1 /* 2 * Copyright (C) 2010 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.replica.replicaisland; 18 19 public class MotionBlurComponent extends GameComponent { 20 private static final int STEP_COUNT = 4; 21 private static final float STEP_DELAY = 0.1f; 22 private static final float OPACITY_STEP = 1.0f / (STEP_COUNT + 1); 23 private BlurRecord[] mHistory; 24 private RenderComponent mBlurTarget; 25 private float mStepDelay; 26 private int mCurrentStep; 27 private float mTimeSinceLastStep; 28 private int mTargetPriority; 29 30 private class BlurRecord { 31 public Vector2 position = new Vector2(); 32 public Texture texture; 33 public int width; 34 public int height; 35 public int[] crop = new int[4]; 36 } 37 public MotionBlurComponent() { 38 super(); 39 mHistory = new BlurRecord[STEP_COUNT]; 40 for (int x = 0; x < STEP_COUNT; x++) { 41 mHistory[x] = new BlurRecord(); 42 } 43 reset(); 44 setPhase(ComponentPhases.PRE_DRAW.ordinal()); 45 } 46 47 @Override 48 public void reset() { 49 for (int x = 0; x < STEP_COUNT; x++) { 50 mHistory[x].texture = null; 51 mHistory[x].position.zero(); 52 } 53 mStepDelay = STEP_DELAY; 54 mBlurTarget = null; 55 mCurrentStep = 0; 56 mTimeSinceLastStep = 0.0f; 57 } 58 59 public void setTarget(RenderComponent target) { 60 mBlurTarget = target; 61 } 62 63 @Override 64 public void update(float timeDelta, BaseObject parent) { 65 if (mBlurTarget != null) { 66 mTimeSinceLastStep += timeDelta; 67 if (mTimeSinceLastStep > mStepDelay) { 68 DrawableBitmap drawable = (DrawableBitmap)mBlurTarget.getDrawable(); 69 if (drawable != null) { 70 Texture currentTexture = drawable.getTexture(); 71 mTargetPriority = mBlurTarget.getPriority(); 72 mHistory[mCurrentStep].texture = currentTexture; 73 mHistory[mCurrentStep].position.set(((GameObject)parent).getPosition()); 74 mHistory[mCurrentStep].width = drawable.getWidth(); 75 mHistory[mCurrentStep].height = drawable.getHeight(); 76 final int[] drawableCrop = drawable.getCrop(); 77 mHistory[mCurrentStep].crop[0] = drawableCrop[0]; 78 mHistory[mCurrentStep].crop[1] = drawableCrop[1]; 79 mHistory[mCurrentStep].crop[2] = drawableCrop[2]; 80 mHistory[mCurrentStep].crop[3] = drawableCrop[3]; 81 mCurrentStep = (mCurrentStep + 1) % STEP_COUNT; 82 mTimeSinceLastStep = 0.0f; 83 } 84 } 85 86 87 RenderSystem renderer = sSystemRegistry.renderSystem; 88 89 90 final int startStep = mCurrentStep > 0 ? mCurrentStep - 1 : STEP_COUNT - 1; 91 // draw each step 92 for (int x = 0; x < STEP_COUNT; x++) { 93 final int step = (startStep - x) < 0 ? (STEP_COUNT + (startStep - x)) : (startStep - x); 94 final BlurRecord record = mHistory[step]; 95 if (record.texture != null) { 96 DrawableBitmap stepImage = sSystemRegistry.drawableFactory.allocateDrawableBitmap(); 97 stepImage.setTexture(record.texture); 98 stepImage.setWidth(record.width); 99 stepImage.setHeight(record.height); 100 stepImage.setCrop(record.crop[0], record.crop[1], record.crop[2], -record.crop[3]); 101 final float opacity = (STEP_COUNT - x) * OPACITY_STEP; 102 stepImage.setOpacity(opacity); 103 104 105 renderer.scheduleForDraw(stepImage, record.position, mTargetPriority - (x + 1), true); 106 } 107 } 108 } 109 } 110 } 111
