| /* |
| * 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 |
| data 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() |
| } |
| } |
| |
| /** |
| * 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) |
| ) |
| } |