#include <kis_lod_transform_base.h>

Inheritance diagram for KisLodTransformBase:

Public Member Functions
	KisLodTransformBase (int levelOfDetail)

QRect	map (const QRect &rc) const

QRectF	map (const QRectF &rc) const

template<class T >
T	map (const T &object) const

QRect	mapInverted (const QRect &rc) const

QRectF	mapInverted (const QRectF &rc) const

QTransform	transform () const

Static Public Member Functions
static QRect	alignedRect (const QRect &srcRect, int lod)

static int	coordToLodCoord (int x, int lod)

static qreal	lodToInvScale (int levelOfDetail)

static qreal	lodToScale (int levelOfDetail)

template<class PaintDeviceTypeSP >
static qreal	lodToScale (PaintDeviceTypeSP device)

static QRect	scaledRect (const QRect &srcRect, int lod)

static int	scaleToLod (qreal scale, int maxLod)

static QRect	upscaledRect (const QRect &srcRect, int lod)

Protected Attributes
int	m_levelOfDetail

QTransform	m_transform

Static Private Member Functions
static void	alignByPow2ButOneHi (qint32 &value, qint32 alignment)

static void	alignByPow2Lo (qint32 &value, qint32 alignment)

static int	divideSafe (int x, int lod)

Friends
class	KisRectsGrid

Detailed Description

Definition at line 17 of file kis_lod_transform_base.h.

Constructor & Destructor Documentation

◆ KisLodTransformBase()

KisLodTransformBase::KisLodTransformBase ( int levelOfDetail )

inline

Definition at line 19 of file kis_lod_transform_base.h.

                                           {
        qreal scale = lodToScale(levelOfDetail);
        m_transform = QTransform::fromScale(scale, scale);
        m_levelOfDetail = levelOfDetail;
    }

Member Function Documentation

◆ alignByPow2ButOneHi()

static void KisLodTransformBase::alignByPow2ButOneHi	(	qint32 &	value,
		qint32	alignment )

inlinestaticprivate

Aligns @value to the lowest integer not smaller than @value and that is, increased by one, a divident of alignment

Definition at line 146 of file kis_lod_transform_base.h.

    {
        qint32 mask = alignment - 1;
        value |= mask;
    }

References value().

◆ alignByPow2Lo()

static void KisLodTransformBase::alignByPow2Lo	(	qint32 &	value,
		qint32	alignment )

inlinestaticprivate

Aligns @value to the highest integer not exceeding @value and that is a divident of @alignment

Definition at line 156 of file kis_lod_transform_base.h.

    {
        qint32 mask = alignment - 1;
         value &= ~mask;
    }

References value().

◆ alignedRect()

static QRect KisLodTransformBase::alignedRect	(	const QRect &	srcRect,
		int	lod )

inlinestatic

Here is a workaround of Qt's QRect::right()/bottom() "historical reasons". It should be one pixel smaller than actual right/bottom position

Definition at line 67 of file kis_lod_transform_base.h.

    {
        qint32 alignment = 1 << lod;
 
        qint32 x1, y1, x2, y2;
        srcRect.getCoords(&x1, &y1, &x2, &y2);
 
        alignByPow2Lo(x1, alignment);
        alignByPow2Lo(y1, alignment);
 
        alignByPow2ButOneHi(x2, alignment);
        alignByPow2ButOneHi(y2, alignment);
 
        QRect rect;
        rect.setCoords(x1, y1, x2, y2);
 
        return rect;
    }

References alignByPow2ButOneHi(), and alignByPow2Lo().

◆ coordToLodCoord()

static int KisLodTransformBase::coordToLodCoord	(	int	x,
		int	lod )

inlinestatic

Definition at line 132 of file kis_lod_transform_base.h.

                                                      {
        return divideSafe(x, lod);
    }

◆ divideSafe()

static int KisLodTransformBase::divideSafe	(	int	x,
		int	lod )

inlinestaticprivate

Definition at line 162 of file kis_lod_transform_base.h.

                                                 {
        return x > 0 ? x >> lod : -( -x >> lod);
    }

◆ lodToInvScale()

static qreal KisLodTransformBase::lodToInvScale ( int levelOfDetail )

inlinestatic

Definition at line 35 of file kis_lod_transform_base.h.

                                                  {
        return 1 << qMax(0, levelOfDetail);
    }

◆ lodToScale() [1/2]

static qreal KisLodTransformBase::lodToScale ( int levelOfDetail )

inlinestatic

Definition at line 31 of file kis_lod_transform_base.h.

                                               {
        return levelOfDetail > 0 ? 1.0 / (1 << qMax(0, levelOfDetail)) : 1.0;
    }

◆ lodToScale() [2/2]

template<class PaintDeviceTypeSP >

static qreal KisLodTransformBase::lodToScale ( PaintDeviceTypeSP device )

inlinestatic

Definition at line 40 of file kis_lod_transform_base.h.

