1 /*
2  * Copyright (C) 2011 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.gallery3d.gadget;
18 
19 import android.content.Context;
20 import android.content.res.Resources;
21 import android.graphics.Bitmap;
22 import android.graphics.Bitmap.Config;
23 import android.graphics.Canvas;
24 import android.graphics.Paint;
25 import android.util.Log;
26 
27 import com.android.gallery3d.R;
28 import com.android.gallery3d.data.MediaItem;
29 import com.android.gallery3d.util.ThreadPool;
30 
31 public class WidgetUtils {
32 
33     private static final String TAG = "WidgetUtils";
34 
35     private static int sStackPhotoWidth = 220;
36     private static int sStackPhotoHeight = 170;
37 
WidgetUtils()38     private WidgetUtils() {
39     }
40 
initialize(Context context)41     public static void initialize(Context context) {
42         Resources r = context.getResources();
43         sStackPhotoWidth = r.getDimensionPixelSize(R.dimen.stack_photo_width);
44         sStackPhotoHeight = r.getDimensionPixelSize(R.dimen.stack_photo_height);
45     }
46 
createWidgetBitmap(MediaItem image)47     public static Bitmap createWidgetBitmap(MediaItem image) {
48         Bitmap bitmap = image.requestImage(MediaItem.TYPE_THUMBNAIL)
49                .run(ThreadPool.JOB_CONTEXT_STUB);
50         if (bitmap == null) {
51             Log.w(TAG, "fail to get image of " + image.toString());
52             return null;
53         }
54         return createWidgetBitmap(bitmap, image.getRotation());
55     }
56 
createWidgetBitmap(Bitmap bitmap, int rotation)57     public static Bitmap createWidgetBitmap(Bitmap bitmap, int rotation) {
58         int w = bitmap.getWidth();
59         int h = bitmap.getHeight();
60 
61         float scale;
62         if (((rotation / 90) & 1) == 0) {
63             scale = Math.max((float) sStackPhotoWidth / w,
64                     (float) sStackPhotoHeight / h);
65         } else {
66             scale = Math.max((float) sStackPhotoWidth / h,
67                     (float) sStackPhotoHeight / w);
68         }
69 
70         Bitmap target = Bitmap.createBitmap(
71                 sStackPhotoWidth, sStackPhotoHeight, Config.ARGB_8888);
72         Canvas canvas = new Canvas(target);
73         canvas.translate(sStackPhotoWidth / 2, sStackPhotoHeight / 2);
74         canvas.rotate(rotation);
75         canvas.scale(scale, scale);
76         Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.DITHER_FLAG);
77         canvas.drawBitmap(bitmap, -w / 2, -h / 2, paint);
78         return target;
79     }
80 }
81