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colorm.h
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#pragma once
// ColorM is a header-only color conversion and manipulation library for css colors.
// The design of this library is influenced by chroma.js.
// https://gka.github.io/chroma.js/
// This library is released under the Unlicense license.
// This is free and unencumbered software released into the public domain.
//
// Anyone is free to copy, modify, publish, use, compile, sell, or
// distribute this software, either in source code form or as a compiled
// binary, for any purpose, commercial or non - commercial, and by any
// means.
//
// In jurisdictions that recognize copyright laws, the author or authors
// of this software dedicate any and all copyright interest in the
// software to the public domain.We make this dedication for the benefit
// of the public at large and to the detriment of our heirs and
// successors.We intend this dedication to be an overt act of
// relinquishment in perpetuity of all present and future rights to this
// software under copyright law.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
// For more information, please refer to <http://unlicense.org/>
#include <cmath>
#include <cstring>
#include <cassert>
#include <string>
#include <sstream>
#include <iomanip>
#include <vector>
#include <array>
#include <initializer_list>
#include <utility>
#include <algorithm>
namespace colorm
{
class Rgb;
class Hsl;
class Hwb;
class Lrgb;
class XyzD50;
class Lab;
class Lch;
class XyzD65;
class Oklab;
class Oklch;
class Srgb;
class DisplayP3;
class A98Rgb;
class ProphotoRgb;
class Rec2020;
// CSS's named colors.
// https://www.w3.org/TR/css-color-4/
enum class Cn : unsigned int
{
Aliceblue = 0xf0f8ff,
Antiquewhite = 0xfaebd7,
Aqua = 0x00ffff,
Aquamarine = 0x7fffd4,
Azure = 0xf0ffff,
Beige = 0xf5f5dc,
Bisque = 0xffe4c4,
Black = 0x000000,
Blanchedalmond = 0xffebcd,
Blue = 0x0000ff,
Blueviolet = 0x8a2be2,
Brown = 0xa52a2a,
Burlywood = 0xdeb887,
Cadetblue = 0x5f9ea0,
Chartreuse = 0x7fff00,
Chocolate = 0xd2691e,
Coral = 0xff7f50,
Cornflowerblue = 0x6495ed,
Cornsilk = 0xfff8dc,
Crimson = 0xdc143c,
Cyan = 0x00ffff,
Darkblue = 0x00008b,
Darkcyan = 0x008b8b,
Darkgoldenrod = 0xb8860b,
Darkgray = 0xa9a9a9,
Darkgreen = 0x006400,
Darkgrey = 0xa9a9a9,
Darkkhaki = 0xbdb76b,
Darkmagenta = 0x8b008b,
Darkolivegreen = 0x556b2f,
Darkorange = 0xff8c00,
Darkorchid = 0x9932cc,
Darkred = 0x8b0000,
Darksalmon = 0xe9967a,
Darkseagreen = 0x8fbc8f,