                                                      {
        return lodToScale(device->defaultBounds()->currentLevelOfDetail());
    }

◆ map() [1/3]

QRect KisLodTransformBase::map ( const QRect & rc ) const

inline

Definition at line 48 of file kis_lod_transform_base.h.

                                     {
        return m_transform.mapRect(rc);
    }

◆ map() [2/3]

QRectF KisLodTransformBase::map ( const QRectF & rc ) const

inline

Definition at line 44 of file kis_lod_transform_base.h.

                                       {
        return m_transform.mapRect(rc);
    }

◆ map() [3/3]

template<class T >

T KisLodTransformBase::map ( const T & object ) const

inline

Definition at line 63 of file kis_lod_transform_base.h.

                                 {
        return m_transform.map(object);
    }

◆ mapInverted() [1/2]

QRect KisLodTransformBase::mapInverted ( const QRect & rc ) const

inline

Definition at line 56 of file kis_lod_transform_base.h.

                                             {
        return m_transform.inverted().mapRect(rc);
    }

◆ mapInverted() [2/2]

QRectF KisLodTransformBase::mapInverted ( const QRectF & rc ) const

inline

Definition at line 52 of file kis_lod_transform_base.h.

                                               {
        return m_transform.inverted().mapRect(rc);
    }

◆ scaledRect()

static QRect KisLodTransformBase::scaledRect	(	const QRect &	srcRect,
		int	lod )

inlinestatic

Definition at line 91 of file kis_lod_transform_base.h.

                                                                  {
        qint32 x1, y1, x2, y2;
        srcRect.getCoords(&x1, &y1, &x2, &y2);
 
        KIS_ASSERT_RECOVER_NOOP(!(x1 & 1));
        KIS_ASSERT_RECOVER_NOOP(!(y1 & 1));
        KIS_ASSERT_RECOVER_NOOP(!((x2 + 1) & 1));
        KIS_ASSERT_RECOVER_NOOP(!((y2 + 1) & 1));
 
        x1 = divideSafe(x1, lod);
        y1 = divideSafe(y1, lod);
        x2 = divideSafe(x2 + 1, lod) - 1;
        y2 = divideSafe(y2 + 1, lod) - 1;
 
        QRect rect;
        rect.setCoords(x1, y1, x2, y2);
 
        return rect;
    }

References KIS_ASSERT_RECOVER_NOOP.

◆ scaleToLod()

static int KisLodTransformBase::scaleToLod	(	qreal	scale,
		int	maxLod )

inlinestatic

Definition at line 27 of file kis_lod_transform_base.h.

                                                   {
        return qMin(maxLod, qMax(0, qFloor(std::log2(1.0 / scale))));
    }

◆ transform()

QTransform KisLodTransformBase::transform ( ) const

inline

Definition at line 136 of file kis_lod_transform_base.h.

                                 {
        return m_transform;
    }

◆ upscaledRect()

static QRect KisLodTransformBase::upscaledRect	(	const QRect &	srcRect,
		int	lod )

inlinestatic

Definition at line 111 of file kis_lod_transform_base.h.

                                                             {
        qint32 x1, y1, x2, y2;
        srcRect.getCoords(&x1, &y1, &x2, &y2);
 
        x2++;
        y2++;
 
        x1 <<= lod;
        y1 <<= lod;
        x2 <<= lod;
        y2 <<= lod;
 
        x2--;
        y2--;
 
        QRect rect;
        rect.setCoords(x1, y1, x2, y2);
 
        return rect;
    }

Friends And Related Symbol Documentation

◆ KisRectsGrid

friend class KisRectsGrid

friend

Definition at line 141 of file kis_lod_transform_base.h.

Member Data Documentation

◆ m_levelOfDetail

int KisLodTransformBase::m_levelOfDetail

protected

Definition at line 168 of file kis_lod_transform_base.h.

◆ m_transform

QTransform KisLodTransformBase::m_transform

protected

Definition at line 167 of file kis_lod_transform_base.h.

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

libs/global/kis_lod_transform_base.h

Public Member Functions

Static Public Member Functions

Protected Attributes

Static Private Member Functions

Friends

Detailed Description

Constructor & Destructor Documentation

◆ KisLodTransformBase()

Member Function Documentation

◆ alignByPow2ButOneHi()

◆ alignByPow2Lo()

◆ alignedRect()

◆ coordToLodCoord()

◆ divideSafe()

◆ lodToInvScale()

◆ lodToScale() [1/2]

◆ lodToScale() [2/2]

◆ map() [1/3]

◆ map() [2/3]

◆ map() [3/3]

◆ mapInverted() [1/2]

◆ mapInverted() [2/2]

◆ scaledRect()

◆ scaleToLod()

◆ transform()

◆ upscaledRect()

Friends And Related Symbol Documentation

◆ KisRectsGrid

Member Data Documentation

◆ m_levelOfDetail

◆ m_transform