Enum BlendMode2 

pub enum BlendMode2 {
    Replace,
    PremultipliedAlpha,
    StraightAlpha,
    // some variants omitted
}

The set of possible blending functions to choose from when determining how an image should be composited on top of other images.

Variants

Replace

Indicates that the source pixels replace the destination pixels: source pixel values, including alpha, are written into the output as-is, without blending against the destination. A source pixel with partial or zero alpha is stamped into the output with that alpha intact; it is not treated as opaque. (This describes the blend function itself; a layer’s opacity can demote this mode. See [LayerProperties.blend_mode].)

PremultipliedAlpha

The source pixels are drawn over the destination pixels. The final pixel color that is displayed is calculated as: C_src + (1.0 - alpha_src) * C_dst.

StraightAlpha

The source pixels are drawn over the destination pixels. The final pixel color that is displayed is calculated as: alpha_src * C_src + (1.0 - alpha_src) * C_dst.

Implementations

impl BlendMode2

pub fn from_primitive(prim: u32) -> Option<BlendMode2>

pub fn from_primitive_allow_unknown(prim: u32) -> BlendMode2

pub fn unknown() -> BlendMode2

pub const fn into_primitive(self) -> u32

pub fn is_unknown(&self) -> bool

Trait Implementations

impl Clone for BlendMode2

fn clone(&self) -> BlendMode2

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BlendMode2

impl Debug for BlendMode2

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

Formats the value using the given formatter.

impl<D> Decode<BlendMode2, D> for BlendMode2

where D: ResourceDialect,

fn new_empty() -> BlendMode2

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, D>, offset: usize, _depth: Depth, ) -> Result<(), Error>

Decodes an object of type T from the decoder’s buffers into self.

impl<D> Encode<BlendMode2, D> for BlendMode2

where D: ResourceDialect,

unsafe fn encode( self, encoder: &mut Encoder<'_, D>, offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl Eq for BlendMode2

impl Hash for BlendMode2

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

where __H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for BlendMode2

fn cmp(&self, other: &BlendMode2) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for BlendMode2

fn eq(&self, other: &BlendMode2) -> bool

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for BlendMode2

fn partial_cmp(&self, other: &BlendMode2) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for BlendMode2

impl TypeMarker for BlendMode2

type Owned = BlendMode2

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl ValueTypeMarker for BlendMode2

type Borrowed<'a> = BlendMode2

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &Self::Owned. There are three cases:

fn borrow( value: &<BlendMode2 as TypeMarker>::Owned, ) -> <BlendMode2 as ValueTypeMarker>::Borrowed<'_>

Cheaply converts from &Self::Owned to Self::Borrowed.