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.os.Bundle;
24import android.util.Log;
25import android.view.Gravity;
26import android.view.View;
27import android.view.animation.AlphaAnimation;
28import android.view.animation.Animation;
29import android.widget.FrameLayout;
30
31@SuppressWarnings({"UnusedDeclaration"})
32public class AlphaLayersActivity extends Activity {
33    private static final String LOG_TAG = "HwUi";
34
35    @Override
36    protected void onCreate(Bundle savedInstanceState) {
37        super.onCreate(savedInstanceState);
38
39        DirtyBitmapView container = new DirtyBitmapView(this);
40
41        ColorView color = new ColorView(this);
42        container.addView(color, new DirtyBitmapView.LayoutParams(
43                dipToPx(this, 100), dipToPx(this, 100), Gravity.CENTER));
44
45        AlphaAnimation a = new AlphaAnimation(1.0f, 0.0f);
46        a.setDuration(2000);
47        a.setRepeatCount(Animation.INFINITE);
48        a.setRepeatMode(Animation.REVERSE);
49        color.startAnimation(a);
50
51        setContentView(container);
52    }
53
54    @SuppressWarnings({"UnusedDeclaration"})
55    static int dipToPx(Context c, int dip) {
56        return (int) (c.getResources().getDisplayMetrics().density * dip + 0.5f);
57    }
58
59    static class ColorView extends View {
60        ColorView(Context c) {
61            super(c);
62        }
63
64        @Override
65        protected void onDraw(Canvas canvas) {
66            super.onDraw(canvas);
67            canvas.drawRGB(0, 255, 0);
68        }
69    }
70
71    static class DirtyBitmapView extends FrameLayout {
72        private final Paint mPaint;
73
74        DirtyBitmapView(Context c) {
75            super(c);
76            mPaint = new Paint();
77        }
78
79        @Override
80        public void dispatchDraw(Canvas canvas) {
81            canvas.drawRGB(255, 255, 255);
82
83            mPaint.setColor(0xffff0000);
84            canvas.drawRect(200.0f, 0.0f, 220.0f, 20.0f, mPaint);
85
86            canvas.save();
87            canvas.clipRect(20.0f, 0.0f, 40.0f, 20.0f);
88            Log.d(LOG_TAG, "clipRect = " + canvas.getClipBounds());
89            Log.d(LOG_TAG, "rejected = " + canvas.quickReject(100.0f, 100.0f, 110.0f, 110.0f,
90                    Canvas.EdgeType.BW));
91            Log.d(LOG_TAG, "rejected = " + canvas.quickReject(25.0f, 5.0f, 30.0f, 10.0f,
92                    Canvas.EdgeType.BW));
93            canvas.restore();
94
95            canvas.save();
96            canvas.scale(2.0f, 2.0f);
97            canvas.clipRect(20.0f, 0.0f, 40.0f, 20.0f);
98            Log.d(LOG_TAG, "clipRect = " + canvas.getClipBounds());
99            Log.d(LOG_TAG, "rejected = " + canvas.quickReject(50.0f, 50.0f, 60.0f, 60.0f,
100                    Canvas.EdgeType.BW));
101            Log.d(LOG_TAG, "rejected = " + canvas.quickReject(25.0f, 5.0f, 30.0f, 10.0f,
102                    Canvas.EdgeType.BW));
103            canvas.restore();
104
105            canvas.save();
106            canvas.translate(20.0f, 20.0f);
107            canvas.clipRect(20.0f, 0.0f, 40.0f, 20.0f);
108            Log.d(LOG_TAG, "clipRect = " + canvas.getClipBounds());
109            Log.d(LOG_TAG, "rejected = " + canvas.quickReject(80.0f, 80.0f, 90.0f, 90.0f,
110                    Canvas.EdgeType.BW));
111            Log.d(LOG_TAG, "rejected = " + canvas.quickReject(25.0f, 5.0f, 30.0f, 10.0f,
112                    Canvas.EdgeType.BW));
113            canvas.restore();
114
115            canvas.save();
116            canvas.scale(2.0f, 2.0f);
117            canvas.clipRect(20.0f, 0.0f, 40.0f, 20.0f);
118
119            mPaint.setColor(0xff00ff00);
120            canvas.drawRect(0.0f, 0.0f, 20.0f, 20.0f, mPaint);
121
122            mPaint.setColor(0xff0000ff);
123            canvas.drawRect(20.0f, 0.0f, 40.0f, 20.0f, mPaint);
124
125            canvas.restore();
126
127            final int restoreTo = canvas.save();
128            canvas.saveLayerAlpha(0.0f, 100.0f, getWidth(), 150.0f, 127,
129                    Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG);
130            mPaint.setColor(0xff0000ff);
131            canvas.drawRect(0.0f, 100.0f, 40.0f, 150.0f, mPaint);
132            mPaint.setColor(0xff00ffff);
133            canvas.drawRect(40.0f, 100.0f, 140.0f, 150.0f, mPaint);
134            mPaint.setColor(0xffff00ff);
135            canvas.drawRect(140.0f, 100.0f, 240.0f, 150.0f, mPaint);
136            canvas.restoreToCount(restoreTo);
137
138            super.dispatchDraw(canvas);
139        }
140    }
141}
142