Darkslateblue = 0x483d8b,
Darkslategray = 0x2f4f4f,
Darkslategrey = 0x2f4f4f,
Darkturquoise = 0x00ced1,
Darkviolet = 0x9400d3,
Deeppink = 0xff1493,
Deepskyblue = 0x00bfff,
Dimgray = 0x696969,
Dimgrey = 0x696969,
Dodgerblue = 0x1e90ff,
Firebrick = 0xb22222,
Floralwhite = 0xfffaf0,
Forestgreen = 0x228b22,
Fuchsia = 0xff00ff,
Gainsboro = 0xdcdcdc,
Ghostwhite = 0xf8f8ff,
Gold = 0xffd700,
Goldenrod = 0xdaa520,
Gray = 0x808080,
Green = 0x008000,
Greenyellow = 0xadff2f,
Grey = 0x808080,
Honeydew = 0xf0fff0,
Hotpink = 0xff69b4,
Indianred = 0xcd5c5c,
Indigo = 0x4b0082,
Ivory = 0xfffff0,
Khaki = 0xf0e68c,
Lavender = 0xe6e6fa,
Lavenderblush = 0xfff0f5,
Lawngreen = 0x7cfc00,
Lemonchiffon = 0xfffacd,
Lightblue = 0xadd8e6,
Lightcoral = 0xf08080,
Lightcyan = 0xe0ffff,
Lightgoldenrodyellow = 0xfafad2,
Lightgray = 0xd3d3d3,
Lightgreen = 0x90ee90,
Lightgrey = 0xd3d3d3,
Lightpink = 0xffb6c1,
Lightsalmon = 0xffa07a,
Lightseagreen = 0x20b2aa,
Lightskyblue = 0x87cefa,
Lightslategray = 0x778899,
Lightslategrey = 0x778899,
Lightsteelblue = 0xb0c4de,
Lightyellow = 0xffffe0,
Lime = 0x00ff00,
Limegreen = 0x32cd32,
Linen = 0xfaf0e6,
Magenta = 0xff00ff,
Maroon = 0x800000,
Mediumaquamarine = 0x66cdaa,
Mediumblue = 0x0000cd,
Mediumorchid = 0xba55d3,
Mediumpurple = 0x9370db,
Mediumseagreen = 0x3cb371,
Mediumslateblue = 0x7b68ee,
Mediumspringgreen = 0x00fa9a,
Mediumturquoise = 0x48d1cc,
Mediumvioletred = 0xc71585,
Midnightblue = 0x191970,
Mintcream = 0xf5fffa,
Mistyrose = 0xffe4e1,
Moccasin = 0xffe4b5,
Navajowhite = 0xffdead,
Navy = 0x000080,
Oldlace = 0xfdf5e6,
Olive = 0x808000,
Olivedrab = 0x6b8e23,
Orange = 0xffa500,
Orangered = 0xff4500,
Orchid = 0xda70d6,
Palegoldenrod = 0xeee8aa,
Palegreen = 0x98fb98,
Paleturquoise = 0xafeeee,
Palevioletred = 0xdb7093,
Papayawhip = 0xffefd5,
Peachpuff = 0xffdab9,
Peru = 0xcd853f,
Pink = 0xffc0cb,
Plum = 0xdda0dd,
Powderblue = 0xb0e0e6,
Purple = 0x800080,
Rebeccapurple = 0x663399,
Red = 0xff0000,
Rosybrown = 0xbc8f8f,
Royalblue = 0x4169e1,
Saddlebrown = 0x8b4513,
Salmon = 0xfa8072,
Sandybrown = 0xf4a460,
Seagreen = 0x2e8b57,
Seashell = 0xfff5ee,
Sienna = 0xa0522d,
Silver = 0xc0c0c0,
Skyblue = 0x87ceeb,
Slateblue = 0x6a5acd,
Slategray = 0x708090,
Slategrey = 0x708090,
Snow = 0xfffafa,
Springgreen = 0x00ff7f,
Steelblue = 0x4682b4,
Tan = 0xd2b48c,
Teal = 0x008080,
Thistle = 0xd8bfd8,
Tomato = 0xff6347,
Turquoise = 0x40e0d0,
Violet = 0xee82ee,
Wheat = 0xf5deb3,
White = 0xffffff,
Whitesmoke = 0xf5f5f5,
Yellow = 0xffff00,
Yellowgreen = 0x9acd32
};
// Inline functions.
