1 /* <lambda>null2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.systemui.surfaceeffects.ripple 18 19 import android.content.Context 20 import android.graphics.Canvas 21 import android.graphics.Paint 22 import android.util.AttributeSet 23 import android.util.Log 24 import android.view.View 25 import androidx.annotation.VisibleForTesting 26 27 /** 28 * A view that allows multiple ripples to play. 29 * 30 * Use [MultiRippleController] to play ripple animations. 31 */ 32 class MultiRippleView(context: Context?, attrs: AttributeSet?) : View(context, attrs) { 33 34 @VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE) 35 val ripples = ArrayList<RippleAnimation>() 36 private val ripplePaint = Paint() 37 private var isWarningLogged = false 38 39 companion object { 40 private const val TAG = "MultiRippleView" 41 } 42 43 override fun onDraw(canvas: Canvas?) { 44 if (canvas == null || !canvas.isHardwareAccelerated) { 45 // Drawing with the ripple shader requires hardware acceleration, so skip 46 // if it's unsupported. 47 if (!isWarningLogged) { 48 // Only log once to not spam. 49 Log.w( 50 TAG, 51 "Can't draw ripple shader. $canvas does not support hardware acceleration." 52 ) 53 isWarningLogged = true 54 } 55 return 56 } 57 58 var shouldInvalidate = false 59 60 ripples.forEach { anim -> 61 ripplePaint.shader = anim.rippleShader 62 canvas.drawPaint(ripplePaint) 63 64 shouldInvalidate = shouldInvalidate || anim.isPlaying() 65 } 66 67 if (shouldInvalidate) { 68 invalidate() 69 } 70 } 71 } 72