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 android.graphics; 18 19 import com.android.annotations.Nullable; 20 import com.android.layoutlib.bridge.Bridge; 21 import com.android.layoutlib.bridge.impl.DelegateManager; 22 import com.android.ninepatch.NinePatchChunk; 23 import com.android.resources.Density; 24 import com.android.tools.layoutlib.annotations.LayoutlibDelegate; 25 26 import android.content.res.BridgeResources.NinePatchInputStream; 27 import android.graphics.BitmapFactory.Options; 28 import android.graphics.Bitmap_Delegate.BitmapCreateFlags; 29 30 import java.io.FileDescriptor; 31 import java.io.IOException; 32 import java.io.InputStream; 33 import java.util.EnumSet; 34 import java.util.Set; 35 36 /** 37 * Delegate implementing the native methods of android.graphics.BitmapFactory 38 * 39 * Through the layoutlib_create tool, the original native methods of BitmapFactory have been 40 * replaced 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 /*package*/ class BitmapFactory_Delegate { 47 48 // ------ Native Delegates ------ 49 50 @LayoutlibDelegate 51 /*package*/ static Bitmap nativeDecodeStream(InputStream is, byte[] storage, 52 @Nullable Rect padding, @Nullable Options opts) { 53 Bitmap bm = null; 54 55 Density density = Density.MEDIUM; 56 Set<BitmapCreateFlags> bitmapCreateFlags = EnumSet.of(BitmapCreateFlags.MUTABLE); 57 if (opts != null) { 58 density = Density.getEnum(opts.inDensity); 59 if (opts.inPremultiplied) { 60 bitmapCreateFlags.add(BitmapCreateFlags.PREMULTIPLIED); 61 } 62 } 63 64 try { 65 if (is instanceof NinePatchInputStream) { 66 NinePatchInputStream npis = (NinePatchInputStream) is; 67 npis.disableFakeMarkSupport(); 68 69 // load the bitmap as a nine patch 70 com.android.ninepatch.NinePatch ninePatch = com.android.ninepatch.NinePatch.load( 71 npis, true /*is9Patch*/, false /*convert*/); 72 73 // get the bitmap and chunk objects. 74 bm = Bitmap_Delegate.createBitmap(ninePatch.getImage(), bitmapCreateFlags, 75 density); 76 NinePatchChunk chunk = ninePatch.getChunk(); 77 78 // put the chunk in the bitmap 79 bm.setNinePatchChunk(NinePatch_Delegate.serialize(chunk)); 80 81 if (padding != null) { 82 // read the padding 83 int[] paddingArray = chunk.getPadding(); 84 padding.left = paddingArray[0]; 85 padding.top = paddingArray[1]; 86 padding.right = paddingArray[2]; 87 padding.bottom = paddingArray[3]; 88 } 89 } else { 90 // load the bitmap directly. 91 bm = Bitmap_Delegate.createBitmap(is, bitmapCreateFlags, density); 92 } 93 } catch (IOException e) { 94 Bridge.getLog().error(null, "Failed to load image", e, null); 95 } 96 97 return bm; 98 } 99 100 @LayoutlibDelegate 101 /*package*/ static Bitmap nativeDecodeFileDescriptor(FileDescriptor fd, 102 Rect padding, Options opts) { 103 opts.inBitmap = null; 104 return null; 105 } 106 107 @LayoutlibDelegate 108 /*package*/ static Bitmap nativeDecodeAsset(long asset, Rect padding, Options opts) { 109 opts.inBitmap = null; 110 return null; 111 } 112 113 @LayoutlibDelegate 114 /*package*/ static Bitmap nativeDecodeByteArray(byte[] data, int offset, 115 int length, Options opts) { 116 opts.inBitmap = null; 117 return null; 118 } 119 120 @LayoutlibDelegate 121 /*package*/ static boolean nativeIsSeekable(FileDescriptor fd) { 122 return true; 123 } 124 } 125