DGtal::Color Class Reference

Structure representing an RGB triple with alpha component. More...

#include <DGtal/io/Color.h>

Public Member Functions
	~Color ()=default
	Color (const unsigned int aRgb, unsigned char aAlpha=255)
	Color (const Color &aColor)=default
	Color (const unsigned char aRedValue, const unsigned char aGreenValue, const unsigned char aBlueValue, const unsigned char aAlphaValue=255)
	Color (unsigned char aGrayValue, unsigned char aAlphaValue=255)
	Color ()
void	red (const unsigned char aRedValue)
void	green (const unsigned char aGreenValue)
void	blue (const unsigned char aBlueValue)
void	alpha (const unsigned char aAlphaValue)
unsigned char	red () const
unsigned char	green () const
unsigned char	blue () const
unsigned char	alpha () const
double	r () const
double	g () const
double	b () const
double	a () const
Color &	setRGBi (const unsigned char aRedValue, const unsigned char aGreenValue, const unsigned char aBlueValue, const unsigned char aAlphaValue=255)
Color &	setRGBA (DGtal::uint32_t aRGBA)
Color &	setFromHSV (const double h, const double s, const double v)
std::array< double, 3 >	getHSV () const
DGtal::uint32_t	getRGB () const
DGtal::uint32_t	getRGBA () const
bool	valid () const
void	selfDisplay (std::ostream &out) const
bool	isValid () const
Color &	setRGBf (float red, float green, float blue, float alpha=1.0)
bool	operator== (const Color &aColor) const
bool	operator!= (const Color &aColor) const
bool	operator< (const Color &aColor) const
bool	operator> (const Color &aColor) const
bool	operator<= (const Color &aColor) const
bool	operator>= (const Color &aColor) const
Color &	operator+= (const Color &v)
Color	operator+ (const Color &v) const
Color &	operator-= (const Color &v)
Color	operator- (const Color &v) const
Color &	operator*= (const double coeff)
Color	operator* (const double coeff) const
Color &	operator= (const Color &pv)=default
void	flushPostscript (std::ostream &) const
std::string	svg () const
std::string	svgAlpha (const char *aPrefix) const
std::string	postscript () const
std::string	tikz () const

Static Public Member Functions
static void	HSVtoRGB (double &r, double &g, double &b, double h, const double s, const double v)
static void	RGBtoHSV (double &h, double &s, double &v, const unsigned char r, const unsigned char g, const unsigned char b)

Static Public Attributes
static const Color	None
static const Color	Black
static const Color	Gray
static const Color	White
static const Color	Red
static const Color	Green
static const Color	Lime
static const Color	Blue
static const Color	Cyan
static const Color	Magenta
static const Color	Yellow
static const Color	Silver
static const Color	Purple
static const Color	Navy
static const Color	Aqua

Private Member Functions
unsigned char	clamp (const double value) const

Private Attributes
unsigned char	myRed
unsigned char	myGreen
unsigned char	myBlue
unsigned char	myAlpha

Detailed Description

Structure representing an RGB triple with alpha component.

Description of class 'Color'

Note

if compilation flag COLOR_WITH_ALPHA_ARITH is set, then the arithmetical operations on colors also consider the alpha-channel. Otherwise, the alpha channel is not changed when summing up to colors for instance.

