Color.cpp

#include "DGtal/io/Color.h"

using namespace std;

// class Color


// Standard services - public :


DGtal::Color::Color( const unsigned int rgb, unsigned char aAlphaValue )
 :myAlpha( aAlphaValue )
{
  myRed = ( rgb & 0xFF0000u ) >> 16;
  myGreen = ( rgb & 0xFF00u ) >> 8;
  myBlue = rgb & 0xFF;
}


Color &
DGtal::Color::setRGBf( float aRedValue,
           float aGreenValue,
           float aBlueValue,
           float aAlphaValue  ) {
  if ( aRedValue > 1.0f ) aRedValue = 1.0f;
  if ( aRedValue < 0.0f ) aRedValue = 0.0f;
  myRed = static_cast<unsigned char>( 255 * aRedValue );
  if ( aGreenValue > 1.0f ) aGreenValue = 1.0f;
  if ( aGreenValue < 0.0f ) aGreenValue = 0.0f;
  myGreen = static_cast<unsigned char>( 255 * aGreenValue );
  if ( aBlueValue > 1.0f ) aBlueValue = 1.0f;
  if ( aBlueValue < 0.0f ) aBlueValue = 0.0f;
  myBlue = static_cast<unsigned char>( 255 * aBlueValue );
  if ( aAlphaValue > 1.0f ) aAlphaValue = 1.0f;
  if ( aAlphaValue < 0.0f ) aAlphaValue = 0.0f;
  myAlpha = static_cast<unsigned char>( 255 * aAlphaValue );
  return *this;
}



bool
DGtal::Color::operator==( const Color & aColor ) const
{
  return myRed == aColor.myRed 
    && myGreen == aColor.myGreen
    && myBlue == aColor.myBlue
    && myAlpha == aColor.myAlpha;
}

bool
DGtal::Color::operator!=( const Color & aColor ) const
{
  return myRed != aColor.myRed  
    || myGreen != aColor.myGreen
    || myBlue != aColor.myBlue
    || myAlpha != aColor.myAlpha;
}

bool
DGtal::Color::operator<( const Color & aColor ) const
{
  if ( myRed < aColor.myRed )
    return true;
  if ( myRed == aColor.myRed ) {
    if ( myGreen < aColor.myGreen )
      return true;
    if ( myGreen == aColor.myGreen ) { 
      if ( myBlue < aColor.myBlue )
  return true;
      if ( myBlue == aColor.myBlue )
  return myAlpha < aColor.myAlpha;
    }
  }
  return false;
}


void
DGtal::Color::flushPostscript( std::ostream & stream ) const
{
  stream << ((double)myRed/255.0) << " "
   << ((double)myGreen/255.0) << " "
   << ((double)myBlue/255.0) << " srgb\n";
}

string
DGtal::Color::postscript() const
{
  char buffer[255];
  secured_sprintf( buffer, 255, "%.4f %.4f %.4f", myRed/255.0, myGreen/255.0, myBlue/255.0 );
  return buffer;
}

string
DGtal::Color::svg() const
{
  char buffer[255];
  if ( *this == DGtal::Color::None ) return "none";
  secured_sprintf( buffer, 255, "rgb(%d,%d,%d)",myRed, myGreen, myBlue );
  return buffer;
}

string
DGtal::Color::svgAlpha( const char * prefix ) const
{
  char buffer[255];
  if ( myAlpha == 255 || *this == DGtal::Color::None ) return "";
  secured_sprintf( buffer, 255, " %s-opacity=\"%f\"", prefix, myAlpha/255.0f );
  return buffer;
}

string
DGtal::Color::tikz() const
{
  // see tex/generic/pgf/utilities/pgfutil-plain.def for color definitions
  char buffer[255];
  if ( *this == DGtal::Color::None ) return "none";
  if ( *this == DGtal::Color::Black ) return "black";
  if ( *this == DGtal::Color::Gray ) return "gray";
  if ( *this == DGtal::Color::White ) return "white";
  if ( *this == DGtal::Color::Red ) return "red";
  if ( *this == DGtal::Color::Green ) return "green!50!black";
  if ( *this == DGtal::Color::Lime ) return "green";
  if ( *this == DGtal::Color::Blue ) return "blue";
//  if ( *this == DGtal::Color::Cyan ) return "cyan";
//  if ( *this == DGtal::Color::Magenta ) return "magenta";
//  if ( *this == DGtal::Color::Yellow ) return "yellow";
  if ( *this == DGtal::Color::Silver ) return "white!75!black";
  if ( *this == DGtal::Color::Purple ) return "gray"; // ???: Is Color::Purple meant to be equal to Color::Gray?
  if ( *this == DGtal::Color::Navy ) return "blue!50!black";
//  if ( *this == DGtal::Color::Aqua ) return "cyan"; // ???: Is Color::Aqua meant to be equal to Color::Cyan?
  secured_sprintf( buffer, 255, "{rgb,255:red,%d;green,%d;blue,%d}", myRed, myGreen, myBlue );
  return buffer;
}



DGtal::Color::~Color()
{
}



// Interface - public :

const Color DGtal::Color::None(false);
const Color DGtal::Color::Black((unsigned char)0,(unsigned char)0,(unsigned char)0);
const Color DGtal::Color::Gray((unsigned char)128,(unsigned char)128,(unsigned char)128);
const Color DGtal::Color::White((unsigned char)255,(unsigned char)255,(unsigned char)255);
const Color DGtal::Color::Red((unsigned char)255,(unsigned char)0,(unsigned char)0);
const Color DGtal::Color::Green((unsigned char)0,(unsigned char)128,(unsigned char)0);
const Color DGtal::Color::Lime((unsigned char)0,(unsigned char)255,(unsigned char)0);
const Color DGtal::Color::Blue((unsigned char)0,(unsigned char)0,(unsigned char)255);
const Color DGtal::Color::Cyan((unsigned char)0,(unsigned char)255,(unsigned char)255);
const Color DGtal::Color::Magenta((unsigned char)255,(unsigned char)0,(unsigned char)255);
const Color DGtal::Color::Yellow((unsigned char)255,(unsigned char)255,(unsigned char)0);
const Color DGtal::Color::Silver((unsigned char)190,(unsigned char)190,(unsigned char)190);
const Color DGtal::Color::Purple((unsigned char)128,(unsigned char)128,(unsigned char)128);
const Color DGtal::Color::Navy((unsigned char)0,(unsigned char)0,(unsigned char)128);
const Color DGtal::Color::Aqua((unsigned char)0,(unsigned char)255,(unsigned char)255);


void
DGtal::Color::selfDisplay ( std::ostream & out ) const
{
    out << "[Color]";
}

bool
DGtal::Color::isValid() const
{
    return true;
}



// Internals - private :

//                                                                           //