FaceView.java revision d480002ccad05cf992c628c72884091c36cc654c 
1/*
2 * Copyright (C) 2011 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
17package com.android.camera.ui;
18
19import com.android.camera.R;
20import com.android.camera.Util;
21
22import android.content.Context;
23import android.graphics.Canvas;
24import android.graphics.Matrix;
25import android.graphics.RectF;
26import android.graphics.drawable.Drawable;
27import android.hardware.Camera.Face;
28import android.util.AttributeSet;
29import android.util.Log;
30import android.view.View;
31
32public class FaceView extends View {
33    private final String TAG = "FaceView";
34    private final boolean LOGV = false;
35    private int mDisplayOrientation;
36    private boolean mMirror;
37    private boolean mPause;
38    private Matrix mMatrix = new Matrix();
39    private RectF mRect = new RectF();
40    private Face[] mFaces;
41    private Drawable mFaceRect;
42
43    public FaceView(Context context, AttributeSet attrs) {
44        super(context, attrs);
45        mFaceRect = getResources().getDrawable(R.drawable.focus_focused);
46    }
47
48    public void setFaces(Face[] faces) {
49        if (LOGV) Log.v(TAG, "Num of faces=" + faces.length);
50        if (mPause) return;
51        mFaces = faces;
52        invalidate();
53    }
54
55    public void setDisplayOrientation(int orientation) {
56        mDisplayOrientation = orientation;
57        if (LOGV) Log.v(TAG, "mDisplayOrientation=" + orientation);
58    }
59
60    public void setMirror(boolean mirror) {
61        mMirror = mirror;
62        if (LOGV) Log.v(TAG, "mMirror=" + mirror);
63    }
64
65    public boolean faceExists() {
66        return (mFaces != null && mFaces.length > 0);
67    }
68
69    public void clearFaces() {
70        mFaces = null;
71        invalidate();
72    }
73
74    public void pause() {
75        mPause = true;
76    }
77
78    public void resume() {
79        mPause = false;
80    }
81
82    private void dumpRect(RectF rect, String msg) {
83        Log.v(TAG, msg + "=(" + rect.left + "," + rect.top
84                + "," + rect.right + "," + rect.bottom + ")");
85    }
86
87    @Override
88    protected void onDraw(Canvas canvas) {
89        if (mFaces != null && mFaces.length > 0) {
90            // Prepare the matrix.
91            Util.prepareMatrix(mMatrix, mMirror, mDisplayOrientation, getWidth(),
92                    getHeight());
93
94            for (int i = 0; i < mFaces.length; i++) {
95                // Transform the coordinates.
96                mRect.set(mFaces[i].rect);
97                if (LOGV) dumpRect(mRect, "Original rect");
98                mMatrix.mapRect(mRect);
99                if (LOGV) dumpRect(mRect, "Transformed rect");
100
101                mFaceRect.setBounds(Math.round(mRect.left), Math.round(mRect.top),
102                        Math.round(mRect.right), Math.round(mRect.bottom));
103                mFaceRect.draw(canvas);
104            }
105        }
106        super.onDraw(canvas);
107    }
108}
109