1 /*
2  * Copyright (C) 2014 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.one.v2.common;
18 
19 import android.graphics.Rect;
20 import android.hardware.camera2.CameraCharacteristics;
21 
22 import com.google.common.base.Supplier;
23 
24 /**
25  * Computes the current crop region based on the current zoom.
26  */
27 public class ZoomedCropRegion implements Supplier<Rect> {
28     private final Rect mSensorArrayArea;
29     private final Supplier<Float> mZoom;
30 
ZoomedCropRegion(Rect sensorArrayArea, Supplier<Float> zoom)31     public ZoomedCropRegion(Rect sensorArrayArea, Supplier<Float> zoom) {
32         mSensorArrayArea = sensorArrayArea;
33         mZoom = zoom;
34     }
35 
36     @Override
get()37     public Rect get() {
38         float zoom = mZoom.get();
39         Rect sensor = mSensorArrayArea;
40         int xCenter = sensor.width() / 2;
41         int yCenter = sensor.height() / 2;
42         int xDelta = (int) (0.5f * sensor.width() / zoom);
43         int yDelta = (int) (0.5f * sensor.height() / zoom);
44         return new Rect(xCenter - xDelta, yCenter - yDelta, xCenter + xDelta, yCenter + yDelta);
45     }
46 }
47