From 7ba28704d3c333bc7f256b608ca0a279de005b91 Mon Sep 17 00:00:00 2001 From: Vaxry Date: Tue, 3 Dec 2024 17:52:39 +0000 Subject: [PATCH] color: Add color --- include/hyprgraphics/color/Color.hpp | 38 +++++++++ src/color/Color.cpp | 115 +++++++++++++++++++++++++++ 2 files changed, 153 insertions(+) create mode 100644 include/hyprgraphics/color/Color.hpp create mode 100644 src/color/Color.cpp diff --git a/include/hyprgraphics/color/Color.hpp b/include/hyprgraphics/color/Color.hpp new file mode 100644 index 0000000..315fa71 --- /dev/null +++ b/include/hyprgraphics/color/Color.hpp @@ -0,0 +1,38 @@ +#pragma once + +namespace Hyprgraphics { + class CColor { + public: + // SRGB (NOT linear!!) 0.0 - 1.0 + struct SSRGB { + double r = 0, g = 0, b = 0; + }; + + // HSL 0.0 - 1.0 + struct SHSL { + double h = 0, s = 0, l = 0; + }; + + // OkLab 0.0 - 1.0 + struct SOkLab { + double l = 0, a = 0, b = 0; + }; + + CColor(); // black + CColor(const SSRGB& rgb); + CColor(const SHSL& hsl); + CColor(const SOkLab& lab); + + SSRGB asRgb() const; + SHSL asHSL() const; + SOkLab asOkLab() const; + + bool operator==(const CColor& other) const { + return other.r == r && other.g == g && other.b == b; + } + + private: + // SRGB space for internal color storage + double r = 0, g = 0, b = 0; + }; +}; diff --git a/src/color/Color.cpp b/src/color/Color.cpp new file mode 100644 index 0000000..3de4454 --- /dev/null +++ b/src/color/Color.cpp @@ -0,0 +1,115 @@ +#include +#include + +using namespace Hyprgraphics; + +static double gammaToLinear(const double in) { + return in >= 0.04045 ? std::pow((in + 0.055) / 1.055, 2.4) : in / 12.92; +} + +static double linearToGamma(const double in) { + return in >= 0.0031308 ? 1.055 * std::pow(in, 0.41666666666) - 0.055 : 12.92 * in; +} + +static double hueToRgb(double p, double q, double t) { + if (t < 0) + t += 1; + if (t > 1) + t -= 1; + if (t < 1.0 / 6.0) + return p + (q - p) * 6.0 * t; + if (t < 1.0 / 2.0) + return q; + if (t < 2.0 / 3.0) + return p + (q - p) * (2.0 / 3.0 - t) * 6.0; + return p; +} + +Hyprgraphics::CColor::CColor() { + ; +} + +Hyprgraphics::CColor::CColor(const SSRGB& rgb) { + r = rgb.r; + g = rgb.g; + b = rgb.b; +} + +Hyprgraphics::CColor::CColor(const SHSL& hsl) { + if (hsl.s <= 0) { + r = hsl.l; + g = hsl.l; + b = hsl.l; + } else { + const double q = hsl.l < 0.5 ? hsl.l * (1.0 + hsl.s) : hsl.l + hsl.s - hsl.l * hsl.s; + const double p = 2.0 * hsl.l - q; + r = hueToRgb(p, q, hsl.h + 1.0 / 3.0); + g = hueToRgb(p, q, hsl.h); + b = hueToRgb(p, q, hsl.h - 1.0 / 3.0); + } +} + +Hyprgraphics::CColor::CColor(const SOkLab& lab) { + const double l = std::pow(lab.l + lab.a * 0.3963377774 + lab.b * 0.2158037573, 3); + const double m = std::pow(lab.l + lab.a * (-0.1055613458) + lab.b * (-0.0638541728), 3); + const double s = std::pow(lab.l + lab.a * (-0.0894841775) + lab.b * (-1.2914855480), 3); + + r = linearToGamma(l * 4.0767416621 + m * -3.3077115913 + s * 0.2309699292); + g = linearToGamma(l * (-1.2684380046) + m * 2.6097574011 + s * (-0.3413193965)); + b = linearToGamma(l * (-0.0041960863) + m * (-0.7034186147) + s * 1.7076147010); +} + +Hyprgraphics::CColor::SSRGB Hyprgraphics::CColor::asRgb() const { + return Hyprgraphics::CColor::SSRGB{ + .r = r, + .g = g, + .b = b, + }; +} + +Hyprgraphics::CColor::SHSL Hyprgraphics::CColor::asHSL() const { + const double vmax = std::max(std::max(r, g), b), vmin = std::min(std::min(r, g), b); + double h = 0, s = 0, l = (vmax + vmin) / 2.0; + + if (vmax == vmin) { + return Hyprgraphics::CColor::SHSL{ + .h = 0, + .s = 0, + .l = l, + }; + } + + const double d = vmax - vmin; + s = l > 0.5 ? d / (2.0 - vmax - vmin) : d / (vmax + vmin); + + if (vmax == r) + h = (g - b) / d + (g < b ? 6.0 : 0.0); + if (vmax == g) + h = (b - r) / d + 2; + if (vmax == b) + h = (r - g) / d + 4; + + h /= 6.0; + + return Hyprgraphics::CColor::SHSL{ + .h = h, + .s = s, + .l = l, + }; +} + +Hyprgraphics::CColor::SOkLab Hyprgraphics::CColor::asOkLab() const { + const double linR = gammaToLinear(r); + const double linG = gammaToLinear(g); + const double linB = gammaToLinear(b); + + const double l = std::cbrtf(0.4122214708 * linR + 0.5363325363 * linG + 0.0514459929 * linB); + const double m = std::cbrtf(0.2119034982 * linR + 0.6806995451 * linG + 0.1073969566 * linB); + const double s = std::cbrtf(0.0883024619 * linR + 0.2817188376 * linG + 0.6299787005 * linB); + + return Hyprgraphics::CColor::SOkLab{ + .l = l * 0.2104542553 + m * 0.7936177850 + s * (-0.0040720468), + .a = l * 1.9779984951 + m * (-2.4285922050) + s * 0.4505937099, + .b = l * 0.0259040371 + m * 0.7827717662 + s * (-0.8086757660), + }; +}