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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/browser/extensions/image_loader.h" | |
| 6 | |
| 7 #include <map> | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/callback.h" | |
| 11 #include "base/compiler_specific.h" | |
| 12 #include "base/file_util.h" | |
| 13 #include "base/lazy_instance.h" | |
| 14 #include "base/path_service.h" | |
| 15 #include "base/strings/string_number_conversions.h" | |
| 16 #include "base/threading/sequenced_worker_pool.h" | |
| 17 #include "chrome/browser/extensions/image_loader_factory.h" | |
| 18 #include "chrome/common/chrome_paths.h" | |
| 19 #include "content/public/browser/browser_thread.h" | |
| 20 #include "extensions/common/extension.h" | |
| 21 #include "grit/chrome_unscaled_resources.h" | |
| 22 #include "grit/component_extension_resources_map.h" | |
| 23 #include "grit/theme_resources.h" | |
| 24 #include "skia/ext/image_operations.h" | |
| 25 #include "ui/base/resource/resource_bundle.h" | |
| 26 #include "ui/gfx/codec/png_codec.h" | |
| 27 #include "ui/gfx/image/image_family.h" | |
| 28 #include "ui/gfx/image/image_skia.h" | |
| 29 | |
| 30 #if defined(OS_CHROMEOS) | |
| 31 #include "ui/file_manager/file_manager_resource_util.h" | |
| 32 #endif | |
| 33 | |
| 34 #if defined(USE_AURA) | |
| 35 #include "ui/keyboard/keyboard_util.h" | |
| 36 #endif | |
| 37 | |
| 38 using content::BrowserThread; | |
| 39 using extensions::Extension; | |
| 40 using extensions::ImageLoader; | |
| 41 using extensions::Manifest; | |
| 42 | |
| 43 namespace { | |
| 44 | |
| 45 bool ShouldResizeImageRepresentation( | |
| 46 ImageLoader::ImageRepresentation::ResizeCondition resize_method, | |
| 47 const gfx::Size& decoded_size, | |
| 48 const gfx::Size& desired_size) { | |
| 49 switch (resize_method) { | |
| 50 case ImageLoader::ImageRepresentation::ALWAYS_RESIZE: | |
| 51 return decoded_size != desired_size; | |
| 52 case ImageLoader::ImageRepresentation::RESIZE_WHEN_LARGER: | |
| 53 return decoded_size.width() > desired_size.width() || | |
| 54 decoded_size.height() > desired_size.height(); | |
| 55 case ImageLoader::ImageRepresentation::NEVER_RESIZE: | |
| 56 return false; | |
| 57 default: | |
| 58 NOTREACHED(); | |
| 59 return false; | |
| 60 } | |
| 61 } | |
| 62 | |
| 63 SkBitmap ResizeIfNeeded(const SkBitmap& bitmap, | |
| 64 const ImageLoader::ImageRepresentation& image_info) { | |
| 65 gfx::Size original_size(bitmap.width(), bitmap.height()); | |
| 66 if (ShouldResizeImageRepresentation(image_info.resize_condition, | |
| 67 original_size, | |
| 68 image_info.desired_size)) { | |
| 69 return skia::ImageOperations::Resize( | |
| 70 bitmap, skia::ImageOperations::RESIZE_LANCZOS3, | |
| 71 image_info.desired_size.width(), image_info.desired_size.height()); | |
| 72 } | |
| 73 | |
| 74 return bitmap; | |
| 75 } | |
| 76 | |
| 77 void LoadResourceOnUIThread(int resource_id, SkBitmap* bitmap) { | |
| 78 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 79 | |
| 80 gfx::ImageSkia image( | |
| 81 *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id)); | |
| 82 image.MakeThreadSafe(); | |
| 83 *bitmap = *image.bitmap(); | |
| 84 } | |
| 85 | |
| 86 void LoadImageOnBlockingPool(const ImageLoader::ImageRepresentation& image_info, | |
| 87 SkBitmap* bitmap) { | |
| 88 DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread()); | |
