Struct CanvasGradient 

pub struct CanvasGradient {
    pub kind: GradientKind,
    pub stops: Vec<ColorStop>,
}

Canvas 2D のグラデーションオブジェクト。

Fields

kind: GradientKind

stops: Vec<ColorStop>

Implementations

impl CanvasGradient

pub fn new_linear(x0: f32, y0: f32, x1: f32, y1: f32) -> Self

pub fn new_radial(x0: f32, y0: f32, r0: f32, x1: f32, y1: f32, r1: f32) -> Self

pub fn add_color_stop(&mut self, offset: f32, color: u32)

pub fn build_lut(&self) -> [u32; 256]

256段の高速ルックアップテーブル（LUT）を生成する。

pub fn calculate_t(&self, x: f32, y: f32) -> f32

座標 (x, y) における射影パラメータ t (0.0..=1.0) を計算する。

Trait Implementations

impl Clone for CanvasGradient

fn clone(&self) -> CanvasGradient

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CanvasGradient

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

Formats the value using the given formatter.

impl PartialEq for CanvasGradient

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

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

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CanvasGradient