namespace impl
{
inline double normalize(double value, double vmax) noexcept
{
if (value <= 0.0) {
return 0.0;
} else if (value > vmax) {
return vmax;
}
return value;
}
inline double normalize1(double rate) noexcept
{
return normalize(rate, 1.0);
}
inline double normalize100(double value) noexcept
{
return normalize(value, 100.0);
}
inline double normalize255(double value) noexcept
{
return normalize(value, 255.0);
}
inline double normalizeHue(double hue) noexcept
{
hue = std::fmod(hue, 360.0);
if (!hue) {
return 0.0;
} else if (hue < 0.0) {
return hue + 360.0;
}
return hue;
}
inline double double255ToInteger(double value) noexcept
{
return normalize255(std::round(value));
}
inline double toPositiveValue(double value) noexcept
{
if (value <= 0.0) {
return 0.0;
}
return value;
}
inline double round(double value, double p) noexcept
{
double r = std::round(value * p) / p;
if (!r) {
return 0.0;
}
return r;
}
inline int compare(const char* s1, const char* s2) noexcept
{
#if defined(_MSC_VER)
return _stricmp(s1, s2);
#else
return strcasecmp(s1, s2);
#endif
}
inline int compare(const char* s1, const char* s2, size_t n) noexcept
{
#if defined(_MSC_VER)
return _strnicmp(s1, s2, n);
#else
return strncasecmp(s1, s2, n);
#endif
}
inline const char* search(const char* const* list, int start, int last, const char* s) noexcept
{
if (s == nullptr) {
return nullptr;
}
for (;;) {
const int i = (start + last) / 2;
const int cmp = compare(s, list[i * 2]);
if (cmp == 0) {
return list[i * 2 + 1];
} else if (cmp < 0) {
last = i - 1;
if (start > last) {
return s;
}
} else {
start = i + 1;
if (start > last) {
return s;
}
}
}
}
inline const char* toHex(const char* const name) noexcept
{
// CSS's named colors.
// https://www.w3.org/TR/css-color-4/
static const char* const NamedColor148[296] = {
"aliceblue", "#f0f8ff",
"antiquewhite", "#faebd7",
"aqua", "#00ffff",
"aquamarine", "#7fffd4",
"azure", "#f0ffff",
"beige", "#f5f5dc",
"bisque", "#ffe4c4",
"black", "#000000",
"blanchedalmond", "#ffebcd",
"blue", "#0000ff",
"blueviolet", "#8a2be2",
"brown", "#a52a2a",
"burlywood", "#deb887",
"cadetblue", "#5f9ea0",
"chartreuse", "#7fff00",
"chocolate", "#d2691e",
"coral", "#ff7f50",
"cornflowerblue", "#6495ed",
"cornsilk", "#fff8dc",
"crimson", "#dc143c",
"cyan", "#00ffff",
"darkblue", "#00008b",
"darkcyan", "#008b8b",
"darkgoldenrod", "#b8860b",
"darkgray", "#a9a9a9",
"darkgreen", "#006400",
"darkgrey", "#a9a9a9",
"darkkhaki", "#bdb76b",
"darkmagenta", "#8b008b",
"darkolivegreen", "#556b2f",
"darkorange", "#ff8c00",
"darkorchid", "#9932cc",
"darkred", "#8b0000",
"darksalmon", "#e9967a",
"darkseagreen", "#8fbc8f",
"darkslateblue", "#483d8b",
"darkslategray", "#2f4f4f",
"darkslategrey", "#2f4f4f",
"darkturquoise", "#00ced1",
