Struct cogl::Color

pub struct Color(_);

Implementations

impl Color

pub fn new() -> Color

Creates a new (empty) color

Returns

a newly-allocated Color. Use Color::free to free the allocated resources

pub fn get_alpha(&self) -> f32

Retrieves the alpha channel of self as a fixed point value between 0 and 1.0.

Returns

the alpha channel of the passed color

pub fn get_alpha_byte(&self) -> u8

Retrieves the alpha channel of self as a byte value between 0 and 255

Returns

the alpha channel of the passed color

pub fn get_alpha_float(&self) -> f32

Retrieves the alpha channel of self as a floating point value between 0.0 and 1.0

Returns

the alpha channel of the passed color

pub fn get_blue(&self) -> f32

Retrieves the blue channel of self as a fixed point value between 0 and 1.0.

Returns

the blue channel of the passed color

pub fn get_blue_byte(&self) -> u8

Retrieves the blue channel of self as a byte value between 0 and 255

Returns

the blue channel of the passed color

pub fn get_blue_float(&self) -> f32

Retrieves the blue channel of self as a floating point value between 0.0 and 1.0

Returns

the blue channel of the passed color

pub fn get_green(&self) -> f32

Retrieves the green channel of self as a fixed point value between 0 and 1.0.

Returns

the green channel of the passed color

pub fn get_green_byte(&self) -> u8

Retrieves the green channel of self as a byte value between 0 and 255

Returns

the green channel of the passed color

pub fn get_green_float(&self) -> f32

Retrieves the green channel of self as a floating point value between 0.0 and 1.0

Returns

the green channel of the passed color

pub fn get_red(&self) -> f32

Retrieves the red channel of self as a fixed point value between 0 and 1.0.

Returns

the red channel of the passed color

pub fn get_red_byte(&self) -> u8

Retrieves the red channel of self as a byte value between 0 and 255

Returns

the red channel of the passed color

pub fn get_red_float(&self) -> f32

Retrieves the red channel of self as a floating point value between 0.0 and 1.0

Returns

the red channel of the passed color

pub fn init_from_4f(&mut self, red: f32, green: f32, blue: f32, alpha: f32)

Sets the values of the passed channels into a Color

red

value of the red channel, between 0 and 1.0

green

value of the green channel, between 0 and 1.0

blue

value of the blue channel, between 0 and 1.0

alpha

value of the alpha channel, between 0 and 1.0

pub fn init_from_4fv(&mut self, color_array: &[f32])

Sets the values of the passed channels into a Color

color_array

a pointer to an array of 4 float color components

pub fn init_from_4ub(&mut self, red: u8, green: u8, blue: u8, alpha: u8)

Sets the values of the passed channels into a Color.

red

value of the red channel, between 0 and 255

green

value of the green channel, between 0 and 255

blue

value of the blue channel, between 0 and 255

alpha

value of the alpha channel, between 0 and 255

pub fn premultiply(&mut self)

Converts a non-premultiplied color to a pre-multiplied color. For example, semi-transparent red is (1.0, 0, 0, 0.5) when non-premultiplied and (0.5, 0, 0, 0.5) when premultiplied.

pub fn set_alpha(&mut self, alpha: f32)

Sets the alpha channel of self to alpha.

alpha

a float value between 0.0f and 1.0f

pub fn set_alpha_byte(&mut self, alpha: u8)

Sets the alpha channel of self to alpha.

alpha

a byte value between 0 and 255

pub fn set_alpha_float(&mut self, alpha: f32)

Sets the alpha channel of self to alpha.

alpha

a float value between 0.0f and 1.0f

pub fn set_blue(&mut self, blue: f32)

Sets the blue channel of self to blue.

blue

a float value between 0.0f and 1.0f

pub fn set_blue_byte(&mut self, blue: u8)

Sets the blue channel of self to blue.

blue

a byte value between 0 and 255

pub fn set_blue_float(&mut self, blue: f32)

Sets the blue channel of self to blue.

blue

a float value between 0.0f and 1.0f

pub fn set_green(&mut self, green: f32)

Sets the green channel of self to green.

green

a float value between 0.0f and 1.0f

pub fn set_green_byte(&mut self, green: u8)

Sets the green channel of self to green.

green

a byte value between 0 and 255

pub fn set_green_float(&mut self, green: f32)

Sets the green channel of self to green.

green

a float value between 0.0f and 1.0f

pub fn set_red(&mut self, red: f32)

Sets the red channel of self to red.

red

a float value between 0.0f and 1.0f

pub fn set_red_byte(&mut self, red: u8)

Sets the red channel of self to red.

red

a byte value between 0 and 255

pub fn set_red_float(&mut self, red: f32)

Sets the red channel of self to red.

red

a float value between 0.0f and 1.0f

pub fn to_hsl(&self) -> (f32, f32, f32)

Converts self to the HLS format.

The hue value is in the 0 .. 360 range. The luminance and saturation values are in the 0 .. 1 range.

hue

return location for the hue value or None

saturation

return location for the saturation value or None

luminance

return location for the luminance value or None

pub fn unpremultiply(&mut self)

Converts a pre-multiplied color to a non-premultiplied color. For example, semi-transparent red is (0.5, 0, 0, 0.5) when premultiplied and (1.0, 0, 0, 0.5) when non-premultiplied.

pub fn init_from_hsl(hue: f32, saturation: f32, luminance: f32) -> Color

Converts a color expressed in HLS (hue, luminance and saturation) values into a Color.

color

return location for a Color

hue

hue value, in the 0 .. 360 range

saturation

saturation value, in the 0 .. 1 range

luminance

luminance value, in the 0 .. 1 range

Trait Implementations

impl Clone for Color

fn clone(&self) -> Color

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Color

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

Formats the value using the given formatter.

impl Default for Color

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Color

impl Ord for Color

fn cmp(&self, other: &Color) -> Ordering

This method returns an Ordering between self and other.

#[must_use]

pub fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]

pub fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]

pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<Color> for Color

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

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

#[must_use]

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

This method tests for !=.

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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

pub 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 StaticType for Color

fn static_type() -> Type

Returns the type identifier of Self.