Examples

dec/exampleDiscreteExteriorCalculusSolve.cpp, examples/tutorial-examples/polyhedralizer.cpp, geometry/curves/exampleAlphaThickSegment.cpp, geometry/curves/exampleAlphaThickSegmentTgtCover.cpp, geometry/curves/exampleArithmeticalDSS.cpp, geometry/curves/exampleGridCurve3d-2.cpp, geometry/curves/exampleRationalConvexity.cpp, geometry/meshes/curvature-comparator-ii-cnc-3d.cpp, geometry/meshes/curvature-measures-icnc-3d.cpp, geometry/meshes/curvature-measures-icnc-XY-3d.cpp, geometry/meshes/curvature-measures-nc-3d.cpp, geometry/meshes/curvature-measures-nc-XY-3d.cpp, geometry/meshes/digpoly-curvature-measures-cnc-3d.cpp, geometry/meshes/digpoly-curvature-measures-cnc-XY-3d.cpp, geometry/meshes/obj-curvature-measures-icnc-3d.cpp, geometry/meshes/obj-curvature-measures-icnc-XY-3d.cpp, geometry/meshes/vol-curvature-measures-icnc-3d.cpp, geometry/meshes/vol-curvature-measures-icnc-XY-3d.cpp, geometry/surfaces/dvcm-3d.cpp, geometry/surfaces/greedy-plane-segmentation-ex2.cpp, geometry/surfaces/greedy-plane-segmentation.cpp, geometry/volumes/digitalPolyhedronBuilder3D.cpp, geometry/volumes/distance/distancetransform3D.cpp, geometry/volumes/distance/exampleFMM3D.cpp, geometry/volumes/distance/voronoimap2D.cpp, geometry/volumes/dvcm-2d.cpp, geometry/volumes/fullConvexityAnalysis3D.cpp, geometry/volumes/fullConvexityCollapsiblePoints2D.cpp, geometry/volumes/fullConvexityLUT2D.cpp, geometry/volumes/fullConvexityShortestPaths3D.cpp, geometry/volumes/fullConvexityThinning3D.cpp, geometry/volumes/standardDigitalPolyhedronBuilder3D.cpp, graph/graphTraversal.cpp, graph/volDistanceTraversal.cpp, io/boards/dgtalBoard2D-3-custom-classes.cpp, io/boards/dgtalBoard2D-3-custom-points.cpp, io/boards/dgtalBoard2D-4-colormaps.cpp, io/boards/dgtalBoard3D-1-points.cpp, io/boards/dgtalBoard3D-6-clipping.cpp, io/boards/dgtalBoard3DTo2D-3-objects.cpp, io/boards/dgtalBoard3DTo2D-5-custom.cpp, io/boards/dgtalBoard3DTo2D-6.cpp, io/boards/logoDGtal.cpp, io/digitalSetFromPointList.cpp, io/meshFromOFF.cpp, io/viewDualSurface.cpp, io/viewers/viewer3D-3-objects.cpp, io/viewers/viewer3D-5-custom.cpp, io/viewers/viewer3D-6-clipping.cpp, io/viewers/viewer3D-7-planes.cpp, io/viewers/viewer3D-7-stdplane.cpp, io/viewers/viewer3D-7bis-planes.cpp, io/viewers/viewer3D-7bis-stdplane.cpp, io/viewers/viewer3D-8-2DSliceImages.cpp, io/viewers/viewer3D-9-3Dimages.cpp, shapes/exampleEuclideanShapesDecorator.cpp, shapes/mesh3DConstructionAndVisualisation.cpp, shapes/viewMarchingCubes.cpp, shapes/viewPolygonalMarchingCubes.cpp, topology/3dBorderExtraction.cpp, topology/3dKSSurfaceExtraction.cpp, topology/ctopo-1.cpp, topology/ctopo-2-3d.cpp, topology/ctopo-2.cpp, topology/ctopo-fillContours.cpp, topology/cubical-complex-illustrations.cpp, topology/digitalSetToCubicalComplexes2D.cpp, topology/digitalSurfaceSlice.cpp, topology/frontierAndBoundary.cpp, topology/generateSimplicityTables2D.cpp, topology/homotopicThinning3D.cpp, topology/khalimskySpaceScanner.cpp, topology/volBreadthFirstTraversal.cpp, topology/volScanBoundary.cpp, topology/volTrackBoundary.cpp, tutorial-examples/freemanChainFromImage.cpp, tutorial-examples/polyhedralizer.cpp, and tutorial-examples/volDTGranulo.cpp.

Definition at line 67 of file Color.h.

Constructor & Destructor Documentation

~Color()

DGtal::Color::~Color ( )

default

Destructor.

Color() [1/5]

DGtal::Color::Color	(	const unsigned int	aRgb,
		unsigned char	aAlpha = 255
	)

Constructor.

Parameters

aRgb	an unsigned int representing the color.
aAlpha	color transparency (default value =255);

Definition at line 44 of file Color.cpp.

 :myAlpha( aAlphaValue )
{
  myRed = ( rgb & 0xFF0000u ) >> 16;
  myGreen = ( rgb & 0xFF00u ) >> 8;
  myBlue = rgb & 0xFF;
}

References myBlue, myGreen, and myRed.

Color() [2/5]

DGtal::Color::Color ( const Color &  aColor )

default

Copy Constructor.

Parameters

aColor

the color to copy.

Color() [3/5]

DGtal::Color::Color ( const unsigned char  aRedValue, const unsigned char  aGreenValue, const unsigned char  aBlueValue, const unsigned char  aAlphaValue = 255  )

inline

Constructor from R, G, B and Alpha parameter.

Parameters

aRedValue	red component
aGreenValue	green component
aBlueValue	blue component
aAlphaValue	color transparency.

Definition at line 106 of file Color.h.

