Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +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 com.android.gallery3d.photoeditor; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.database.Cursor; |
| 21 | import android.graphics.Bitmap; |
| 22 | import android.graphics.Bitmap.CompressFormat; |
| 23 | import android.graphics.BitmapFactory; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 24 | import android.graphics.Matrix; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 25 | import android.graphics.Rect; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 26 | import android.net.Uri; |
| 27 | import android.provider.MediaStore.Images.ImageColumns; |
| 28 | import android.util.Log; |
| 29 | |
| 30 | import java.io.Closeable; |
| 31 | import java.io.File; |
| 32 | import java.io.FileNotFoundException; |
| 33 | import java.io.FileOutputStream; |
| 34 | import java.io.IOException; |
| 35 | import java.io.InputStream; |
| 36 | import java.io.OutputStream; |
| 37 | |
| 38 | /** |
| 39 | * Utils for bitmap operations. |
| 40 | */ |
| 41 | public class BitmapUtils { |
| 42 | |
| 43 | private static final String TAG = "BitmapUtils"; |
| 44 | private static final int DEFAULT_COMPRESS_QUALITY = 90; |
| 45 | private static final int INDEX_ORIENTATION = 0; |
| 46 | |
| 47 | private static final String[] IMAGE_PROJECTION = new String[] { |
| 48 | ImageColumns.ORIENTATION |
| 49 | }; |
| 50 | |
| 51 | private final Context context; |
| 52 | |
| 53 | public BitmapUtils(Context context) { |
| 54 | this.context = context; |
| 55 | } |
| 56 | |
Yuli Huang | 1d9a19d | 2011-12-02 17:35:34 +0800 | [diff] [blame] | 57 | private static Bitmap createBitmap(Bitmap source, Matrix m) { |
| 58 | return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), m, true); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | private void closeStream(Closeable stream) { |
| 62 | if (stream != null) { |
| 63 | try { |
| 64 | stream.close(); |
| 65 | } catch (IOException e) { |
| 66 | e.printStackTrace(); |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | private Rect getBitmapBounds(Uri uri) { |
| 72 | Rect bounds = new Rect(); |
| 73 | InputStream is = null; |
| 74 | |
| 75 | try { |
| 76 | is = context.getContentResolver().openInputStream(uri); |
| 77 | BitmapFactory.Options options = new BitmapFactory.Options(); |
| 78 | options.inJustDecodeBounds = true; |
| 79 | BitmapFactory.decodeStream(is, null, options); |
| 80 | |
| 81 | bounds.right = options.outWidth; |
| 82 | bounds.bottom = options.outHeight; |
| 83 | } catch (FileNotFoundException e) { |
| 84 | e.printStackTrace(); |
| 85 | } finally { |
| 86 | closeStream(is); |
| 87 | } |
| 88 | |
| 89 | return bounds; |
| 90 | } |
| 91 | |
| 92 | private int getOrientation(Uri uri) { |
| 93 | int orientation = 0; |
Yuli Huang | fef5b98 | 2011-09-28 01:21:15 +0800 | [diff] [blame] | 94 | Cursor cursor = null; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 95 | try { |
Yuli Huang | fef5b98 | 2011-09-28 01:21:15 +0800 | [diff] [blame] | 96 | cursor = context.getContentResolver().query(uri, IMAGE_PROJECTION, null, null, null); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 97 | if ((cursor != null) && cursor.moveToNext()) { |
| 98 | orientation = cursor.getInt(INDEX_ORIENTATION); |
| 99 | } |
Yuli Huang | fef5b98 | 2011-09-28 01:21:15 +0800 | [diff] [blame] | 100 | } catch (Exception e) { |
| 101 | // Ignore error for no orientation column; just use the default orientation value 0. |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 102 | } finally { |
| 103 | if (cursor != null) { |
| 104 | cursor.close(); |
| 105 | } |
| 106 | } |
| 107 | return orientation; |
| 108 | } |
| 109 | |
| 110 | /** |
Yuli Huang | 1d9a19d | 2011-12-02 17:35:34 +0800 | [diff] [blame] | 111 | * Decodes bitmap that keeps aspect-ratio and spans most within the bounds. |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 112 | */ |
| 113 | private Bitmap decodeBitmap(Uri uri, int width, int height) { |
| 114 | InputStream is = null; |
| 115 | Bitmap bitmap = null; |
| 116 | |
| 117 | try { |
| 118 | // TODO: Take max pixels allowed into account for calculation to avoid possible OOM. |
| 119 | Rect bounds = getBitmapBounds(uri); |
| 120 | int sampleSize = Math.max(bounds.width() / width, bounds.height() / height); |
