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      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.ComposeShader;
     27 import android.graphics.LinearGradient;
     28 import android.graphics.Matrix;
     29 import android.graphics.Paint;
     30 import android.graphics.PorterDuff;
     31 import android.graphics.Shader;
     32 import android.os.Bundle;
     33 import android.view.View;
     34 
     35 @SuppressWarnings({"UnusedDeclaration"})
     36 public class AdvancedBlendActivity extends Activity {
     37     @Override
     38     protected void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40 
     41         setContentView(new ShadersView(this));
     42     }
     43 
     44     public static class ShadersView extends View {
     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 ComposeShader mComposeShader;
     53         private ComposeShader mCompose2Shader;
     54         private ComposeShader mCompose3Shader;
     55         private ComposeShader mCompose4Shader;
     56         private ComposeShader mCompose5Shader;
     57         private ComposeShader mCompose6Shader;
     58         private BitmapShader mScaled2Shader;
     59 
     60         public ShadersView(Context c) {
     61             super(c);
     62 
     63             Bitmap texture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
     64             mTexWidth = texture.getWidth();
     65             mTexHeight = texture.getHeight();
     66             mDrawWidth = mTexWidth * 2.2f;
     67             mDrawHeight = mTexHeight * 1.2f;
     68 
     69             mScaledShader = new BitmapShader(texture, Shader.TileMode.MIRROR,
     70                     Shader.TileMode.MIRROR);
     71             Matrix m2 = new Matrix();
     72             m2.setScale(0.5f, 0.5f);
     73             mScaledShader.setLocalMatrix(m2);
     74 
     75             mScaled2Shader = new BitmapShader(texture, Shader.TileMode.MIRROR,
     76                     Shader.TileMode.MIRROR);
     77             Matrix m3 = new Matrix();
     78             m3.setScale(0.1f, 0.1f);
     79             mScaled2Shader.setLocalMatrix(m3);
     80 
     81             mHorGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth, 0.0f,
     82                     Color.BLACK, Color.WHITE, Shader.TileMode.CLAMP);
     83 
     84             mComposeShader = new ComposeShader(mScaledShader, mHorGradient,
     85                     PorterDuff.Mode.DARKEN);
     86             mCompose2Shader = new ComposeShader(mScaledShader, mHorGradient,
     87                     PorterDuff.Mode.LIGHTEN);
     88             mCompose3Shader = new ComposeShader(mScaledShader, mHorGradient,
     89                     PorterDuff.Mode.MULTIPLY);
     90             mCompose4Shader = new ComposeShader(mScaledShader, mHorGradient,
     91                     PorterDuff.Mode.SCREEN);
     92             mCompose5Shader = new ComposeShader(mScaledShader, mHorGradient,
     93                     PorterDuff.Mode.ADD);
     94             mCompose6Shader = new ComposeShader(mHorGradient, mScaledShader,
     95                     PorterDuff.Mode.OVERLAY);
     96 
     97             mPaint = new Paint();
     98         }
     99 
    100         @Override
    101         protected void onDraw(Canvas canvas) {
    102             super.onDraw(canvas);
    103             canvas.drawRGB(255, 255, 255);
    104 
    105             canvas.save();
    106             canvas.translate(40.0f, 40.0f);
    107 
    108             mPaint.setShader(mComposeShader);
    109             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
    110 
    111             canvas.translate(0.0f, 40.0f + mDrawHeight);
    112             mPaint.setShader(mCompose2Shader);
    113             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
    114 
    115             canvas.translate(0.0f, 40.0f + mDrawHeight);
    116             mPaint.setShader(mCompose3Shader);
    117             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
    118 
    119             canvas.restore();
    120 
    121             canvas.save();
    122             canvas.translate(40.0f + mDrawWidth + 40.0f, 40.0f);
    123 
    124             mPaint.setShader(mCompose4Shader);
    125             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
    126 
    127             canvas.translate(0.0f, 40.0f + mDrawHeight);
    128             mPaint.setShader(mCompose5Shader);
    129             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
    130 
    131             canvas.translate(0.0f, 40.0f + mDrawHeight);
    132             mPaint.setShader(mCompose6Shader);
    133             canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
    134 
    135             canvas.restore();
    136         }
    137     }
    138 }
    139