      : myRed(aRedValue),myGreen(aGreenValue),myBlue(aBlueValue),myAlpha(aAlphaValue) { }

Color() [4/5]

DGtal::Color::Color ( unsigned char  aGrayValue, unsigned char  aAlphaValue = 255  )

inline

Constructor from gray scale value.

Parameters

aGrayValue	the color gray value.
aAlphaValue	color transparency (default value =255);.

Definition at line 120 of file Color.h.

      : myRed(aGrayValue),myGreen(aGrayValue), myBlue(aGrayValue), myAlpha(aAlphaValue) { }

Color() [5/5]

DGtal::Color::Color ( )

inline

Default Constructor.

Definition at line 130 of file Color.h.

      : myRed(0),myGreen(0),myBlue(0), myAlpha(255)
    {
    }

Member Function Documentation

a()

double DGtal::Color::a

(

)

const

alpha() [1/2]

unsigned char DGtal::Color::alpha

(

)

const

alpha() [2/2]

void DGtal::Color::alpha

(

const unsigned char

aAlphaValue

)

b()

double DGtal::Color::b

(

)

const

Referenced by getHSV(), and setFromHSV().

blue() [1/2]

unsigned char DGtal::Color::blue

(

)

const

blue() [2/2]

void DGtal::Color::blue

(

const unsigned char

aBlueValue

)

Examples

io/viewers/viewer3D-8-2DSliceImages.cpp, io/viewers/viewer3D-9-3Dimages.cpp, topology/3dKSSurfaceExtraction.cpp, topology/ctopo-2-3d.cpp, and topology/digitalSurfaceSlice.cpp.

Referenced by LibBoard::Board::fillGouraudTriangle(), LibBoard::Dot::flushCairo(), LibBoard::Line::flushCairo(), LibBoard::Arrow::flushCairo(), LibBoard::Polyline::flushCairo(), LibBoard::Rectangle::flushCairo(), LibBoard::QuadraticBezierCurve::flushCairo(), LibBoard::Ellipse::flushCairo(), LibBoard::Circle::flushCairo(), LibBoard::Arc::flushCairo(), LibBoard::GouraudTriangle::flushFIG(), LibBoard::GouraudTriangle::flushPostscript(), LibBoard::GouraudTriangle::flushSVG(), DGtal::Viewer3D< TSpace, TKSpace >::GLTextureImage::GLTextureImage(), LibBoard::GouraudTriangle::GouraudTriangle(), main(), DGtal::functors::BlueChannel::operator()(), DGtal::functors::MeanChannels::operator()(), and testGrayscaleColorMap().

clamp()

unsigned char DGtal::Color::clamp ( const double  value ) const

inlineprivate

Clamp an int to [0,255]

Parameters

[in]

value

the value to clamp

Returns

the clamped value

Definition at line 450 of file Color.h.

    {
      return static_cast<unsigned char>(std::max( std::min(value, 255.0), 0.0));
    }

flushPostscript()

void DGtal::Color::flushPostscript

(

std::ostream &

stream

)

const

Definition at line 142 of file Color.cpp.

{
  stream << ((double)myRed/255.0) << " "
   << ((double)myGreen/255.0) << " "
   << ((double)myBlue/255.0) << " srgb\n";
}

Referenced by LibBoard::Polyline::flushPostscript(), LibBoard::QuadraticBezierCurve::flushPostscript(), and LibBoard::Arc::flushPostscript().

g()

double DGtal::Color::g

(

)

const

Referenced by getHSV(), and setFromHSV().

getHSV()

std::array< double, 3 > DGtal::Color::getHSV ( ) const

inline

Returns

the HSV values of a DGtal::Color (array of three doubles).

Definition at line 192 of file Color.h.

    {
      double h,s,v;
      Color::RGBtoHSV(h,s,v, this->r(), this->g(), this->b());
      return {h,s,v};
    }

References b(), g(), r(), and RGBtoHSV().

getRGB()

DGtal::uint32_t DGtal::Color::getRGB

(

)

const

Returns

the unsigned integer ( DGtal::uint32_t ) coding each R, G, B canal on 8 bits starting from least significant bit.

Referenced by DGtal::functors::ColorRGBEncoder< TValue >::operator()().

getRGBA()

DGtal::uint32_t DGtal::Color::getRGBA

(

)

const

Returns

the unsigned integer ( DGtal::uint32_t ) coding each R, G, B, A canal on 8 bits starting from least significant bit.

green() [1/2]

unsigned char DGtal::Color::green

(

)

const

green() [2/2]

void DGtal::Color::green

(

const unsigned char

aGreenValue

)

Examples

io/viewers/viewer3D-8-2DSliceImages.cpp, io/viewers/viewer3D-9-3Dimages.cpp, topology/3dKSSurfaceExtraction.cpp, topology/ctopo-2-3d.cpp, and topology/digitalSurfaceSlice.cpp.

