SkM44 Class Reference

4x4 matrix used by SkCanvas and other parts of Skia. More...

#include <SkM44.h>

Public Types
enum	Uninitialized_Constructor { kUninitialized_Constructor }
enum	NaN_Constructor { kNaN_Constructor }

Public Member Functions
	SkM44 (const SkM44 &src)=default
SkM44 &	operator= (const SkM44 &src)=default
constexpr	SkM44 ()
	SkM44 (const SkM44 &a, const SkM44 &b)
	SkM44 (Uninitialized_Constructor)
constexpr	SkM44 (NaN_Constructor)
constexpr	SkM44 (SkScalar m0, SkScalar m4, SkScalar m8, SkScalar m12, SkScalar m1, SkScalar m5, SkScalar m9, SkScalar m13, SkScalar m2, SkScalar m6, SkScalar m10, SkScalar m14, SkScalar m3, SkScalar m7, SkScalar m11, SkScalar m15)
	The constructor parameters are in row-major order. More...
bool	operator== (const SkM44 &other) const
bool	operator!= (const SkM44 &other) const
void	getColMajor (SkScalar v[]) const
void	getRowMajor (SkScalar v[]) const
SkScalar	rc (int r, int c) const
void	setRC (int r, int c, SkScalar value)
SkV4	row (int i) const
SkV4	col (int i) const
void	setRow (int i, const SkV4 &v)
void	setCol (int i, const SkV4 &v)
SkM44 &	setIdentity ()
SkM44 &	setTranslate (SkScalar x, SkScalar y, SkScalar z=0)
SkM44 &	setScale (SkScalar x, SkScalar y, SkScalar z=1)
SkM44 &	setRotateUnitSinCos (SkV3 axis, SkScalar sinAngle, SkScalar cosAngle)
	Set this matrix to rotate about the specified unit-length axis vector, by an angle specified by its sin() and cos(). More...
SkM44 &	setRotateUnit (SkV3 axis, SkScalar radians)
	Set this matrix to rotate about the specified unit-length axis vector, by an angle specified in radians. More...
SkM44 &	setRotate (SkV3 axis, SkScalar radians)
	Set this matrix to rotate about the specified axis vector, by an angle specified in radians. More...
SkM44 &	setConcat (const SkM44 &a, const SkM44 &b)
SkM44 &	preConcat (const SkM44 &m)
SkM44 &	postConcat (const SkM44 &m)
void	normalizePerspective ()
	A matrix is categorized as 'perspective' if the bottom row is not [0, 0, 0, 1]. More...
bool	isFinite () const
	Returns true if all elements of the matrix are finite. More...
bool SK_WARN_UNUSED_RESULT	invert (SkM44 *inverse) const
	If this is invertible, return that in inverse and return true. More...
SkM44 SK_WARN_UNUSED_RESULT	transpose () const
void	dump () const
SkV4	map (float x, float y, float z, float w) const
SkV4	operator* (const SkV4 &v) const
SkV3	operator* (SkV3 v) const
SkMatrix	asM33 () const
	SkM44 (const SkMatrix &src)
SkM44 &	preTranslate (SkScalar x, SkScalar y, SkScalar z=0)
SkM44 &	postTranslate (SkScalar x, SkScalar y, SkScalar z=0)
SkM44 &	preScale (SkScalar x, SkScalar y)
SkM44 &	preConcat (const SkMatrix &)

Static Public Member Functions
static SkM44	Rows (const SkV4 &r0, const SkV4 &r1, const SkV4 &r2, const SkV4 &r3)
static SkM44	Cols (const SkV4 &c0, const SkV4 &c1, const SkV4 &c2, const SkV4 &c3)
static SkM44	RowMajor (const SkScalar r[16])
static SkM44	ColMajor (const SkScalar c[16])
static SkM44	Translate (SkScalar x, SkScalar y, SkScalar z=0)
static SkM44	Scale (SkScalar x, SkScalar y, SkScalar z=1)
static SkM44	Rotate (SkV3 axis, SkScalar radians)

Friends
class	SkMatrixPriv
SkM44	operator* (const SkM44 &a, const SkM44 &b)

Detailed Description

4x4 matrix used by SkCanvas and other parts of Skia.

