# ColorSpace.Rgb.TransferParameters

 public static class ColorSpace.Rgb.TransferParameters 
 extends Object   

 java.lang.Object ↳ android.graphics.ColorSpace.Rgb.TransferParameters

Defines the parameters for the ICC parametric curve type 4, as defined in ICC.1:2004-10, section 10.15.

The EOTF is of the form:

$$$$Y = \begin{cases}c X + f & X \lt d \\ * \left( a X + b \right) ^{g} + e & X \ge d \end{cases}$$$$

The corresponding OETF is simply the inverse function.

The parameters defined by this class form a valid transfer function only if all the following conditions are met:

• No parameter is a Not-a-Number
• $$d$$ is in the range $$[0..1]$$
• The function is not constant
• The function is positive and increasing

## Summary

### Fields

 public final double a

Variable $$a$$ in the equation of the EOTF described above.

 public final double b

Variable $$b$$ in the equation of the EOTF described above.

 public final double c

Variable $$c$$ in the equation of the EOTF described above.

 public final double d

Variable $$d$$ in the equation of the EOTF described above.

 public final double e

Variable $$e$$ in the equation of the EOTF described above.

 public final double f

Variable $$f$$ in the equation of the EOTF described above.

 public final double g

Variable $$g$$ in the equation of the EOTF described above.

### Public constructors

 ColorSpace.Rgb.TransferParameters(double a, double b, double c, double d, double g) 

Defines the parameters for the ICC parametric curve type 3, as defined in ICC.1:2004-10, section 10.15.

 ColorSpace.Rgb.TransferParameters(double a, double b, double c, double d, double e, double f, double g) 

Defines the parameters for the ICC parametric curve type 4, as defined in ICC.1:2004-10, section 10.15.

### Public methods

 boolean  equals(Object o) 

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

 int  hashCode() 

Returns a hash code value for the object.

## Fields

### a

public final double a

Variable $$a$$ in the equation of the EOTF described above.

### b

public final double b

Variable $$b$$ in the equation of the EOTF described above.

### c

public final double c

Variable $$c$$ in the equation of the EOTF described above.

### d

public final double d

Variable $$d$$ in the equation of the EOTF described above.

### e

public final double e

Variable $$e$$ in the equation of the EOTF described above.

### f

public final double f

Variable $$f$$ in the equation of the EOTF described above.

### g

public final double g

Variable $$g$$ in the equation of the EOTF described above.

## Public constructors

### ColorSpace.Rgb.TransferParameters

public ColorSpace.Rgb.TransferParameters (double a,
double b,
double c,
double d,
double g)

Defines the parameters for the ICC parametric curve type 3, as defined in ICC.1:2004-10, section 10.15.

The EOTF is of the form:

$$$$Y = \begin{cases}c X & X \lt d \\ * \left( a X + b \right) ^{g} & X \ge d \end{cases}$$$$

This constructor is equivalent to setting $$e$$ and $$f$$ to 0.

Parameters
a double: The value of $$a$$ in the equation of the EOTF described above

b double: The value of $$b$$ in the equation of the EOTF described above

c double: The value of $$c$$ in the equation of the EOTF described above

d double: The value of $$d$$ in the equation of the EOTF described above

g double: The value of $$g$$ in the equation of the EOTF described above

Throws
IllegalArgumentException If the parameters form an invalid transfer function

### ColorSpace.Rgb.TransferParameters

public ColorSpace.Rgb.TransferParameters (double a,
double b,
double c,
double d,
double e,
double f,
double g)

Defines the parameters for the ICC parametric curve type 4, as defined in ICC.1:2004-10, section 10.15.

Parameters
a double: The value of $$a$$ in the equation of the EOTF described above

b double: The value of $$b$$ in the equation of the EOTF described above

c double: The value of $$c$$ in the equation of the EOTF described above

d double: The value of $$d$$ in the equation of the EOTF described above

e double: The value of $$e$$ in the equation of the EOTF described above

f double: The value of $$f$$ in the equation of the EOTF described above

g double: The value of $$g$$ in the equation of the EOTF described above

Throws
IllegalArgumentException If the parameters form an invalid transfer function

## Public methods

### equals

public boolean equals (Object o)

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.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

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

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

### hashCode

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(Object) 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(java.lang.Object) 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.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
int a hash code value for this object.