Referenced by LibBoard::Board::fillGouraudTriangle(), LibBoard::Dot::flushCairo(), LibBoard::Line::flushCairo(), LibBoard::Arrow::flushCairo(), LibBoard::Polyline::flushCairo(), LibBoard::Rectangle::flushCairo(), LibBoard::QuadraticBezierCurve::flushCairo(), LibBoard::Ellipse::flushCairo(), LibBoard::Circle::flushCairo(), LibBoard::Arc::flushCairo(), LibBoard::GouraudTriangle::flushFIG(), LibBoard::GouraudTriangle::flushPostscript(), LibBoard::GouraudTriangle::flushSVG(), DGtal::Viewer3D< TSpace, TKSpace >::GLTextureImage::GLTextureImage(), LibBoard::GouraudTriangle::GouraudTriangle(), main(), DGtal::functors::GreenChannel::operator()(), DGtal::functors::MeanChannels::operator()(), and testGrayscaleColorMap().

HSVtoRGB()

static void DGtal::Color::HSVtoRGB ( double &  r, double &  g, double &  b, double  h, const double  s, const double  v  )

static

Converts a color from the HSV (Hue,Saturation,Value) space to the RGB space.

Parameters

r	The red component (out).
g	The green component (out).
b	The blue component (out).
h	The hue of the color in [0..360)
s	The saturation of the color in [0..1].
v	The value of the color in [0..1].

Referenced by setFromHSV().

isValid()

bool DGtal::Color::isValid

(

)

const

Checks the validity/consistency of the object.

Returns

'true' if the object is valid, 'false' otherwise.

Definition at line 235 of file Color.cpp.

{
    return true;
}

operator!=()

bool DGtal::Color::operator!=

(

const Color &

aColor

)

const

Definition at line 96 of file Color.cpp.

{
  return myRed != aColor.myRed
    || myGreen != aColor.myGreen
    || myBlue != aColor.myBlue
    || myAlpha != aColor.myAlpha;
}

References myAlpha, myBlue, myGreen, and myRed.

operator*()

Color DGtal::Color::operator* ( const double  coeff ) const

inline

Multiplication by a scalar (component-wise)

Note

returned components are clamped to [0,255] interval.

Parameters

coeff

the scalar.

Returns

a scaled color

Definition at line 364 of file Color.h.

    {
      Color c;
      c.myRed = clamp((double)this->myRed*coeff);
      c.myBlue = clamp((double)this->myBlue*coeff);
      c.myGreen = clamp((double)this->myGreen*coeff);
#ifdef COLOR_WITH_ALPHA_ARITH
      c.myAlpha =  clamp((double)this->myAlpha*coeff);
#else
      c.myAlpha  = this->myAlpha;
#endif
      return c;
    }

References myAlpha, myBlue, myGreen, and myRed.

operator*=()

Color & DGtal::Color::operator*= ( const double  coeff )

inline

Multiplication by a scalar (component-wise)

Note

returned components are clamped to [0,255] interval.

Parameters

coeff

the scalar

Returns

the scaled color

Definition at line 345 of file Color.h.

    {
      this->myRed = clamp((double)this->myRed*coeff);
      this->myBlue = clamp((double)this->myBlue*coeff);
      this->myGreen = clamp((double)this->myGreen*coeff);
#ifdef COLOR_WITH_ALPHA_ARITH
      this->myAlpha =  clamp((double)this->myAlpha*coeff);
#endif
      return *this;
    }

References myAlpha, myBlue, myGreen, and myRed.

operator+()

Color DGtal::Color::operator+ ( const Color &  v ) const

inline

Addition operator.

Note

returned components are clamped to [0,255] interval.

Parameters

v	is the Color that gets added to *this.

Returns

a new Point that is the addition of 'this' to [v].

Definition at line 279 of file Color.h.

    {
      Color c;
      c.myRed = clamp((int)this->myRed + (int)v.myRed);
      c.myBlue =clamp((int)this->myBlue + (int)v.myBlue);
      c.myGreen = clamp((int)this->myGreen + (int)v.myGreen);
#ifdef COLOR_WITH_ALPHA_ARITH
      c.myAlpha = clamp((int)this->myAlpha + (int)v.myAlpha);
#else
      c.myAlpha = this->myAlpha ;
#endif
  return c;
    }

References myAlpha, myBlue, myGreen, and myRed.

operator+=()

Color & DGtal::Color::operator+= ( const Color &  v )

inline

Addition operator with assignement.

