Access trait for contiguous linear CVB image planes. More...

#include <cvb/vpat.hpp>

Inherits ValueAccessBase< ArrayAccess >.

Classes
class	Column
	A single column. More...

class	Row
	A single row. More...

Public Member Functions
	ArrayAccess () noexcept

LinearAccessData	NewMoved (const Rect< int > newAoi) const noexcept
	Creates a new, moved linear access object. More...

ArrayAccess	NewMoved (int idx) const noexcept
	Creates a new, moved array access object. More...

CVB_FORCE_INLINE std::uint8_t *	BasePtr () const noexcept
	Gets the address of the first pixel of the plane. More...

CVB_FORCE_INLINE std::intptr_t	XInc () const noexcept
	Gets the offset to the next pixel on this line in this plane. More...

CVB_FORCE_INLINE std::intptr_t	YInc () const noexcept
	Gets the offset to the next pixel on the next line in this plane. More...

CVB_FORCE_INLINE int	Width () const noexcept
	Gets the width of the buffer, this access operates on. More...

bool	Valid () const noexcept
	Gets whether this linear access object is valid. More...

	operator bool () const noexcept
	Gets whether this linear access object is valid. More...

CVB_FORCE_INLINE const void *	operator() (int x, int y) const noexcept
	Coordinate pixel access operator. More...

CVB_FORCE_INLINE void *	operator() (int x, int y) noexcept
	Coordinate pixel access operator. More...

CVB_FORCE_INLINE const void *	operator[] (int idx) const noexcept
	Index pixel access operator. More...

CVB_FORCE_INLINE void *	operator[] (int idx) noexcept
	Index pixel access operator. More...

Row	RowAt (int y) const noexcept
	Gets the ArrayAccess::Row at y. More...

Column	ColumnAt (int x) const noexcept
	Gets the ArrayAccess::Column at x. More...

Public Member Functions inherited from ValueAccessBase< ArrayAccess >
const Type &	Value (int x, int y) const noexcept
	Gets a pixel value at a given position. More...

Type &	Value (int x, int y) noexcept
	Gets a settable pixel value at a given position. More...

const Type &	Value (Point2D< int > position) const noexcept
	Gets a pixel value at a given position. More...

Type &	Value (Point2D< int > position) noexcept
	Gets a settable pixel value at a given position. More...

Static Public Member Functions
template<class PLANE_T >
static ArrayAccess	FromPlane (const PLANE_T &plane) noexcept
	Tries to get a valid ArrayAccess trait from the given plane. More...

static ArrayAccess	FromLinearAccess (const LinearAccessData &access, Size2D< int > size) noexcept
	Tries to get a valid ArrayAccess trait from the given access. More...

static ArrayAccess	FromVpat (const Vpat &access, Size2D< int > size, DataType dataType) noexcept
	Tries to get a valid ArrayAccess trait from the given VPAT access. More...

Related Functions
(Note that these are not member functions.)
bool	operator!= (const ArrayAccess &lhs, const ArrayAccess &rhs) noexcept
	Inequality operator. More...

bool	operator== (const ArrayAccess &lhs, const ArrayAccess &rhs) noexcept
	Equality operator. More...

bool	IsInterleaved (size_t bytesPerPixel, const ArrayAccess &access0, const ArrayAccess &access1) noexcept

template<class... ACCESSES>
bool	IsInterleaved (size_t bytesPerPixel, const ArrayAccess &access0, const ArrayAccess &access1, const ACCESSES &... accs) noexcept

Detailed Description

Access trait for contiguous linear CVB image planes.

Constructor & Destructor Documentation

◆ ArrayAccess()

ArrayAccess ( )

inlinedefaultnoexcept

Default ctor of invalid access data.

Postcondition: Valid() == false

Member Function Documentation

◆ BasePtr()

CVB_FORCE_INLINE std::uint8_t * BasePtr ( ) const

inlinenoexcept

Gets the address of the first pixel of the plane.

Returns: Address of the first pixel of the plane.

◆ ColumnAt()

Column ColumnAt ( int x ) const

inlinenoexcept

Gets the ArrayAccess::Column at x.

Precondition: x must be between 0 and less than the allowed width.

Parameters

[in] x Pixel column.

Returns: Column object at line x.

◆ FromLinearAccess()

ArrayAccess FromLinearAccess	(	const LinearAccessData &	access,
		Size2D< int >	size
	)

inlinestaticnoexcept

Tries to get a valid ArrayAccess trait from the given access.

Parameters

[in]	access	Linear access to analyze.
[in]	size	Image dimensions of the given access.

Returns: Valid ArrayAccess if the linear access is also array-like; invalid one otherwise.

◆ FromPlane()

ArrayAccess FromPlane ( const PLANE_T & plane )

inlinestaticnoexcept

Tries to get a valid ArrayAccess trait from the given plane.

Can be extended to support custom plane types T by implementing Cvb::PlaneTraits<T>.

Template Parameters

PLANE_T The type of the plane to get the access from.

Parameters

[in] plane Plane to access.

Returns: Valid ArrayAccess if the layout is linear and array-like; invalid one otherwise.

◆ FromVpat()

ArrayAccess FromVpat	(	const Vpat &	access,
		Size2D< int >	size,
		DataType	dataType
	)

inlinestaticnoexcept

Tries to get a valid ArrayAccess trait from the given VPAT access.

Parameters

[in]	access	Base address in conjunction with VPAT.
[in]	size	Image dimensions of the given VPAT access.
[in]	dataType	Data type of the image of the given vpat.

Returns: Valid ArrayAccess if VPAT access is linear and array-like; invalid one otherwise.

