1 /* 2 * Copyright (C) 2024 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 package com.android.internal.widget.remotecompose.core.operations.layout.animation; 17 18 import android.annotation.NonNull; 19 20 import com.android.internal.widget.remotecompose.core.PaintContext; 21 import com.android.internal.widget.remotecompose.core.operations.layout.Component; 22 import com.android.internal.widget.remotecompose.core.operations.layout.measure.ComponentMeasure; 23 import com.android.internal.widget.remotecompose.core.operations.paint.PaintBundle; 24 25 import java.util.ArrayList; 26 import java.util.HashMap; 27 28 public class ParticleAnimation { 29 @NonNull HashMap<Integer, ArrayList<Particle>> mAllParticles = new HashMap<>(); 30 31 @NonNull PaintBundle mPaint = new PaintBundle(); 32 33 /** 34 * Animate the particle animation 35 * 36 * @param context the current paint context 37 * @param component the target component 38 * @param start the component's measure at the end of the animation 39 * @param end the component's measure at the end of the animation 40 * @param progress the current animation progress 41 */ animate( @onNull PaintContext context, @NonNull Component component, @NonNull ComponentMeasure start, @NonNull ComponentMeasure end, float progress)42 public void animate( 43 @NonNull PaintContext context, 44 @NonNull Component component, 45 @NonNull ComponentMeasure start, 46 @NonNull ComponentMeasure end, 47 float progress) { 48 ArrayList<Particle> particles = mAllParticles.get(component.getComponentId()); 49 if (particles == null) { 50 particles = new ArrayList<Particle>(); 51 for (int i = 0; i < 20; i++) { 52 float x = (float) Math.random(); 53 float y = (float) Math.random(); 54 float radius = (float) Math.random(); 55 float r = 220f; 56 float g = 220f; 57 float b = 220f; 58 particles.add(new Particle(x, y, radius, r, g, b)); 59 } 60 mAllParticles.put(component.getComponentId(), particles); 61 } 62 context.save(); 63 context.savePaint(); 64 for (int i = 0; i < particles.size(); i++) { 65 Particle particle = particles.get(i); 66 mPaint.reset(); 67 mPaint.setColor( 68 particle.r / 255f, 69 particle.g / 255f, 70 particle.b / 255f, 71 (200 * (1 - progress)) / 255f); 72 context.applyPaint(mPaint); 73 float dx = start.getX() + component.getWidth() * particle.x; 74 float dy = 75 start.getY() 76 + component.getHeight() * particle.y 77 + progress * 0.01f * component.getHeight(); 78 float dr = (component.getHeight() + 60) * 0.15f * particle.radius + (30 * progress); 79 context.drawCircle(dx, dy, dr); 80 } 81 context.restorePaint(); 82 context.restore(); 83 } 84 } 85