Enum tiny_skia::Shader

pub enum Shader<'a> {
    SolidColor(Color),
    LinearGradient(LinearGradient),
    RadialGradient(RadialGradient),
    Pattern(Pattern<'a>),
}

A shader specifies the source color(s) for what is being drawn.

If a paint has no shader, then the paint’s color is used. If the paint has a shader, then the shader’s color(s) are use instead, but they are modulated by the paint’s alpha. This makes it easy to create a shader once (e.g. bitmap tiling or gradient) and then change its transparency without having to modify the original shader. Only the paint’s alpha needs to be modified.

Variants

SolidColor(Color)

Tuple Fields

0: Color

A solid color shader.

LinearGradient(LinearGradient)

Tuple Fields

0: LinearGradient

A linear gradient shader.

RadialGradient(RadialGradient)

Tuple Fields

0: RadialGradient

A radial gradient shader.

Pattern(Pattern<'a>)

Tuple Fields

0: Pattern<'a>

A pattern shader.

Implementations

impl<'a> Shader<'a>

pub fn is_opaque(&self) -> bool

Checks if the shader is guaranteed to produce only opaque colors.

pub fn transform(&mut self, ts: Transform)

Transforms the shader.

pub fn apply_opacity(&mut self, opacity: f32)

Shifts shader’s opacity.

opacity will be clamped to the 0..=1 range.

This is roughly the same as Skia’s SkPaint::setAlpha.

Unlike Skia, we do not support global alpha/opacity, which is in Skia is set via the alpha channel of the SkPaint::fColor4f. Instead, you can shift the opacity of the shader to whatever value you need.

• For SolidColor this function will multiply color.alpha by opacity.
• For gradients this function will multiply all colors by opacity.
• For Pattern this function will multiply Patter::opacity by opacity.

Trait Implementations

impl<'a> Clone for Shader<'a>

fn clone(&self) -> Shader<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Shader<'a>

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

Formats the value using the given formatter.