◆ NewMoved() [1/2]

LinearAccessData NewMoved ( const Rect< int > newAoi ) const

inlinenoexcept

Creates a new, moved linear access object.

Precondition: Valid() == true

Parameters

[in] newAoi Offset and new size in pixels to move this access to.

Returns: New ArrayAccess object that is moved by (x, y).

◆ NewMoved() [2/2]

ArrayAccess NewMoved ( int idx ) const

inlinenoexcept

Creates a new, moved array access object.

Precondition: Valid() == true

Parameters

[in] idx Offset in pixels to move this array access to.

Returns: New ArrayAccess object that is moved by idx.

◆ operator bool()

operator bool ( ) const

inlineexplicitnoexcept

Gets whether this linear access object is valid.

Returns: true if Scan0() is not nullptr, XInc(), Width() and Height() are greater than 0.

◆ operator()() [1/2]

CVB_FORCE_INLINE const void * operator()	(	int	x,
		int	y
	)		const

inlinenoexcept

Coordinate pixel access operator.

Precondition: Valid() == true

Parameters

[in]	x	X coordinate coefficient in pixels.
[in]	y	Y coordinate coefficient in pixels.

Returns: Const pointer to pixel value.

◆ operator()() [2/2]

CVB_FORCE_INLINE void * operator()	(	int	x,
		int	y
	)

inlinenoexcept

Coordinate pixel access operator.

Precondition: Valid() == true

Parameters

[in]	x	X coordinate coefficient in pixels.
[in]	y	Y coordinate coefficient in pixels.

Returns: Mutable pointer to pixel value.

◆ operator[]() [1/2]

CVB_FORCE_INLINE const void * operator[] ( int idx ) const

inlinenoexcept

Index pixel access operator.

Precondition: Valid() == true

Parameters

[in] idx Index of the pixel.

Returns: Const pointer to pixel value.

◆ operator[]() [2/2]

CVB_FORCE_INLINE void * operator[] ( int idx )

inlinenoexcept

Index pixel access operator.

Precondition: Valid() == true

Parameters

[in] idx Index of the pixel.

Returns: Mutable pointer to pixel value.

◆ RowAt()

Row RowAt ( int y ) const

inlinenoexcept

Gets the ArrayAccess::Row at y.

Precondition: y must be between 0 and less than the allowed height.

Parameters

[in] y Pixel row.

Returns: Row object at line y.

◆ Valid()

bool Valid ( ) const

inlinenoexcept

Gets whether this linear access object is valid.

Returns: true if Scan0() is not nullptr, XInc(), Width() and Height() are greater than 0.

◆ Width()

CVB_FORCE_INLINE int Width ( ) const

inlinenoexcept

Gets the width of the buffer, this access operates on.

Returns: The number of pixels in a line in the buffer this access operates on.

◆ XInc()

CVB_FORCE_INLINE std::intptr_t XInc ( ) const

inlinenoexcept

Gets the offset to the next pixel on this line in this plane.

Returns: Offset to the next pixel in bytes.

◆ YInc()

CVB_FORCE_INLINE std::intptr_t YInc ( ) const

inlinenoexcept

Gets the offset to the next pixel on the next line in this plane.

Returns: Offset to the next line in bytes.

Friends And Related Function Documentation

◆ IsInterleaved() [1/2]

bool IsInterleaved	(	size_t	bytesPerPixel,
		const ArrayAccess &	access0,
		const ArrayAccess &	access1
	)

Parameters

[in]	bytesPerPixel	The number of bytes required per pixel.
[in]	access0	First ArrayAccess to test.
[in]	access1	Second ArrayAccess to test.

Returns: true if interleaved, false if not

◆ IsInterleaved() [2/2]

bool IsInterleaved	(	size_t	bytesPerPixel,
		const ArrayAccess &	access0,
		const ArrayAccess &	access1,
		const ACCESSES &...	accs
	)

[in]	accs	Arbitrary number of other ArrayAccesses. Returns whether the ArrayAccesses are directly interleaved.
[in]	bytesPerPixel	The number of bytes required per pixel.
[in]	access0	First ArrayAccess to test.
[in]	access1	Second ArrayAccess to test.

Returns: true if interleaved, false if not

◆ operator!=()

bool operator!=	(	const ArrayAccess &	lhs,
		const ArrayAccess &	rhs
	)

Parameters

[in]	lhs	Left hand side operand.
[in]	rhs	Right hand side operand.

Returns: true if lhs and rhs are unequal; false if equal.

◆ operator==()

bool operator==	(	const ArrayAccess &	lhs,
		const ArrayAccess &	rhs
	)

Parameters

[in]	lhs	Left hand side operand.
[in]	rhs	Right hand side operand.

Returns: true if lhs and rhs are equal; false if equal.

Classes

Public Member Functions

Static Public Member Functions

Related Functions

Detailed Description

Constructor & Destructor Documentation

◆ ArrayAccess()

Member Function Documentation

◆ BasePtr()

◆ ColumnAt()

◆ FromLinearAccess()

◆ FromPlane()

◆ FromVpat()

◆ NewMoved() [1/2]

◆ NewMoved() [2/2]

◆ operator bool()

◆ operator()() [1/2]

◆ operator()() [2/2]

◆ operator[]() [1/2]

◆ operator[]() [2/2]

◆ RowAt()

◆ Valid()

◆ Width()

◆ XInc()

◆ YInc()

Friends And Related Function Documentation

◆ IsInterleaved() [1/2]

◆ IsInterleaved() [2/2]

◆ operator!=()

◆ operator==()