kblight.cpp File Reference

#include <cmath>
#include <QDateTime>
#include <QSet>
#include "kblight.h"
#include "kbmode.h"

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Functions
static float	sToL (float srgb)
static float	lToS (float linear)
QRgb	monoRgb (float r, float g, float b)

Variables
static int	_shareDimming = -1
static QSet< KbLight * >	activeLights

Function Documentation

static float lToS ( float  linear )

static

Definition at line 277 of file kblight.cpp.

Referenced by KbLight::frameUpdate(), and monoRgb().

                               {
    if(linear <= 0.0031308f)
        return 12.92f * linear * 255.f;
    return (1.055f * pow(linear, 1.f / 2.4f) - 0.055f) * 255.f;
}

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QRgb monoRgb	(	float	r,
		float	g,
		float	b
	)

Definition at line 284 of file kblight.cpp.

References lToS(), and sToL().

Referenced by KbLight::base(), KbLight::frameUpdate(), and KeyWidget::paintEvent().

                                       {
    // It's important to use a linear colorspace for this, otherwise the colors will appear inconsistent
    // Note that although we could use linear space for alpha blending or the animation blending functions, we don't.
    // The reason for this is that photo manipulation programs don't do it either, so even though the result would technically be more correct,
    // it would look wrong to most people.
    r = sToL(r);
    g = sToL(g);
    b = sToL(b);
    int value = round(lToS((r + g + b) / 3.f));
    return qRgb(value, value, value);
}

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static float sToL ( float  srgb )

static

Definition at line 270 of file kblight.cpp.

Referenced by KbLight::frameUpdate(), and monoRgb().

                             {
    srgb /= 255.f;
    if(srgb <= 0.04045f)
        return srgb / 12.92f;
    return pow((srgb + 0.055f) / 1.055f, 2.4f);
}

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Variable Documentation

int _shareDimming = -1

static

Definition at line 7 of file kblight.cpp.

Referenced by KbLight::dimming(), KbLight::open(), and KbLight::shareDimming().

QSet<KbLight*> activeLights

static

Definition at line 8 of file kblight.cpp.

Referenced by KbLight::close(), KbLight::open(), KbLight::shareDimming(), and KbLight::~KbLight().