"darkviolet", "#9400d3",
"deeppink", "#ff1493",
"deepskyblue", "#00bfff",
"dimgray", "#696969",
"dimgrey", "#696969",
"dodgerblue", "#1e90ff",
"firebrick", "#b22222",
"floralwhite", "#fffaf0",
"forestgreen", "#228b22",
"fuchsia", "#ff00ff",
"gainsboro", "#dcdcdc",
"ghostwhite", "#f8f8ff",
"gold", "#ffd700",
"goldenrod", "#daa520",
"gray", "#808080",
"green", "#008000",
"greenyellow", "#adff2f",
"grey", "#808080",
"honeydew", "#f0fff0",
"hotpink", "#ff69b4",
"indianred", "#cd5c5c",
"indigo", "#4b0082",
"ivory", "#fffff0",
"khaki", "#f0e68c",
"lavender", "#e6e6fa",
"lavenderblush", "#fff0f5",
"lawngreen", "#7cfc00",
"lemonchiffon", "#fffacd",
"lightblue", "#add8e6",
"lightcoral", "#f08080",
"lightcyan", "#e0ffff",
"lightgoldenrodyellow", "#fafad2",
"lightgray", "#d3d3d3",
"lightgreen", "#90ee90",
"lightgrey", "#d3d3d3",
"lightpink", "#ffb6c1",
"lightsalmon", "#ffa07a",
"lightseagreen", "#20b2aa",
"lightskyblue", "#87cefa",
"lightslategray", "#778899",
"lightslategrey", "#778899",
"lightsteelblue", "#b0c4de",
"lightyellow", "#ffffe0",
"lime", "#00ff00",
"limegreen", "#32cd32",
"linen", "#faf0e6",
"magenta", "#ff00ff",
"maroon", "#800000",
"mediumaquamarine", "#66cdaa",
"mediumblue", "#0000cd",
"mediumorchid", "#ba55d3",
"mediumpurple", "#9370db",
"mediumseagreen", "#3cb371",
"mediumslateblue", "#7b68ee",
"mediumspringgreen", "#00fa9a",
"mediumturquoise", "#48d1cc",
"mediumvioletred", "#c71585",
"midnightblue", "#191970",
"mintcream", "#f5fffa",
"mistyrose", "#ffe4e1",
"moccasin", "#ffe4b5",
"navajowhite", "#ffdead",
"navy", "#000080",
"oldlace", "#fdf5e6",
"olive", "#808000",
"olivedrab", "#6b8e23",
"orange", "#ffa500",
"orangered", "#ff4500",
"orchid", "#da70d6",
"palegoldenrod", "#eee8aa",
"palegreen", "#98fb98",
"paleturquoise", "#afeeee",
"palevioletred", "#db7093",
"papayawhip", "#ffefd5",
"peachpuff", "#ffdab9",
"peru", "#cd853f",
"pink", "#ffc0cb",
"plum", "#dda0dd",
"powderblue", "#b0e0e6",
"purple", "#800080",
"rebeccapurple", "#663399",
"red", "#ff0000",
"rosybrown", "#bc8f8f",
"royalblue", "#4169e1",
"saddlebrown", "#8b4513",
"salmon", "#fa8072",
"sandybrown", "#f4a460",
"seagreen", "#2e8b57",
"seashell", "#fff5ee",
"sienna", "#a0522d",
"silver", "#c0c0c0",
"skyblue", "#87ceeb",
"slateblue", "#6a5acd",
"slategray", "#708090",
"slategrey", "#708090",
"snow", "#fffafa",
"springgreen", "#00ff7f",
"steelblue", "#4682b4",
"tan", "#d2b48c",
"teal", "#008080",
"thistle", "#d8bfd8",
"tomato", "#ff6347",
"turquoise", "#40e0d0",
"violet", "#ee82ee",
"wheat", "#f5deb3",
"white", "#ffffff",
"whitesmoke", "#f5f5f5",
"yellow", "#ffff00",
"yellowgreen", "#9acd32"
};
return search(NamedColor148, 0, 148 - 1, name);
}
inline const char* toName(const char* const hex) noexcept
{
// CSS's named colors.
