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Added in API level 1

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ColorMatrix

public class ColorMatrix
extends Object

java.lang.Object
↳	android.graphics.ColorMatrix

4x5 matrix for transforming the color and alpha components of a Bitmap. The matrix can be passed as single array, and is treated as follows:

  [ a, b, c, d, e,
    f, g, h, i, j,
    k, l, m, n, o,
    p, q, r, s, t ]

When applied to a color [R, G, B, A], the resulting color is computed as:

   R’ = a*R + b*G + c*B + d*A + e;
   G’ = f*R + g*G + h*B + i*A + j;
   B’ = k*R + l*G + m*B + n*A + o;
   A’ = p*R + q*G + r*B + s*A + t;

That resulting color [R’, G’, B’, A’] then has each channel clamped to the 0 to 255 range.

The sample ColorMatrix below inverts incoming colors by scaling each channel by -1, and then shifting the result up by 255 to remain in the standard color space.

   [ -1, 0, 0, 0, 255,
     0, -1, 0, 0, 255,
     0, 0, -1, 0, 255,
     0, 0, 0, 1, 0 ]

Summary

Public constructors
`ColorMatrix()` Create a new colormatrix initialized to identity (as if reset() had been called).
`ColorMatrix(float[] src)` Create a new colormatrix initialized with the specified array of values.
`ColorMatrix(ColorMatrix src)` Create a new colormatrix initialized with the specified colormatrix.

Public methods
`final float[]`	`getArray()` Return the array of floats representing this colormatrix.
`void`	`postConcat(ColorMatrix postmatrix)` Concat this colormatrix with the specified postmatrix.
`void`	`preConcat(ColorMatrix prematrix)` Concat this colormatrix with the specified prematrix.
`void`	`reset()` Set this colormatrix to identity: [ 1 0 0 0 0 - red vector 0 1 0 0 0 - green vector 0 0 1 0 0 - blue vector 0 0 0 1 0 ] - alpha vector
`void`	`set(float[] src)` Assign the array of floats into this matrix, copying all of its values.
`void`	`set(ColorMatrix src)` Assign the src colormatrix into this matrix, copying all of its values.
`void`	`setConcat(ColorMatrix matA, ColorMatrix matB)` Set this colormatrix to the concatenation of the two specified colormatrices, such that the resulting colormatrix has the same effect as applying matB and then applying matA.
`void`	`setRGB2YUV()` Set the matrix to convert RGB to YUV
`void`	`setRotate(int axis, float degrees)` Set the rotation on a color axis by the specified values.
`void`	`setSaturation(float sat)` Set the matrix to affect the saturation of colors.
`void`	`setScale(float rScale, float gScale, float bScale, float aScale)` Set this colormatrix to scale by the specified values.
`void`	`setYUV2RGB()` Set the matrix to convert from YUV to RGB

Inherited methods

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public constructors

ColorMatrix

Added in API level 1

ColorMatrix ()

Create a new colormatrix initialized to identity (as if reset() had been called).

ColorMatrix

Added in API level 1

ColorMatrix (float[] src)

Create a new colormatrix initialized with the specified array of values.

Parameters
`src`	`float`

ColorMatrix

Added in API level 1

ColorMatrix (ColorMatrix src)

Create a new colormatrix initialized with the specified colormatrix.

Parameters
`src`	`ColorMatrix`

Public methods

getArray

Added in API level 1

float[] getArray ()

Return the array of floats representing this colormatrix.

Returns
`float[]`

postConcat

Added in API level 1

void postConcat (ColorMatrix postmatrix)

Concat this colormatrix with the specified postmatrix.

This is logically the same as calling setConcat(postmatrix, this);

Parameters
`postmatrix`	`ColorMatrix`

preConcat

Added in API level 1

void preConcat (ColorMatrix prematrix)

Concat this colormatrix with the specified prematrix.

This is logically the same as calling setConcat(this, prematrix);

Parameters
`prematrix`	`ColorMatrix`

reset

Added in API level 1

void reset ()

Set this colormatrix to identity:

 [ 1 0 0 0 0   - red vector
   0 1 0 0 0   - green vector
   0 0 1 0 0   - blue vector
   0 0 0 1 0 ] - alpha vector

set

Added in API level 1

void set (float[] src)

Assign the array of floats into this matrix, copying all of its values.

Parameters
`src`	`float`

set

Added in API level 1

void set (ColorMatrix src)

Assign the src colormatrix into this matrix, copying all of its values.

Parameters
`src`	`ColorMatrix`

setConcat

Added in API level 1

void setConcat (ColorMatrix matA, 
                ColorMatrix matB)

Set this colormatrix to the concatenation of the two specified colormatrices, such that the resulting colormatrix has the same effect as applying matB and then applying matA.

It is legal for either matA or matB to be the same colormatrix as this.

Parameters
`matA`	`ColorMatrix`
`matB`	`ColorMatrix`

setRGB2YUV

Added in API level 1

void setRGB2YUV ()

Set the matrix to convert RGB to YUV

setRotate

Added in API level 1

void setRotate (int axis, 
                float degrees)

Set the rotation on a color axis by the specified values.

axis=0 correspond to a rotation around the RED color axis=1 correspond to a rotation around the GREEN color axis=2 correspond to a rotation around the BLUE color

Parameters
`axis`	`int`
`degrees`	`float`

setSaturation

Added in API level 1

void setSaturation (float sat)

Set the matrix to affect the saturation of colors.

Parameters
`sat`	`float`: A value of 0 maps the color to gray-scale. 1 is identity.

setScale

Added in API level 1

void setScale (float rScale, 
                float gScale, 
                float bScale, 
                float aScale)

Set this colormatrix to scale by the specified values.

Parameters
`rScale`	`float`
`gScale`	`float`
`bScale`	`float`
`aScale`	`float`

setYUV2RGB

Added in API level 1

void setYUV2RGB ()

Set the matrix to convert from YUV to RGB

Interfaces

Classes

Enums

Exceptions

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ColorMatrix

Summary

Public constructors

Public methods

Inherited methods

Public constructors

ColorMatrix

ColorMatrix

ColorMatrix

Public methods

getArray

postConcat

preConcat

reset

set

set

setConcat

setRGB2YUV

setRotate

setSaturation

setScale

setYUV2RGB