Xavier Ducrohet | e4d9787 | 2010-11-22 20:09:55 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 android.graphics; |
| 18 | |
Xavier Ducrohet | 3054fe6 | 2010-12-06 10:11:44 -0800 | [diff] [blame^] | 19 | import com.android.layoutlib.bridge.Bridge; |
Xavier Ducrohet | e4d9787 | 2010-11-22 20:09:55 -0800 | [diff] [blame] | 20 | import com.android.layoutlib.bridge.impl.DelegateManager; |
| 21 | import com.android.ninepatch.NinePatchChunk; |
| 22 | |
| 23 | import android.graphics.drawable.NinePatchDrawable; |
| 24 | |
| 25 | import java.awt.Graphics2D; |
| 26 | import java.awt.image.BufferedImage; |
| 27 | import java.io.ByteArrayInputStream; |
| 28 | import java.io.ByteArrayOutputStream; |
| 29 | import java.io.IOException; |
| 30 | import java.io.ObjectInputStream; |
| 31 | import java.io.ObjectOutputStream; |
| 32 | import java.lang.ref.SoftReference; |
| 33 | import java.util.HashMap; |
| 34 | import java.util.Map; |
| 35 | |
| 36 | /** |
| 37 | * Delegate implementing the native methods of android.graphics.NinePatch |
| 38 | * |
| 39 | * Through the layoutlib_create tool, the original native methods of NinePatch have been replaced |
| 40 | * by calls to methods of the same name in this delegate class. |
| 41 | * |
| 42 | * Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager} |
| 43 | * around to map int to instance of the delegate. |
| 44 | * |
| 45 | */ |
| 46 | public class NinePatch_Delegate { |
| 47 | |
| 48 | /** |
| 49 | * Cache map for {@link NinePatchChunk}. |
| 50 | * When the chunks are created they are serialized into a byte[], and both are put |
| 51 | * in the cache, using a {@link SoftReference} for the chunk. The default Java classes |
| 52 | * for {@link NinePatch} and {@link NinePatchDrawable} only reference to the byte[] data, and |
| 53 | * provide this for drawing. |
| 54 | * Using the cache map allows us to not have to deserialize the byte[] back into a |
| 55 | * {@link NinePatchChunk} every time a rendering is done. |
| 56 | */ |
| 57 | private final static Map<byte[], SoftReference<NinePatchChunk>> sChunkCache = |
| 58 | new HashMap<byte[], SoftReference<NinePatchChunk>>(); |
| 59 | |
| 60 | // ---- Public Helper methods ---- |
| 61 | |
| 62 | /** |
| 63 | * Serializes the given chunk. |
| 64 | * |
| 65 | * @return the serialized data for the chunk. |
| 66 | */ |
| 67 | public static byte[] serialize(NinePatchChunk chunk) { |
| 68 | // serialize the chunk to get a byte[] |
| 69 | ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| 70 | ObjectOutputStream oos = null; |
| 71 | try { |
| 72 | oos = new ObjectOutputStream(baos); |
| 73 | oos.writeObject(chunk); |
| 74 | } catch (IOException e) { |
Xavier Ducrohet | 3054fe6 | 2010-12-06 10:11:44 -0800 | [diff] [blame^] | 75 | Bridge.getLog().error("Failed to serialize NinePatchChunk.", e); |
Xavier Ducrohet | e4d9787 | 2010-11-22 20:09:55 -0800 | [diff] [blame] | 76 | return null; |
| 77 | } finally { |
| 78 | if (oos != null) { |
| 79 | try { |
| 80 | oos.close(); |
| 81 | } catch (IOException e) { |
| 82 | } |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | // get the array and add it to the cache |
| 87 | byte[] array = baos.toByteArray(); |
| 88 | sChunkCache.put(array, new SoftReference<NinePatchChunk>(chunk)); |
| 89 | return array; |
| 90 | } |
| 91 | |
| 92 | // ---- native methods ---- |
| 93 | |
| 94 | /*package*/ static boolean isNinePatchChunk(byte[] chunk) { |
| 95 | NinePatchChunk chunkObject = getChunk(chunk); |
| 96 | if (chunkObject != null) { |
| 97 | return true; |
| 98 | } |
| 99 | |
| 100 | return false; |
| 101 | } |
| 102 | |
| 103 | /*package*/ static void validateNinePatchChunk(int bitmap, byte[] chunk) { |
| 104 | // the default JNI implementation only checks that the byte[] has the same |
| 105 | // size as the C struct it represent. Since we cannot do the same check (serialization |
| 106 | // will return different size depending on content), we do nothing. |
| 107 | } |
| 108 | |
| 109 | /*package*/ static void nativeDraw(int canvas_instance, RectF loc, int bitmap_instance, |
| 110 | byte[] c, int paint_instance_or_null, int destDensity, int srcDensity) { |
| 111 | draw(canvas_instance, |
| 112 | (int) loc.left, (int) loc.top, (int) loc.width(), (int) loc.height(), |
| 113 | bitmap_instance, c, paint_instance_or_null, |
| 114 | destDensity, srcDensity); |
| 115 | } |
| 116 | |