// https://www.w3.org/TR/css-color-4/
static const char* const NamedColor138R[276] = {
"#000000", "black",
"#000080", "navy",
"#00008b", "darkblue",
"#0000cd", "mediumblue",
"#0000ff", "blue",
"#006400", "darkgreen",
"#008000", "green",
"#008080", "teal",
"#008b8b", "darkcyan",
"#00bfff", "deepskyblue",
"#00ced1", "darkturquoise",
"#00fa9a", "mediumspringgreen",
"#00ff00", "lime",
"#00ff7f", "springgreen",
//"#00ffff", "aqua",
"#00ffff", "cyan",
"#191970", "midnightblue",
"#1e90ff", "dodgerblue",
"#20b2aa", "lightseagreen",
"#228b22", "forestgreen",
"#2e8b57", "seagreen",
"#2f4f4f", "darkslategray",
//"#2f4f4f", "darkslategrey",
"#32cd32", "limegreen",
"#3cb371", "mediumseagreen",
"#40e0d0", "turquoise",
"#4169e1", "royalblue",
"#4682b4", "steelblue",
"#483d8b", "darkslateblue",
"#48d1cc", "mediumturquoise",
"#4b0082", "indigo",
"#556b2f", "darkolivegreen",
"#5f9ea0", "cadetblue",
"#6495ed", "cornflowerblue",
"#66cdaa", "mediumaquamarine",
"#696969", "dimgray",
//"#696969", "dimgrey",
"#6a5acd", "slateblue",
"#6b8e23", "olivedrab",
"#708090", "slategray",
//"#708090", "slategrey",
"#778899", "lightslategray",
//"#778899", "lightslategrey",
"#7b68ee", "mediumslateblue",
"#7cfc00", "lawngreen",
"#7fff00", "chartreuse",
"#7fffd4", "aquamarine",
"#800000", "maroon",
"#800080", "purple",
"#808000", "olive",
"#808080", "gray",
//"#808080", "grey",
"#87ceeb", "skyblue",
"#87cefa", "lightskyblue",
"#8a2be2", "blueviolet",
"#8b0000", "darkred",
"#8b008b", "darkmagenta",
"#8b4513", "saddlebrown",
"#8fbc8f", "darkseagreen",
"#90ee90", "lightgreen",
"#9370db", "mediumpurple",
"#9400d3", "darkviolet",
"#98fb98", "palegreen",
"#9932cc", "darkorchid",
"#9acd32", "yellowgreen",
"#a0522d", "sienna",
"#a52a2a", "brown",
"#a9a9a9", "darkgray",
//"#a9a9a9", "darkgrey",
"#add8e6", "lightblue",
"#adff2f", "greenyellow",
"#afeeee", "paleturquoise",
"#b0c4de", "lightsteelblue",
"#b0e0e6", "powderblue",
"#b22222", "firebrick",
"#b8860b", "darkgoldenrod",
"#ba55d3", "mediumorchid",
"#bc8f8f", "rosybrown",
"#bdb76b", "darkkhaki",
"#c0c0c0", "silver",
"#c71585", "mediumvioletred",
"#cd5c5c", "indianred",
"#cd853f", "peru",
"#d2691e", "chocolate",
"#d2b48c", "tan",
"#d3d3d3", "lightgray",
//"#d3d3d3", "lightgrey",
"#d8bfd8", "thistle",
"#da70d6", "orchid",
"#daa520", "goldenrod",
"#db7093", "palevioletred",
"#dc143c", "crimson",
"#dcdcdc", "gainsboro",
"#dda0dd", "plum",
"#deb887", "burlywood",
"#e0ffff", "lightcyan",
"#e6e6fa", "lavender",
"#e9967a", "darksalmon",
"#ee82ee", "violet",
"#eee8aa", "palegoldenrod",
"#f08080", "lightcoral",
"#f0e68c", "khaki",
"#f0f8ff", "aliceblue",
"#f0fff0", "honeydew",
"#f0ffff", "azure",
"#f4a460", "sandybrown",
"#f5deb3", "wheat",
"#f5f5dc", "beige",
"#f5f5f5", "whitesmoke",
"#f5fffa", "mintcream",
"#f8f8ff", "ghostwhite",
"#fa8072", "salmon",
"#faebd7", "antiquewhite",
"#faf0e6", "linen",
"#fafad2", "lightgoldenrodyellow",
"#fdf5e6", "oldlace",
"#ff0000", "red",
