hyperion.ng/libsrc/utils/OkhsvTransform.cpp
xkns 2fb2fc9dd7
Saturation & Brightness/Value Gain using Oklab color space (#1477)
* 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>
2022-08-17 23:26:19 +02:00

70 lines
1.4 KiB
C++

#include <algorithm>
#include <utils/OkhsvTransform.h>
#include <utils/ColorSys.h>
/// Clamps between 0.f and 1.f. Should generally be branchless
double clamp(double value)
{
return std::max(0.0, std::min(value, 1.0));
}
OkhsvTransform::OkhsvTransform()
{
_saturationGain = 1.0;
_brightnessGain = 1.0;
_isIdentity = true;
}
OkhsvTransform::OkhsvTransform(double saturationGain, double brightnessGain)
{
_saturationGain = saturationGain;
_brightnessGain = brightnessGain;
updateIsIdentity();
}
double OkhsvTransform::getSaturationGain() const
{
return _saturationGain;
}
void OkhsvTransform::setSaturationGain(double saturationGain)
{
_saturationGain = saturationGain;
updateIsIdentity();
}
double OkhsvTransform::getBrightnessGain() const
{
return _brightnessGain;
}
void OkhsvTransform::setBrightnessGain(double brightnessGain)
{
_brightnessGain= brightnessGain;
updateIsIdentity();
}
bool OkhsvTransform::isIdentity() const
{
return _isIdentity;
}
void OkhsvTransform::transform(uint8_t & red, uint8_t & green, uint8_t & blue) const
{
double hue;
double saturation;
double brightness;
ColorSys::rgb2okhsv(red, green, blue, hue, saturation, brightness);
saturation = clamp(saturation * _saturationGain);
brightness = clamp(brightness * _brightnessGain);
ColorSys::okhsv2rgb(hue, saturation, brightness, red, green, blue);
}
void OkhsvTransform::updateIsIdentity()
{
_isIdentity = _saturationGain == 1.0 && _brightnessGain == 1.0;
}