LutProperties


public final class LutProperties
extends Object

java.lang.Object
   ↳ android.hardware.LutProperties


Provides Lut properties of the device.

A Lut (Look-Up Table) is a pre-calculated table for color correction. Applications may be interested in the Lut properties exposed by this class to determine if the Lut(s) they select using SurfaceControl.Transaction.setLuts(SurfaceControl, DisplayLuts) are by the HWC.

Summary

Constants

int ONE_DIMENSION

The Lut is one dimensional

int SAMPLING_KEY_CIE_Y

use y of CIE XYZ as the gain value of a lut

int SAMPLING_KEY_MAX_RGB

use max of r,g,b channel as the gain value of a Lut

int SAMPLING_KEY_RGB

use r,g,b channel as the gain value of a Lut

int THREE_DIMENSION

The Lut is three dimensional

Public methods

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

int getDimension()
int[] getSamplingKeys()
int getSize()
int hashCode()

Returns a hash code value for the object.

String toString()

Returns a string representation of the object.

Inherited methods

Constants

ONE_DIMENSION

Added in API level 36
public static final int ONE_DIMENSION

The Lut is one dimensional

Constant Value: 1 (0x00000001)

SAMPLING_KEY_CIE_Y

Added in API level 36
public static final int SAMPLING_KEY_CIE_Y

use y of CIE XYZ as the gain value of a lut

Constant Value: 2 (0x00000002)

SAMPLING_KEY_MAX_RGB

Added in API level 36
public static final int SAMPLING_KEY_MAX_RGB

use max of r,g,b channel as the gain value of a Lut

Constant Value: 1 (0x00000001)

SAMPLING_KEY_RGB

Added in API level 36
public static final int SAMPLING_KEY_RGB

use r,g,b channel as the gain value of a Lut

Constant Value: 0 (0x00000000)

THREE_DIMENSION

Added in API level 36
public static final int THREE_DIMENSION

The Lut is three dimensional

Constant Value: 3 (0x00000003)

Public methods

equals

Added in API level 36
public boolean equals (Object obj)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
obj Object: the reference object with which to compare.

Returns
boolean true if this object is the same as the obj argument; false otherwise.

getDimension

Added in API level 36
public int getDimension ()

Returns
int Value is one of the following:

getSamplingKeys

Added in API level 36
public int[] getSamplingKeys ()

Returns
int[] the list of sampling keys.
This value cannot be null.
Value is one of the following:

getSize

Added in API level 36
public int getSize ()

Returns
int the size of the Lut for each dimension

hashCode

Added in API level 36
public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns
int a hash code value for this object.

toString

Added in API level 36
public String toString ()

Returns a string representation of the object.

Returns
String a string representation of the object.