1 /* 2 * Copyright (C) 2012 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.camera; 18 19 import android.graphics.Color; 20 import android.os.SystemClock; 21 import android.view.animation.DecelerateInterpolator; 22 import android.view.animation.Interpolator; 23 24 import com.android.gallery3d.glrenderer.GLCanvas; 25 import com.android.gallery3d.glrenderer.RawTexture; 26 27 /** 28 * Class to handle the capture animation. 29 */ 30 public class CaptureAnimManager { 31 @SuppressWarnings("unused") 32 private static final String TAG = "CAM_Capture"; 33 private static final int TIME_FLASH = 200; 34 private static final int TIME_HOLD = 400; 35 private static final int TIME_SLIDE = 400; // milliseconds. 36 37 private static final int ANIM_BOTH = 0; 38 private static final int ANIM_FLASH = 1; 39 private static final int ANIM_SLIDE = 2; 40 41 private final Interpolator mSlideInterpolator = new DecelerateInterpolator(); 42 43 private int mAnimOrientation; // Could be 0, 90, 180 or 270 degrees. 44 private long mAnimStartTime; // milliseconds. 45 private float mX; // The center of the whole view including preview and review. 46 private float mY; 47 private float mDelta; 48 private int mDrawWidth; 49 private int mDrawHeight; 50 private int mAnimType; 51 52 /* preview: camera preview view. 53 * review: view of picture just taken. 54 */ CaptureAnimManager()55 public CaptureAnimManager() { 56 } 57 setOrientation(int displayRotation)58 public void setOrientation(int displayRotation) { 59 mAnimOrientation = (360 - displayRotation) % 360; 60 } 61 animateSlide()62 public void animateSlide() { 63 if (mAnimType != ANIM_FLASH) { 64 return; 65 } 66 mAnimType = ANIM_SLIDE; 67 mAnimStartTime = SystemClock.uptimeMillis(); 68 } 69 animateFlash()70 public void animateFlash() { 71 mAnimType = ANIM_FLASH; 72 } 73 animateFlashAndSlide()74 public void animateFlashAndSlide() { 75 mAnimType = ANIM_BOTH; 76 } 77 78 // x, y, w and h: the rectangle area where the animation takes place. startAnimation(int x, int y, int w, int h)79 public void startAnimation(int x, int y, int w, int h) { 80 mAnimStartTime = SystemClock.uptimeMillis(); 81 // Set the views to the initial positions. 82 mDrawWidth = w; 83 mDrawHeight = h; 84 mX = x; 85 mY = y; 86 switch (mAnimOrientation) { 87 case 0: // Preview is on the left. 88 mDelta = w; 89 break; 90 case 90: // Preview is below. 91 mDelta = -h; 92 break; 93 case 180: // Preview on the right. 94 mDelta = -w; 95 break; 96 case 270: // Preview is above. 97 mDelta = h; 98 break; 99 } 100 } 101 102 // Returns true if the animation has been drawn. drawAnimation(GLCanvas canvas, CameraScreenNail preview, RawTexture review)103 public boolean drawAnimation(GLCanvas canvas, CameraScreenNail preview, 104 RawTexture review) { 105 long timeDiff = SystemClock.uptimeMillis() - mAnimStartTime; 106 // Check if the animation is over 107 if (mAnimType == ANIM_SLIDE && timeDiff > TIME_SLIDE) return false; 108 if (mAnimType == ANIM_BOTH && timeDiff > TIME_HOLD + TIME_SLIDE) return false; 109 110 int animStep = mAnimType; 111 if (mAnimType == ANIM_BOTH) { 112 animStep = (timeDiff < TIME_HOLD) ? ANIM_FLASH : ANIM_SLIDE; 113 if (animStep == ANIM_SLIDE) { 114 timeDiff -= TIME_HOLD; 115 } 116 } 117 118 if (animStep == ANIM_FLASH) { 119 review.draw(canvas, (int) mX, (int) mY, mDrawWidth, mDrawHeight); 120 if (timeDiff < TIME_FLASH) { 121 float f = 0.3f - 0.3f * timeDiff / TIME_FLASH; 122 int color = Color.argb((int) (255 * f), 255, 255, 255); 123 canvas.fillRect(mX, mY, mDrawWidth, mDrawHeight, color); 124 } 125 } else if (animStep == ANIM_SLIDE) { 126 float fraction = (float) (timeDiff) / TIME_SLIDE; 127 float x = mX; 128 float y = mY; 129 if (mAnimOrientation == 0 || mAnimOrientation == 180) { 130 x = x + mDelta * mSlideInterpolator.getInterpolation(fraction); 131 } else { 132 y = y + mDelta * mSlideInterpolator.getInterpolation(fraction); 133 } 134 // float alpha = canvas.getAlpha(); 135 // canvas.setAlpha(fraction); 136 preview.directDraw(canvas, (int) mX, (int) mY, 137 mDrawWidth, mDrawHeight); 138 // canvas.setAlpha(alpha); 139 140 review.draw(canvas, (int) x, (int) y, mDrawWidth, mDrawHeight); 141 } else { 142 return false; 143 } 144 return true; 145 } 146 } 147