程序包 ohos.agp.render

枚举 Texture.AlphaType

java.lang.Object

java.lang.Enum<Texture.AlphaType>

ohos.agp.render.Texture.AlphaType

所有已实现的接口:

Serializable, Comparable<Texture.AlphaType>

封闭类:

Texture

public static enum Texture.AlphaType
extends Enum<Texture.AlphaType>

Enumerates alpha types of the texture.

A pixel has multiple levels of transparency. In a simple alpha blending, alpha weighting is performed on the drawing color and the target color to obtain a new color. For example, if the alpha value is a number from 0 to 1, the formula for calculating the value of the new color is as follows: New color = Drawing color x Alpha value + Target color x (1 - Alpha value).

从以下版本开始:

3

枚举常量概要

枚举常量

枚举常量	说明
OPAQUE_ALPHATYPE	Indicates that the pixel is opaque.
PREMUL_ALPHATYPE	Indicates that the component of each pixel is premultiplied by the alpha value.
UNKNOWN_ALPHATYPE	Indicates that the alpha type is uninitialized.
UNPREMUL_ALPHATYPE	Indicates that the pixel is irrelevant to the alpha value.

方法概要

限定符和类型	方法	说明
int	value()	Obtains the enumeration identifier of the alpha type in this Texture.
static Texture.AlphaType	valueOf(String name)	返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)
static Texture.AlphaType[]	values()	按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示: for (Texture.AlphaType c : Texture.AlphaType.values()) System.out.println(c);

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

UNKNOWN_ALPHATYPE

public static final Texture.AlphaType UNKNOWN_ALPHATYPE

Indicates that the alpha type is uninitialized.

从以下版本开始:

4

OPAQUE_ALPHATYPE

public static final Texture.AlphaType OPAQUE_ALPHATYPE

Indicates that the pixel is opaque.

从以下版本开始:

4

PREMUL_ALPHATYPE

public static final Texture.AlphaType PREMUL_ALPHATYPE

Indicates that the component of each pixel is premultiplied by the alpha value.

从以下版本开始:

4

UNPREMUL_ALPHATYPE

public static final Texture.AlphaType UNPREMUL_ALPHATYPE

Indicates that the pixel is irrelevant to the alpha value.

从以下版本开始:

4

方法详细资料

values

public static Texture.AlphaType[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (Texture.AlphaType c : Texture.AlphaType.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static Texture.AlphaType valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

value

public int value()

Obtains the enumeration identifier of the alpha type in this Texture.

返回:

Returns the enumeration identifier of the alpha type in this Texture.