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Saturation & Brightness/Value Gain using Oklab color space (#1477)

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* Imported Oklab reference implementation

* Add Okhsv conversions

* Fixed formatting error

* Add saturation and value gain to schemas

* Add english translation for saturation, value gain

* Created OkhsvTransform

* Make OkhsvTransform configurable

* Apply OkhvsTransform

* Clamped values during transform

* Precalculate isIdentity in OkhsvTransform

* Skip OkhsvTransform if it is the identity function

* Added changelog message

* Allow for full desaturation

* Imported recommended changes by LordGrey

* Fixed typo in constant

* Fixed anti-pattern in ok_color.h

* Correct indentions

* Correct remote-control

* Limited maximum gain settings to practical range

* Renane valueGain to brightnessGain for clarity and understanding

Co-authored-by: LordGrey <lordgrey.emmel@gmail.com>
This commit is contained in:
xkns
2022-08-17 23:26:19 +02:00
committed by GitHub
parent a2266b177f
commit 2fb2fc9dd7
17 changed files with 1033 additions and 32 deletions
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20
libsrc/utils/ColorSys.cpp
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@@ -1,6 +1,7 @@
#include <utils/ColorSys.h>
#include <QColor>
#include <oklab/ok_color.h>
inline uint8_t clamp(int x)
{
@@ -56,3 +57,22 @@ void ColorSys::yuv2rgb(uint8_t y, uint8_t u, uint8_t v, uint8_t &r, uint8_t &g,
g = clamp((298 * c - 100 * d - 208 * e + 128) >> 8);
b = clamp((298 * c + 516 * d + 128) >> 8);
}
void ColorSys::rgb2okhsv(uint8_t red, uint8_t green, uint8_t blue, double & hue, double & saturation, double & value)
{
ok_color::HSV color = ok_color::srgb_to_okhsv({ static_cast<float>(red) / 255.F,
static_cast<float>(green) / 255.F,
static_cast<float>(blue) / 255.F
});
hue = color.h;
saturation = color.s;
value = color.v;
}
void ColorSys::okhsv2rgb(double hue, double saturation, double value, uint8_t & red, uint8_t & green, uint8_t & blue)
{
ok_color::RGB color = ok_color::okhsv_to_srgb({ static_cast<float>(hue), static_cast<float>(saturation), static_cast<float>(value) });
red = static_cast<uint8_t>(std::lround(color.r * 255));
green = static_cast<uint8_t>(std::lround(color.g * 255));
blue = static_cast<uint8_t>(std::lround(color.b * 255));
}