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 com.android.gallery3d.ui; 18 19 import com.android.gallery3d.common.BitmapUtils; 20 21 import android.graphics.Bitmap; 22 import android.graphics.Canvas; 23 import android.graphics.Bitmap.Config; 24 25 import java.util.ArrayList; 26 27 public class BitmapTileProvider implements TileImageView.Model { 28 private final Bitmap mBackup; 29 private final Bitmap[] mMipmaps; 30 private final Config mConfig; 31 private final int mImageWidth; 32 private final int mImageHeight; 33 34 private boolean mRecycled = false; 35 36 public BitmapTileProvider(Bitmap bitmap, int maxBackupSize) { 37 mImageWidth = bitmap.getWidth(); 38 mImageHeight = bitmap.getHeight(); 39 ArrayList<Bitmap> list = new ArrayList<Bitmap>(); 40 list.add(bitmap); 41 while (bitmap.getWidth() > maxBackupSize 42 || bitmap.getHeight() > maxBackupSize) { 43 bitmap = BitmapUtils.resizeBitmapByScale(bitmap, 0.5f, false); 44 list.add(bitmap); 45 } 46 47 mBackup = list.remove(list.size() - 1); 48 mMipmaps = list.toArray(new Bitmap[list.size()]); 49 mConfig = Config.ARGB_8888; 50 } 51 52 public Bitmap getBackupImage() { 53 return mBackup; 54 } 55 56 public int getImageHeight() { 57 return mImageHeight; 58 } 59 60 public int getImageWidth() { 61 return mImageWidth; 62 } 63 64 public int getLevelCount() { 65 return mMipmaps.length; 66 } 67 68 public Bitmap getTile(int level, int x, int y, int tileSize) { 69 Bitmap result = Bitmap.createBitmap(tileSize, tileSize, mConfig); 70 Canvas canvas = new Canvas(result); 71 canvas.drawBitmap(mMipmaps[level], -(x >> level), -(y >> level), null); 72 return result; 73 } 74 75 public void recycle() { 76 if (mRecycled) return; 77 mRecycled = true; 78 for (Bitmap bitmap : mMipmaps) { 79 BitmapUtils.recycleSilently(bitmap); 80 } 81 BitmapUtils.recycleSilently(mBackup); 82 } 83 84 public int getRotation() { 85 return 0; 86 } 87 88 public boolean isFailedToLoad() { 89 return false; 90 } 91 } 92
