image_effects::filter::algorithms

Struct GradientMap

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pub struct GradientMap { /* private fields */ }
Expand description

Applies a gradient map to the image.

The gradient map is defined as a slice of tuples containing the colour and its threshold. Each pixel in the image will be mapped to the gradient using its luminance value.

The threshold must be between 0.0 and 1.0 - you can technically use other values but the results may be a bit weird.

As an example, to turn an image grayscale you could pass the colour black at 0.0 and the colour white at 1.0.

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impl GradientMap

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pub fn new() -> Self

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pub fn with_map(map: Vec<(Srgb, f32)>) -> Self

Create a new gradient map from an existing map.

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pub fn add_entry(&mut self, colour: Srgb, luminance: f32) -> &mut Self

Add an entry into the gradient map.

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impl Effect<[u8; 3]> for GradientMap

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fn affect(&self, item: [u8; 3]) -> [u8; 3]

Affects T using self.

Auto Trait Implementations§

Blanket Implementations§

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impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for S
where T: Real + Zero + Arithmetics + Clone, Swp: WhitePoint<T>, Dwp: WhitePoint<T>, D: AdaptFrom<S, Swp, Dwp, T>,

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fn adapt_into_using<M>(self, method: M) -> D
where M: TransformMatrix<T>,

Convert the source color to the destination color using the specified method.
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fn adapt_into(self) -> D

Convert the source color to the destination color using the bradford method by default.
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impl<T, F> Affectable<T, F> for T
where F: Effect<T>,

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fn apply(self, effect: &F) -> T

Applies an effect on self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, C> ArraysFrom<C> for T
where C: IntoArrays<T>,

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fn arrays_from(colors: C) -> T

Cast a collection of colors into a collection of arrays.
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impl<T, C> ArraysInto<C> for T
where C: FromArrays<T>,

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fn arrays_into(self) -> C

Cast this collection of arrays into a collection of colors.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<WpParam, T, U> Cam16IntoUnclamped<WpParam, T> for U
where T: FromCam16Unclamped<WpParam, U>,

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type Scalar = <T as FromCam16Unclamped<WpParam, U>>::Scalar

The number type that’s used in parameters when converting.
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fn cam16_into_unclamped( self, parameters: BakedParameters<WpParam, <U as Cam16IntoUnclamped<WpParam, T>>::Scalar>, ) -> T

Converts self into C, using the provided parameters.
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impl<T, C> ComponentsFrom<C> for T
where C: IntoComponents<T>,

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fn components_from(colors: C) -> T

Cast a collection of colors into a collection of color components.
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impl<F> Effect<[u8; 4]> for F
where F: Effect<[u8; 3]>,

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fn affect(&self, item: [u8; 4]) -> [u8; 4]

Affects T using self.
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impl<F> Effect<DynamicImage> for F
where F: Effect<ImageBuffer<Rgb<u8>, Vec<u8>>> + Effect<ImageBuffer<Rgba<u8>, Vec<u8>>>,

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fn affect(&self, item: DynamicImage) -> DynamicImage

Affects T using self.
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impl<F> Effect<Frame> for F
where F: Effect<ImageBuffer<Rgba<u8>, Vec<u8>>>,

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fn affect(&self, item: Frame) -> Frame

Affects T using self.
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impl<F> Effect<ImageBuffer<Rgb<u8>, Vec<u8>>> for F
where F: Effect<Vec<Vec<[u8; 3]>>>,

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fn affect( &self, item: ImageBuffer<Rgb<u8>, Vec<u8>>, ) -> ImageBuffer<Rgb<u8>, Vec<u8>>

Affects T using self.
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impl<F> Effect<ImageBuffer<Rgba<u8>, Vec<u8>>> for F
where F: Effect<Vec<Vec<[u8; 4]>>>,

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fn affect( &self, item: ImageBuffer<Rgba<u8>, Vec<u8>>, ) -> ImageBuffer<Rgba<u8>, Vec<u8>>

Affects T using self.
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impl<F> Effect<Vec<Vec<[u8; 3]>>> for F
where F: Effect<[u8; 3]>,

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fn affect(&self, item: Vec<Vec<[u8; 3]>>) -> Vec<Vec<[u8; 3]>>

Affects T using self.
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impl<F> Effect<Vec<Vec<[u8; 4]>>> for F
where F: Effect<Vec<Vec<[u8; 3]>>>,

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fn affect(&self, item: Vec<Vec<[u8; 4]>>) -> Vec<Vec<[u8; 4]>>

Affects T using self.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromAngle<T> for T

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fn from_angle(angle: T) -> T

Performs a conversion from angle.
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impl<T, U> FromStimulus<U> for T
where U: IntoStimulus<T>,

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fn from_stimulus(other: U) -> T

Converts other into Self, while performing the appropriate scaling, rounding and clamping.
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> IntoAngle<U> for T
where U: FromAngle<T>,

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fn into_angle(self) -> U

Performs a conversion into T.
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impl<WpParam, T, U> IntoCam16Unclamped<WpParam, T> for U
where T: Cam16FromUnclamped<WpParam, U>,

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type Scalar = <T as Cam16FromUnclamped<WpParam, U>>::Scalar

The number type that’s used in parameters when converting.
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fn into_cam16_unclamped( self, parameters: BakedParameters<WpParam, <U as IntoCam16Unclamped<WpParam, T>>::Scalar>, ) -> T

Converts self into C, using the provided parameters.
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impl<T, U> IntoColor<U> for T
where U: FromColor<T>,

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fn into_color(self) -> U

Convert into T with values clamped to the color defined bounds Read more
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impl<T, U> IntoColorUnclamped<U> for T
where U: FromColorUnclamped<T>,

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fn into_color_unclamped(self) -> U

Convert into T. The resulting color might be invalid in its color space Read more
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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> IntoStimulus<T> for T

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fn into_stimulus(self) -> T

Converts self into T, while performing the appropriate scaling, rounding and clamping.
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T, C> TryComponentsInto<C> for T
where C: TryFromComponents<T>,

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type Error = <C as TryFromComponents<T>>::Error

The error for when try_into_colors fails to cast.
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fn try_components_into(self) -> Result<C, <T as TryComponentsInto<C>>::Error>

Try to cast this collection of color components into a collection of colors. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T, U> TryIntoColor<U> for T
where U: TryFromColor<T>,

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fn try_into_color(self) -> Result<U, OutOfBounds<U>>

Convert into T, returning ok if the color is inside of its defined range, otherwise an OutOfBounds error is returned which contains the unclamped color. Read more
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impl<C, U> UintsFrom<C> for U
where C: IntoUints<U>,

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fn uints_from(colors: C) -> U

Cast a collection of colors into a collection of unsigned integers.
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impl<C, U> UintsInto<C> for U
where C: FromUints<U>,

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fn uints_into(self) -> C

Cast this collection of unsigned integers into a collection of colors.