Note

returned components are clamped to [0,255] interval.

Parameters

v	is the Color that gets added to *this.

Returns

a reference on 'this'.

Definition at line 259 of file Color.h.

    {
      this->myRed = clamp((int)this->myRed + (int)v.myRed);
      this->myBlue =  clamp((int)this->myBlue + (int)v.myBlue);
      this->myGreen =  clamp((int)this->myGreen + (int)v.myGreen);
#ifdef COLOR_WITH_ALPHA_ARITH
      this->myAlpha =  clamp((int)this->myAlpha + (int)v.myAlpha);
#endif
      return *this;
    }

References myAlpha, myBlue, myGreen, and myRed.

operator-()

Color DGtal::Color::operator- ( const Color &  v ) const

inline

Substraction operator.

Note

returned components are clamped to [0,255] interval.

Parameters

v	is the Color that gets substacted to *this.

Returns

a new Point that is the subtraction 'this'-[v].

Definition at line 321 of file Color.h.

    {
      Color c;
      c.myRed = clamp((int)this->myRed - (int)v.myRed);
      c.myBlue = clamp((int)this->myBlue - (int)v.myBlue);
      c.myGreen = clamp((int)this->myGreen - (int)v.myGreen);
#ifdef COLOR_WITH_ALPHA_ARITH
      c.myAlpha = clamp((int)this->myAlpha - (int)v.myAlpha);
#else
      c.myAlpha = this->myAlpha ;
#endif
      return c;
    }

References myAlpha, myBlue, myGreen, and myRed.

operator-=()

Color & DGtal::Color::operator-= ( const Color &  v )

inline

Substraction operator with assignement.

Note

returned components are clamped to [0,255] interval.

Parameters

v	is the Point that gets substracted to *this.

Returns

a reference on 'this'.

Definition at line 302 of file Color.h.

    {
      this->myRed = clamp((int)this->myRed - (int)v.myRed);
      this->myBlue = clamp((int)this->myBlue - (int)v.myBlue);
      this->myGreen = clamp((int)this->myGreen - (int)v.myGreen);
#ifdef COLOR_WITH_ALPHA_ARITH
      this->myAlpha = clamp((int)this->myAlpha - (int)v.myAlpha);
#endif
      return *this;
    }

References myAlpha, myBlue, myGreen, and myRed.

operator<()

bool DGtal::Color::operator<

(

const Color &

aColor

)

const

Definition at line 104 of file Color.cpp.

{
  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;
}

References myAlpha, myBlue, myGreen, and myRed.

operator<=()

bool DGtal::Color::operator<=

(

const Color &

aColor

)

const

Definition at line 128 of file Color.cpp.

{
  return this->operator<(aColor) || this->operator==(aColor);
}

References DGtal::operator<(), and DGtal::operator==().

operator=()

Color & DGtal::Color::operator= ( const Color &  pv )

default

Assignement Operator

Parameters

pv	the object to copy.

Returns

a reference on 'this'.

operator==()

bool DGtal::Color::operator==

(

const Color &

aColor

)

const

Definition at line 87 of file Color.cpp.

{
  return myRed == aColor.myRed
    && myGreen == aColor.myGreen
    && myBlue == aColor.myBlue
    && myAlpha == aColor.myAlpha;
}

References myAlpha, myBlue, myGreen, and myRed.

operator>()

bool DGtal::Color::operator>

(

const Color &

aColor

)

const

Definition at line 123 of file Color.cpp.

{
  return !this->operator<(aColor);
}

References DGtal::operator<().

operator>=()

bool DGtal::Color::operator>=

(

const Color &

aColor

)

const

Definition at line 135 of file Color.cpp.

{
  return this->operator>(aColor) || this->operator==(aColor);
}

References DGtal::operator==(), and DGtal::operator>().

postscript()

string DGtal::Color::postscript

(

)

const

Definition at line 150 of file Color.cpp.

