ShadersActivity.java revision d348b6eaa98e23cb38d90906df109aaa2d20ea7f 
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.Bitmap;
22import android.graphics.BitmapFactory;
23import android.graphics.BitmapShader;
24import android.graphics.Canvas;
25import android.graphics.Color;
26import android.graphics.LinearGradient;
27import android.graphics.Matrix;
28import android.graphics.Paint;
29import android.graphics.Shader;
30import android.os.Bundle;
31import android.view.View;
32
33@SuppressWarnings({"UnusedDeclaration"})
34public class ShadersActivity extends Activity {
35    @Override
36    protected void onCreate(Bundle savedInstanceState) {
37        super.onCreate(savedInstanceState);
38
39        setContentView(new ShadersView(this));
40    }
41
42    public static class ShadersView extends View {
43        private BitmapShader mRepeatShader;
44        private BitmapShader mTranslatedShader;
45        private BitmapShader mScaledShader;
46        private int mTexWidth;
47        private int mTexHeight;
48        private Paint mPaint;
49        private float mDrawWidth;
50        private float mDrawHeight;
51        private LinearGradient mHorGradient;
52        private LinearGradient mDiagGradient;
53        private LinearGradient mVertGradient;
54        private Bitmap mTexture;
55
56        public ShadersView(Context c) {
57            super(c);
58
59            mTexture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
60            mTexWidth = mTexture.getWidth();
61            mTexHeight = mTexture.getHeight();
62            mDrawWidth = mTexWidth * 2.2f;
63            mDrawHeight = mTexHeight * 1.2f;
64
65            mRepeatShader = new BitmapShader(mTexture, Shader.TileMode.REPEAT,
66                    Shader.TileMode.REPEAT);
67
68            mTranslatedShader = new BitmapShader(mTexture, Shader.TileMode.REPEAT,
69                    Shader.TileMode.REPEAT);
70            Matrix m1 = new Matrix();
71            m1.setTranslate(mTexWidth / 2.0f, mTexHeight / 2.0f);
72            m1.postRotate(45, 0, 0);
73            mTranslatedShader.setLocalMatrix(m1);
74
75            mScaledShader = new BitmapShader(mTexture, Shader.TileMode.MIRROR,
76                    Shader.TileMode.MIRROR);
77            Matrix m2 = new Matrix();
78            m2.setScale(0.5f, 0.5f);
79            mScaledShader.setLocalMatrix(m2);
80
81            mHorGradient = new LinearGradient(0.0f, 0.0f, 1.0f, 0.0f,
82                    Color.RED, Color.GREEN, Shader.TileMode.CLAMP);
83            Matrix m3 = new Matrix();
84            m3.setScale(mDrawHeight, 1.0f);
85            m3.postRotate(-90.0f);
86            m3.postTranslate(0.0f, mDrawHeight);
87            mHorGradient.setLocalMatrix(m3);
88
89            mDiagGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth / 1.5f, mDrawHeight,
90                    Color.BLUE, Color.MAGENTA, Shader.TileMode.CLAMP);
91
92            mVertGradient = new LinearGradient(0.0f, 0.0f, 0.0f, mDrawHeight / 2.0f,
93                    Color.YELLOW, Color.MAGENTA, Shader.TileMode.MIRROR);
94
95            mPaint = new Paint();
96        }
97
98        @Override
99        protected void onDraw(Canvas canvas) {
100            super.onDraw(canvas);
101            //canvas.drawRGB(255, 255, 255);
102            canvas.drawBitmap(mTexture, 0.0f, 0.0f, null);
103
104            // Bitmap shaders
105            canvas.save();
106            canvas.translate(40.0f, 40.0f);
107
108            mPaint.setShader(mRepeatShader);
109            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
110
111            canvas.translate(0.0f, 40.0f + mDrawHeight);
112            mPaint.setShader(mTranslatedShader);
113            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
114
115            canvas.translate(0.0f, 40.0f + mDrawHeight);
116            mPaint.setShader(mScaledShader);
117            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
118
119            canvas.restore();
120
121            // Gradients
122            canvas.save();
123            canvas.translate(40.0f + mDrawWidth + 40.0f, 40.0f);
124
125            mPaint.setShader(mHorGradient);
126            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
127
128            canvas.translate(0.0f, 40.0f + mDrawHeight);
129            mPaint.setShader(mDiagGradient);
130            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
131
132            canvas.translate(0.0f, 40.0f + mDrawHeight);
133            mPaint.setShader(mVertGradient);
134            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
135
136            canvas.restore();
137        }
138    }
139}
140