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      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      */
     55     public CaptureAnimManager() {
     56     }
     57 
     58     public void setOrientation(int displayRotation) {
     59         mAnimOrientation = (360 - displayRotation) % 360;
     60     }
     61 
     62     public void animateSlide() {
     63         if (mAnimType != ANIM_FLASH) {
     64             return;
     65         }
     66         mAnimType = ANIM_SLIDE;
     67         mAnimStartTime = SystemClock.uptimeMillis();
     68     }
     69 
     70     public void animateFlash() {
     71         mAnimType = ANIM_FLASH;
     72     }
     73 
     74     public void animateFlashAndSlide() {
     75         mAnimType = ANIM_BOTH;
     76     }
     77 
     78     // x, y, w and h: the rectangle area where the animation takes place.
     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.
    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