{
  char buffer[255];
  secured_sprintf( buffer, 255, "%.4f %.4f %.4f", myRed/255.0, myGreen/255.0, myBlue/255.0 );
  return buffer;
}

Referenced by LibBoard::Dot::flushPostscript(), LibBoard::Line::flushPostscript(), LibBoard::Arrow::flushPostscript(), LibBoard::Ellipse::flushPostscript(), LibBoard::Arc::flushPostscript(), and LibBoard::Text::flushPostscript().

r()

double DGtal::Color::r

(

)

const

Referenced by getHSV(), and setFromHSV().

red() [1/2]

unsigned char DGtal::Color::red

(

)

const

red() [2/2]

void DGtal::Color::red

(

const unsigned char

aRedValue

)

Examples

io/viewers/viewer3D-8-2DSliceImages.cpp, io/viewers/viewer3D-9-3Dimages.cpp, topology/3dKSSurfaceExtraction.cpp, topology/ctopo-2-3d.cpp, and topology/digitalSurfaceSlice.cpp.

Referenced by LibBoard::Board::fillGouraudTriangle(), LibBoard::Dot::flushCairo(), LibBoard::Line::flushCairo(), LibBoard::Arrow::flushCairo(), LibBoard::Polyline::flushCairo(), LibBoard::Rectangle::flushCairo(), LibBoard::QuadraticBezierCurve::flushCairo(), LibBoard::Ellipse::flushCairo(), LibBoard::Circle::flushCairo(), LibBoard::Arc::flushCairo(), LibBoard::GouraudTriangle::flushFIG(), LibBoard::GouraudTriangle::flushPostscript(), LibBoard::GouraudTriangle::flushSVG(), DGtal::Viewer3D< TSpace, TKSpace >::GLTextureImage::GLTextureImage(), LibBoard::GouraudTriangle::GouraudTriangle(), main(), DGtal::functors::RedChannel::operator()(), DGtal::functors::MeanChannels::operator()(), and testGrayscaleColorMap().

RGBtoHSV()

static void DGtal::Color::RGBtoHSV ( double &  h, double &  s, double &  v, const unsigned char  r, const unsigned char  g, const unsigned char  b  )

static

Converts a color from the RGB space to the HSV (Hue,Saturation,Value) space.

Parameters

h	(out) The hue of the color in [0..360)
s	(out) The saturation of the color in [0..1].
v	(out) The value of the color in [0..1].
r	The red component.
g	The green component.
b	The blue component.

Referenced by getHSV().

selfDisplay()

void DGtal::Color::selfDisplay

(

std::ostream &

out

)

const

Writes/Displays the object on an output stream.

Parameters

out	the output stream where the object is written.

Definition at line 225 of file Color.cpp.

{
  out << "[Color] RGBA("<<(int)myRed<<","<<(int)myGreen<<","<<(int)myBlue<<","<<(int)myAlpha<<")";
}

setFromHSV()

Color & DGtal::Color::setFromHSV ( const double  h, const double  s, const double  v  )

inline

Set the color from HSV values

Parameters

h	hue
s	saturation
v	value

Returns

the color

Definition at line 184 of file Color.h.

    {
      double r,g,b;
      Color::HSVtoRGB(r,g,b,h,s,v);
      return this->setRGBf((float)r,(float)g,(float)b);
    }

References b(), g(), HSVtoRGB(), r(), and setRGBf().

setRGBA()

DGtal::Color & DGtal::Color::setRGBA

(

DGtal::uint32_t

aRGBA

)

Set the color parameter from an unsigned integer coding each canal.

Parameters

aRGBA

an unsigned integer on 32 bits(DGtal::unit32_t) representing the color coded with 4 bits on each components R, G, B and Alpha value.

Returns

a reference on the itself.

Definition at line 54 of file Color.cpp.

{
  myRed = ( aRGBA & 0xFF000000u ) >> 24;
  myGreen = ( aRGBA & 0xFF0000u ) >> 16;
  myBlue = ( aRGBA & 0xFF00u ) >> 8;
  myAlpha = aRGBA & 0xFF;
  return *this;
}

setRGBf()

DGtal::Color & DGtal::Color::setRGBf	(	float	red,
		float	green,
		float	blue,
		float	alpha = 1.0
	)

Definition at line 65 of file Color.cpp.

                                {
  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;
}

Referenced by LibBoard::Board::setFillColorRGBf(), setFromHSV(), and LibBoard::Board::setPenColorRGBf().

setRGBi()

Color & DGtal::Color::setRGBi	(	const unsigned char	aRedValue,
		const unsigned char	aGreenValue,
		const unsigned char	aBlueValue,
		const unsigned char	aAlphaValue = 255
	)

Referenced by LibBoard::Board::setFillColorRGBi(), LibBoard::Board::setPenColorRGBi(), and testColor().

svg()

string DGtal::Color::svg

(

)

const

Definition at line 158 of file Color.cpp.

