CartoType::TTransform Class Reference

#include <cartotype_transform.h>

List of all members.

Public Member Functions
	TTransform ()
bool	IsIdentity () const
void	SetIdentity ()
TFixed	A () const
TFixed	B () const
TFixed	C () const
TFixed	D () const
TFixed	Tx () const
TFixed	Ty () const
CT_IMPORT	TTransform (TFixed aA, TFixed aB, TFixed aC, TFixed aD, TFixed aTx, TFixed aTy)
CT_IMPORT bool	operator== (const TTransform &aTransform) const
bool	operator!= (const TTransform &aTransform) const
CT_IMPORT void	Concat (const TTransform &aTransform)
CT_IMPORT void	Transform (TPoint &aPoint) const
CT_IMPORT void	TransformPointIn64ths (TPoint &aPoint) const
CT_IMPORT void	Transform (TFixed &aX, TFixed &aY) const
void	Transform (TPointFixed &aPoint) const
CT_IMPORT void	ExtractScale (TFixed &aXScale, TFixed &aYScale)
CT_IMPORT void	Rotate (TFixed aX, TFixed aY)
CT_IMPORT void	Scale (TFixed aXScale, TFixed aYScale)
CT_IMPORT void	Translate (TFixed aXOffset, TFixed aYOffset)
CT_IMPORT TResult	Invert ()
int32	Type () const

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Detailed Description

A two-dimensional affine transform. The parameter names A, B, C, D, Tx, Ty are those used in the PostScript Language Reference Manual.

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Constructor & Destructor Documentation

CartoType::TTransform::TTransform

(

)

[inline]

Create an identity transform.

CT_EXPORT TTransform::TTransform	(	TFixed	aA,
		TFixed	aB,
		TFixed	aC,
		TFixed	aD,
		TFixed	aTx,
		TFixed	aTy
	)

Create a transform by specifying all six parameters.

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Member Function Documentation

TFixed CartoType::TTransform::A

(

)

const [inline]

Return the A (x scale) parameter.

TFixed CartoType::TTransform::B

(

)

const [inline]

Return the B (y shear) parameter.

TFixed CartoType::TTransform::C

(

)

const [inline]

Return the C (x shear) parameter.

CT_EXPORT void TTransform::Concat

(

const TTransform &

aTransform

)

Set the transform to the result of concatenating aTransform to it.

TFixed CartoType::TTransform::D

(

)

const [inline]

Return the D (y scale) parameter.

CT_EXPORT void TTransform::ExtractScale	(	TFixed &	aXScale,
		TFixed &	aYScale
	)

Remove the non-negative scale components from a transform and return them in aXScale and aYScale. There is no unique way of doing this, but the method chosen here minimises shear and prefers to decompose into scale plus rotation.

CT_EXPORT TResult TTransform::Invert

(

)

Invert a transform if it is invertible. If not, convert the transform to the identity transform and return KErrorNoInverse.

bool CartoType::TTransform::IsIdentity

(

)

const [inline]

Return true if the transform is identity (has no effect).

bool CartoType::TTransform::operator!=

(

const TTransform &

aTransform

)

const [inline]

The inequality operator.

CT_EXPORT bool TTransform::operator==

(

const TTransform &

aTransform

)

const

The equality operator.

CT_EXPORT void TTransform::Rotate	(	TFixed	aX,
		TFixed	aY
	)

Rotate a transform by the amount defined by the vector (aX,aY), where zero rotation is the vector (1,0);

CT_EXPORT void TTransform::Scale	(	TFixed	aXScale,
		TFixed	aYScale
	)

Scale a transform by aXScale and aYScale. Do nothing if either XScale or YScale is zero.

void CartoType::TTransform::SetIdentity

(

)

[inline]

Set the transform to identity.

CT_EXPORT void TTransform::Transform

(

TPoint &

aPoint

)

const

Transform a point.

CT_EXPORT void TTransform::Transform	(	TFixed &	aX,
		TFixed &	aY
	)		const

Transform a point specified as two fixed-point numbers.

void CartoType::TTransform::Transform

(

TPointFixed &

aPoint

)

const [inline]

Transform a TPointFixed object in place.

CT_EXPORT void TTransform::TransformPointIn64ths

(

TPoint &

aPoint

)

const

Transform a point in 64ths of pixels, the offsets in the transform itself being in pixels.

CT_EXPORT void TTransform::Translate	(	TFixed	aXOffset,
		TFixed	aYOffset
	)

Translate a transform by aXOffset and aYOffset.

TFixed CartoType::TTransform::Tx

(

)

const [inline]

Return the TX (x translation) parameter.

TFixed CartoType::TTransform::Ty

(

)

const [inline]

Return the TY (y translation) parameter.

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

• cartotype_transform.h
• cartotype_transform.cpp