KoBasicF32HistogramProducer Class Reference

#include <KoBasicHistogramProducers.h>

Inheritance diagram for KoBasicF32HistogramProducer:

Public Member Functions
void	addRegionToBin (const quint8 *pixels, const quint8 *selectionMask, quint32 nPixels, const KoColorSpace *colorSpace) override
	KoBasicF32HistogramProducer (const KoID &id, const KoColorSpace *colorSpace)
qreal	maximalZoom () const override
QString	positionToString (qreal pos) const override
	~KoBasicF32HistogramProducer () override
Public Member Functions inherited from KoBasicHistogramProducer
QList< KoChannelInfo * >	channels () override
void	clear () override
qint32	count () override
qint32	getBinAt (int channel, int position) override
const KoID &	id () const override
	KoBasicHistogramProducer (const KoID &id, int channelCount, int nrOfBins)
	KoBasicHistogramProducer (const KoID &id, int nrOfBins, const KoColorSpace *colorSpace)
qint32	numberOfBins () override
qint32	outOfViewLeft (int channel) override
qint32	outOfViewRight (int channel) override
void	setView (qreal from, qreal size) override
qreal	viewFrom () const override
qreal	viewWidth () const override
	~KoBasicHistogramProducer () override
Public Member Functions inherited from KoHistogramProducer
virtual qint32	getBinAt (qint32 channel, qint32 position)=0
	KoHistogramProducer ()
virtual qint32	outOfViewLeft (qint32 channel)=0
virtual qint32	outOfViewRight (qint32 channel)=0
virtual void	setSkipTransparent (bool set)
virtual void	setSkipUnselected (bool set)
virtual	~KoHistogramProducer ()

Additional Inherited Members
Protected Types inherited from KoBasicHistogramProducer
typedef QVector< quint32 >	vBins
Protected Member Functions inherited from KoBasicHistogramProducer
virtual int	externalToInternal (int ext)
void	makeExternalToInternal ()
Protected Attributes inherited from KoBasicHistogramProducer
QVector< vBins >	m_bins
int	m_channels
const KoColorSpace *	m_colorSpace
qint32	m_count
QVector< qint32 >	m_external
qreal	m_from
KoID	m_id
int	m_nrOfBins
vBins	m_outLeft
vBins	m_outRight
qreal	m_width
Protected Attributes inherited from KoHistogramProducer
bool	m_skipTransparent
bool	m_skipUnselected

Detailed Description

Definition at line 114 of file KoBasicHistogramProducers.h.

Constructor & Destructor Documentation

KoBasicF32HistogramProducer()

KoBasicF32HistogramProducer::KoBasicF32HistogramProducer	(	const KoID &	id,
		const KoColorSpace *	colorSpace )

Definition at line 212 of file KoBasicHistogramProducers.cpp.

    : KoBasicHistogramProducer(id, 256, cs)
{
}

~KoBasicF32HistogramProducer()

KoBasicF32HistogramProducer::~KoBasicF32HistogramProducer ( )

inlineoverride

Definition at line 118 of file KoBasicHistogramProducers.h.

{}

Member Function Documentation

addRegionToBin()

void KoBasicF32HistogramProducer::addRegionToBin ( const quint8 * pixels, const quint8 * selectionMask, quint32 nPixels, const KoColorSpace * colorSpace )

overridevirtual

Adds the values from the specified array of pixels to the bins – does not reset anything.

Parameters

pixels	A pointer an array of pixeldata in the given colorspace
selectionMask	a pointer to an array of bytes, where 0 is unselected and 1-255 is degree of selectedness. The array must be just as long as the array of pixels.
nPixels	The number of pixels
colorSpace	the colorspace that can decode the pixel data.

Implements KoHistogramProducer.

Definition at line 228 of file KoBasicHistogramProducers.cpp.

{
    // The view
    float from = static_cast<float>(m_from);
    float width = static_cast<float>(m_width);
    float to = from + width;
    float factor = 255.0 / width;
 
    quint32 dstPixelSize = m_colorSpace->pixelSize();
    quint8 *dstPixels = new quint8[nPixels * dstPixelSize];
    cs->convertPixelsTo(pixels, dstPixels, m_colorSpace, nPixels, KoColorConversionTransformation::IntentAbsoluteColorimetric, KoColorConversionTransformation::Empty);
    quint8 *dst = dstPixels;
    QVector<float> channels(m_colorSpace->channelCount());
 
    if (selectionMask) {
        while (nPixels > 0) {
            if (!((m_skipUnselected && *selectionMask == 0) || (m_skipTransparent && cs->opacityU8(pixels) == OPACITY_TRANSPARENT_U8))) {
                m_colorSpace->normalisedChannelsValue(dst,channels);
                for (int i = 0; i < (int)m_colorSpace->channelCount(); i++) {
                    float value = channels[i];
                    if (value > to)
                        m_outRight[i]++;
                    else if (value < from)
                        m_outLeft[i]++;
                    else
                        m_bins[i][static_cast<quint8>((value - from) * factor)]++;
                }
                m_count++;
            }
            dst += dstPixelSize;
            selectionMask++;
            nPixels--;
 
        }
    } else {
        while (nPixels > 0) {
            if (!(m_skipTransparent && cs->opacityU8(pixels) == OPACITY_TRANSPARENT_U8)) {
                m_colorSpace->normalisedChannelsValue(dst,channels);
                for (int i = 0; i < (int)m_colorSpace->channelCount(); i++) {
                    float value = channels[i];
                    if (value > to)
                        m_outRight[i]++;
                    else if (value < from)
                        m_outLeft[i]++;
                    else
                        m_bins[i][static_cast<quint8>((value - from) * factor)]++;
                }
                m_count++;
            }
            dst += dstPixelSize;
            nPixels--;
 
        }
    }
}

References KoColorSpace::channelCount(), KoBasicHistogramProducer::channels(), KoColorSpace::convertPixelsTo(), KoColorConversionTransformation::Empty, KoColorConversionTransformation::IntentAbsoluteColorimetric, KoBasicHistogramProducer::m_bins, KoBasicHistogramProducer::m_colorSpace, KoBasicHistogramProducer::m_count, KoBasicHistogramProducer::m_from, KoBasicHistogramProducer::m_outLeft, KoBasicHistogramProducer::m_outRight, KoHistogramProducer::m_skipTransparent, KoHistogramProducer::m_skipUnselected, KoBasicHistogramProducer::m_width, KoColorSpace::normalisedChannelsValue(), OPACITY_TRANSPARENT_U8, KoColorSpace::opacityU8(), KoColorSpace::pixelSize(), and value().

maximalZoom()

qreal KoBasicF32HistogramProducer::maximalZoom ( ) const

overridevirtual

Implements KoHistogramProducer.

Definition at line 222 of file KoBasicHistogramProducers.cpp.

{
    // XXX What _is_ the maximal zoom here? I don't think there is one with floats, so this seems a fine compromise for the moment
    return 1.0 / 255.0;
}

positionToString()

QString KoBasicF32HistogramProducer::positionToString ( qreal pos ) const

overridevirtual

Implements KoHistogramProducer.

Definition at line 217 of file KoBasicHistogramProducers.cpp.

{
    return QString("%1").arg(static_cast<float>(pos)); // XXX I doubt this is correct!
}

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

• libs/pigment/KoBasicHistogramProducers.h
• libs/pigment/KoBasicHistogramProducers.cpp