nsStyleTransformMatrix Class Reference

#include <nsStyleTransformMatrix.h>

List of all members.

Public Member Functions
	nsStyleTransformMatrix ()
	Constructor sets the matrix to the identity.
gfxMatrix	GetThebesMatrix (const nsRect &aBounds, float aFactor) const
	Given a frame's bounding rectangle, returns a gfxMatrix corresponding to the transformation represented by this matrix.
nsStyleTransformMatrix &	operator*= (const nsStyleTransformMatrix &aOther)
	Multiplies this matrix by another matrix, in that order.
const nsStyleTransformMatrix	operator* (const nsStyleTransformMatrix &aOther) const
	Returns a new nsStyleTransformMatrix that is equal to one matrix multiplied by another matrix, in that order.
void	SetToTransformFunction (const nsCSSValue::Array *aData, nsStyleContext *aContext, nsPresContext *aPresContext, PRBool &aCanStoreInRuleTree)
	Given an nsCSSValue::Array* containing a -moz-transform function, updates this matrix to hold the value of that function.
void	SetToIdentity ()
	Sets this matrix to be the identity matrix.
float	GetMainMatrixEntry (PRInt32 aIndex) const
	Returns the value of the entry at the 2x2 submatrix of the transform matrix that defines the non-affine linear transform.
nscoord	GetXTranslation (const nsRect &aBounds) const
	Returns the value of the X or Y translation component of the matrix, given the specified bounds.
nscoord	GetYTranslation (const nsRect &aBounds) const
nscoord	GetCoordXTranslation () const
	Get the raw components used for GetXTranslation and GetYTranslation.
nscoord	GetCoordYTranslation () const
float	GetWidthRelativeXTranslation () const
float	GetWidthRelativeYTranslation () const
float	GetHeightRelativeXTranslation () const
float	GetHeightRelativeYTranslation () const
PRBool	operator== (const nsStyleTransformMatrix &aOther) const
	Returns whether the two matrices are equal or not.
PRBool	operator!= (const nsStyleTransformMatrix &aOther) const
Static Public Member Functions
static nsCSSKeyword	TransformFunctionOf (const nsCSSValue::Array *aData)
	Return the transform function, as an nsCSSKeyword, for the given nsCSSValue::Array from a transform list.
static nsStyleTransformMatrix	ReadTransforms (const nsCSSValueList *aList, nsStyleContext *aContext, nsPresContext *aPresContext, PRBool &aCanStoreInRuleTree)
	The same as SetToTransformFunction, but for a list of transform functions.

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Constructor & Destructor Documentation

nsStyleTransformMatrix::nsStyleTransformMatrix

(

)

Constructor sets the matrix to the identity.

---

Member Function Documentation

nscoord nsStyleTransformMatrix::GetCoordXTranslation

(

)

const [inline]

Get the raw components used for GetXTranslation and GetYTranslation.

nscoord nsStyleTransformMatrix::GetCoordYTranslation

(

)

const [inline]

float nsStyleTransformMatrix::GetHeightRelativeXTranslation

(

)

const [inline]

float nsStyleTransformMatrix::GetHeightRelativeYTranslation

(

)

const [inline]

float nsStyleTransformMatrix::GetMainMatrixEntry

(

PRInt32

aIndex

)

const [inline]

Returns the value of the entry at the 2x2 submatrix of the transform matrix that defines the non-affine linear transform.

The order is given as |elem[0] elem[2]| |elem[1] elem[3]|

Parameters:

aIndex

The element index.

Returns:

The value of the element at that index.

gfxMatrix nsStyleTransformMatrix::GetThebesMatrix	(	const nsRect &	aBounds,
		float	aFactor
	)			const

Given a frame's bounding rectangle, returns a gfxMatrix corresponding to the transformation represented by this matrix.

The transformation takes points in the frame's local space and converts them to points in the frame's transformed space.

Parameters:

	aBounds	The frame's bounding rectangle.
	aFactor	The number of app units per device pixel.

Returns:

A Thebes matrix corresponding to the transform.

float nsStyleTransformMatrix::GetWidthRelativeXTranslation

(

)

const [inline]

float nsStyleTransformMatrix::GetWidthRelativeYTranslation

(

)

const [inline]

nscoord nsStyleTransformMatrix::GetXTranslation

(

const nsRect &

aBounds

)

const

Returns the value of the X or Y translation component of the matrix, given the specified bounds.

Parameters:

aBounds

The bounds of the element.

Returns:

The value of the X or Ytranslation component.

nscoord nsStyleTransformMatrix::GetYTranslation

(

const nsRect &

aBounds

)

const

PRBool nsStyleTransformMatrix::operator!=

(

const nsStyleTransformMatrix &

aOther

)

const [inline]

const nsStyleTransformMatrix nsStyleTransformMatrix::operator*

(

const nsStyleTransformMatrix &

aOther

)

const

Returns a new nsStyleTransformMatrix that is equal to one matrix multiplied by another matrix, in that order.

If C is the result of A * B, then for any vector x, the equivalence C(x) = A(B(x)).

Parameters:

aOther

The matrix to multiply this matrix by.

Returns:

A new nsStyleTransformMatrix equal to this matrix multiplied by the other matrix.

nsStyleTransformMatrix& nsStyleTransformMatrix::operator*=

(

const nsStyleTransformMatrix &

aOther

)

Multiplies this matrix by another matrix, in that order.

If A' is the value of A after A *= B, then for any vector x, the equivalence A'(x) == A(B(x)) holds.

Parameters:

aOther

The matrix to multiply this matrix by.

Returns:

A reference to this matrix.

PRBool nsStyleTransformMatrix::operator==

(

const nsStyleTransformMatrix &

aOther

)

const

Returns whether the two matrices are equal or not.

Parameters:

aOther

The matrix to compare to.

Returns:

Whether the two matrices are equal.

static nsStyleTransformMatrix nsStyleTransformMatrix::ReadTransforms	(	const nsCSSValueList *	aList,
		nsStyleContext *	aContext,
		nsPresContext *	aPresContext,
		PRBool &	aCanStoreInRuleTree
	)			[static]

The same as SetToTransformFunction, but for a list of transform functions.

void nsStyleTransformMatrix::SetToIdentity

(

)

Sets this matrix to be the identity matrix.

void nsStyleTransformMatrix::SetToTransformFunction	(	const nsCSSValue::Array *	aData,
		nsStyleContext *	aContext,
		nsPresContext *	aPresContext,
		PRBool &	aCanStoreInRuleTree
	)

Given an nsCSSValue::Array* containing a -moz-transform function, updates this matrix to hold the value of that function.

Parameters:

	aData	The nsCSSValue::Array* containing the transform function.
	aContext	The style context, used for unit conversion.
	aPresContext	The presentation context, used for unit conversion.
	aCanStoreInRuleTree	Set to false if the result cannot be cached in the rule tree, otherwise untouched.

aContext and aPresContext may be null if all of the (non-percent) length values in aData are already known to have been converted to eCSSUnit_Pixel (as they are in an nsStyleAnimation::Value)

static nsCSSKeyword nsStyleTransformMatrix::TransformFunctionOf

(

const nsCSSValue::Array *

aData

)

[static]

Return the transform function, as an nsCSSKeyword, for the given nsCSSValue::Array from a transform list.

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

• nsStyleTransformMatrix.h