::Vectorize(), and ~TImagePalette().

UShort_t* TImagePalette::fColorBlue

UShort_t* TImagePalette::fColorGreen

UShort_t* TImagePalette::fColorRed

The documentation for this class was generated from the following files:

graf2d/graf/inc/TAttImage.h
graf2d/graf/src/TAttImage.cxx

Public Member Functions

Public Attributes

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation