[−]Struct lcms2::ToneCurveRef
A borrowed reference to a ToneCurve
.
Methods
impl ToneCurveRef
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pub fn reversed(&self) -> ToneCurve
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Creates a tone curve that is the inverse of given tone curve.
pub fn reversed_samples(&self, samples: usize) -> ToneCurve
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Creates a tone curve that is the inverse of given tone curve. In the case it couldn’t be analytically reversed, a tablulated curve of nResultSamples is created.
pub fn join(&self, y: &ToneCurveRef, points: usize) -> ToneCurve
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Composites two tone curves in the form Y^-1(X(t)) (self is X, the argument is Y)
pub fn is_multisegment(&self) -> bool
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Returns TRUE if the tone curve contains more than one segment, FALSE if it has only one segment.
pub fn is_linear(&self) -> bool
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Returns an estimation of cube being an identity (1:1) in the [0..1] domain. Does not take unbounded parts into account. This is just a coarse approximation, with no mathematical validity.
pub fn is_monotonic(&self) -> bool
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Returns an estimation of monotonicity of curve in the [0..1] domain. Does not take unbounded parts into account. This is just a coarse approximation, with no mathematical validity.
pub fn is_descending(&self) -> bool
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Does not take unbounded parts into account.
pub fn parametric_type(&self) -> i32
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pub fn estimated_gamma(&self, precision: f64) -> Option<f64>
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Estimates the apparent gamma of the tone curve by using least squares fitting. Precision: The maximum standard deviation allowed on the residuals, 0.01 is a fair value, set it to a big number to fit any curve, mo matter how good is the fit.
pub fn smooth(&mut self, lambda: f64) -> bool
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Smoothes tone curve according to the lambda parameter. From: Eilers, P.H.C. (1994) Smoothing and interpolation with finite differences. in: Graphic Gems IV, Heckbert, P.S. (ed.), Academic press.
pub fn estimated_entries(&self) -> &[u16]
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Tone curves do maintain a shadow low-resolution tabulated representation of the curve. This function returns a pointer to this table.
pub fn eval<ToneCurveValue: FloatOrU16>(
&self,
v: ToneCurveValue
) -> ToneCurveValue
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&self,
v: ToneCurveValue
) -> ToneCurveValue
Evaluates the given number (u16 or f32) across the given tone curve.
This function is significantly faster for u16, since it uses a pre-computed 16-bit lookup table.
Trait Implementations
impl ToOwned for ToneCurveRef
type Owned = ToneCurve
fn to_owned(&self) -> ToneCurve
fn clone_into(&self, target: &mut Self::Owned)
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🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl AsMut<ToneCurveRef> for ToneCurve
fn as_mut(&mut self) -> &mut ToneCurveRef
impl AsRef<ToneCurveRef> for ToneCurve
fn as_ref(&self) -> &ToneCurveRef
impl Debug for ToneCurveRef
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impl Borrow<ToneCurveRef> for ToneCurve
fn borrow(&self) -> &ToneCurveRef
impl BorrowMut<ToneCurveRef> for ToneCurve
fn borrow_mut(&mut self) -> &mut ToneCurveRef
impl ForeignTypeRef for ToneCurveRef
type CType = ToneCurve
The raw C type.
unsafe fn from_ptr<'a>(ptr: *mut Self::CType) -> &'a Self
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Constructs a shared instance of this type from its raw type.
unsafe fn from_ptr_mut<'a>(ptr: *mut Self::CType) -> &'a mut Self
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Constructs a mutable reference of this type from its raw type.
fn as_ptr(&self) -> *mut Self::CType
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Returns a raw pointer to the wrapped value.
Auto Trait Implementations
impl !Send for ToneCurveRef
impl !Sync for ToneCurveRef
Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T> From for T
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impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,