Struct gdk4::RGBA

#[repr(C)]
pub struct RGBA {
    pub red: f32,
    pub green: f32,
    pub blue: f32,
    pub alpha: f32,
}

A RGBA is used to represent a color, in a way that is compatible with cairo’s notion of color.

RGBA is a convenient way to pass colors around. It’s based on cairo’s way to deal with colors and mirrors its behavior. All values are in the range from 0.0 to 1.0 inclusive. So the color (0.0, 0.0, 0.0, 0.0) represents transparent black and (1.0, 1.0, 1.0, 1.0) is opaque white. Other values will be clamped to this range when drawing.

Fields

red: f32

green: f32

blue: f32

alpha: f32

Implementations

impl RGBA

pub fn builder() -> RGBABuilder

Creates a new builder-style object to construct a RGBA.

This method returns an instance of RGBABuilder which can be used to create a RGBA.

pub fn is_opaque(&self) -> bool

Checks if an self value is opaque.

That is, drawing with the value will not retain any results from previous contents.

Returns

true if the self is opaque

pub fn is_clear(&self) -> bool

Checks if an self value is transparent.

That is, drawing with the value would not produce any change.

Returns

true if the self is clear

pub fn black() -> Self

pub fn blue() -> Self

pub fn green() -> Self

pub fn red() -> Self

pub fn white() -> Self

Trait Implementations

impl Clone for RGBA

fn clone(&self) -> RGBA

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RGBA

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

Formats the value using the given formatter.

impl Display for RGBA

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

Formats the value using the given formatter.

impl FromStr for RGBA

type Err = RgbaParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl<'a> FromValue<'a> for RGBA

type Checker = GenericValueTypeOrNoneChecker<Self>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl Hash for RGBA

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl PartialEq<RGBA> for RGBA

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StaticType for RGBA

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for RGBA

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifer of self.

impl ToValueOptional for RGBA

fn to_value_optional(s: Option<&Self>) -> Value

Convert an Option to a Value.

impl ValueType for RGBA

type Type = Self

Type to get the Type from.

impl Copy for RGBA

impl Eq for RGBA