Connector

Kotlin |Java

open class Connector

kotlin.Any
↳	android.graphics.ColorSpace.Connector

A connector transforms colors from a source color space to a destination color space.

A source color space is connected to a destination color space using the color transform $C$ computed from their respective transforms noted $T_{src}$ and $T_{dst}$ in the following equation:

$$C = T^{-1}_{dst} . T_{src}$$

The transform $C$ shown above is only valid when the source and destination color spaces have the same profile connection space (PCS). We know that instances of ColorSpace always use CIE XYZ as their PCS but their white points might differ. When they do, we must perform a chromatic adaptation of the color spaces' transforms. To do so, we use the von Kries method described in the documentation of Adaptation, using the CIE standard illuminant D50 as the target white point.

Example of conversion from sRGB to DCI-P3:

ColorSpace.Connector connector = ColorSpace.connect(
          ColorSpace.get(ColorSpace.Named.SRGB),
          ColorSpace.get(ColorSpace.Named.DCI_P3));
  float[] p3 = connector.transform(1.0f, 0.0f, 0.0f);
  // p3 contains { 0.9473, 0.2740, 0.2076 }

Summary

Public methods
open ColorSpace	`getDestination()` Returns the destination color space this connector will convert to.
open ColorSpace.RenderIntent!	`getRenderIntent()` Returns the render intent this connector will use when mapping the source color space to the destination color space.
open ColorSpace	`getSource()` Returns the source color space this connector will convert from.
open FloatArray	`transform(r: Float, g: Float, b: Float)` Transforms the specified color from the source color space to a color in the destination color space.
open FloatArray	`transform(v: FloatArray)` Transforms the specified color from the source color space to a color in the destination color space.

Public methods

getDestination

Added in API level 26

open fun getDestination(): ColorSpace

Returns the destination color space this connector will convert to.

Return
`ColorSpace`	A non-null instance of `ColorSpace`

See Also

#getSource()

getRenderIntent

Added in API level 26

open fun getRenderIntent(): ColorSpace.RenderIntent!

Returns the render intent this connector will use when mapping the source color space to the destination color space.

Return
`ColorSpace.RenderIntent!`	A non-null `RenderIntent`

See Also

android.graphics.ColorSpace.RenderIntent

getSource

Added in API level 26

open fun getSource(): ColorSpace

Returns the source color space this connector will convert from.

Return
`ColorSpace`	A non-null instance of `ColorSpace`

See Also

#getDestination()

transform

Added in API level 26

open fun transform(
    r: Float, 
    g: Float, 
    b: Float
): FloatArray

Transforms the specified color from the source color space to a color in the destination color space. This convenience method assumes a source color model with 3 components (typically RGB). To transform from color models with more than 3 components, such as CMYK, use transform(float[]) instead.

Parameters
`r`	Float: The red component of the color to transform
`g`	Float: The green component of the color to transform
`b`	Float: The blue component of the color to transform

Return
`FloatArray`	A new array of 3 floats containing the specified color transformed from the source space to the destination space This value cannot be `null`.

See Also

#transform(float[])

transform

Added in API level 26

open fun transform(v: FloatArray): FloatArray

Transforms the specified color from the source color space to a color in the destination color space.

Parameters
`v`	FloatArray: A non-null array of 3 floats containing the value to transform and that will hold the result of the transform

Return
`FloatArray`	The v array passed as a parameter, containing the specified color transformed from the source space to the destination space This value cannot be `null`.

See Also

#transform(float, float, float)