1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/*
* 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 android.graphics;
import com.android.ide.common.rendering.api.LayoutLog;
import com.android.layoutlib.bridge.Bridge;
import com.android.layoutlib.bridge.impl.DelegateManager;
import com.android.layoutlib.bridge.impl.GcSnapshot;
import com.android.ninepatch.NinePatchChunk;
import android.graphics.drawable.NinePatchDrawable;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.ref.SoftReference;
import java.util.HashMap;
import java.util.Map;
/**
* Delegate implementing the native methods of android.graphics.NinePatch
*
* Through the layoutlib_create tool, the original native methods of NinePatch have been replaced
* by calls to methods of the same name in this delegate class.
*
* Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager}
* around to map int to instance of the delegate.
*
*/
public final class NinePatch_Delegate {
/**
* Cache map for {@link NinePatchChunk}.
* When the chunks are created they are serialized into a byte[], and both are put
* in the cache, using a {@link SoftReference} for the chunk. The default Java classes
* for {@link NinePatch} and {@link NinePatchDrawable} only reference to the byte[] data, and
* provide this for drawing.
* Using the cache map allows us to not have to deserialize the byte[] back into a
* {@link NinePatchChunk} every time a rendering is done.
*/
private final static Map<byte[], SoftReference<NinePatchChunk>> sChunkCache =
new HashMap<byte[], SoftReference<NinePatchChunk>>();
// ---- Public Helper methods ----
/**
* Serializes the given chunk.
*
* @return the serialized data for the chunk.
*/
public static byte[] serialize(NinePatchChunk chunk) {
// serialize the chunk to get a byte[]
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = null;
try {
oos = new ObjectOutputStream(baos);
oos.writeObject(chunk);
} catch (IOException e) {
Bridge.getLog().error(null, "Failed to serialize NinePatchChunk.", e, null /*data*/);
return null;
} finally {
if (oos != null) {
try {
oos.close();
} catch (IOException e) {
}
}
}
// get the array and add it to the cache
byte[] array = baos.toByteArray();
sChunkCache.put(array, new SoftReference<NinePatchChunk>(chunk));
return array;
}
// ---- native methods ----
/*package*/ static boolean isNinePatchChunk(byte[] chunk) {
NinePatchChunk chunkObject = getChunk(chunk);
if (chunkObject != null) {
return true;
}
return false;
}
/*package*/ static void validateNinePatchChunk(int bitmap, byte[] chunk) {
// the default JNI implementation only checks that the byte[] has the same
// size as the C struct it represent. Since we cannot do the same check (serialization
// will return different size depending on content), we do nothing.
}
/*package*/ static void nativeDraw(int canvas_instance, RectF loc, int bitmap_instance,
byte[] c, int paint_instance_or_null, int destDensity, int srcDensity) {
draw(canvas_instance,
(int) loc.left, (int) loc.top, (int) loc.width(), (int) loc.height(),
bitmap_instance, c, paint_instance_or_null,
destDensity, srcDensity);
}
/*package*/ static void nativeDraw(int canvas_instance, Rect loc, int bitmap_instance,
byte[] c, int paint_instance_or_null, int destDensity, int srcDensity) {
draw(canvas_instance,
loc.left, loc.top, loc.width(), loc.height(),
bitmap_instance, c, paint_instance_or_null,
destDensity, srcDensity);
}
private static void draw(int canvas_instance,
final int left, final int top, final int right, final int bottom,
int bitmap_instance, byte[] c, int paint_instance_or_null,
final int destDensity, final int srcDensity) {
// get the delegate from the native int.
final Bitmap_Delegate bitmap_delegate = Bitmap_Delegate.getDelegate(bitmap_instance);
if (bitmap_delegate == null) {
return;
}
if (c == null) {
// not a 9-patch?
BufferedImage image = bitmap_delegate.getImage();
Canvas_Delegate.native_drawBitmap(canvas_instance, bitmap_instance,
new Rect(0, 0, image.getWidth(), image.getHeight()),
new Rect(left, top, right, bottom),
paint_instance_or_null, destDensity, srcDensity);
return;
}
final NinePatchChunk chunkObject = getChunk(c);
assert chunkObject != null;
if (chunkObject == null) {
return;
}
Canvas_Delegate canvas_delegate = Canvas_Delegate.getDelegate(canvas_instance);
if (canvas_delegate == null) {
return;
}
// this one can be null
Paint_Delegate paint_delegate = Paint_Delegate.getDelegate(paint_instance_or_null);
canvas_delegate.getSnapshot().draw(new GcSnapshot.Drawable() {
public void draw(Graphics2D graphics, Paint_Delegate paint) {
chunkObject.draw(bitmap_delegate.getImage(), graphics,
left, top, right - left, bottom - top, destDensity, srcDensity);
}
}, paint_delegate, true /*compositeOnly*/, false /*forceSrcMode*/);
}
/*package*/ static int nativeGetTransparentRegion(int bitmap, byte[] chunk, Rect location) {
return 0;
}
// ---- Private Helper methods ----
/**
* Returns a {@link NinePatchChunk} object for the given serialized representation.
*
* If the chunk is present in the cache then the object from the cache is returned, otherwise
* the array is deserialized into a {@link NinePatchChunk} object.
*
* @param array the serialized representation of the chunk.
* @return the NinePatchChunk or null if deserialization failed.
*/
private static NinePatchChunk getChunk(byte[] array) {
SoftReference<NinePatchChunk> chunkRef = sChunkCache.get(array);
NinePatchChunk chunk = chunkRef.get();
if (chunk == null) {
ByteArrayInputStream bais = new ByteArrayInputStream(array);
ObjectInputStream ois = null;
try {
ois = new ObjectInputStream(bais);
chunk = (NinePatchChunk) ois.readObject();
// put back the chunk in the cache
if (chunk != null) {
sChunkCache.put(array, new SoftReference<NinePatchChunk>(chunk));
}
} catch (IOException e) {
Bridge.getLog().error(LayoutLog.TAG_BROKEN,
"Failed to deserialize NinePatchChunk content.", e, null /*data*/);
return null;
} catch (ClassNotFoundException e) {
Bridge.getLog().error(LayoutLog.TAG_BROKEN,
"Failed to deserialize NinePatchChunk class.", e, null /*data*/);
return null;
} finally {
if (ois != null) {
try {
ois.close();
} catch (IOException e) {
}
}
}
}
return chunk;
}
}
|
