Struct Mask 

pub struct Mask {
    pub width: u32,
    pub height: u32,
    pub bits: Vec<u8>,
}

width × height pixels, a bit each: rows top to bottom, a row’s pixels from its first byte’s highest bit on, each row whole bytes.

Fields

width: u32

height: u32

bits: Vec<u8>

Implementations

impl Mask

pub fn row_bytes(width: u32) -> usize

The bytes a row takes.

pub fn get(&self, x: u32, y: u32) -> bool

Whether pixel (x, y) is set.

pub fn of(image: &Image) -> Option<(Mask, Color)>

image as a mask and its one color, when it is one: every pixel clear or opaque, all opaque ones one color (else its colors and edges keep it an image).

pub fn image(&self, color: Color) -> Image

As an image: set pixels color, the rest clear.

Trait Implementations

impl Clone for Mask

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Mask

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

Formats the value using the given formatter.

impl Default for Mask

fn default() -> Self

Returns the “default value” for a type.

impl Fields for Mask

const FIELDS: &'static [(&'static str, &'static str)]

impl PartialEq for Mask

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

Equality operator ==.

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

Inequality operator !=.

impl Schema for Mask

fn encode(&self, __yog_w: &mut Writer)

Writes itself in the binary form, straight — Schema::write’s value encoded, unless the type knows better (derived ones do).

fn decode(__yog_d: &mut Decoder<'_>) -> Option<Self>

Reads itself from the binary form, straight; None when it isn’t what Schema::encode writes — then read_bytes reads the slow way, which says what’s wrong. Through a value unless the type knows better (derived ones do).

fn pack(&self, __yog_p: &mut Packer)

Packs itself into a frame (crate::frame): its binary form as bytes, unless the type packs itself (derived ones and plain types do).

fn unpack(__yog_u: &mut Unpacker<'_>) -> Option<Self>

Reads itself out of a frame; None if the bytes aren’t what Schema::pack writes.

fn shape() -> Shape

What the format looks like.

fn read(v: &ValueRef<'_>, cx: &mut Reader<'_>) -> Option<Self>

Reads v. Problems go to cx at its current path; None when the value couldn’t be read (the problem is in cx).

fn write(&self) -> Value

The value, as the format writes it.

fn absent() -> Option<Self>

The value of a field that isn’t there — None: the field is required.

fn skip(&self) -> bool

Whether a struct leaves this field out when writing it.

fn pack_list(items: &[Self], p: &mut Packer)

A list of these packed: a count, then each one (floats raw).

fn unpack_list(u: &mut Unpacker<'_>) -> Option<Vec<Self>>

A list of these out of a frame.

fn encode_list(items: &[Self], w: &mut Writer)

A list of these written straight (numbers pack theirs).

fn decode_list(d: &mut Decoder<'_>) -> Option<Vec<Self>>

A list of these read straight.

impl StructuralPartialEq for Mask