| 89 | |
| 90 // Read the file from disk. | |
| 91 std::string file_contents; | |
| 92 base::FilePath path = image_info.resource.GetFilePath(); | |
| 93 if (path.empty() || !base::ReadFileToString(path, &file_contents)) { | |
| 94 return; | |
| 95 } | |
| 96 | |
| 97 const unsigned char* data = | |
| 98 reinterpret_cast<const unsigned char*>(file_contents.data()); | |
| 99 // Note: This class only decodes bitmaps from extension resources. Chrome | |
| 100 // doesn't (for security reasons) directly load extension resources provided | |
| 101 // by the extension author, but instead decodes them in a separate | |
| 102 // locked-down utility process. Only if the decoding succeeds is the image | |
| 103 // saved from memory to disk and subsequently used in the Chrome UI. | |
| 104 // Chrome is therefore decoding bitmaps here that were generated by Chrome. | |
| 105 gfx::PNGCodec::Decode(data, file_contents.length(), bitmap); | |
| 106 } | |
| 107 | |
| 108 // Add the resources from |entries| (there are |size| of them) to | |
| 109 // |path_to_resource_id| after normalizing separators. | |
| 110 void AddComponentResourceEntries( | |
| 111 std::map<base::FilePath, int>* path_to_resource_id, | |
| 112 const GritResourceMap* entries, | |
| 113 size_t size) { | |
| 114 for (size_t i = 0; i < size; ++i) { | |
| 115 base::FilePath resource_path = base::FilePath().AppendASCII( | |
| 116 entries[i].name); | |
| 117 resource_path = resource_path.NormalizePathSeparators(); | |
| 118 | |
| 119 DCHECK(path_to_resource_id->find(resource_path) == | |
| 120 path_to_resource_id->end()); | |
| 121 (*path_to_resource_id)[resource_path] = entries[i].value; | |
| 122 } | |
| 123 } | |
| 124 | |
| 125 std::vector<SkBitmap> LoadResourceBitmaps( | |
| 126 const Extension* extension, | |
| 127 const std::vector<ImageLoader::ImageRepresentation>& info_list) { | |
| 128 // Loading resources has to happen on the UI thread. So do this first, and | |
| 129 // pass the rest of the work off as a blocking pool task. | |
| 130 std::vector<SkBitmap> bitmaps; | |
| 131 bitmaps.resize(info_list.size()); | |
| 132 | |
| 133 int i = 0; | |
| 134 for (std::vector<ImageLoader::ImageRepresentation>::const_iterator | |
| 135 it = info_list.begin(); | |
| 136 it != info_list.end(); | |
| 137 ++it, ++i) { | |
| 138 DCHECK(it->resource.relative_path().empty() || | |
| 139 extension->path() == it->resource.extension_root()); | |
| 140 | |
| 141 int resource_id; | |
| 142 if (extension->location() == Manifest::COMPONENT && | |
| 143 ImageLoader::IsComponentExtensionResource( | |
| 144 extension->path(), it->resource.relative_path(), &resource_id)) { | |
| 145 LoadResourceOnUIThread(resource_id, &bitmaps[i]); | |
| 146 } | |
| 147 } | |
| 148 return bitmaps; | |
| 149 } | |
| 150 | |
| 151 } // namespace | |
| 152 | |
| 153 namespace extensions { | |
| 154 | |
| 155 //////////////////////////////////////////////////////////////////////////////// | |
| 156 // ImageLoader::ImageRepresentation | |
| 157 | |
| 158 ImageLoader::ImageRepresentation::ImageRepresentation( | |
| 159 const ExtensionResource& resource, | |
| 160 ResizeCondition resize_condition, | |
| 161 const gfx::Size& desired_size, | |
| 162 ui::ScaleFactor scale_factor) | |
| 163 : resource(resource), | |
| 164 resize_condition(resize_condition), | |
