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 18 package com.android.test.hwui; 19 20 import android.app.Activity; 21 import android.content.Context; 22 import android.graphics.Bitmap; 23 import android.graphics.BitmapFactory; 24 import android.graphics.Canvas; 25 import android.graphics.Color; 26 import android.graphics.LinearGradient; 27 import android.graphics.Paint; 28 import android.graphics.PorterDuff; 29 import android.graphics.PorterDuffXfermode; 30 import android.graphics.Shader; 31 import android.os.Bundle; 32 import android.view.View; 33 34 @SuppressWarnings({"UnusedDeclaration"}) 35 public class FramebufferBlendActivity extends Activity { 36 @Override onCreate(Bundle savedInstanceState)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 BlendView(Context c)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 onDraw(Canvas canvas)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 drawBlendedBitmap(Canvas canvas, PorterDuff.Mode mode)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 drawBlendedBitmapInverse(Canvas canvas, PorterDuff.Mode mode)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