//"#ff00ff", "fuchsia",
"#ff00ff", "magenta",
"#ff1493", "deeppink",
"#ff4500", "orangered",
"#ff6347", "tomato",
"#ff69b4", "hotpink",
"#ff7f50", "coral",
"#ff8c00", "darkorange",
"#ffa07a", "lightsalmon",
"#ffa500", "orange",
"#ffb6c1", "lightpink",
"#ffc0cb", "pink",
"#ffd700", "gold",
"#ffdab9", "peachpuff",
"#ffdead", "navajowhite",
"#ffe4b5", "moccasin",
"#ffe4c4", "bisque",
"#ffe4e1", "mistyrose",
"#ffebcd", "blanchedalmond",
"#ffefd5", "papayawhip",
"#fff0f5", "lavenderblush",
"#fff5ee", "seashell",
"#fff8dc", "cornsilk",
"#fffacd", "lemonchiffon",
"#fffaf0", "floralwhite",
"#fffafa", "snow",
"#ffff00", "yellow",
"#ffffe0", "lightyellow",
"#fffff0", "ivory",
"#ffffff", "white"
};
return search(NamedColor138R, 0, 138 - 1, hex);
}
inline const char* toName4(const char* const hex) noexcept
{
if (compare(hex, "#663399") == 0) {
return "rebeccapurple";
}
return toName(hex);
}
inline void printInteger(std::ostringstream& o, double f)
{
o << std::lround(f);
}
inline void printFloat(std::ostringstream& o, double f, double p, bool withoutLeadingZero = false)
{
const auto r = round(f, p);
if (!withoutLeadingZero) {
o << std::setprecision(14) << std::defaultfloat << r;
return;
}
std::ostringstream o2;
o2 << std::setprecision(12) << r;
const auto str = o2.str();
if (str.length() >= 3U) {
if (str[0] == '0' && str[1] == '.') {
o << str.substr(1U);
return;
} else if (str[0] == '-' && str[1] == '0' && str[2] == '.') {
o << '-' << str.substr(2U);
return;
}
}
o << str;
}
inline void printSeparetor(std::ostringstream& o, const char separator)
{
o << separator;
if (separator != ' ') {
o << ' ';
}
}
inline void printValue(std::ostringstream& o, double f, const char format)
{
switch (format) {
case '!':
o << std::setprecision(14) << std::defaultfloat << f;
break;
case '0':
printInteger(o, f);
break;
case '1':
printFloat(o, f, 10.0);
break;
case '2':
printFloat(o, f, 100.0);
break;
case '3':
printFloat(o, f, 1000.0);
break;
case '4':
printFloat(o, f, 10000.0);
break;
case '5':
printFloat(o, f, 100000.0);
break;
case '6':
printFloat(o, f, 1000000.0);
break;
case '7':
printFloat(o, f, 10000000.0);
break;
case '8':
printFloat(o, f, 100000000.0);
break;
case 'A':
printInteger(o, f);
o << '%';
break;
case 'B':
printFloat(o, f, 10.0);
o << '%';
break;
case 'C':
printFloat(o, f, 100.0);
o << '%';
break;
case 'D':
printFloat(o, f, 1000.0);
o << '%';
break;
case 'E':
printFloat(o, f, 10000.0);
o << '%';
break;
case 'F':
printFloat(o, f, 100000.0);
o << '%';
break;
case 'G':
printFloat(o, f, 1000000.0);
o << '%';
break;
}
}
inline double atan2Deg(double y, double x) noexcept
{
if (y == 0.0 && x == 0.0) {
return 0.0;
}
return std::atan2(y, x) * 180.0 / 3.14159265358979323846;
}
inline double sinDeg(double x) noexcept
{
return std::sin(x / 180.0 * 3.14159265358979323846);
}
inline double cosDeg(double x) noexcept
{
return std::cos(x / 180.0 * 3.14159265358979323846);
}
}
// A base class of 15 color classes.