| 165 desired_size(desired_size), | |
| 166 scale_factor(scale_factor) { | |
| 167 } | |
| 168 | |
| 169 ImageLoader::ImageRepresentation::~ImageRepresentation() { | |
| 170 } | |
| 171 | |
| 172 //////////////////////////////////////////////////////////////////////////////// | |
| 173 // ImageLoader::LoadResult | |
| 174 | |
| 175 struct ImageLoader::LoadResult { | |
| 176 LoadResult(const SkBitmap& bitmap, | |
| 177 const gfx::Size& original_size, | |
| 178 const ImageRepresentation& image_representation); | |
| 179 ~LoadResult(); | |
| 180 | |
| 181 SkBitmap bitmap; | |
| 182 gfx::Size original_size; | |
| 183 ImageRepresentation image_representation; | |
| 184 }; | |
| 185 | |
| 186 ImageLoader::LoadResult::LoadResult( | |
| 187 const SkBitmap& bitmap, | |
| 188 const gfx::Size& original_size, | |
| 189 const ImageLoader::ImageRepresentation& image_representation) | |
| 190 : bitmap(bitmap), | |
| 191 original_size(original_size), | |
| 192 image_representation(image_representation) { | |
| 193 } | |
| 194 | |
| 195 ImageLoader::LoadResult::~LoadResult() { | |
| 196 } | |
| 197 | |
| 198 namespace { | |
| 199 | |
| 200 // Need to be after ImageRepresentation and LoadResult are defined. | |
| 201 std::vector<ImageLoader::LoadResult> LoadImagesOnBlockingPool( | |
| 202 const std::vector<ImageLoader::ImageRepresentation>& info_list, | |
| 203 const std::vector<SkBitmap>& bitmaps) { | |
| 204 DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread()); | |
| 205 std::vector<ImageLoader::LoadResult> load_result; | |
| 206 | |
| 207 for (size_t i = 0; i < info_list.size(); ++i) { | |
| 208 const ImageLoader::ImageRepresentation& image = info_list[i]; | |
| 209 | |
| 210 // If we don't have a path there isn't anything we can do, just skip it. | |
| 211 if (image.resource.relative_path().empty()) | |
| 212 continue; | |
| 213 | |
| 214 SkBitmap bitmap; | |
| 215 if (bitmaps[i].isNull()) | |
| 216 LoadImageOnBlockingPool(image, &bitmap); | |
| 217 else | |
| 218 bitmap = bitmaps[i]; | |
| 219 | |
| 220 // If the image failed to load, skip it. | |
| 221 if (bitmap.isNull() || bitmap.empty()) | |
| 222 continue; | |
| 223 | |
| 224 gfx::Size original_size(bitmap.width(), bitmap.height()); | |
| 225 bitmap = ResizeIfNeeded(bitmap, image); | |
| 226 | |
| 227 load_result.push_back( | |
| 228 ImageLoader::LoadResult(bitmap, original_size, image)); | |
| 229 } | |
| 230 | |
| 231 return load_result; | |
| 232 } | |
| 233 | |
| 234 } // namespace | |
| 235 | |
| 236 //////////////////////////////////////////////////////////////////////////////// | |
| 237 // ImageLoader | |
| 238 | |
| 239 ImageLoader::ImageLoader() | |
| 240 : weak_ptr_factory_(this) { | |
| 241 } | |
| 242 | |
| 243 ImageLoader::~ImageLoader() { | |
| 244 } | |
| 245 | |
| 246 // static | |
| 247 ImageLoader* ImageLoader::Get(content::BrowserContext* context) { | |
| 248 return ImageLoaderFactory::GetForBrowserContext(context); | |
| 249 } | |
| 250 | |
| 251 // A map from a resource path to the resource ID. Used only by | |
| 252 // IsComponentExtensionResource below. | |
| 253 static base::LazyInstance<std::map<base::FilePath, int> > path_to_resource_id = | |
| 254 LAZY_INSTANCE_INITIALIZER; | |
| 255 | |
| 256 // static | |
| 257 bool ImageLoader::IsComponentExtensionResource( | |
| 258 const base::FilePath& extension_path, | |