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

References None.

Referenced by LibBoard::Arrow::flushSVG(), LibBoard::Text::flushSVG(), and LibBoard::Shape::svgProperties().

svgAlpha()

string DGtal::Color::svgAlpha

(

const char *

aPrefix

)

const

Return a an SVG parameter string for the opacity value.

Parameters

aPrefix

A prefix string to be appended to the returned string if not empty.

Returns

An empty string if alpha == 255, otherwise the string <prefix>-opacity="<alpha-value>".

Definition at line 167 of file Color.cpp.

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

References None.

Referenced by LibBoard::Arrow::flushSVG(), LibBoard::Text::flushSVG(), and LibBoard::Shape::svgProperties().

tikz()

string DGtal::Color::tikz

(

)

const

Return a string representation of the color usable in TikZ commands. Use the corresponding named color (or a mixture of a named color and black) for predefined colors. Use a mixture of red, green and blue for general colors.

Returns

a string representation of the color usable in TikZ commands.

Definition at line 176 of file Color.cpp.

{
  // 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 "purple"; 
  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;
}

References Black, Blue, Gray, Green, Lime, Navy, None, Purple, Red, Silver, and White.

Referenced by LibBoard::Shape::tikzProperties().

valid()

bool DGtal::Color::valid

(

)

const

Referenced by LibBoard::Dot::flushFIG(), LibBoard::Line::flushFIG(), LibBoard::Arrow::flushFIG(), LibBoard::Polyline::flushFIG(), LibBoard::Rectangle::flushFIG(), LibBoard::Image::flushFIG(), LibBoard::Ellipse::flushFIG(), and LibBoard::Board::saveFIG().

Field Documentation

Aqua

const DGtal::Color DGtal::Color::Aqua

static

Definition at line 426 of file Color.h.

Black

const DGtal::Color DGtal::Color::Black

static

Definition at line 413 of file Color.h.

Referenced by addColorMapSample(), drawCCP(), drawPolygon(), DGtal::Shortcuts< TKSpace >::getZeroTickedColorMap(), main(), saveToObj(), LibBoard::Board::State::State(), testBreadthFirstPropagation(), testCMAP(), testDepthFirstPropagation(), testDistancePropagation(), testGrayscaleColorMap(), and tikz().

Blue

const DGtal::Color DGtal::Color::Blue

static

Examples

geometry/curves/exampleAlphaThickSegment.cpp, geometry/curves/exampleAlphaThickSegmentNoisy.cpp, geometry/curves/exampleAlphaThickSegmentTgtCover.cpp, geometry/tools/exampleConvexHull2D.cpp, topology/ctopo-fillContours.cpp, and tutorial-examples/volDTGranulo.cpp.

Definition at line 419 of file Color.h.

Referenced by convexHull(), drawCCP(), main(), showGreedySegmantation(), testAlphaThickSegmentConvexHullAndBox(), testAlphaThickSegmentFreeman(), testAlphaThickSpecialInit(), testConvexHullCompThickness(), testMeshGeneration(), testThicknessDefinitions(), testVisualTubularMesh(), and tikz().

Cyan

const DGtal::Color DGtal::Color::Cyan

static

Definition at line 420 of file Color.h.

Referenced by main().

Gray

const DGtal::Color DGtal::Color::Gray

static

Examples

geometry/curves/greedyAlphaThickDecomposition.cpp.

Definition at line 414 of file Color.h.

Referenced by main(), testAlphaThickSegmentComputerFloatingPointContour(), testAlphaThickSegmentConvexHullAndBox(), testThicknessDefinitions(), and tikz().

Green

const DGtal::Color DGtal::Color::Green

static

Examples

geometry/curves/exampleAlphaThickSegment.cpp, geometry/curves/exampleAlphaThickSegmentNoisy.cpp, and tutorial-examples/volDTGranulo.cpp.

Definition at line 417 of file Color.h.

Referenced by drawCCP(), main(), testAlphaThickSegmentConvexHullAndBox(), testAlphaThickSegmentFreeman(), testAlphaThickSpecialInit(), testMeshGeneration(), testThicknessDefinitions(), and tikz().

Lime

const DGtal::Color DGtal::Color::Lime

static

Definition at line 418 of file Color.h.

Referenced by tikz().

Magenta

const DGtal::Color DGtal::Color::Magenta

static

Definition at line 421 of file Color.h.

Referenced by main(), and testAlphaThickSegmentConvexHullAndBox().

myAlpha

unsigned char DGtal::Color::myAlpha

private

The opacity.

