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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.camera;
import android.graphics.Color;
import android.os.SystemClock;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import com.android.gallery3d.glrenderer.GLCanvas;
import com.android.gallery3d.glrenderer.RawTexture;
/**
* Class to handle the capture animation.
*/
public class CaptureAnimManager {
@SuppressWarnings("unused")
private static final String TAG = "CAM_Capture";
private static final int TIME_FLASH = 200;
private static final int TIME_HOLD = 400;
private static final int TIME_SLIDE = 400; // milliseconds.
private static final int ANIM_BOTH = 0;
private static final int ANIM_FLASH = 1;
private static final int ANIM_SLIDE = 2;
private final Interpolator mSlideInterpolator = new DecelerateInterpolator();
private int mAnimOrientation; // Could be 0, 90, 180 or 270 degrees.
private long mAnimStartTime; // milliseconds.
private float mX; // The center of the whole view including preview and review.
private float mY;
private float mDelta;
private int mDrawWidth;
private int mDrawHeight;
private int mAnimType;
/* preview: camera preview view.
* review: view of picture just taken.
*/
public CaptureAnimManager() {
}
public void setOrientation(int displayRotation) {
mAnimOrientation = (360 - displayRotation) % 360;
}
public void animateSlide() {
if (mAnimType != ANIM_FLASH) {
return;
}
mAnimType = ANIM_SLIDE;
mAnimStartTime = SystemClock.uptimeMillis();
}
public void animateFlash() {
mAnimType = ANIM_FLASH;
}
public void animateFlashAndSlide() {
mAnimType = ANIM_BOTH;
}
// x, y, w and h: the rectangle area where the animation takes place.
public void startAnimation(int x, int y, int w, int h) {
mAnimStartTime = SystemClock.uptimeMillis();
// Set the views to the initial positions.
mDrawWidth = w;
mDrawHeight = h;
mX = x;
mY = y;
switch (mAnimOrientation) {
case 0: // Preview is on the left.
mDelta = w;
break;
case 90: // Preview is below.
mDelta = -h;
break;
case 180: // Preview on the right.
mDelta = -w;
break;
case 270: // Preview is above.
mDelta = h;
break;
}
}
// Returns true if the animation has been drawn.
public boolean drawAnimation(GLCanvas canvas, CameraScreenNail preview,
RawTexture review) {
long timeDiff = SystemClock.uptimeMillis() - mAnimStartTime;
// Check if the animation is over
if (mAnimType == ANIM_SLIDE && timeDiff > TIME_SLIDE) return false;
if (mAnimType == ANIM_BOTH && timeDiff > TIME_HOLD + TIME_SLIDE) return false;
int animStep = mAnimType;
if (mAnimType == ANIM_BOTH) {
animStep = (timeDiff < TIME_HOLD) ? ANIM_FLASH : ANIM_SLIDE;
if (animStep == ANIM_SLIDE) {
timeDiff -= TIME_HOLD;
}
}
if (animStep == ANIM_FLASH) {
review.draw(canvas, (int) mX, (int) mY, mDrawWidth, mDrawHeight);
if (timeDiff < TIME_FLASH) {
float f = 0.3f - 0.3f * timeDiff / TIME_FLASH;
int color = Color.argb((int) (255 * f), 255, 255, 255);
canvas.fillRect(mX, mY, mDrawWidth, mDrawHeight, color);
}
} else if (animStep == ANIM_SLIDE) {
float fraction = (float) (timeDiff) / TIME_SLIDE;
float x = mX;
float y = mY;
if (mAnimOrientation == 0 || mAnimOrientation == 180) {
x = x + mDelta * mSlideInterpolator.getInterpolation(fraction);
} else {
y = y + mDelta * mSlideInterpolator.getInterpolation(fraction);
}
// float alpha = canvas.getAlpha();
// canvas.setAlpha(fraction);
preview.directDraw(canvas, (int) mX, (int) mY,
mDrawWidth, mDrawHeight);
// canvas.setAlpha(alpha);
review.draw(canvas, (int) x, (int) y, mDrawWidth, mDrawHeight);
} else {
return false;
}
return true;
}
}
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