| 121 | sampleSize = Math.min(sampleSize, |
| 122 | Math.max(bounds.width() / height, bounds.height() / width)); |
| 123 | |
| 124 | BitmapFactory.Options options = new BitmapFactory.Options(); |
| 125 | options.inSampleSize = Math.max(sampleSize, 1); |
| 126 | options.inPreferredConfig = Bitmap.Config.ARGB_8888; |
| 127 | |
| 128 | is = context.getContentResolver().openInputStream(uri); |
| 129 | bitmap = BitmapFactory.decodeStream(is, null, options); |
| 130 | } catch (FileNotFoundException e) { |
| 131 | Log.e(TAG, "FileNotFoundException: " + uri); |
| 132 | } finally { |
| 133 | closeStream(is); |
| 134 | } |
| 135 | |
Yuli Huang | f66bd12 | 2011-10-26 20:10:06 +0800 | [diff] [blame] | 136 | // Ensure bitmap in 8888 format, good for editing as well as GL compatible. |
| 137 | if ((bitmap != null) && (bitmap.getConfig() != Bitmap.Config.ARGB_8888)) { |
| 138 | Bitmap copy = bitmap.copy(Bitmap.Config.ARGB_8888, true); |
| 139 | bitmap.recycle(); |
| 140 | bitmap = copy; |
| 141 | } |
| 142 | |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 143 | if (bitmap != null) { |
Yuli Huang | f66bd12 | 2011-10-26 20:10:06 +0800 | [diff] [blame] | 144 | // Scale down the sampled bitmap if it's still larger than the desired dimension. |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 145 | float scale = Math.min((float) width / bitmap.getWidth(), |
| 146 | (float) height / bitmap.getHeight()); |
| 147 | scale = Math.max(scale, Math.min((float) height / bitmap.getWidth(), |
| 148 | (float) width / bitmap.getHeight())); |
| 149 | if (scale < 1) { |
| 150 | Matrix m = new Matrix(); |
| 151 | m.setScale(scale, scale); |
Yuli Huang | 1d9a19d | 2011-12-02 17:35:34 +0800 | [diff] [blame] | 152 | Bitmap transformed = createBitmap(bitmap, m); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 153 | bitmap.recycle(); |
| 154 | return transformed; |
| 155 | } |
| 156 | } |
| 157 | return bitmap; |
| 158 | } |
| 159 | |
| 160 | /** |
Yuli Huang | 1d9a19d | 2011-12-02 17:35:34 +0800 | [diff] [blame] | 161 | * Gets decoded bitmap (maybe immutable) that keeps orientation as well. |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 162 | */ |
| 163 | public Bitmap getBitmap(Uri uri, int width, int height) { |
| 164 | Bitmap bitmap = decodeBitmap(uri, width, height); |
| 165 | |
| 166 | // Rotate the decoded bitmap according to its orientation if it's necessary. |
| 167 | if (bitmap != null) { |
| 168 | int orientation = getOrientation(uri); |
| 169 | if (orientation != 0) { |
| 170 | Matrix m = new Matrix(); |
| 171 | m.setRotate(orientation); |
Yuli Huang | 1d9a19d | 2011-12-02 17:35:34 +0800 | [diff] [blame] | 172 | Bitmap transformed = createBitmap(bitmap, m); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 173 | bitmap.recycle(); |
| 174 | return transformed; |
| 175 | } |
| 176 | } |
| 177 | return bitmap; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Saves the bitmap by given directory, filename, and format; if the directory is given null, |
| 182 | * then saves it under the cache directory. |
| 183 | */ |
Yuli Huang | 0366948 | 2012-04-10 18:51:36 +0800 | [diff] [blame] | 184 | public File saveBitmap(Bitmap bitmap, File directory, String filename, CompressFormat format) { |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 185 | |
| 186 | if (directory == null) { |
Yuli Huang | 0366948 | 2012-04-10 18:51:36 +0800 | [diff] [blame] | 187 | directory = context.getCacheDir(); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 188 | } else { |
| 189 | // Check if the given directory exists or try to create it. |
Yuli Huang | 0366948 | 2012-04-10 18:51:36 +0800 | [diff] [blame] | 190 | if (!directory.isDirectory() && !directory.mkdirs()) { |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 191 | return null; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | File file = null; |
| 196 | OutputStream os = null; |
| 197 | |
| 198 | try { |
| 199 | filename = (format == CompressFormat.PNG) ? filename + ".png" : filename + ".jpg"; |
| 200 | file = new File(directory, filename); |
| 201 | os = new FileOutputStream(file); |
| 202 | bitmap.compress(format, DEFAULT_COMPRESS_QUALITY, os); |
| 203 | } catch (FileNotFoundException e) { |
| 204 | e.printStackTrace(); |
| 205 | } finally { |
| 206 | closeStream(os); |
| 207 | } |
| 208 | return file; |
| 209 | } |
| 210 | } |