KiCad PCB EDA Suite
color4d.h
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1 /*
2  * This program source code file is part of KICAD, a free EDA CAD application.
3  *
4  * Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
5  * Copyright (C) 2017-2019 Kicad Developers, see AUTHORS.txt for contributors.
6  *
7  * Color class
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License
11  * as published by the Free Software Foundation; either version 2
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25  */
26 
27 #ifndef COLOR4D_H_
28 #define COLOR4D_H_
29 
30 #include <colors.h>
31 #include <cassert>
32 
33 namespace KIGFX
34 {
39 class COLOR4D
40 {
41 public:
42  // Constructor (creates the Color 0,0,0,0)
43  COLOR4D() :
44  r( 0 ), g( 0 ), b( 0 ), a( 1.0 )
45  {
46  }
47 
56  constexpr COLOR4D( double aRed, double aGreen, double aBlue, double aAlpha ) :
57  r( aRed ), g( aGreen ), b( aBlue ), a( aAlpha )
58  {
59  assert( r >= 0.0 && r <= 1.0 );
60  assert( g >= 0.0 && g <= 1.0 );
61  assert( b >= 0.0 && b <= 1.0 );
62  assert( a >= 0.0 && a <= 1.0 );
63  }
64 
71  COLOR4D( EDA_COLOR_T aColor );
72 
73 #ifdef WX_COMPATIBILITY
74 
79  COLOR4D( const wxColour& aColor );
80 
88  bool SetFromWxString( const wxString& aColorString );
89 
90  wxString ToWxString( long flags ) const;
91 
92  wxColour ToColour() const;
93 
104  COLOR4D LegacyMix( COLOR4D aColor ) const;
105 
110  unsigned int ToU32() const;
111 
115  void FromU32( unsigned int aPackedColor );
116 #endif /* WX_COMPATIBLITY */
117 
118 
128  void ToHSL( double& aOutHue, double& aOutSaturation, double& aOutValue ) const;
129 
138  void FromHSL( double aInHue, double aInSaturation, double aInLightness );
139 
146  COLOR4D& Brighten( double aFactor )
147  {
148  assert( aFactor >= 0.0 && aFactor <= 1.0 );
149 
150  r = r * ( 1.0 - aFactor ) + aFactor;
151  g = g * ( 1.0 - aFactor ) + aFactor;
152  b = b * ( 1.0 - aFactor ) + aFactor;
153 
154  return *this;
155  }
156 
163  COLOR4D& Darken( double aFactor )
164  {
165  assert( aFactor >= 0.0 && aFactor <= 1.0 );
166 
167  r = r * ( 1.0 - aFactor );
168  g = g * ( 1.0 - aFactor );
169  b = b * ( 1.0 - aFactor );
170 
171  return *this;
172  }
173 
180  {
181  r = ( 1.0 - r );
182  g = ( 1.0 - g );
183  b = ( 1.0 - b );
184 
185  return *this;
186  }
187 
191  COLOR4D& Saturate( double aFactor );
192 
199  COLOR4D Brightened( double aFactor ) const
200  {
201  assert( aFactor >= 0.0 && aFactor <= 1.0 );
202 
203  return COLOR4D( r * ( 1.0 - aFactor ) + aFactor,
204  g * ( 1.0 - aFactor ) + aFactor,
205  b * ( 1.0 - aFactor ) + aFactor,
206  a );
207  }
208 
215  COLOR4D Darkened( double aFactor ) const
216  {
217  assert( aFactor >= 0.0 && aFactor <= 1.0 );
218 
219  return COLOR4D( r * ( 1.0 - aFactor ),
220  g * ( 1.0 - aFactor ),
221  b * ( 1.0 - aFactor ),
222  a );
223  }
224 
231  COLOR4D Mix( const COLOR4D& aColor, double aFactor ) const
232  {
233  assert( aFactor >= 0.0 && aFactor <= 1.0 );
234 
235  return COLOR4D( aColor.r * ( 1.0 - aFactor ) + r * aFactor,
236  aColor.g * ( 1.0 - aFactor ) + g * aFactor,
237  aColor.b * ( 1.0 - aFactor ) + b * aFactor,
238  a );
239  }
240 
247  COLOR4D WithAlpha( double aAlpha ) const
248  {
249  assert( aAlpha >= 0.0 && aAlpha <= 1.0 );
250 
251  return COLOR4D( r, g, b, aAlpha );
252  }
253 
260  {
261  return COLOR4D( 1.0 - r, 1.0 - g, 1.0 - b, a );
262  }
263 
269  double GetBrightness() const
270  {
271  // Weighted W3C formula
272  return r * 0.299 + g * 0.587 + b * 0.117;
273  }
274 
288  void ToHSV( double& aOutHue, double& aOutSaturation, double& aOutValue, bool aAlwaysDefineHue = false ) const;
289 
298  void FromHSV( double aInH, double aInS, double aInV );
299 
300  // Color components: red, green, blue, alpha
301  double r;
302  double g;
303  double b;
304  double a;
305 
307  static const COLOR4D UNSPECIFIED;
308 
309  // Declare a few color shortcuts that are used for comparisons frequently
310  static const COLOR4D WHITE;
311  static const COLOR4D BLACK;
312 };
313 
315 const bool operator==( const COLOR4D& lhs, const COLOR4D& rhs );
316 
318 const bool operator!=( const COLOR4D& lhs, const COLOR4D& rhs );
319 
321 std::ostream &operator<<( std::ostream &aStream, COLOR4D const &aColor );
322 
323 } // namespace KIGFX
324 
325 #endif /* COLOR4D_H_ */
COLOR4D & Invert()
Function Invert Makes the color inverted, alpha remains the same.
