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.graphics.Bitmap; |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 20 | import android.os.Bundle; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 21 | |
| 22 | import com.android.gallery3d.photoeditor.filters.Filter; |
| 23 | |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 24 | import java.util.ArrayList; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 25 | import java.util.Stack; |
| 26 | |
| 27 | /** |
| 28 | * A stack of filters to be applied onto a photo. |
| 29 | */ |
| 30 | public class FilterStack { |
| 31 | |
| 32 | /** |
| 33 | * Listener of stack changes. |
| 34 | */ |
| 35 | public interface StackListener { |
| 36 | |
| 37 | void onStackChanged(boolean canUndo, boolean canRedo); |
| 38 | } |
| 39 | |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 40 | private static final String APPLIED_STACK_KEY = "applied_stack"; |
| 41 | private static final String REDO_STACK_KEY = "redo_stack"; |
| 42 | |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 43 | private final Stack<Filter> appliedStack = new Stack<Filter>(); |
| 44 | private final Stack<Filter> redoStack = new Stack<Filter>(); |
| 45 | |
| 46 | // Use two photo buffers as in and out in turns to apply filters in the stack. |
| 47 | private final Photo[] buffers = new Photo[2]; |
| 48 | private final PhotoView photoView; |
| 49 | private final StackListener stackListener; |
| 50 | |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 51 | private Photo source; |
| 52 | private Runnable queuedTopFilterChange; |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 53 | private boolean outputTopFilter; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 54 | private volatile boolean paused; |
| 55 | |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 56 | public FilterStack(PhotoView photoView, StackListener stackListener, Bundle savedState) { |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 57 | this.photoView = photoView; |
| 58 | this.stackListener = stackListener; |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 59 | if (savedState != null) { |
| 60 | appliedStack.addAll(getFilters(savedState, APPLIED_STACK_KEY)); |
| 61 | redoStack.addAll(getFilters(savedState, REDO_STACK_KEY)); |
| 62 | outputTopFilter = true; |
Yuli Huang | 90b7a7a | 2011-11-09 15:10:45 +0800 | [diff] [blame] | 63 | stackListener.onStackChanged(!appliedStack.empty(), !redoStack.empty()); |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 64 | } |
| 65 | } |
| 66 | |
| 67 | private ArrayList<Filter> getFilters(Bundle savedState, String key) { |
| 68 | // Infer Filter array-list from the Parcelable array-list by the specified returned type. |
| 69 | return savedState.getParcelableArrayList(key); |
| 70 | } |
| 71 | |
| 72 | public void saveStacks(Bundle outState) { |
| 73 | outState.putParcelableArrayList(APPLIED_STACK_KEY, new ArrayList<Filter>(appliedStack)); |
| 74 | outState.putParcelableArrayList(REDO_STACK_KEY, new ArrayList<Filter>(redoStack)); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 75 | } |
| 76 | |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 77 | private void reallocateBuffer(int target) { |
| 78 | int other = target ^ 1; |
| 79 | buffers[target] = Photo.create(buffers[other].width(), buffers[other].height()); |
| 80 | } |
| 81 | |
| 82 | private void invalidate() { |
| 83 | // In/out buffers need redrawn by re-applying filters on source photo. |
Yuli Huang | c7e39d1 | 2011-10-05 16:22:10 +0800 | [diff] [blame] | 84 | for (int i = 0; i < buffers.length; i++) { |
| 85 | if (buffers[i] != null) { |
| 86 | buffers[i].clear(); |
| 87 | buffers[i] = null; |
| 88 | } |
| 89 | } |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 90 | if (source != null) { |
| 91 | buffers[0] = Photo.create(source.width(), source.height()); |
| 92 | reallocateBuffer(1); |
