#include <KisScreentoneBrightnessContrastFunctions.h>

Public Member Functions
	BrightnessContrast (qreal brightness, qreal contrast)

qreal	operator() (qreal x) const

Private Attributes
qreal	m_b

qreal	m_m

Detailed Description

Definition at line 25 of file KisScreentoneBrightnessContrastFunctions.h.

Constructor & Destructor Documentation

◆ BrightnessContrast()

KisScreentoneBrightnessContrastFunctions::BrightnessContrast::BrightnessContrast	(	qreal	brightness,
		qreal	contrast )

Definition at line 13 of file KisScreentoneBrightnessContrastFunctions.cpp.

{
    if (contrast > 0.0) {
        if (qFuzzyCompare(contrast, 1.0)) {
            m_m = 10000.0;
        } else {
            m_m = 1.0 / (1.0 - contrast);
        }
        m_b = -m_m * (contrast / 2.0);
    } else {
        m_m = 1.0 + contrast;
        m_b = -contrast / 2.0;
    }
    m_b += (1.0 - m_b) * brightness;
}