1/*
2 * Copyright (C) 2014 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.launcher3;
18
19import android.content.Context;
20import android.graphics.Bitmap;
21import android.graphics.Canvas;
22import android.graphics.Paint;
23import android.view.View;
24
25public class FastBitmapView extends View {
26
27    private final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
28    private Bitmap mBitmap;
29
30    public FastBitmapView(Context context) {
31        super(context);
32    }
33
34    /**
35     * Applies the new bitmap.
36     * @return true if the view was invalidated.
37     */
38    public boolean setBitmap(Bitmap b) {
39        if (b != mBitmap){
40            if (mBitmap != null) {
41                invalidate(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
42            }
43            mBitmap = b;
44            if (mBitmap != null) {
45                invalidate(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
46            }
47            return true;
48        }
49        return false;
50    }
51
52    @Override
53    protected void onDraw(Canvas canvas) {
54        if (mBitmap != null) {
55            canvas.drawBitmap(mBitmap, 0, 0, mPaint);
56        }
57    }
58}
59