template <typename T> class ColorBase
{
protected:
ColorBase() noexcept
: m1(0.0), m2(0.0), m3(0.0), ma(1.0) {}
explicit ColorBase(double al) noexcept
: m1(0.0), m2(0.0), m3(0.0), ma(al) {}
ColorBase(double f1, double f2, double f3, double al) noexcept
: m1(f1), m2(f2), m3(f3), ma(al) {}
void add(const ColorBase& c) noexcept
{
m1 += c.m1;
m2 += c.m2;
m3 += c.m3;
ma += c.ma;
}
void sub(const ColorBase& c) noexcept
{
m1 -= c.m1;
m2 -= c.m2;
m3 -= c.m3;
ma -= c.ma;
}
void mul(const ColorBase& c) noexcept
{
m1 *= c.m1;
m2 *= c.m2;
m3 *= c.m3;
ma *= c.ma;
}
void div(const ColorBase& c) noexcept
{
assert(c.m1 != 0.0 && c.m2 != 0.0 && c.m3 != 0.0 && c.ma != 0.0);
if (c.m1 == 0.0 || c.m2 == 0.0 || c.m3 == 0.0 || c.ma == 0.0) {
return;
}
m1 /= c.m1;
m2 /= c.m2;
m3 /= c.m3;
ma /= c.ma;
}
void add(double f) noexcept
{
m1 += f;
m2 += f;
m3 += f;
ma += f;
}
void sub(double f) noexcept
{
m1 -= f;
m2 -= f;
m3 -= f;
ma -= f;
}
void mul(double f) noexcept
{
m1 *= f;
m2 *= f;
m3 *= f;
ma *= f;
}
void div(double f) noexcept
{
assert(f != 0.0);
if (f == 0.0) {
return;
}
m1 /= f;
m2 /= f;
m3 /= f;
ma /= f;
}
bool equals(const ColorBase& c) const noexcept
{
return (m1 == c.m1)
&& (m2 == c.m2)
&& (m3 == c.m3)
&& (ma == c.ma);
}
bool less(const ColorBase& c) const noexcept
{
if (m1 < c.m1) return true;
if (m1 > c.m1) return false;
if (m2 < c.m2) return true;
if (m2 > c.m2) return false;
if (m3 < c.m3) return true;
if (m3 > c.m3) return false;
if (ma < c.ma) return true;
return false;
}
double measureDistance(const ColorBase& c) const noexcept
{
const double d1 = m1 - c.m1;
const double d2 = m2 - c.m2;
const double d3 = m3 - c.m3;
return std::sqrt(d1 * d1 + d2 * d2 + d3 * d3);
}
void printAlpha(std::ostringstream& o, const char* const separator, const char format) const
{
if (ma <= 0.0) {
o << separator << '0';
return;
}
double n = 0.0;
bool withoutLeadingZero = false;
bool percentage = false;
switch (format) {
case '!':
if (!isOpaque(1.0E12)) {
o << separator << std::setprecision(12) << std::defaultfloat << ma;
}
return;
case '+':
withoutLeadingZero = true;
n = 1000.0;
break;
case '-':
withoutLeadingZero = true;
n = 10000.0;
break;
case '*':
withoutLeadingZero = true;
n = 100000.0;
break;
case '/':
withoutLeadingZero = true;
n = 1000000.0;
break;
case '1':
n = 10.0;
break;
case '2':
n = 100.0;
break;
case '3':
n = 1000.0;
break;
case '4':
n = 10000.0;
break;
case '5':
n = 100000.0;
break;
case '6':
n = 1000000.0;
break;
case '7':
n = 10000000.0;
break;
case '8':
n = 100000000.0;
break;
case 'A':
percentage = true;
n = 100.0;
break;
case 'B':
percentage = true;
n = 1000.0;
break;
case 'C':
percentage = true;
n = 10000.0;
break;
case 'D':
percentage = true;
n = 100000.0;
break;
case 'E':
percentage = true;
n = 1000000.0;
break;
case 'F':
percentage = true;
n = 10000000.0;
break;
case 'G':
percentage = true;
n = 100000000.0;
break;
}
if (n > 0.0 && !isOpaque(n)) {
o << separator;
if (percentage) {
impl::printFloat(o, ma * 100.0, n / 100.0, withoutLeadingZero);
o << '%';
} else {
impl::printFloat(o, ma, n, withoutLeadingZero);
}
}
}
void printColor(std::ostringstream& o, const char* const s, const char (&format)[6], bool asColorFuntion = false) const
{
if (asColorFuntion) {
o << "color(" << s;
impl::printSeparetor(o, format[0]);
} else {
o << s << '(';
}
impl::printValue(o, m1, format[1]);
impl::printSeparetor(o, format[0]);
impl::printValue(o, m2, format[2]);
impl::printSeparetor(o, format[0]);