枚举 AVAlphaMode 

#[repr(i32)]
pub enum AVAlphaMode {
    AVALPHA_MODE_UNSPECIFIED = 0,
    AVALPHA_MODE_PREMULTIPLIED = 1,
    AVALPHA_MODE_STRAIGHT = 2,
    AVALPHA_MODE_NB = 3,
}

Correlation between the alpha channel and color values.

Variants

AVALPHA_MODE_UNSPECIFIED = 0

< Unknown alpha handling, or no alpha channel

AVALPHA_MODE_PREMULTIPLIED = 1

< Alpha channel is multiplied into color values

AVALPHA_MODE_STRAIGHT = 2

< Alpha channel is independent of color values

AVALPHA_MODE_NB = 3

< Not part of ABI

trait 实现

impl Clone for AVAlphaMode

fn clone(&self) -> AVAlphaMode

Returns a duplicate of the value. 阅读更多

fn clone_from(&mut self, source: &Self)

从 source 执行拷贝赋值。 阅读更多

impl Debug for AVAlphaMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

使用给定的格式化器格式化该值。 阅读更多

impl Hash for AVAlphaMode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. 阅读更多

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. 阅读更多

impl PartialEq for AVAlphaMode

fn eq(&self, other: &AVAlphaMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

测试 !=。默认实现几乎总是足够的，没有充分理由不应被重写。

impl Copy for AVAlphaMode

impl Eq for AVAlphaMode

impl StructuralPartialEq for AVAlphaMode