class: GskComponentTransferCtors

[126:14] static extends: object

Alternate constructors for GskComponentTransfer. Usage: GskComponentTransferCtors.<name>(...). The primary constructor lives directly on GskComponentTransfer.

Methods

newDiscrete (list values)

Creates a new component transfer that applies a step function. The new value is computed as C' = values[k] where k is the smallest value such that k / n <= C < (k + 1) / n
- @p n is Number of values.
- @p values is Values.
- @r A new GskComponentTransfer.
newGamma (double amp, double exp, double ofs)

Creates a new component transfer that applies a gamma transform. The new value is computed as C' = amp * pow (C, exp) + ofs
- @p amp is Amplitude.
- @p exp is Exponent.
- @p ofs is Offset.
- @r A new GskComponentTransfer.
newLevels (double n)

Creates a new component transfer that limits the values of the component to n levels. The new value is computed as C' = (floor (C * n) + 0.5) / n
- @p n is Number of levels.
- @r A new GskComponentTransfer.
newLinear (double m, double b)

Creates a new component transfer that applies a linear transform. The new value is computed as C' = C * m + b
- @p m is Slope.
- @p b is Offset.
- @r A new GskComponentTransfer.
newTable (list values)

Creates a new component transfer that applies a piecewise linear function. The new value is computed as C' = values[k] + (C - k / (n - 1)) * n * (values[k + 1] - values[k]) where k is the smallest value such that k / (n - 1) <= C < (k + 1) / (n - 1)
- @p n is Number of values.
- @p values is Values.
- @r A new GskComponentTransfer.

class: GskComponentTransfer

[15:7] extends: object

Specifies a transfer function for a color component to be applied while rendering. The available functions include linear, piecewise-linear, gamma and step functions. Note that the transfer function is applied to un-premultiplied values, and all results are clamped to the [0, 1] range.

Members

handleObj
lib
retainedCallbacks
signalHandlerNames
signalSetterHandlers

Methods

GskComponentTransfer (Handle = null)

Creates a new component transfer that doesn't change the component value.
- @p Handle is an optional native handle or wrapper whose handle to adopt; when the native constructor is called.
toNativeHandle (Source)

Normalizes a constructor argument into a raw pointer carrier. Accepts a raw NativeHandle, a raw NativeBuffer returned from fn.call(...), another generated wrapper exposing handle(), or null. Returns null when the argument carries no pointer.
- @p Source is the raw handle, raw buffer, wrapper, or null.
- @r A raw pointer carrier or null when no pointer is present.
getLib ()

Returns the opened native library for this generated wrapper.
- @r The opened native library.
handle ()

Returns the wrapped NativeHandle.
- @r The wrapped NativeHandle.
isNull ()

Returns true when the wrapped handle is null.
- @r A bool.
describe ()

Returns a small string for debugging generated wrappers.
- @r A string.
copy ()

Creates a copy of @other.
- @r a newly allocated copy of @other.
free ()

Frees a component transfer.
- @r None.