java.lang.Object
- com.adobe.internal.pdftoolkit.core.types.ASObject
- - com.adobe.internal.pdftoolkit.core.types.ASMatrix

```
public class ASMatrix
extends ASObject
```
ASMatrix encapsulates an immutable PDF coordinate transfomation matrix, or CTM.

Constructor Summary

Constructors
Constructor	Description
`ASMatrix(double[] array)`	Constructs a new matrix of 2 columns, 3 rows from an array of doubles with the ordering ( a, b, c, d, x, y ) where x gives in x and y gives translation in y.
`ASMatrix(double a, double b, double c, double d, double x, double y)`	Constructs a new matrix of 2 columns, 3 rows (a, b, c, d, x, y).
`ASMatrix(ASMatrix B)`	Constructs a new matrix from another matrix (like clone)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`ASMatrix`	`concat(ASMatrix A)`	(left) multiply new transform with this (computes X * A, where X is the current transform)
`static ASMatrix`	`createIdentityMatrix()`	Returns an identity matrix.
`boolean`	`equals(ASMatrix t)`	Test for equality
`double`	`geta()`
`double`	`getb()`
`double`	`getc()`
`double`	`getd()`
`ASMatrix`	`getInverse()`	Find the matrix, B, that has the property: B * X = identity.
`ASMatrix`	`getUnitRotationMatrix()`
`double[]`	`getValues()`
`double`	`getx()`
`double`	`gety()`
`boolean`	`isIdentity()`	Test for Identity of the 4x4 matrix Exclusive of translation
`boolean`	`isIdentity6x6()`	Test for Identity of the 6x6 matrix Inclusive of translation
`boolean`	`isInvertable()`	Test for invertability
`void`	`mult(double px, double py, double[] output)`	Multiply a vector by our matrix.
`double`	`multGetX(double px, double py)`
`double`	`multGetY(double px, double py)`
`ASMatrix`	`preMultiply(double h, double v)`	Premultiply the current transform with a translation
`ASMatrix`	`preScale(double x)`
`ASMatrix`	`preScale(double sx, double sy)`	Premultiply the current transform with a scale
`ASMatrix`	`rotate(double angle)`	Concatentate the current transform with a rotate
`ASMatrix`	`scale(double x)`
`ASMatrix`	`scale(double sx, double sy)`	Concatentate the current transform with a scale
`ASMatrix`	`setItalicDegrees(double angle)`	Set an italic angle
`ASMatrix`	`setTranslate(double h, double v)`	Set an absolute translation
`String`	`toString()`	Converts this object to a String representation.
`ASMatrix`	`translate(double h, double v)`	Concatenate the current transform with a translate
`void`	`write(OutputByteStream outputByteStream)`	Writes the ASHexString in to the given OutputStream in the format expected by the PDF Spec.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - ASMatrix
```
public ASMatrix(double a,
                double b,
                double c,
                double d,
                double x,
                double y)
```
    Constructs a new matrix of 2 columns, 3 rows (a, b, c, d, x, y).
    
    Parameters:
    
    x - Translation in x
    
    y - Translation in y
  - ASMatrix
```
public ASMatrix(double[] array)
```
    Constructs a new matrix of 2 columns, 3 rows from an array of doubles with the ordering ( a, b, c, d, x, y ) where x gives in x and y gives translation in y.
  - ASMatrix
```
public ASMatrix(ASMatrix B)
```
    Constructs a new matrix from another matrix (like clone)
    
    Parameters:
    
    B - PDFAffineTransform
- Method Detail
  - createIdentityMatrix
```
public static ASMatrix createIdentityMatrix()
```
    Returns an identity matrix.
  - geta
```
public double geta()
```
  - getb
```
public double getb()
```
  - getc
```
public double getc()
```
  - getd
```
public double getd()
```
  - getx
```
public double getx()
```
  - gety
```
public double gety()
```
  - getValues
```
public double[] getValues()
```
  - equals
```
public boolean equals(ASMatrix t)
```
    Test for equality
  - isIdentity
```
public boolean isIdentity()
```
    Test for Identity of the 4x4 matrix Exclusive of translation
  - isIdentity6x6
```
public boolean isIdentity6x6()
```
    Test for Identity of the 6x6 matrix Inclusive of translation
  - isInvertable
```
public boolean isInvertable()
```
    Test for invertability
  - rotate
```
public ASMatrix rotate(double angle)
```
    Concatentate the current transform with a rotate
    
    Parameters:
    
    angle - Amount of rotation in radians.
  - scale
```
public ASMatrix scale(double sx,
                      double sy)
```
    Concatentate the current transform with a scale
  - scale
```
public ASMatrix scale(double x)
```
  - preScale
```
public ASMatrix preScale(double sx,
                         double sy)
```
    Premultiply the current transform with a scale
  - preScale
```
public ASMatrix preScale(double x)
```
  - translate
```
public ASMatrix translate(double h,
                          double v)
```
    Concatenate the current transform with a translate
  - preMultiply
```
public ASMatrix preMultiply(double h,
                            double v)
```
    Premultiply the current transform with a translation
  - setTranslate
```
public ASMatrix setTranslate(double h,
                             double v)
```
    Set an absolute translation
  - setItalicDegrees
```
public ASMatrix setItalicDegrees(double angle)
```
    Set an italic angle
  - mult
```
public void mult(double px,
                 double py,
                 double[] output)
```
    Multiply a vector by our matrix.
    
    Parameters:
    
    px - Along with py: input vector
    
    py - Along with px: input vector
    
    output - output vector -- must be at least size 2 (x is index 0, y is index 1)
  - multGetX
```
public double multGetX(double px,
                       double py)
```
  - multGetY
```
public double multGetY(double px,
                       double py)
```
  - concat
```
public ASMatrix concat(ASMatrix A)
```
    (left) multiply new transform with this (computes X * A, where X is the current transform)
    
    Parameters:
    
    A - new transform.
  - getInverse
```
public ASMatrix getInverse()
                    throws PDFInvalidParameterException
```
    Find the matrix, B, that has the property: B * X = identity.
    
    Throws:
    
    PDFInvalidParameterException - If the matrix does not have an inverse.
  - toString
```
public String toString()
```
    Converts this object to a String representation.
    
    Overrides:
    
    toString in class Object
  - write
```
public void write(OutputByteStream outputByteStream)
           throws PDFIOException
```
    Writes the ASHexString in to the given OutputStream in the format expected by the PDF Spec.
    
    Specified by:
    
    write in class ASObject
    
    Parameters:
    
    outputByteStream - OutputStream to write to.
    
    Throws:
    
    PDFIOException
    
    See Also:
    
    ASString
  - getUnitRotationMatrix
```
public ASMatrix getUnitRotationMatrix()
```

Class ASMatrix

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ASMatrix

ASMatrix

ASMatrix

Method Detail

createIdentityMatrix

geta

getb

getc

getd

getx

gety

getValues

equals

isIdentity

isIdentity6x6

isInvertable

rotate

scale

scale

preScale

preScale

translate

preMultiply

setTranslate

setItalicDegrees

mult

multGetX

multGetY

concat

getInverse

toString

write

getUnitRotationMatrix