| 93 | |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 94 | // Source photo will be displayed if there is no filter stacked. |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 95 | Photo photo = source; |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 96 | int size = outputTopFilter ? appliedStack.size() : appliedStack.size() - 1; |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 97 | for (int i = 0; i < size && !paused; i++) { |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 98 | photo = runFilter(i); |
| 99 | } |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 100 | // Clear photo-view transformation when the top filter will be outputted. |
| 101 | photoView.setPhoto(photo, outputTopFilter); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 102 | } |
| 103 | } |
| 104 | |
| 105 | private void invalidateTopFilter() { |
| 106 | if (!appliedStack.empty()) { |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 107 | outputTopFilter = true; |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 108 | photoView.setPhoto(runFilter(appliedStack.size() - 1), true); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 109 | } |
| 110 | } |
| 111 | |
| 112 | private Photo runFilter(int filterIndex) { |
| 113 | int out = getOutBufferIndex(filterIndex); |
| 114 | Photo input = (filterIndex > 0) ? buffers[out ^ 1] : source; |
| 115 | if ((input != null) && (buffers[out] != null)) { |
| 116 | if (!buffers[out].matchDimension(input)) { |
| 117 | buffers[out].clear(); |
| 118 | reallocateBuffer(out); |
| 119 | } |
Yuli Huang | c7e39d1 | 2011-10-05 16:22:10 +0800 | [diff] [blame] | 120 | appliedStack.get(filterIndex).process(input, buffers[out]); |
Ruei-sung Lin | e5c8ed7 | 2012-05-31 11:59:31 -0700 | [diff] [blame] | 121 | nativeEglSetFenceAndWait(); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 122 | return buffers[out]; |
| 123 | } |
| 124 | return null; |
| 125 | } |
| 126 | |
| 127 | private int getOutBufferIndex(int filterIndex) { |
| 128 | // buffers[0] and buffers[1] are swapped in turns as the in/out buffers for |
| 129 | // processing stacked filters. For example, the first filter reads buffer[0] and |
| 130 | // writes buffer[1]; the second filter then reads buffer[1] and writes buffer[0]. |
| 131 | // The returned index should only be used when the applied filter stack isn't empty. |
| 132 | return (filterIndex + 1) % 2; |
| 133 | } |
| 134 | |
| 135 | private void callbackDone(final OnDoneCallback callback) { |
Yuli Huang | ae70ae4 | 2011-10-01 02:05:06 +0800 | [diff] [blame] | 136 | // GL thread calls back to report UI thread the task is done. |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 137 | photoView.post(new Runnable() { |
| 138 | |
| 139 | @Override |
| 140 | public void run() { |
| 141 | callback.onDone(); |
| 142 | } |
| 143 | }); |
| 144 | } |
| 145 | |
| 146 | private void stackChanged() { |
Yuli Huang | ae70ae4 | 2011-10-01 02:05:06 +0800 | [diff] [blame] | 147 | // GL thread calls back to report UI thread the stack is changed. |
| 148 | final boolean canUndo = !appliedStack.empty(); |
| 149 | final boolean canRedo = !redoStack.empty(); |
| 150 | photoView.post(new Runnable() { |
| 151 | |
| 152 | @Override |
| 153 | public void run() { |
| 154 | stackListener.onStackChanged(canUndo, canRedo); |
| 155 | } |
| 156 | }); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 157 | } |
| 158 | |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 159 | public void getOutputBitmap(final OnDoneBitmapCallback callback) { |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 160 | photoView.queue(new Runnable() { |
| 161 | |
| 162 | @Override |
| 163 | public void run() { |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 164 | int filterIndex = appliedStack.size() - (outputTopFilter ? 1 : 2); |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 165 | Photo photo = (filterIndex < 0) ? source : buffers[getOutBufferIndex(filterIndex)]; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 166 | final Bitmap bitmap = (photo != null) ? photo.save() : null; |
| 167 | photoView.post(new Runnable() { |
| 168 | |
| 169 | @Override |
| 170 | public void run() { |
| 171 | callback.onDone(bitmap); |
| 172 | } |
| 173 | }); |
| 174 | } |
| 175 | }); |
| 176 | } |
| 177 | |
| 178 | public void setPhotoSource(final Bitmap bitmap, final OnDoneCallback callback) { |
| 179 | photoView.queue(new Runnable() { |