Definition at line 436 of file Color.h.

Referenced by operator!=(), operator*(), operator*=(), operator+(), operator+=(), operator-(), operator-=(), operator<(), and operator==().

myBlue

unsigned char DGtal::Color::myBlue

private

The blue component.

Definition at line 435 of file Color.h.

Referenced by Color(), operator!=(), operator*(), operator*=(), operator+(), operator+=(), operator-(), operator-=(), operator<(), and operator==().

myGreen

unsigned char DGtal::Color::myGreen

private

The green component.

Definition at line 434 of file Color.h.

Referenced by Color(), operator!=(), operator*(), operator*=(), operator+(), operator+=(), operator-(), operator-=(), operator<(), and operator==().

myRed

unsigned char DGtal::Color::myRed

private

The red component.

Definition at line 433 of file Color.h.

Referenced by Color(), operator!=(), operator*(), operator*=(), operator+(), operator+=(), operator-(), operator-=(), operator<(), and operator==().

Navy

const DGtal::Color DGtal::Color::Navy

static

Definition at line 425 of file Color.h.

Referenced by tikz().

None

const DGtal::Color DGtal::Color::None

static

Examples

geometry/curves/exampleAlphaThickSegment.cpp, geometry/curves/exampleAlphaThickSegmentNoisy.cpp, and topology/ctopo-fillContours.cpp.

Definition at line 412 of file Color.h.

Referenced by addColorMapSample(), LibBoard::Board::drawArc(), LibBoard::Board::drawArrow(), LibBoard::Board::fillCircle(), LibBoard::Shape::filled(), LibBoard::Board::fillEllipse(), LibBoard::Board::fillPolyline(), LibBoard::Board::fillRectangle(), LibBoard::Board::fillTriangle(), LibBoard::Arrow::flushCairo(), LibBoard::Polyline::flushCairo(), LibBoard::Rectangle::flushCairo(), LibBoard::QuadraticBezierCurve::flushCairo(), LibBoard::Ellipse::flushCairo(), LibBoard::Circle::flushCairo(), LibBoard::Arc::flushCairo(), LibBoard::GouraudTriangle::flushFIG(), LibBoard::Polyline::flushPostscript(), LibBoard::QuadraticBezierCurve::flushPostscript(), LibBoard::Ellipse::flushPostscript(), LibBoard::Arc::flushPostscript(), main(), LibBoard::Board::saveCairo(), LibBoard::Board::saveEPS(), LibBoard::Board::saveFIG(), DGtal::Shortcuts< TKSpace >::saveOFF(), LibBoard::Board::saveSVG(), LibBoard::Board::saveTikZ(), LibBoard::Board::State::State(), svg(), svgAlpha(), LibBoard::Shape::svgProperties(), testAlphaThickSegmentConvexHullAndBox(), testComputeInterior(), testMultiWidth(), testThicknessDefinitions(), and tikz().

Purple

const DGtal::Color DGtal::Color::Purple

static

Definition at line 424 of file Color.h.

Referenced by testAlphaThickSegmentConvexHullAndBox(), testMeshReader(), testThicknessDefinitions(), and tikz().

Red

const DGtal::Color DGtal::Color::Red

static

Examples

geometry/tools/exampleConvexHull2D.cpp, topology/ctopo-fillContours.cpp, and tutorial-examples/volDTGranulo.cpp.

Definition at line 416 of file Color.h.

Referenced by convexHull(), drawCCP(), drawPolygon(), laplacian(), main(), saveToObj(), specificTestLatticePolytope2D(), testAlphaThickSegmentConvexHullAndBox(), testBreadthFirstPropagation(), testCMAP(), testColor(), testComputeInterior(), testConvexHullCompThickness(), testDepthFirstPropagation(), testDisplay(), testDistancePropagation(), testMesh(), testMeshReader(), testShapes(), testThicknessDefinitions(), and tikz().

Silver

const DGtal::Color DGtal::Color::Silver

static

Definition at line 423 of file Color.h.

Referenced by tikz().

White

const DGtal::Color DGtal::Color::White

static

Definition at line 415 of file Color.h.

Referenced by main(), testGrayscaleColorMap(), testMesh(), testTickedColorMap(), and tikz().

Yellow

const DGtal::Color DGtal::Color::Yellow

static

Examples

tutorial-examples/volDTGranulo.cpp.

Definition at line 422 of file Color.h.

Referenced by drawCCP(), main(), testAlphaThickSegmentConvexHullAndBox(), and testMeshGeneration().

---

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

• Color.h
• Color.cpp