程序包 ohos.media.image.common

枚举 AlphaType

java.lang.Object

java.lang.Enum<AlphaType>

ohos.media.image.common.AlphaType

所有已实现的接口:

Serializable, Comparable<AlphaType>

public enum AlphaType
extends Enum<AlphaType>

Represents the alpha type of an image.

从以下版本开始:

3

SystemCapability

SystemCapability.Multimedia#IMAGE

枚举常量概要

枚举常量

枚举常量	说明
OPAQUE	Indicates that the image format does not include the alpha channel, or the alpha type of all pixels is opaque.
PREMUL	Indicates that the color channel of each pixel is premultiplied by the alpha channel value.
UNKNOWN	Indicates an unknown alpha type.
UNPREMUL	Indicates that the color component of each pixel is independent from the alpha channel and is not premultiplied by the value.

方法概要

限定符和类型	方法	说明
int	getValue()	Obtains the enum value of the alpha type.
static 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 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 (AlphaType c : 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

public static final AlphaType UNKNOWN

Indicates an unknown alpha type.

OPAQUE

public static final AlphaType OPAQUE

Indicates that the image format does not include the alpha channel, or the alpha type of all pixels is opaque.

PREMUL

public static final AlphaType PREMUL

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

UNPREMUL

public static final AlphaType UNPREMUL

Indicates that the color component of each pixel is independent from the alpha channel and is not premultiplied by the value.

方法详细资料

values

public static 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 (AlphaType c : 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 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

getValue

public int getValue()

Obtains the enum value of the alpha type.

返回:

Returns the integer enum value.

从以下版本开始:

3