| 180 | |
| 181 | @Override |
| 182 | public void run() { |
| 183 | source = Photo.create(bitmap); |
| 184 | invalidate(); |
| 185 | callbackDone(callback); |
| 186 | } |
| 187 | }); |
| 188 | } |
| 189 | |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 190 | private void pushFilterInternal(Filter filter) { |
| 191 | appliedStack.push(filter); |
Yuli Huang | 738e82e | 2011-11-04 16:39:50 +0800 | [diff] [blame] | 192 | outputTopFilter = false; |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 193 | stackChanged(); |
| 194 | } |
| 195 | |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 196 | public void pushFilter(final Filter filter) { |
| 197 | photoView.queue(new Runnable() { |
| 198 | |
| 199 | @Override |
| 200 | public void run() { |
| 201 | while (!redoStack.empty()) { |
| 202 | redoStack.pop().release(); |
| 203 | } |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 204 | pushFilterInternal(filter); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 205 | } |
| 206 | }); |
| 207 | } |
| 208 | |
| 209 | public void undo(final OnDoneCallback callback) { |
| 210 | photoView.queue(new Runnable() { |
| 211 | |
| 212 | @Override |
| 213 | public void run() { |
| 214 | if (!appliedStack.empty()) { |
| 215 | redoStack.push(appliedStack.pop()); |
| 216 | stackChanged(); |
| 217 | invalidate(); |
| 218 | } |
| 219 | callbackDone(callback); |
| 220 | } |
| 221 | }); |
| 222 | } |
| 223 | |
| 224 | public void redo(final OnDoneCallback callback) { |
| 225 | photoView.queue(new Runnable() { |
| 226 | |
| 227 | @Override |
| 228 | public void run() { |
| 229 | if (!redoStack.empty()) { |
Yuli Huang | e0e82f1 | 2011-10-10 00:55:26 +0800 | [diff] [blame] | 230 | pushFilterInternal(redoStack.pop()); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 231 | invalidateTopFilter(); |
| 232 | } |
| 233 | callbackDone(callback); |
| 234 | } |
| 235 | }); |
| 236 | } |
| 237 | |
| 238 | public void topFilterChanged(final OnDoneCallback callback) { |
| 239 | // Remove the outdated top-filter change before queuing a new one. |
| 240 | if (queuedTopFilterChange != null) { |
| 241 | photoView.remove(queuedTopFilterChange); |
| 242 | } |
| 243 | queuedTopFilterChange = new Runnable() { |
| 244 | |
| 245 | @Override |
| 246 | public void run() { |
| 247 | invalidateTopFilter(); |
| 248 | callbackDone(callback); |
| 249 | } |
| 250 | }; |
| 251 | photoView.queue(queuedTopFilterChange); |
| 252 | } |
| 253 | |
| 254 | public void onPause() { |
| 255 | // Flush pending queued operations and release effect-context before GL context is lost. |
Yuli Huang | c7e39d1 | 2011-10-05 16:22:10 +0800 | [diff] [blame] | 256 | // Use the flag to break from lengthy invalidate() in GL thread for not blocking onPause(). |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 257 | paused = true; |
| 258 | photoView.flush(); |
| 259 | photoView.queueEvent(new Runnable() { |
| 260 | |
| 261 | @Override |
| 262 | public void run() { |
Yuli Huang | c7e39d1 | 2011-10-05 16:22:10 +0800 | [diff] [blame] | 263 | Filter.releaseContext(); |
Yuli Huang | eb83d83 | 2011-10-11 21:23:22 +0800 | [diff] [blame] | 264 | // Textures will be automatically deleted when GL context is lost. |
| 265 | photoView.setPhoto(null, false); |
| 266 | source = null; |
Yuli Huang | c7e39d1 | 2011-10-05 16:22:10 +0800 | [diff] [blame] | 267 | for (int i = 0; i < buffers.length; i++) { |
Yuli Huang | c7e39d1 | 2011-10-05 16:22:10 +0800 | [diff] [blame] | 268 | buffers[i] = null; |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 269 | } |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 270 | } |
| 271 | }); |
| 272 | photoView.onPause(); |
| 273 | } |
| 274 | |
| 275 | public void onResume() { |
| 276 | photoView.onResume(); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 277 | paused = false; |
| 278 | } |
Ruei-sung Lin | e5c8ed7 | 2012-05-31 11:59:31 -0700 | [diff] [blame] | 279 | |
| 280 | static { |
| 281 | System.loadLibrary("jni_eglfence"); |
| 282 | } |
| 283 | |
| 284 | private native void nativeEglSetFenceAndWait(); |
Yuli Huang | 6a12ad7 | 2011-09-12 22:25:30 +0800 | [diff] [blame] | 285 | } |