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 package com.android.test.hwui;
18 
19 import android.app.Activity;
20 import android.content.Context;
21 import android.graphics.Bitmap;
22 import android.graphics.BitmapFactory;
23 import android.graphics.BitmapShader;
24 import android.graphics.Canvas;
25 import android.graphics.Color;
26 import android.graphics.ColorFilter;
27 import android.graphics.ComposeShader;
28 import android.graphics.LightingColorFilter;
29 import android.graphics.LinearGradient;
30 import android.graphics.Matrix;
31 import android.graphics.Paint;
32 import android.graphics.PorterDuff;
33 import android.graphics.Shader;
34 import android.os.Bundle;
35 import android.view.View;
36 
37 @SuppressWarnings({"UnusedDeclaration"})
38 public class MoreShadersActivity extends Activity {
39     @Override
onCreate(Bundle savedInstanceState)40     protected void onCreate(Bundle savedInstanceState) {
41         super.onCreate(savedInstanceState);
42 
43         setContentView(new ShadersView(this));
44     }
45 
46     static class ShadersView extends View {
47         private BitmapShader mScaledShader;
48         private int mTexWidth;
49         private int mTexHeight;
50         private Paint mPaint;
51         private float mDrawWidth;
52         private float mDrawHeight;
53         private LinearGradient mHorGradient;
54         private LinearGradient mVertGradient;
55         private ComposeShader mComposeShader;
56         private ComposeShader mCompose2Shader;
57         private Paint mLargePaint;
58         private BitmapShader mScaled2Shader;
59         private ColorFilter mColorFilter;
60         private final Matrix mMtx1;
61 
ShadersView(Context c)62         ShadersView(Context c) {
63             super(c);
64 
65             Bitmap texture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
66             mTexWidth = texture.getWidth();
67             mTexHeight = texture.getHeight();
68             mDrawWidth = mTexWidth * 2.2f;
69             mDrawHeight = mTexHeight * 1.2f;
70 
71             mScaledShader = new BitmapShader(texture, Shader.TileMode.MIRROR,
72                     Shader.TileMode.MIRROR);
73             Matrix m2 = new Matrix();
74             m2.setScale(0.1f, 0.1f);
75             mScaledShader.setLocalMatrix(m2);
76 
77             mScaled2Shader = new BitmapShader(texture, Shader.TileMode.MIRROR,
78                     Shader.TileMode.MIRROR);
79             Matrix m3 = new Matrix();
80             m3.setScale(0.1f, 0.1f);
81             mScaled2Shader.setLocalMatrix(m3);
82 
83             mHorGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth, 0.0f,
84                     Color.RED, 0x7f00ff00, Shader.TileMode.CLAMP);
85             Matrix m4 = new Matrix();
86             m4.setScale(0.5f, 0.5f);
87             mHorGradient.setLocalMatrix(m4);
88 
89             mVertGradient = new LinearGradient(0.0f, 0.0f, 0.0f, mDrawHeight / 2.0f,
90                     Color.YELLOW, Color.MAGENTA, Shader.TileMode.MIRROR);
91 
92             mComposeShader = new ComposeShader(mScaledShader, mHorGradient,
93                     PorterDuff.Mode.SRC_OVER);
94             mMtx1 = new Matrix();
95             mMtx1.setTranslate(mTexWidth / 2.0f, mTexHeight / 2.0f);
96             mMtx1.postRotate(45, 0, 0);
97             mComposeShader.setLocalMatrix(mMtx1);
98 
99             mCompose2Shader = new ComposeShader(mHorGradient, mScaledShader,
100                     PorterDuff.Mode.SRC_OUT);
101 
102             mColorFilter = new LightingColorFilter(0x0060ffff, 0x00101030);
103 
104             mLargePaint = new Paint();
105             mLargePaint.setAntiAlias(true);
106             mLargePaint.setTextSize(36.0f);
107             mLargePaint.setColor(0xff000000);
108             mLargePaint.setShadowLayer(3.0f, 0.0f, 3.0f, 0x7f00ff00);
109 
110             mPaint = new Paint();
111         }
112 
113         @Override
onDraw(Canvas canvas)114         protected void onDraw(Canvas canvas) {
115             super.onDraw(canvas);
116             canvas.drawRGB(255, 255, 255);
117 
118             canvas.save();
119             canvas.translate(40.0f, 40.0f);
120 
121             mPaint.setShader(mComposeShader);
122             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
123 
124             canvas.translate(0.0f, 40.0f + mDrawHeight);
125             mPaint.setShader(mCompose2Shader);
126             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
127 
128             canvas.restore();
129 
130             canvas.save();
131             canvas.translate(40.0f + mDrawWidth + 40.0f, 40.0f);
132 
133             mLargePaint.setShader(mHorGradient);
134             canvas.drawText("OpenGL rendering", 0.0f, 20.0f, mLargePaint);
135 
136             mLargePaint.setShader(mScaled2Shader);
137             canvas.drawText("OpenGL rendering", 0.0f, 60.0f, mLargePaint);
138 
139             mLargePaint.setShader(mCompose2Shader);
140             mLargePaint.setColorFilter(mColorFilter);
141             canvas.drawText("OpenGL rendering", 0.0f, 100.0f, mLargePaint);
142             mLargePaint.setColorFilter(null);
143 
144             canvas.translate(0.0f, 40.0f + mDrawHeight);
145             mLargePaint.setShader(mVertGradient);
146             canvas.drawText("OpenGL rendering", 0.0f, 20.0f, mLargePaint);
147 
148             canvas.restore();
149         }
150     }
151 }
152