Struct slint::Color

#[repr(C)]
pub struct Color { /* private fields */ }

Color represents a color in the Slint run-time, represented using 8-bit channels for red, green, blue and the alpha (opacity). It can be conveniently converted using the to_ and from_ (a)rgb helper functions:

let col = some_color.to_argb_f32();
do_something_with_red_and_green(col.red, col.green);

let RgbaColor { red, blue, green, .. } = some_color.to_argb_u8();
do_something_with_red(red);

let new_col = Color::from(RgbaColor{ red: 0.5, green: 0.65, blue: 0.32, alpha: 1.});

Implementations

impl Color

pub const fn from_argb_encoded(encoded: u32) -> Color

Construct a color from an integer encoded as 0xAARRGGBB

pub fn as_argb_encoded(&self) -> u32

Returns (alpha, red, green, blue) encoded as u32

pub const fn from_argb_u8(alpha: u8, red: u8, green: u8, blue: u8) -> Color

Construct a color from the alpha, red, green and blue color channel parameters.

pub const fn from_rgb_u8(red: u8, green: u8, blue: u8) -> Color

Construct a color from the red, green and blue color channel parameters. The alpha channel will have the value 255.

pub fn from_argb_f32(alpha: f32, red: f32, green: f32, blue: f32) -> Color

Construct a color from the alpha, red, green and blue color channel parameters.

pub fn from_rgb_f32(red: f32, green: f32, blue: f32) -> Color

Construct a color from the red, green and blue color channel parameters. The alpha channel will have the value 255.

pub fn to_argb_u8(&self) -> RgbaColor<u8>

Converts this color to an RgbaColor struct for easy destructuring.

pub fn to_argb_f32(&self) -> RgbaColor<f32>

Converts this color to an RgbaColor struct for easy destructuring.

pub fn red(self) -> u8

Returns the red channel of the color as u8 in the range 0..255.

pub fn green(self) -> u8

Returns the green channel of the color as u8 in the range 0..255.

pub fn blue(self) -> u8

Returns the blue channel of the color as u8 in the range 0..255.

pub fn alpha(self) -> u8

Returns the alpha channel of the color as u8 in the range 0..255.

pub fn brighter(&self, factor: f32) -> Color

Returns a new version of this color that has the brightness increased by the specified factor. This is done by converting the color to the HSV color space and multiplying the brightness (value) with (1 + factor). The result is converted back to RGB and the alpha channel is unchanged. So for example brighter(0.2) will increase the brightness by 20%, and calling brighter(-0.5) will return a color that’s 50% darker.

pub fn darker(&self, factor: f32) -> Color

Returns a new version of this color that has the brightness decreased by the specified factor. This is done by converting the color to the HSV color space and dividing the brightness (value) by (1 + factor). The result is converted back to RGB and the alpha channel is unchanged. So for example darker(0.3) will decrease the brightness by 30%.

pub fn transparentize(&self, factor: f32) -> Color

Returns a new version of this color with the opacity decreased by factor.

The transparency is obtained by multiplying the alpha channel by (1 - factor).

Examples

Decreasing the opacity of a red color by half:

let red = Color::from_argb_u8(255, 255, 0, 0);
assert_eq!(red.transparentize(0.5), Color::from_argb_u8(128, 255, 0, 0));

Decreasing the opacity of a blue color by 20%:

let blue = Color::from_argb_u8(200, 0, 0, 255);
assert_eq!(blue.transparentize(0.2), Color::from_argb_u8(160, 0, 0, 255));

Negative values increase the opacity

let blue = Color::from_argb_u8(200, 0, 0, 255);
assert_eq!(blue.transparentize(-0.1), Color::from_argb_u8(220, 0, 0, 255));

pub fn mix(&self, other: &Color, factor: f32) -> Color

Returns a new color that is a mix of self and other, with a proportion factor given by factor (which will be clamped to be between 0.0 and 1.0).

Examples

Mix red with black half-and-half:

let red = Color::from_rgb_u8(255, 0, 0);
let black = Color::from_rgb_u8(0, 0, 0);
assert_eq!(red.mix(&black, 0.5), Color::from_rgb_u8(128, 0, 0));

Mix Purple with OrangeRed with 75%:25% ratio:

let purple = Color::from_rgb_u8(128, 0, 128);
let orange_red = Color::from_rgb_u8(255, 69, 0);
assert_eq!(purple.mix(&orange_red, 0.75), Color::from_rgb_u8(160, 17, 96));

pub fn with_alpha(&self, alpha: f32) -> Color

Returns a new version of this color with the opacity set to alpha.

Trait Implementations

impl Clone for Color

fn clone(&self) -> Color

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Color

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

Formats the value using the given formatter.

impl Default for Color

fn default() -> Color

Returns the “default value” for a type.

impl Display for Color

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

Formats the value using the given formatter.

impl From<Color> for Brush

fn from(original: Color) -> Brush

Converts to this type from the input type.

impl From<Color> for PremultipliedRgbaColor

Convert a non-premultiplied color to a premultiplied one

fn from(col: Color) -> PremultipliedRgbaColor

Converts to this type from the input type.

impl From<Color> for RgbaColor<f32>

fn from(col: Color) -> RgbaColor<f32>

Converts to this type from the input type.

impl From<Color> for RgbaColor<u8>

fn from(col: Color) -> RgbaColor<u8>

Converts to this type from the input type.

impl From<RgbaColor<f32>> for Color

fn from(col: RgbaColor<f32>) -> Color

Converts to this type from the input type.

impl From<RgbaColor<u8>> for Color

fn from(col: RgbaColor<u8>) -> Color

Converts to this type from the input type.

impl InterpolatedPropertyValue for Color

fn interpolate(&self, target_value: &Color, t: f32) -> Color

Returns the interpolated value between self and target_value according to the progress parameter t that’s usually between 0 and 1. With certain animation easing curves it may over- or undershoot though.

impl PartialEq<Color> for Color

fn eq(&self, other: &Color) -> 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 !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<Color> for Color

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Copy for Color

impl StructuralPartialEq for Color