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        private Matrix mMtx1;
56        private Matrix mMtx2;
57        private Matrix mMtx3;
58
59        public ShadersView(Context c) {
60            super(c);
61
62            mTexture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
63            mTexWidth = mTexture.getWidth();
64            mTexHeight = mTexture.getHeight();
65            mDrawWidth = mTexWidth * 2.2f;
66            mDrawHeight = mTexHeight * 1.2f;
67
68            mRepeatShader = new BitmapShader(mTexture, Shader.TileMode.REPEAT,
69                    Shader.TileMode.REPEAT);
70
71            mTranslatedShader = new BitmapShader(mTexture, Shader.TileMode.REPEAT,
72                    Shader.TileMode.REPEAT);
73            mMtx1 = new Matrix();
74            mMtx1.setTranslate(mTexWidth / 2.0f, mTexHeight / 2.0f);
75            mMtx1.postRotate(45, 0, 0);
76            mTranslatedShader.setLocalMatrix(mMtx1);
77
78            mScaledShader = new BitmapShader(mTexture, Shader.TileMode.MIRROR,
79                    Shader.TileMode.MIRROR);
80            mMtx2 = new Matrix();
81            mMtx2.setScale(0.5f, 0.5f);
82            mScaledShader.setLocalMatrix(mMtx2);
83
84            mHorGradient = new LinearGradient(0.0f, 0.0f, 1.0f, 0.0f,
85                    Color.RED, Color.GREEN, Shader.TileMode.CLAMP);
86            mMtx3 = new Matrix();
87            mMtx3.setScale(mDrawHeight, 1.0f);
88            mMtx3.postRotate(-90.0f);
89            mMtx3.postTranslate(0.0f, mDrawHeight);
90            mHorGradient.setLocalMatrix(mMtx3);
91
92            mDiagGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth / 1.5f, mDrawHeight,
93                    Color.BLUE, Color.MAGENTA, Shader.TileMode.CLAMP);
94
95            mVertGradient = new LinearGradient(0.0f, 0.0f, 0.0f, mDrawHeight / 2.0f,
96                    Color.YELLOW, Color.MAGENTA, Shader.TileMode.MIRROR);
97
98            mPaint = new Paint();
99        }
100
101        @Override
102        protected void onDraw(Canvas canvas) {
103            super.onDraw(canvas);
104            //canvas.drawRGB(255, 255, 255);
105            canvas.drawBitmap(mTexture, 0.0f, 0.0f, null);
106
107            // Bitmap shaders
108            canvas.save();
109            canvas.translate(40.0f, 40.0f);
110
111            mPaint.setShader(mRepeatShader);
112            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
113
114            canvas.translate(0.0f, 40.0f + mDrawHeight);
115            mPaint.setShader(mTranslatedShader);
116            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
117
118            canvas.translate(0.0f, 40.0f + mDrawHeight);
119            mPaint.setShader(mScaledShader);
120            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
121
122            canvas.restore();
123
124            // Gradients
125            canvas.save();
126            canvas.translate(40.0f + mDrawWidth + 40.0f, 40.0f);
127
128            mPaint.setShader(mHorGradient);
129            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
130
131            canvas.translate(0.0f, 40.0f + mDrawHeight);
132            mPaint.setShader(mDiagGradient);
133            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
134
135            canvas.translate(0.0f, 40.0f + mDrawHeight);
136            mPaint.setShader(mVertGradient);
137            canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
138
139            canvas.restore();
140        }
141    }
142}
143