ShadersActivity.java revision f607bdc167f66b3e7003acaa4736ae46d78c1492
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 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 55 ShadersView(Context c) { 56 super(c); 57 58 Bitmap texture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1); 59 mTexWidth = texture.getWidth(); 60 mTexHeight = texture.getHeight(); 61 mDrawWidth = mTexWidth * 2.2f; 62 mDrawHeight = mTexHeight * 1.2f; 63 64 mRepeatShader = new BitmapShader(texture, Shader.TileMode.REPEAT, 65 Shader.TileMode.REPEAT); 66 67 mTranslatedShader = new BitmapShader(texture, Shader.TileMode.REPEAT, 68 Shader.TileMode.REPEAT); 69 Matrix m1 = new Matrix(); 70 m1.setTranslate(mTexWidth / 2.0f, mTexHeight / 2.0f); 71 m1.postRotate(45, 0, 0); 72 mTranslatedShader.setLocalMatrix(m1); 73 74 mScaledShader = new BitmapShader(texture, Shader.TileMode.MIRROR, 75 Shader.TileMode.MIRROR); 76 Matrix m2 = new Matrix(); 77 m2.setScale(0.5f, 0.5f); 78 mScaledShader.setLocalMatrix(m2); 79 80 mHorGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth, 0.0f, 81 Color.RED, Color.GREEN, Shader.TileMode.CLAMP); 82 83 mDiagGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth / 1.5f, mDrawHeight, 84 Color.BLUE, Color.MAGENTA, Shader.TileMode.CLAMP); 85 86 mVertGradient = new LinearGradient(0.0f, 0.0f, 0.0f, mDrawHeight / 2.0f, 87 Color.YELLOW, Color.MAGENTA, Shader.TileMode.MIRROR); 88 89 mPaint = new Paint(); 90 } 91 92 @Override 93 protected void onDraw(Canvas canvas) { 94 super.onDraw(canvas); 95 //canvas.drawRGB(255, 255, 255); 96 97 // Bitmap shaders 98 canvas.save(); 99 canvas.translate(40.0f, 40.0f); 100 101 mPaint.setShader(mRepeatShader); 102 canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint); 103 104 canvas.translate(0.0f, 40.0f + mDrawHeight); 105 mPaint.setShader(mTranslatedShader); 106 canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint); 107 108 canvas.translate(0.0f, 40.0f + mDrawHeight); 109 mPaint.setShader(mScaledShader); 110 canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint); 111 112 canvas.restore(); 113 114 // Gradients 115 canvas.save(); 116 canvas.translate(40.0f + mDrawWidth + 40.0f, 40.0f); 117 118 mPaint.setShader(mHorGradient); 119 canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint); 120 121 canvas.translate(0.0f, 40.0f + mDrawHeight); 122 mPaint.setShader(mDiagGradient); 123 canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint); 124 125 canvas.translate(0.0f, 40.0f + mDrawHeight); 126 mPaint.setShader(mVertGradient); 127 canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint); 128 129 canvas.restore(); 130 } 131 } 132} 133