Struct lcms2::ToneCurveRef
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pub struct ToneCurveRef(_);
Tone curves are powerful constructs that can contain curves specified in diverse ways.
The curve is stored in segments, where each segment can be sampled or specified by parameters. A 16.bit simplification of the whole curve is kept for optimization purposes. For float operation, each segment is evaluated separately. Plug-ins may be used to define new parametric schemes.
Methods
impl ToneCurveRef[src]
pub fn reversed(&self) -> ToneCurve[src]
Creates a tone curve that is the inverse of given tone curve.
pub fn reversed_samples(&self, samples: usize) -> ToneCurve[src]
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[src]
Composites two tone curves in the form Y-1(X(t)) (self is X, the argument is Y)
pub fn is_multisegment(&self) -> bool[src]
Returns TRUE if the tone curve contains more than one segment, FALSE if it has only one segment.
pub fn is_linear(&self) -> bool[src]
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[src]
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[src]
Does not take unbounded parts into account.
pub fn parametric_type(&self) -> i32[src]
pub fn estimated_gamma(&self, precision: f64) -> Option<f64>[src]
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[src]
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][src]
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[src]
&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
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut Self::Owned)[src]
🔬 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 Borrow<ToneCurveRef> for ToneCurve
fn borrow(&self) -> &ToneCurveRef
Immutably borrows from an owned value. Read more
impl AsRef<ToneCurveRef> for ToneCurve
fn as_ref(&self) -> &ToneCurveRef
Performs the conversion.
impl ForeignTypeRef for ToneCurveRef
type CType = ToneCurve
The raw C type.
ⓘImportant traits for &'a mut Iunsafe fn from_ptr<'a>(ptr: *mut Self::CType) -> &'a Self[src]
Constructs a shared instance of this type from its raw type.
ⓘImportant traits for &'a mut Iunsafe fn from_ptr_mut<'a>(ptr: *mut Self::CType) -> &'a mut Self[src]
Constructs a mutable reference of this type from its raw type.
fn as_ptr(&self) -> *mut Self::CType[src]
Returns a raw pointer to the wrapped value.