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
17
18package com.android.test.hwui;
19
20import android.app.Activity;
21import android.content.Context;
22import android.graphics.Bitmap;
23import android.graphics.BitmapFactory;
24import android.graphics.Canvas;
25import android.graphics.Color;
26import android.graphics.LinearGradient;
27import android.graphics.Paint;
28import android.graphics.PorterDuff;
29import android.graphics.PorterDuffXfermode;
30import android.graphics.Shader;
31import android.os.Bundle;
32import android.view.View;
33
34@SuppressWarnings({"UnusedDeclaration"})
35public class FramebufferBlendActivity extends Activity {
36    @Override
37    protected void onCreate(Bundle savedInstanceState) {
38        super.onCreate(savedInstanceState);
39
40        setContentView(new BlendView(this));
41    }
42
43    static class BlendView extends View {
44        private int mTexWidth;
45        private int mTexHeight;
46        private Paint mPaint;
47        private LinearGradient mHorGradient;
48        private Bitmap mTexture;
49
50        BlendView(Context c) {
51            super(c);
52
53            mTexture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
54            mTexWidth = mTexture.getWidth();
55            mTexHeight = mTexture.getHeight();
56
57            mHorGradient = new LinearGradient(0.0f, 0.0f, mTexWidth, 0.0f,
58                    Color.BLACK, Color.WHITE, Shader.TileMode.CLAMP);
59
60            mPaint = new Paint();
61        }
62
63        @Override
64        protected void onDraw(Canvas canvas) {
65            super.onDraw(canvas);
66            canvas.drawRGB(255, 255, 255);
67
68            canvas.save();
69            canvas.translate(40.0f, 40.0f);
70
71            drawBlendedBitmap(canvas, PorterDuff.Mode.DARKEN);
72            drawBlendedBitmap(canvas, PorterDuff.Mode.LIGHTEN);
73            drawBlendedBitmap(canvas, PorterDuff.Mode.MULTIPLY);
74
75            canvas.restore();
76
77            canvas.save();
78            canvas.translate(40.0f + mTexWidth + 40.0f, 40.0f);
79
80            drawBlendedBitmap(canvas, PorterDuff.Mode.SCREEN);
81            drawBlendedBitmap(canvas, PorterDuff.Mode.ADD);
82            drawBlendedBitmapInverse(canvas, PorterDuff.Mode.OVERLAY);
83
84            canvas.restore();
85        }
86
87        private void drawBlendedBitmap(Canvas canvas, PorterDuff.Mode mode) {
88            mPaint.setShader(null);
89            mPaint.setXfermode(null);
90            canvas.drawBitmap(mTexture, 0.0f, 0.0f, mPaint);
91
92            mPaint.setShader(mHorGradient);
93            mPaint.setXfermode(new PorterDuffXfermode(mode));
94            canvas.drawRect(0.0f, 0.0f, mTexWidth, mTexHeight, mPaint);
95
96            canvas.translate(0.0f, 40.0f + mTexHeight);
97        }
98
99        private void drawBlendedBitmapInverse(Canvas canvas, PorterDuff.Mode mode) {
100            mPaint.setXfermode(null);
101            mPaint.setShader(mHorGradient);
102            canvas.drawRect(0.0f, 0.0f, mTexWidth, mTexHeight, mPaint);
103
104            mPaint.setXfermode(new PorterDuffXfermode(mode));
105            mPaint.setShader(null);
106            canvas.drawBitmap(mTexture, 0.0f, 0.0f, mPaint);
107
108            canvas.translate(0.0f, 40.0f + mTexHeight);
109        }
110    }
111}
112