KExiv2Iface::RotationMatrix

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#include <KExiv2/RotationMatrix>

Public Types

enum  TransformationAction {
  NoTransformation = 0 , FlipHorizontal = 1 , FlipVertical = 2 , Rotate90 = 5 ,
  Rotate180 = 6 , Rotate270 = 7
}
 

Public Member Functions

 RotationMatrix ()
 
 RotationMatrix (int m11, int m12, int m21, int m22)
 
 RotationMatrix (KExiv2::ImageOrientation exifOrientation)
 
 RotationMatrix (TransformationAction action)
 
KExiv2::ImageOrientation exifOrientation () const
 
bool isNoTransform () const
 
bool operator!= (const RotationMatrix &ma) const
 
RotationMatrixoperator*= (const RotationMatrix &ma)
 
RotationMatrixoperator*= (KExiv2::ImageOrientation exifOrientation)
 
RotationMatrixoperator*= (QList< TransformationAction > actions)
 
RotationMatrixoperator*= (TransformationAction action)
 
bool operator== (const RotationMatrix &ma) const
 
QTransform toTransform () const
 
QList< TransformationActiontransformations () const
 

Static Public Member Functions

static QTransform toTransform (KExiv2::ImageOrientation orientation)
 

Protected Member Functions

void set (int m11, int m12, int m21, int m22)
 

Protected Attributes

int m [2][2]
 

Detailed Description

RotationMatrix.

Definition at line 35 of file rotationmatrix.h.

Member Enumeration Documentation

◆ TransformationAction

This describes single transform primitives.

Note some of the defined Exif rotation flags combine two of these actions. The enum values correspond to those defined as JXFORM_CODE in the often used the JPEG tool transupp.h.

Enumerator
FlipHorizontal 

no transformation

FlipVertical 

horizontal flip

Rotate90 

vertical flip

Rotate180 

90-degree clockwise rotation

Rotate270 

180-degree rotation

Definition at line 46 of file rotationmatrix.h.

Constructor & Destructor Documentation

◆ RotationMatrix() [1/4]

KExiv2Iface::RotationMatrix::RotationMatrix ( )

Constructs the identity matrix (the matrix describing no transformation)

Definition at line 114 of file rotationmatrix.cpp.

◆ RotationMatrix() [2/4]

KExiv2Iface::RotationMatrix::RotationMatrix ( TransformationAction action)

Returns the matrix corresponding to the given TransformationAction.

Definition at line 119 of file rotationmatrix.cpp.

◆ RotationMatrix() [3/4]

KExiv2Iface::RotationMatrix::RotationMatrix ( KExiv2::ImageOrientation exifOrientation)

Returns the matrix corresponding to the given TransformationAction.

Definition at line 124 of file rotationmatrix.cpp.

◆ RotationMatrix() [4/4]

KExiv2Iface::RotationMatrix::RotationMatrix ( int m11,
int m12,
int m21,
int m22 )

Definition at line 129 of file rotationmatrix.cpp.

Member Function Documentation

◆ exifOrientation()

KExiv2::ImageOrientation KExiv2Iface::RotationMatrix::exifOrientation ( ) const

Returns the Exif orienation flag describing this matrix.

Returns ORIENTATION_UNSPECIFIED if no flag matches this matrix.

Definition at line 231 of file rotationmatrix.cpp.

◆ isNoTransform()

bool KExiv2Iface::RotationMatrix::isNoTransform ( ) const

Returns true of this matrix describes no transformation (is the identity matrix)

Definition at line 142 of file rotationmatrix.cpp.

◆ operator!=()

bool KExiv2Iface::RotationMatrix::operator!= ( const RotationMatrix & ma) const

Definition at line 163 of file rotationmatrix.cpp.

◆ operator*=() [1/4]

RotationMatrix & KExiv2Iface::RotationMatrix::operator*= ( const RotationMatrix & ma)

Definition at line 147 of file rotationmatrix.cpp.

◆ operator*=() [2/4]

RotationMatrix & KExiv2Iface::RotationMatrix::operator*= ( KExiv2::ImageOrientation exifOrientation)

Applies the given Exif orientation flag to this matrix.

Definition at line 183 of file rotationmatrix.cpp.

◆ operator*=() [3/4]

RotationMatrix & KExiv2Iface::RotationMatrix::operator*= ( QList< TransformationAction > actions)

Applies the given transform actions to this matrix.

Definition at line 173 of file rotationmatrix.cpp.

◆ operator*=() [4/4]

RotationMatrix & KExiv2Iface::RotationMatrix::operator*= ( TransformationAction action)

Applies the given transform to this matrix.

Definition at line 168 of file rotationmatrix.cpp.

◆ operator==()

bool KExiv2Iface::RotationMatrix::operator== ( const RotationMatrix & ma) const

Definition at line 155 of file rotationmatrix.cpp.

◆ set()

void KExiv2Iface::RotationMatrix::set ( int m11,
int m12,
int m21,
int m22 )
protected

Definition at line 134 of file rotationmatrix.cpp.

◆ toTransform() [1/2]

QTransform KExiv2Iface::RotationMatrix::toTransform ( ) const

Returns a QTransform representing this matrix.

Since
5.1

Definition at line 270 of file rotationmatrix.cpp.

◆ toTransform() [2/2]

QTransform KExiv2Iface::RotationMatrix::toTransform ( KExiv2::ImageOrientation orientation)
static

Returns a QTransform for the given Exif orientation.

Since
5.1

Definition at line 275 of file rotationmatrix.cpp.

◆ transformations()

QList< RotationMatrix::TransformationAction > KExiv2Iface::RotationMatrix::transformations ( ) const

Returns the actions described by this matrix.

Converts the mathematically correct description into the primitive operations that can be carried out losslessly.

The order matters. Not all possible matrices are supported, but all those that can be combined by Exif rotation flags and the transform actions above. If isNoTransform() or the matrix is not supported returns an empty list.

Definition at line 191 of file rotationmatrix.cpp.

Member Data Documentation

◆ m

int KExiv2Iface::RotationMatrix::m[2][2]
protected

Definition at line 130 of file rotationmatrix.h.


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