#include "TAttImage.h"

TAttImage


class description - source file - inheritance tree (.pdf)

class TAttImage

Inheritance Chart:
TAttImage
<-
TImage
<-
TASImage

    public:
TAttImage() TAttImage(TAttImage::EImageQuality lquality, UInt_t lcompression, Bool_t constRatio) TAttImage(const TAttImage&) virtual ~TAttImage() static TClass* Class() void Copy(TAttImage& attline) const virtual void EditorClosed() Bool_t GetConstRatio() const UInt_t GetImageCompression() const TAttImage::EImageQuality GetImageQuality() const virtual const TImagePalette& GetPalette() const virtual TClass* IsA() const Bool_t IsPaletteEnabled() const TAttImage& operator=(const TAttImage&) virtual void ResetAttImage(Option_t* option = "") virtual void SaveImageAttributes(ofstream& out, const char* name, TAttImage::EImageQuality qualdef = kImgDefault, UInt_t comprdef = 0, Bool_t constRatiodef = kTRUE) virtual void SetConstRatio(Bool_t constRatio = kTRUE) virtual void SetImageCompression(UInt_t lcompression) virtual void SetImageQuality(TAttImage::EImageQuality lquality) virtual void SetPalette(const TImagePalette* palette) virtual void SetPaletteEnabled(Bool_t on = kTRUE) virtual void ShowMembers(TMemberInspector& insp, char* parent) virtual void StartPaletteEditor() virtual void Streamer(TBuffer& b) void StreamerNVirtual(TBuffer& b)

Data Members


    protected:
TAttImage::EImageQuality fImageQuality *OPTION={GetMethod="GetImageQuality";SetMethod="SetImageQuality";Items=(kImgDefault="Default",kImgPoor="Poor",kImgFast="Fast",kImgGood="Good",kImgBest="Best")}* UInt_t fImageCompression compression [0 .. 100] 0: no compression Bool_t fConstRatio keep aspect ratio of image on the screen TImagePalette fPalette color palette for value -> color conversion TPaletteEditor* fPaletteEditor ! GUI to edit the color palette Bool_t fPaletteEnabled ! kTRUE - palette is drawn on the image public:
static const TAttImage::EImageQuality kImgDefault static const TAttImage::EImageQuality kImgPoor static const TAttImage::EImageQuality kImgFast static const TAttImage::EImageQuality kImgGood static const TAttImage::EImageQuality kImgBest

Class Description

                                                                      
  TAttImage                                                           
                                                                      
  Image attributes are:                                               
    Image Quality (see EImageQuality for the list of qualities)       
    Compression defines the compression rate of the color data in the 
                internal image structure. Speed and memory depends    
                on this rate, but not the image display itself        
                0: no compression;  100: max compression              
    Radio Flag: kTRUE  the x/y radio of the displayed image is always 
                       identical to the original image                
                kFALSE the x and y size of the displayed image depends
                       on the size of the pad                         
    Palette:    Defines the conversion from a pixel value to the      
                screen color                                          
                                                                      
  This class is used (in general by secondary inheritance)            
  by some other classes (image display).                              
                                                                      
                                                                      
  TImagePalette                                                       
                                                                      
  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 predifined palettes:                                 
                                                                      
    o gHistImagePalette - palette used in TH2::Draw("col")            
                                                                      
    o 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 convertion of images into     
       2-D histograms.                                                
                                                                      
                                                                      
  TPaletteEditor                                                      
                                                                      
  This class provides a way to edit the palette via a GUI.            
                                                                      


TAttImage()
 TAttImage default constructor.
 Calls ResetAttImage to set the attributes to a default state.

TAttImage(EImageQuality lquality, UInt_t lcompression, Bool_t constRatio)
 TAttImage normal constructor.
 Image attributes are taken from the argument list
    qualtity     : must be one of EImageQuality (kImgDefault is same as
                   kImgGood in the current implementation)
    lcompression : defines the compression rate of the color data in the
                   image. Speed and memory depends on this rate, but not
                   the image display itself
                   0: no compression;  100: max compression
    constRatio   : keeps the aspect ratio of the image constant on the
                   screen (in pixel units)

~TAttImage()
 TAttImage destructor.

void Copy(TAttImage &attimage) const
 Copy this image attributes to a new attimage.

void ResetAttImage(Option_t *)
 Reset this image attributes to default values.
 Default values are:
    quality:     kImgPoor, (no smoothing while the image is zoomed)
    compression: 0 (no compression)
    constRatio:  kTRUE
    palette:     a default rainbow palette

void SaveImageAttributes(ofstream &out, const char *name, EImageQuality qualdef, UInt_t comprdef, Bool_t constRatiodef)
 Save image attributes as C++ statement(s) on output stream, but
 not the palette.

void SetConstRatio(Bool_t constRatio)
 Set (constRatio = kTRUE) or unset (constRadio = kFALSE) the ratio flag.
 The aspect ratio of the image on the screen is constant if the ratio
 flag is set. That means one image pixel is allways a square on the screen
 independent of the pad size and of the size of the zoomed area.

void SetPalette(const TImagePalette *palette)
 Set a new palette for the image. If palette == 0 a default
 rainbow color palette is used.

void StartPaletteEditor()
 Opens a GUI to edit the color palette.



Inline Functions


                          Bool_t GetConstRatio() const
                          UInt_t GetImageCompression() const
        TAttImage::EImageQuality GetImageQuality() const
            const TImagePalette& GetPalette() const
                            void SetPaletteEnabled(Bool_t on = kTRUE)
                            void SetImageCompression(UInt_t lcompression)
                            void SetImageQuality(TAttImage::EImageQuality lquality)
                            void EditorClosed()
                          Bool_t IsPaletteEnabled() const
                         TClass* Class()
                         TClass* IsA() const
                            void ShowMembers(TMemberInspector& insp, char* parent)
                            void Streamer(TBuffer& b)
                            void StreamerNVirtual(TBuffer& b)
                       TAttImage TAttImage(const TAttImage&)
                      TAttImage& operator=(const TAttImage&)


Author: Reiner Rohlfs 24/03/02
Last update: root/graf:$Name: $:$Id: TAttImage.cxx,v 1.9 2005/09/02 10:20:45 brun Exp $
Copyright (C) 2001-2001, Rene Brun, Fons Rademakers and Reiner Rohlfs *


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