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; 27 28import java.io.FileDescriptor; 29import java.io.IOException; 30import java.io.InputStream; 31 32/** 33 * Delegate implementing the native methods of android.graphics.BitmapFactory 34 * 35 * Through the layoutlib_create tool, the original native methods of BitmapFactory have been 36 * replaced by calls to methods of the same name in this delegate class. 37 * 38 * Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager} 39 * around to map int to instance of the delegate. 40 * 41 */ 42/*package*/ class BitmapFactory_Delegate { 43 44 // ------ Java delegates ------ 45 46 @LayoutlibDelegate 47 /*package*/ static Bitmap finishDecode(Bitmap bm, Rect outPadding, Options opts) { 48 if (bm == null || opts == null) { 49 return bm; 50 } 51 52 final int density = opts.inDensity; 53 if (density == 0) { 54 return bm; 55 } 56 57 bm.setDensity(density); 58 final int targetDensity = opts.inTargetDensity; 59 if (targetDensity == 0 || density == targetDensity || density == opts.inScreenDensity) { 60 return bm; 61 } 62 63 byte[] np = bm.getNinePatchChunk(); 64 final boolean isNinePatch = np != null && NinePatch.isNinePatchChunk(np); 65 // DELEGATE CHANGE: never scale 9-patch 66 if (opts.inScaled && isNinePatch == false) { 67 float scale = targetDensity / (float)density; 68 // TODO: This is very inefficient and should be done in native by Skia 69 final Bitmap oldBitmap = bm; 70 bm = Bitmap.createScaledBitmap(oldBitmap, (int) (bm.getWidth() * scale + 0.5f), 71 (int) (bm.getHeight() * scale + 0.5f), true); 72 oldBitmap.recycle(); 73 74 if (isNinePatch) { 75 np = nativeScaleNinePatch(np, scale, outPadding); 76 bm.setNinePatchChunk(np); 77 } 78 bm.setDensity(targetDensity); 79 } 80 81 return bm; 82 } 83 84 85 // ------ Native Delegates ------ 86 87 @LayoutlibDelegate 88 /*package*/ static Bitmap nativeDecodeStream(InputStream is, byte[] storage, 89 Rect padding, Options opts) { 90 return nativeDecodeStream(is, storage, padding, opts, false, 1.f); 91 } 92 93 @LayoutlibDelegate 94 /*package*/ static Bitmap nativeDecodeStream(InputStream is, byte[] storage, 95 Rect padding, Options opts, boolean applyScale, float scale) { 96 Bitmap bm = null; 97 98 //TODO support rescaling 99 100 Density density = Density.MEDIUM; 101 if (opts != null) { 102 density = Density.getEnum(opts.inDensity); 103 } 104 105 try { 106 if (is instanceof NinePatchInputStream) { 107 NinePatchInputStream npis = (NinePatchInputStream) is; 108 npis.disableFakeMarkSupport(); 109 110 // load the bitmap as a nine patch 111 com.android.ninepatch.NinePatch ninePatch = com.android.ninepatch.NinePatch.load( 112 npis, true /*is9Patch*/, false /*convert*/); 113 114 // get the bitmap and chunk objects. 115 bm = Bitmap_Delegate.createBitmap(ninePatch.getImage(), true /*isMutable*/, 116 density); 117 NinePatchChunk chunk = ninePatch.getChunk(); 118 119 // put the chunk in the bitmap 120 bm.setNinePatchChunk(NinePatch_Delegate.serialize(chunk)); 121 122 // read the padding 123 int[] paddingarray = chunk.getPadding(); 124 padding.left = paddingarray[0]; 125 padding.top = paddingarray[1]; 126 padding.right = paddingarray[2]; 127 padding.bottom = paddingarray[3]; 128 } else { 129 // load the bitmap directly. 130 bm = Bitmap_Delegate.createBitmap(is, true, density); 131 } 132 } catch (IOException e) { 133 Bridge.getLog().error(null,"Failed to load image" , e, null); 134 } 135 136 return bm; 137 } 138 139 @LayoutlibDelegate 140 /*package*/ static Bitmap nativeDecodeFileDescriptor(FileDescriptor fd, 141 Rect padding, Options opts) { 142 opts.inBitmap = null; 143 return null; 144 } 145 146 @LayoutlibDelegate 147 /*package*/ static Bitmap nativeDecodeAsset(int asset, Rect padding, Options opts) { 148 opts.inBitmap = null; 149 return null; 150 } 151 152 @LayoutlibDelegate 153 /*package*/ static Bitmap nativeDecodeAsset(int asset, Rect padding, Options opts, 154 boolean applyScale, float scale) { 155 opts.inBitmap = null; 156 return null; 157 } 158 159 @LayoutlibDelegate 160 /*package*/ static Bitmap nativeDecodeByteArray(byte[] data, int offset, 161 int length, Options opts) { 162 opts.inBitmap = null; 163 return null; 164 } 165 166 @LayoutlibDelegate 167 /*package*/ static byte[] nativeScaleNinePatch(byte[] chunk, float scale, Rect pad) { 168 // don't scale for now. This should not be called anyway since we re-implement 169 // BitmapFactory.finishDecode(); 170 return chunk; 171 } 172 173 @LayoutlibDelegate 174 /*package*/ static boolean nativeIsSeekable(FileDescriptor fd) { 175 return true; 176 } 177} 178