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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.Canvas;
     22 import android.graphics.Paint;
     23 import android.graphics.PorterDuff;
     24 import android.graphics.PorterDuffXfermode;
     25 import android.os.Bundle;
     26 import android.view.View;
     27 
     28 import static android.graphics.PorterDuff.Mode;
     29 
     30 @SuppressWarnings({"UnusedDeclaration"})
     31 public class XfermodeActivity extends Activity {
     32     @Override
     33     protected void onCreate(Bundle savedInstanceState) {
     34         super.onCreate(savedInstanceState);
     35 
     36         setContentView(new XfermodesView(this));
     37     }
     38 
     39     static class XfermodesView extends View {
     40         private final Paint mBluePaint;
     41         private final Paint mRedPaint;
     42 
     43         XfermodesView(Context c) {
     44             super(c);
     45 
     46             mBluePaint = new Paint();
     47             mBluePaint.setColor(0xff0000ff);
     48 
     49             mRedPaint = new Paint();
     50             mRedPaint.setColor(0x7fff0000);
     51         }
     52 
     53         @Override
     54         protected void onDraw(Canvas canvas) {
     55             super.onDraw(canvas);
     56             //canvas.drawRGB(255, 255, 255);
     57 
     58             canvas.translate(100.0f, 100.0f);
     59 
     60             // SRC modes
     61             canvas.save();
     62 
     63             drawRects(canvas, Mode.SRC_OVER);
     64             canvas.translate(0.0f, 100.0f);
     65 
     66             drawRects(canvas, Mode.SRC_IN);
     67             canvas.translate(0.0f, 100.0f);
     68 
     69             drawRects(canvas, Mode.SRC_OUT);
     70             canvas.translate(0.0f, 100.0f);
     71 
     72             drawRects(canvas, Mode.SRC_ATOP);
     73             canvas.translate(0.0f, 100.0f);
     74 
     75             drawRects(canvas, Mode.SRC);
     76 
     77             canvas.restore();
     78 
     79             canvas.translate(100.0f, 0.0f);
     80 
     81             // DST modes
     82             canvas.save();
     83 
     84             drawRects(canvas, Mode.DST_OVER);
     85             canvas.translate(0.0f, 100.0f);
     86 
     87             drawRects(canvas, Mode.DST_IN);
     88             canvas.translate(0.0f, 100.0f);
     89 
     90             drawRects(canvas, Mode.DST_OUT);
     91             canvas.translate(0.0f, 100.0f);
     92 
     93             drawRects(canvas, Mode.DST_ATOP);
     94             canvas.translate(0.0f, 100.0f);
     95 
     96             drawRects(canvas, Mode.DST);
     97 
     98             canvas.restore();
     99 
    100             canvas.translate(100.0f, 0.0f);
    101 
    102             // Other modes
    103             canvas.save();
    104 
    105             drawRects(canvas, Mode.CLEAR);
    106             canvas.translate(0.0f, 100.0f);
    107 
    108             drawRects(canvas, Mode.XOR);
    109 
    110             canvas.translate(0.0f, 100.0f);
    111 
    112             mBluePaint.setAlpha(127);
    113             canvas.drawRect(0.0f, 0.0f, 50.0f, 50.0f, mBluePaint);
    114 
    115             canvas.translate(0.0f, 100.0f);
    116 
    117             mBluePaint.setAlpha(10);
    118             mBluePaint.setColor(0x7f0000ff);
    119             canvas.drawRect(0.0f, 0.0f, 50.0f, 50.0f, mBluePaint);
    120 
    121             mBluePaint.setColor(0xff0000ff);
    122             mBluePaint.setAlpha(255);
    123 
    124             canvas.restore();
    125         }
    126 
    127         private void drawRects(Canvas canvas, PorterDuff.Mode mode) {
    128             canvas.drawRect(0.0f, 0.0f, 50.0f, 50.0f, mBluePaint);
    129 
    130             canvas.save();
    131             canvas.translate(25.0f, 25.0f);
    132             mRedPaint.setXfermode(new PorterDuffXfermode(mode));
    133             canvas.drawRect(0.0f, 0.0f, 50.0f, 50.0f, mRedPaint);
    134             canvas.restore();
    135         }
    136     }
    137 }
    138