Skia assumes a right-handed coordinate system: +X goes to the right +Y goes down +Z goes into the screen (away from the viewer)

Member Enumeration Documentation

NaN_Constructor

enum SkM44::NaN_Constructor

Enumerator
kNaN_Constructor

Uninitialized_Constructor

enum SkM44::Uninitialized_Constructor

Enumerator
kUninitialized_Constructor

Constructor & Destructor Documentation

SkM44() [1/7]

SkM44::SkM44 ( const SkM44 &  src )

default

SkM44() [2/7]

constexpr SkM44::SkM44 ( )

inlineconstexpr

SkM44() [3/7]

SkM44::SkM44 ( const SkM44 &  a, const SkM44 &  b  )

inline

SkM44() [4/7]

SkM44::SkM44 ( Uninitialized_Constructor  )

inline

SkM44() [5/7]

constexpr SkM44::SkM44 ( NaN_Constructor  )

inlineconstexpr

SkM44() [6/7]

constexpr SkM44::SkM44 ( SkScalar  m0, SkScalar  m4, SkScalar  m8, SkScalar  m12, SkScalar  m1, SkScalar  m5, SkScalar  m9, SkScalar  m13, SkScalar  m2, SkScalar  m6, SkScalar  m10, SkScalar  m14, SkScalar  m3, SkScalar  m7, SkScalar  m11, SkScalar  m15  )

inlineconstexpr

The constructor parameters are in row-major order.

SkM44() [7/7]

SkM44::SkM44 ( const SkMatrix &  src )

inlineexplicit

Member Function Documentation

asM33()

SkMatrix SkM44::asM33 ( ) const

inline

col()

SkV4 SkM44::col ( int  i ) const

inline

ColMajor()

static SkM44 SkM44::ColMajor ( const SkScalar  c[16] )

inlinestatic

Cols()

static SkM44 SkM44::Cols ( const SkV4 &  c0, const SkV4 &  c1, const SkV4 &  c2, const SkV4 &  c3  )

inlinestatic

dump()

void SkM44::dump

(

)

const

getColMajor()

void SkM44::getColMajor ( SkScalar  v[] ) const

inline

getRowMajor()

void SkM44::getRowMajor

(

SkScalar

v[]

)

const

invert()

bool SK_WARN_UNUSED_RESULT SkM44::invert

(

SkM44 *

inverse

)

const

If this is invertible, return that in inverse and return true.

If it is not invertible, return false and leave the inverse parameter unchanged.

isFinite()

bool SkM44::isFinite ( ) const

inline

Returns true if all elements of the matrix are finite.

Returns false if any element is infinity, or NaN.

Returns

true if matrix has only finite elements

map()

SkV4 SkM44::map	(	float	x,
		float	y,
		float	z,
		float	w
	)		const

normalizePerspective()

void SkM44::normalizePerspective

(

)

A matrix is categorized as 'perspective' if the bottom row is not [0, 0, 0, 1].

For most uses, a bottom row of [0, 0, 0, X] behaves like a non-perspective matrix, though it will be categorized as perspective. Calling normalizePerspective() will change the matrix such that, if its bottom row was [0, 0, 0, X], it will be changed to [0, 0, 0, 1] by scaling the rest of the matrix by 1/X.

| A B C D | | A/X B/X C/X D/X | | E F G H | -> | E/X F/X G/X H/X | for X != 0 | I J K L | | I/X J/X K/X L/X | | 0 0 0 X | | 0 0 0 1 |

operator!=()

bool SkM44::operator!= ( const SkM44 &  other ) const

inline

operator*() [1/2]

