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.autofocus;
18 
19 import android.graphics.Rect;
20 import android.hardware.camera2.params.MeteringRectangle;
21 
22 import com.google.common.base.Supplier;
23 
24 /**
25  * Computes the current AE metering rectangles based on the current metering
26  * parameters and crop region.
27  */
28 class AEMeteringRegion implements Supplier<MeteringRectangle[]> {
29     private final Supplier<MeteringParameters> mMeteringParameters;
30     private final Supplier<Rect> mCropRegion;
31 
AEMeteringRegion(Supplier<MeteringParameters> meteringParameters, Supplier<Rect> cropRegion)32     public AEMeteringRegion(Supplier<MeteringParameters> meteringParameters,
33             Supplier<Rect> cropRegion) {
34         mMeteringParameters = meteringParameters;
35         mCropRegion = cropRegion;
36     }
37 
38     @Override
get()39     public MeteringRectangle[] get() {
40         return mMeteringParameters.get().getAERegions(mCropRegion.get());
41     }
42 }
43