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
17package android.graphics;
18
19import com.android.layoutlib.bridge.Bridge;
20import com.android.layoutlib.bridge.impl.DelegateManager;
21import com.android.ninepatch.NinePatchChunk;
22import com.android.resources.Density;
23import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
24
25import android.content.res.BridgeResources.NinePatchInputStream;
26import android.graphics.BitmapFactory.Options;
27import android.graphics.Bitmap_Delegate.BitmapCreateFlags;
28
29import java.io.FileDescriptor;
30import java.io.IOException;
31import java.io.InputStream;
32import java.util.EnumSet;
33import java.util.Set;
34
35/**
36 * Delegate implementing the native methods of android.graphics.BitmapFactory
37 *
38 * Through the layoutlib_create tool, the original native methods of BitmapFactory have been
39 * replaced by calls to methods of the same name in this delegate class.
40 *
41 * Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager}
42 * around to map int to instance of the delegate.
43 *
44 */
45/*package*/ class BitmapFactory_Delegate {
46
47    // ------ Native Delegates ------
48
49    @LayoutlibDelegate
50    /*package*/ static Bitmap nativeDecodeStream(InputStream is, byte[] storage,
51            Rect padding, Options opts) {
52        Bitmap bm = null;
53
54        Density density = Density.MEDIUM;
55        Set<BitmapCreateFlags> bitmapCreateFlags = EnumSet.of(BitmapCreateFlags.MUTABLE);
56        if (opts != null) {
57            density = Density.getEnum(opts.inDensity);
58            if (opts.inPremultiplied) {
59                bitmapCreateFlags.add(BitmapCreateFlags.PREMULTIPLIED);
60            }
61        }
62
63        try {
64            if (is instanceof NinePatchInputStream) {
65                NinePatchInputStream npis = (NinePatchInputStream) is;
66                npis.disableFakeMarkSupport();
67
68                // load the bitmap as a nine patch
69                com.android.ninepatch.NinePatch ninePatch = com.android.ninepatch.NinePatch.load(
70                        npis, true /*is9Patch*/, false /*convert*/);
71
72                // get the bitmap and chunk objects.
73                bm = Bitmap_Delegate.createBitmap(ninePatch.getImage(), bitmapCreateFlags,
74                        density);
75                NinePatchChunk chunk = ninePatch.getChunk();
76
77                // put the chunk in the bitmap
78                bm.setNinePatchChunk(NinePatch_Delegate.serialize(chunk));
79
80                // read the padding
81                int[] paddingarray = chunk.getPadding();
82                padding.left = paddingarray[0];
83                padding.top = paddingarray[1];
84                padding.right = paddingarray[2];
85                padding.bottom = paddingarray[3];
86            } else {
87                // load the bitmap directly.
88                bm = Bitmap_Delegate.createBitmap(is, bitmapCreateFlags, density);
89            }
90        } catch (IOException e) {
91            Bridge.getLog().error(null,"Failed to load image" , e, null);
92        }
93
94        return bm;
95    }
96
97    @LayoutlibDelegate
98    /*package*/ static Bitmap nativeDecodeFileDescriptor(FileDescriptor fd,
99            Rect padding, Options opts) {
100        opts.inBitmap = null;
101        return null;
102    }
103
104    @LayoutlibDelegate
105    /*package*/ static Bitmap nativeDecodeAsset(int asset, Rect padding, Options opts) {
106        opts.inBitmap = null;
107        return null;
108    }
109
110    @LayoutlibDelegate
111    /*package*/ static Bitmap nativeDecodeByteArray(byte[] data, int offset,
112            int length, Options opts) {
113        opts.inBitmap = null;
114        return null;
115    }
116
117    @LayoutlibDelegate
118    /*package*/ static boolean nativeIsSeekable(FileDescriptor fd) {
119        return true;
120    }
121}
122