1/*
2 * Copyright (C) 2010 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.test.hwui;
18
19import android.app.Activity;
20import android.content.Context;
21import android.graphics.Canvas;
22import android.graphics.Paint;
23import android.graphics.PorterDuff;
24import android.graphics.PorterDuffXfermode;
25import android.os.Bundle;
26import android.view.View;
27
28@SuppressWarnings({"UnusedDeclaration"})
29public class LayersActivity extends Activity {
30    @Override
31    protected void onCreate(Bundle savedInstanceState) {
32        super.onCreate(savedInstanceState);
33        setContentView(new LayersView(this));
34    }
35
36    public static class LayersView extends View {
37        private Paint mLayerPaint;
38        private final Paint mRectPaint;
39
40        public LayersView(Context c) {
41            super(c);
42
43            mLayerPaint = new Paint();
44            mRectPaint = new Paint();
45        }
46
47        @Override
48        protected void onDraw(Canvas canvas) {
49            super.onDraw(canvas);
50
51            canvas.translate(140.0f, 100.0f);
52
53            //canvas.drawRGB(255, 255, 255);
54
55            int count = canvas.saveLayer(0.0f, 0.0f, 200.0f, 100.0f, mLayerPaint,
56                    Canvas.ALL_SAVE_FLAG);
57
58            mRectPaint.setColor(0xffff0000);
59            canvas.drawRect(0.0f, 0.0f, 200.0f, 100.0f, mRectPaint);
60
61            canvas.restoreToCount(count);
62
63            canvas.translate(0.0f, 125.0f);
64
65            count = canvas.saveLayer(0.0f, 0.0f, 200.0f, 100.0f, mLayerPaint,
66                    Canvas.ALL_SAVE_FLAG);
67
68            mRectPaint.setColor(0xff00ff00);
69            mRectPaint.setAlpha(50);
70            canvas.drawRect(0.0f, 0.0f, 200.0f, 100.0f, mRectPaint);
71
72            canvas.restoreToCount(count);
73
74            canvas.translate(25.0f, 125.0f);
75
76            mRectPaint.setColor(0xff0000ff);
77            mRectPaint.setAlpha(255);
78            canvas.drawRect(0.0f, 0.0f, 100.0f, 50.0f, mRectPaint);
79
80            mLayerPaint.setAlpha(127);
81            mLayerPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OUT));
82            count = canvas.saveLayer(50.0f, 25.0f, 150.0f, 75.0f, mLayerPaint,
83                    Canvas.ALL_SAVE_FLAG);
84
85            mRectPaint.setColor(0xffff0000);
86            canvas.drawRect(50.0f, 25.0f, 150.0f, 75.0f, mRectPaint);
87
88            canvas.restoreToCount(count);
89
90            canvas.translate(0.0f, 125.0f);
91
92            mRectPaint.setColor(0xff0000ff);
93            mRectPaint.setAlpha(255);
94            canvas.drawRect(0.0f, 0.0f, 100.0f, 50.0f, mRectPaint);
95
96            mLayerPaint.setColor(0xffff0000);
97            mLayerPaint.setAlpha(127);
98            mLayerPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_ATOP));
99            count = canvas.saveLayer(50.0f, 25.0f, 150.0f, 75.0f, mLayerPaint,
100                    Canvas.ALL_SAVE_FLAG);
101
102            mRectPaint.setColor(0xffff0000);
103            canvas.drawRect(50.0f, 25.0f, 150.0f, 75.0f, mRectPaint);
104
105            canvas.restoreToCount(count);
106
107            mLayerPaint = new Paint();
108        }
109    }
110}
111