| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.test.hwui; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.PorterDuff; |
| import android.graphics.PorterDuffXfermode; |
| import android.os.Bundle; |
| import android.view.View; |
| |
| @SuppressWarnings({"UnusedDeclaration"}) |
| public class LayersActivity extends Activity { |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(new LayersView(this)); |
| } |
| |
| public static class LayersView extends View { |
| private Paint mLayerPaint; |
| private final Paint mRectPaint; |
| |
| public LayersView(Context c) { |
| super(c); |
| |
| mLayerPaint = new Paint(); |
| mRectPaint = new Paint(); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| super.onDraw(canvas); |
| |
| canvas.translate(140.0f, 100.0f); |
| |
| //canvas.drawRGB(255, 255, 255); |
| |
| int count = canvas.saveLayer(0.0f, 0.0f, 200.0f, 100.0f, mLayerPaint, |
| Canvas.ALL_SAVE_FLAG); |
| |
| mRectPaint.setColor(0xffff0000); |
| canvas.drawRect(0.0f, 0.0f, 200.0f, 100.0f, mRectPaint); |
| |
| canvas.restoreToCount(count); |
| |
| canvas.translate(0.0f, 125.0f); |
| |
| count = canvas.saveLayer(0.0f, 0.0f, 200.0f, 100.0f, mLayerPaint, |
| Canvas.ALL_SAVE_FLAG); |
| |
| mRectPaint.setColor(0xff00ff00); |
| mRectPaint.setAlpha(50); |
| canvas.drawRect(0.0f, 0.0f, 200.0f, 100.0f, mRectPaint); |
| |
| canvas.restoreToCount(count); |
| |
| canvas.translate(25.0f, 125.0f); |
| |
| mRectPaint.setColor(0xff0000ff); |
| mRectPaint.setAlpha(255); |
| canvas.drawRect(0.0f, 0.0f, 100.0f, 50.0f, mRectPaint); |
| |
| mLayerPaint.setAlpha(127); |
| mLayerPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OUT)); |
| count = canvas.saveLayer(50.0f, 25.0f, 150.0f, 75.0f, mLayerPaint, |
| Canvas.ALL_SAVE_FLAG); |
| |
| mRectPaint.setColor(0xffff0000); |
| canvas.drawRect(50.0f, 25.0f, 150.0f, 75.0f, mRectPaint); |
| |
| canvas.restoreToCount(count); |
| |
| canvas.translate(0.0f, 125.0f); |
| |
| mRectPaint.setColor(0xff0000ff); |
| mRectPaint.setAlpha(255); |
| canvas.drawRect(0.0f, 0.0f, 100.0f, 50.0f, mRectPaint); |
| |
| mLayerPaint.setColor(0xffff0000); |
| mLayerPaint.setAlpha(127); |
| mLayerPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_ATOP)); |
| count = canvas.saveLayer(50.0f, 25.0f, 150.0f, 75.0f, mLayerPaint, |
| Canvas.ALL_SAVE_FLAG); |
| |
| mRectPaint.setColor(0xffff0000); |
| canvas.drawRect(50.0f, 25.0f, 150.0f, 75.0f, mRectPaint); |
| |
| canvas.restoreToCount(count); |
| |
| mLayerPaint = new Paint(); |
| } |
| } |
| } |