SkV4 SkM44::operator* ( const SkV4 &  v ) const

inline

operator*() [2/2]

SkV3 SkM44::operator* ( SkV3  v ) const

inline

operator=()

SkM44& SkM44::operator= ( const SkM44 &  src )

default

operator==()

bool SkM44::operator==

(

const SkM44 &

other

)

const

postConcat()

SkM44& SkM44::postConcat ( const SkM44 &  m )

inline

postTranslate()

SkM44& SkM44::postTranslate	(	SkScalar	x,
		SkScalar	y,
		SkScalar	z = 0
	)

preConcat() [1/2]

SkM44& SkM44::preConcat ( const SkM44 &  m )

inline

preConcat() [2/2]

SkM44& SkM44::preConcat

(

const SkMatrix &

)

preScale()

SkM44& SkM44::preScale	(	SkScalar	x,
		SkScalar	y
	)

preTranslate()

SkM44& SkM44::preTranslate	(	SkScalar	x,
		SkScalar	y,
		SkScalar	z = 0
	)

rc()

SkScalar SkM44::rc ( int  r, int  c  ) const

inline

Rotate()

static SkM44 SkM44::Rotate ( SkV3  axis, SkScalar  radians  )

inlinestatic

row()

SkV4 SkM44::row ( int  i ) const

inline

RowMajor()

static SkM44 SkM44::RowMajor ( const SkScalar  r[16] )

inlinestatic

Rows()

static SkM44 SkM44::Rows ( const SkV4 &  r0, const SkV4 &  r1, const SkV4 &  r2, const SkV4 &  r3  )

inlinestatic

Scale()

static SkM44 SkM44::Scale ( SkScalar  x, SkScalar  y, SkScalar  z = 1  )

inlinestatic

setCol()

void SkM44::setCol ( int  i, const SkV4 &  v  )

inline

setConcat()

SkM44& SkM44::setConcat	(	const SkM44 &	a,
		const SkM44 &	b
	)

setIdentity()

SkM44& SkM44::setIdentity ( )

inline

setRC()

void SkM44::setRC ( int  r, int  c, SkScalar  value  )

inline

setRotate()

SkM44& SkM44::setRotate	(	SkV3	axis,
		SkScalar	radians
	)

Set this matrix to rotate about the specified axis vector, by an angle specified in radians.

Note: axis is not assumed to be unit-length, so it will be normalized internally. If axis is already unit-length, call setRotateAboutUnitRadians() instead.

setRotateUnit()

SkM44& SkM44::setRotateUnit ( SkV3  axis, SkScalar  radians  )

inline

Set this matrix to rotate about the specified unit-length axis vector, by an angle specified in radians.

This does not attempt to verify that axis.length() == 1.

setRotateUnitSinCos()

SkM44& SkM44::setRotateUnitSinCos	(	SkV3	axis,
		SkScalar	sinAngle,
		SkScalar	cosAngle
	)

Set this matrix to rotate about the specified unit-length axis vector, by an angle specified by its sin() and cos().

This does not attempt to verify that axis.length() == 1 or that the sin,cos values are correct.

setRow()

void SkM44::setRow ( int  i, const SkV4 &  v  )

inline

setScale()

SkM44& SkM44::setScale ( SkScalar  x, SkScalar  y, SkScalar  z = 1  )

inline

setTranslate()

SkM44& SkM44::setTranslate ( SkScalar  x, SkScalar  y, SkScalar  z = 0  )

inline

Translate()

static SkM44 SkM44::Translate ( SkScalar  x, SkScalar  y, SkScalar  z = 0  )

inlinestatic

transpose()

SkM44 SK_WARN_UNUSED_RESULT SkM44::transpose

(

)

const

Friends And Related Function Documentation

operator*

SkM44 operator* ( const SkM44 &  a, const SkM44 &  b  )

friend

SkMatrixPriv

friend class SkMatrixPriv

friend

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

• /CHECKOUT/include/core/SkM44.h