ColorVectorConverter.kt
/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.compose.animation
import androidx.compose.animation.core.AnimationVector4D
import androidx.compose.animation.core.TwoWayConverter
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.colorspace.ColorSpace
import androidx.compose.ui.graphics.colorspace.ColorSpaces
/**
* A lambda that takes a [ColorSpace] and returns a converter that can both convert a [Color] to
* a [AnimationVector4D], and convert a [AnimationVector4D]) back to a [Color] in the given
* [ColorSpace].
*/
private val ColorToVector: (colorSpace: ColorSpace) -> TwoWayConverter<Color, AnimationVector4D> =
{ colorSpace ->
TwoWayConverter(
convertToVector = {
val linearColor = it.convert(ColorSpaces.LinearExtendedSrgb)
AnimationVector4D(
linearColor.alpha, linearColor.red, linearColor.green,
linearColor.blue
)
},
convertFromVector = {
Color(
alpha = it.v1.coerceIn(0.0f, 1.0f),
red = it.v2.coerceIn(0.0f, 1.0f),
green = it.v3.coerceIn(0.0f, 1.0f),
blue = it.v4.coerceIn(0.0f, 1.0f),
colorSpace = ColorSpaces.LinearExtendedSrgb
).convert(colorSpace)
}
)
}
/**
* A lambda that takes a [ColorSpace] and returns a converter that can both convert a [Color] to
* a [AnimationVector4D], and convert a [AnimationVector4D]) back to a [Color] in the given
* [ColorSpace].
*/
val Color.Companion.VectorConverter:
(colorSpace: ColorSpace) -> TwoWayConverter<Color, AnimationVector4D>
get() = ColorToVector