1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLOR_HXX
#define INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLOR_HXX
#include <cppcanvas/color.hxx>
/* Definition of HSLColor class */
namespace slideshow
{
namespace internal
{
class RGBColor;
/** HSL color space class.
*/
class HSLColor
{
public:
HSLColor();
HSLColor( double nHue, double nSaturation, double nLuminance );
explicit HSLColor( const RGBColor& rColor );
/** Hue of the color.
@return hue, is in the range [0,360]
*/
double getHue() const;
/** Saturation of the color.
@return saturation, is in the range [0,1]
*/
double getSaturation() const;
/** Luminance of the color.
@return luminance, is in the range [0,1]
*/
double getLuminance() const;
struct HSLTriple
{
HSLTriple();
HSLTriple( double nHue, double nSaturation, double nLuminance );
double mnHue;
double mnSaturation;
double mnLuminance;
};
private:
// default copy/assignment are okay
// HSLColor(const HSLColor&);
// HSLColor& operator=( const HSLColor& );
HSLTriple maHSLTriple;
/// Pre-calculated value, needed for conversion back to RGB
double mnMagicValue;
};
bool operator==( const HSLColor& rLHS, const HSLColor& rRHS );
bool operator!=( const HSLColor& rLHS, const HSLColor& rRHS );
HSLColor operator+( const HSLColor& rLHS, const HSLColor& rRHS );
HSLColor operator*( const HSLColor& rLHS, const HSLColor& rRHS );
HSLColor operator*( double nFactor, const HSLColor& rRHS );
/** HSL color linear interpolator.
@param t
As usual, t must be in the [0,1] range
@param bCCW
When true, hue interpolation happens counter-clockwise
*/
HSLColor interpolate( const HSLColor& rFrom, const HSLColor& rTo, double t, bool bCCW=true );
}
}
#endif // INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLOR_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