Definition: color4d.h:179
EDA_COLOR_T
NOTE: EDA_COLOR_T is deprecated and is kept around for compatibility with legacy canvas.
Definition: colors.h:42
void ToHSV(double &aOutHue, double &aOutSaturation, double &aOutValue, bool aAlwaysDefineHue=false) const
Function ToHSV() Converts current color (stored in RGB) to HSV format.
Definition: color4d.cpp:224
double GetBrightness() const
Function GetBrightness Returns the brightness value of the color ranged from 0.0 to 1....
Definition: color4d.h:269
COLOR4D Inverted() const
Function Inverted Returns an inverted color, alpha remains the same.
Definition: color4d.h:259
Class CAIRO_GAL is the cairo implementation of the graphics abstraction layer.
Definition: color4d.cpp:131
COLOR4D & Brighten(double aFactor)
Function Brighten Makes the color brighter by a given factor.
Definition: color4d.h:146
COLOR4D & Saturate(double aFactor)
Saturates the color to a given factor (in HSV model)
Definition: color4d.cpp:351
COLOR4D WithAlpha(double aAlpha) const
Function WithAlpha Returns a colour with the same colour, but the given alpha.
Definition: color4d.h:247
double g
Green component.
Definition: color4d.h:302
COLOR4D Darkened(double aFactor) const
Function Darkened Returns a color that is darker by a given factor, without modifying object.
Definition: color4d.h:215
static const COLOR4D UNSPECIFIED
For legacy support; used as a value to indicate color hasn't been set yet.
Definition: color4d.h:307
double b
Blue component.
Definition: color4d.h:303
COLOR4D Brightened(double aFactor) const
Function Brightened Returns a color that is brighter by a given factor, without modifying object.
Definition: color4d.h:199
static const COLOR4D BLACK
Definition: color4d.h:311
double a
Alpha component.
Definition: color4d.h:304
static const COLOR4D WHITE
Definition: color4d.h:310
constexpr COLOR4D(double aRed, double aGreen, double aBlue, double aAlpha)
Constructor.
Definition: color4d.h:56
void ToHSL(double &aOutHue, double &aOutSaturation, double &aOutValue) const
Function ToHSL() Converts current color (stored in RGB) to HSL format.
Definition: color4d.cpp:152
std::ostream & operator<<(std::ostream &aStream, COLOR4D const &aColor)
Syntactic sugar for outputting colors to strings.
Definition: color4d.cpp:144
void FromHSV(double aInH, double aInS, double aInV)
Function FromHSV() Changes currently used color to the one given by hue, saturation and value paramet...
Definition: color4d.cpp:277
YYCODETYPE lhs
const bool operator==(const COLOR4D &lhs, const COLOR4D &rhs)
Equality operator, are two colors equal.
Definition: color4d.cpp:133
COLOR4D & Darken(double aFactor)
Function Darken Makes the color darker by a given factor.
Definition: color4d.h:163
double r
Red component.
Definition: color4d.h:301
const bool operator!=(const COLOR4D &lhs, const COLOR4D &rhs)
Not equality operator, are two colors not equal.
Definition: color4d.cpp:139
COLOR4D Mix(const COLOR4D &aColor, double aFactor) const
Function Mix Returns a color that is mixed with the input by a factor.
Definition: color4d.h:231
void FromHSL(double aInHue, double aInSaturation, double aInLightness)
Function FromHSL() Changes currently used color to the one given by hue, saturation and lightness par...
Definition: color4d.cpp:183
COLOR4D is the color representation with 4 components: red, green, blue, alpha.
Definition: color4d.h:39