FastBitmapDrawable.java revision 45e1d6ec0a213a444d01466c3d4f1ded5508ed63 
1/*
2 * Copyright (C) 2008 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.launcher2;
18
19import android.graphics.Bitmap;
20import android.graphics.Canvas;
21import android.graphics.ColorFilter;
22import android.graphics.Paint;
23import android.graphics.PixelFormat;
24import android.graphics.Rect;
25import android.graphics.drawable.Drawable;
26
27class FastBitmapDrawable extends Drawable {
28    private Bitmap mBitmap;
29    private int mWidth;
30    private int mHeight;
31    private final Paint mPaint = new Paint();
32
33    FastBitmapDrawable(Bitmap b) {
34        mBitmap = b;
35        if (b != null) {
36            mWidth = mBitmap.getWidth();
37            mHeight = mBitmap.getHeight();
38        } else {
39            mWidth = mHeight = 0;
40        }
41    }
42
43    @Override
44    public void draw(Canvas canvas) {
45        final Rect r = getBounds();
46        canvas.drawBitmap(mBitmap, r.left, r.top, mPaint);
47    }
48
49    @Override
50    public int getOpacity() {
51        return PixelFormat.TRANSLUCENT;
52    }
53
54    @Override
55    public void setAlpha(int alpha) {
56        mPaint.setAlpha(alpha);
57    }
58
59    @Override
60    public void setColorFilter(ColorFilter cf) {
61    }
62
63    @Override
64    public int getIntrinsicWidth() {
65        return mWidth;
66    }
67
68    @Override
69    public int getIntrinsicHeight() {
70        return mHeight;
71    }
72
73    @Override
74    public int getMinimumWidth() {
75        return mWidth;
76    }
77
78    @Override
79    public int getMinimumHeight() {
80        return mHeight;
81    }
82
83    public void setBitmap(Bitmap b) {
84        mBitmap = b;
85        if (b != null) {
86            mWidth = mBitmap.getWidth();
87            mHeight = mBitmap.getHeight();
88        } else {
89            mWidth = mHeight = 0;
90        }
91    }
92
93    public Bitmap getBitmap() {
94        return mBitmap;
95    }
96}
97