| 117 | /*package*/ static void nativeDraw(int canvas_instance, Rect loc, int bitmap_instance, |
| 118 | byte[] c, int paint_instance_or_null, int destDensity, int srcDensity) { |
| 119 | draw(canvas_instance, |
| 120 | loc.left, loc.top, loc.width(), loc.height(), |
| 121 | bitmap_instance, c, paint_instance_or_null, |
| 122 | destDensity, srcDensity); |
| 123 | } |
| 124 | |
| 125 | private static void draw(int canvas_instance, |
| 126 | int left, int top, int right, int bottom, |
| 127 | int bitmap_instance, byte[] c, int paint_instance_or_null, |
| 128 | int destDensity, int srcDensity) { |
| 129 | // get the delegate from the native int. |
| 130 | Bitmap_Delegate bitmap_delegate = Bitmap_Delegate.getDelegate(bitmap_instance); |
| 131 | if (bitmap_delegate == null) { |
| 132 | assert false; |
| 133 | return; |
| 134 | } |
| 135 | |
| 136 | if (c == null) { |
| 137 | // not a 9-patch? |
| 138 | BufferedImage image = bitmap_delegate.getImage(); |
| 139 | Canvas_Delegate.native_drawBitmap(canvas_instance, bitmap_instance, |
| 140 | new Rect(0, 0, image.getWidth(), image.getHeight()), |
| 141 | new Rect(left, top, right, bottom), |
| 142 | paint_instance_or_null, destDensity, srcDensity); |
| 143 | return; |
| 144 | } |
| 145 | |
| 146 | NinePatchChunk chunkObject = getChunk(c); |
| 147 | assert chunkObject != null; |
| 148 | if (chunkObject == null) { |
| 149 | return; |
| 150 | } |
| 151 | |
| 152 | Canvas_Delegate canvas_delegate = Canvas_Delegate.getDelegate(canvas_instance); |
| 153 | if (canvas_delegate == null) { |
| 154 | assert false; |
| 155 | return; |
| 156 | } |
| 157 | |
| 158 | // this one can be null |
| 159 | Paint_Delegate paint_delegate = Paint_Delegate.getDelegate(paint_instance_or_null); |
| 160 | |
| 161 | Graphics2D graphics; |
| 162 | if (paint_delegate != null) { |
| 163 | graphics = canvas_delegate.getCustomGraphics(paint_delegate); |
| 164 | } else { |
| 165 | graphics = canvas_delegate.getGraphics2d(); |
| 166 | } |
| 167 | |
| 168 | try { |
| 169 | chunkObject.draw(bitmap_delegate.getImage(), graphics, |
| 170 | left, top, right - left, bottom - top); |
| 171 | } finally { |
| 172 | if (paint_delegate != null) { |
| 173 | graphics.dispose(); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | } |
| 178 | |
| 179 | /*package*/ static int nativeGetTransparentRegion(int bitmap, byte[] chunk, Rect location) { |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | // ---- Private Helper methods ---- |
| 184 | |
| 185 | /** |
| 186 | * Returns a {@link NinePatchChunk} object for the given serialized representation. |
| 187 | * |
| 188 | * If the chunk is present in the cache then the object from the cache is returned, otherwise |
| 189 | * the array is deserialized into a {@link NinePatchChunk} object. |
| 190 | * |
| 191 | * @param array the serialized representation of the chunk. |
| 192 | * @return the NinePatchChunk or null if deserialization failed. |
| 193 | */ |
| 194 | private static NinePatchChunk getChunk(byte[] array) { |
| 195 | SoftReference<NinePatchChunk> chunkRef = sChunkCache.get(array); |
| 196 | NinePatchChunk chunk = chunkRef.get(); |
| 197 | if (chunk == null) { |
| 198 | ByteArrayInputStream bais = new ByteArrayInputStream(array); |
| 199 | ObjectInputStream ois = null; |
| 200 | try { |
| 201 | ois = new ObjectInputStream(bais); |
| 202 | chunk = (NinePatchChunk) ois.readObject(); |
| 203 | |
| 204 | // put back the chunk in the cache |
| 205 | if (chunk != null) { |
| 206 | sChunkCache.put(array, new SoftReference<NinePatchChunk>(chunk)); |
| 207 | } |
| 208 | } catch (IOException e) { |
Xavier Ducrohet | 3054fe6 | 2010-12-06 10:11:44 -0800 | [diff] [blame^] | 209 | Bridge.getLog().error("Failed to deserialize NinePatchChunk content.", e); |
Xavier Ducrohet | e4d9787 | 2010-11-22 20:09:55 -0800 | [diff] [blame] | 210 | return null; |
| 211 | } catch (ClassNotFoundException e) { |
Xavier Ducrohet | 3054fe6 | 2010-12-06 10:11:44 -0800 | [diff] [blame^] | 212 | Bridge.getLog().error("Failed to deserialize NinePatchChunk class.", e); |
Xavier Ducrohet | e4d9787 | 2010-11-22 20:09:55 -0800 | [diff] [blame] | 213 | return null; |
| 214 | } finally { |
| 215 | if (ois != null) { |
| 216 | try { |
| 217 | ois.close(); |
| 218 | } catch (IOException e) { |
| 219 | } |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | return chunk; |
| 225 | } |
| 226 | } |