commonMain.androidx.compose.ui.graphics.Shadow.kt Maven / Gradle / Ivy
/*
* 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.ui.graphics
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.Stable
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.lerp
import androidx.compose.ui.util.lerp
/**
* A single shadow.
*/
@Immutable
class Shadow(
@Stable
val color: Color = Color(0xFF000000),
@Stable
val offset: Offset = Offset.Zero,
@Stable
val blurRadius: Float = 0.0f
) {
companion object {
/**
* Constant for no shadow.
*/
@Stable
val None = Shadow()
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is Shadow) return false
if (color != other.color) return false
if (offset != other.offset) return false
if (blurRadius != other.blurRadius) return false
return true
}
override fun hashCode(): Int {
var result = color.hashCode()
result = 31 * result + offset.hashCode()
result = 31 * result + blurRadius.hashCode()
return result
}
override fun toString(): String {
return "Shadow(color=$color, offset=$offset, blurRadius=$blurRadius)"
}
fun copy(
color: Color = this.color,
offset: Offset = this.offset,
blurRadius: Float = this.blurRadius
): Shadow {
return Shadow(
color = color,
offset = offset,
blurRadius = blurRadius
)
}
}
/**
* Linearly interpolate two [Shadow]s.
*/
@Stable
fun lerp(start: Shadow, stop: Shadow, fraction: Float): Shadow {
return Shadow(
lerp(start.color, stop.color, fraction),
lerp(start.offset, stop.offset, fraction),
lerp(start.blurRadius, stop.blurRadius, fraction)
)
}