KisDesaturateAdjustment< _channel_type_, traits > Class Template Reference

Inheritance diagram for KisDesaturateAdjustment< _channel_type_, traits >:

Public Member Functions
	KisDesaturateAdjustment ()
int	parameterId (const QString &name) const override
QList< QString >	parameters () const override
void	setParameter (int id, const QVariant &parameter) override
void	transform (const quint8 *srcU8, quint8 *dstU8, qint32 nPixels) const override
Public Member Functions inherited from KoColorTransformation
virtual bool	isValid () const
void	setParameters (const QHash< QString, QVariant > &parameters)
virtual	~KoColorTransformation ()

Private Types
typedef RGBTrait::Pixel	RGBPixel
typedef traits	RGBTrait

Private Attributes
int	m_type {0}

Detailed Description

template<typename _channel_type_, typename traits>
class KisDesaturateAdjustment< _channel_type_, traits >

Definition at line 25 of file kis_desaturate_adjustment.cpp.

Member Typedef Documentation

RGBPixel

template<typename _channel_type_ , typename traits >

typedef RGBTrait::Pixel KisDesaturateAdjustment< _channel_type_, traits >::RGBPixel

private

Definition at line 28 of file kis_desaturate_adjustment.cpp.

RGBTrait

template<typename _channel_type_ , typename traits >

typedef traits KisDesaturateAdjustment< _channel_type_, traits >::RGBTrait

private

Definition at line 27 of file kis_desaturate_adjustment.cpp.

Constructor & Destructor Documentation

KisDesaturateAdjustment()

template<typename _channel_type_ , typename traits >

KisDesaturateAdjustment< _channel_type_, traits >::KisDesaturateAdjustment ( )

inline

Definition at line 31 of file kis_desaturate_adjustment.cpp.

    {
    }

Member Function Documentation

parameterId()

template<typename _channel_type_ , typename traits >

int KisDesaturateAdjustment< _channel_type_, traits >::parameterId ( const QString & name ) const

inlineoverridevirtual

Get the parameter id for a parameter name

Reimplemented from KoColorTransformation.

Definition at line 105 of file kis_desaturate_adjustment.cpp.

    {
        if (name == "type") {
            return 0;
        }
        return -1;
    }

parameters()

template<typename _channel_type_ , typename traits >

QList< QString > KisDesaturateAdjustment< _channel_type_, traits >::parameters ( ) const

inlineoverridevirtual

Returns

the list of parameters

Reimplemented from KoColorTransformation.

Definition at line 98 of file kis_desaturate_adjustment.cpp.

    {
      QList<QString> list;
      list << "type";
      return list;
    }

setParameter()

template<typename _channel_type_ , typename traits >

void KisDesaturateAdjustment< _channel_type_, traits >::setParameter ( int id, const QVariant & parameter )

inlineoverridevirtual

name - "type": 0: lightness 1: luminosity 2: average

Reimplemented from KoColorTransformation.

Definition at line 119 of file kis_desaturate_adjustment.cpp.

    {
        switch(id)
        {
        case 0:
            m_type = parameter.toDouble();
            break;
        default:
            ;
        }
    }

References KisDesaturateAdjustment< _channel_type_, traits >::m_type.

transform()

template<typename _channel_type_ , typename traits >

void KisDesaturateAdjustment< _channel_type_, traits >::transform ( const quint8 * src, quint8 * dst, qint32 nPixels ) const

inlineoverridevirtual

This function apply the transformation on a given number of pixels.

Parameters

src	a pointer to the source pixels
dst	a pointer to the destination pixels
nPixels	the number of pixels

This function may or may not be thread safe. You need to create one KoColorTransformation per thread.

Implements KoColorTransformation.

Definition at line 37 of file kis_desaturate_adjustment.cpp.

    {
        const RGBPixel* src = reinterpret_cast<const RGBPixel*>(srcU8);
        RGBPixel* dst = reinterpret_cast<RGBPixel*>(dstU8);
        float r, g, b, gray;
        while (nPixels > 0) {
 
            r = SCALE_TO_FLOAT(src->red);
            g = SCALE_TO_FLOAT(src->green);
            b = SCALE_TO_FLOAT(src->blue);
 
            // https://www.tannerhelland.com/3643/grayscale-image-algorithm-vb6/
            switch(m_type) {
            case 0: // lightness
            {
                gray = (qMax(qMax(r, g), b) + qMin(qMin(r, g), b)) / 2;
                break;
            }
            case 1: // luminosity BT 709
            {
                gray = r * 0.2126 + g * 0.7152 + b * 0.0722;
                break;
 
            }
 
            case 2: // luminosity BT 601
            {
                gray = r * 0.299 + g * 0.587 + b * 0.114;
                break;
 
            }
            case 3: // average
            {
                gray = (r + g + b) / 3;
                break;
            }
            case 4: // min
            {
                gray = qMin(qMin(r, g), b);
                break;
            }
            case 5: // min
            {
                gray = qMax(qMax(r, g), b);
                break;
            }
 
            default:
                gray = 0;
            }
            dst->red = SCALE_FROM_FLOAT(gray);
            dst->green = SCALE_FROM_FLOAT(gray);
            dst->blue = SCALE_FROM_FLOAT(gray);
            dst->alpha = src->alpha;
 
            --nPixels;
            ++src;
            ++dst;
        }
    }

References KisDesaturateAdjustment< _channel_type_, traits >::m_type, SCALE_FROM_FLOAT, and SCALE_TO_FLOAT.

Member Data Documentation

m_type

template<typename _channel_type_ , typename traits >

int KisDesaturateAdjustment< _channel_type_, traits >::m_type {0}

private

Definition at line 133 of file kis_desaturate_adjustment.cpp.

{0};

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The documentation for this class was generated from the following file:

• plugins/color/colorspaceextensions/kis_desaturate_adjustment.cpp