| 259 const base::FilePath& resource_path, | |
| 260 int* resource_id) { | |
| 261 static const GritResourceMap kExtraComponentExtensionResources[] = { | |
| 262 {"web_store/webstore_icon_128.png", IDR_WEBSTORE_ICON}, | |
| 263 {"web_store/webstore_icon_16.png", IDR_WEBSTORE_ICON_16}, | |
| 264 {"chrome_app/product_logo_128.png", IDR_PRODUCT_LOGO_128}, | |
| 265 {"chrome_app/product_logo_16.png", IDR_PRODUCT_LOGO_16}, | |
| 266 #if defined(ENABLE_SETTINGS_APP) | |
| 267 {"settings_app/settings_app_icon_128.png", IDR_SETTINGS_APP_ICON_128}, | |
| 268 {"settings_app/settings_app_icon_16.png", IDR_SETTINGS_APP_ICON_16}, | |
| 269 {"settings_app/settings_app_icon_32.png", IDR_SETTINGS_APP_ICON_32}, | |
| 270 {"settings_app/settings_app_icon_48.png", IDR_SETTINGS_APP_ICON_48}, | |
| 271 #endif | |
| 272 }; | |
| 273 | |
| 274 if (path_to_resource_id.Get().empty()) { | |
| 275 AddComponentResourceEntries( | |
| 276 path_to_resource_id.Pointer(), | |
| 277 kComponentExtensionResources, | |
| 278 kComponentExtensionResourcesSize); | |
| 279 AddComponentResourceEntries( | |
| 280 path_to_resource_id.Pointer(), | |
| 281 kExtraComponentExtensionResources, | |
| 282 arraysize(kExtraComponentExtensionResources)); | |
| 283 #if defined(OS_CHROMEOS) | |
| 284 size_t file_manager_resource_size; | |
| 285 const GritResourceMap* file_manager_resources = | |
| 286 file_manager::GetFileManagerResources(&file_manager_resource_size); | |
| 287 AddComponentResourceEntries( | |
| 288 path_to_resource_id.Pointer(), | |
| 289 file_manager_resources, | |
| 290 file_manager_resource_size); | |
| 291 | |
| 292 size_t keyboard_resource_size; | |
| 293 const GritResourceMap* keyboard_resources = | |
| 294 keyboard::GetKeyboardExtensionResources(&keyboard_resource_size); | |
| 295 AddComponentResourceEntries( | |
| 296 path_to_resource_id.Pointer(), | |
| 297 keyboard_resources, | |
| 298 keyboard_resource_size); | |
| 299 #endif | |
| 300 } | |
| 301 | |
| 302 base::FilePath directory_path = extension_path; | |
| 303 base::FilePath resources_dir; | |
| 304 base::FilePath relative_path; | |
| 305 if (!PathService::Get(chrome::DIR_RESOURCES, &resources_dir) || | |
| 306 !resources_dir.AppendRelativePath(directory_path, &relative_path)) { | |
| 307 return false; | |
| 308 } | |
| 309 relative_path = relative_path.Append(resource_path); | |
| 310 relative_path = relative_path.NormalizePathSeparators(); | |
| 311 | |
| 312 std::map<base::FilePath, int>::const_iterator entry = | |
| 313 path_to_resource_id.Get().find(relative_path); | |
| 314 if (entry != path_to_resource_id.Get().end()) | |
| 315 *resource_id = entry->second; | |
| 316 | |
| 317 return entry != path_to_resource_id.Get().end(); | |
| 318 } | |
| 319 | |
| 320 void ImageLoader::LoadImageAsync(const Extension* extension, | |
| 321 const ExtensionResource& resource, | |
| 322 const gfx::Size& max_size, | |
| 323 const ImageLoaderImageCallback& callback) { | |
| 324 std::vector<ImageRepresentation> info_list; | |
| 325 info_list.push_back(ImageRepresentation( | |
| 326 resource, | |
| 327 ImageRepresentation::RESIZE_WHEN_LARGER, | |
| 328 max_size, | |
| 329 ui::SCALE_FACTOR_100P)); | |
| 330 LoadImagesAsync(extension, info_list, callback); | |
| 331 } | |
| 332 | |
| 333 void ImageLoader::LoadImagesAsync( | |
| 334 const Extension* extension, | |
| 335 const std::vector<ImageRepresentation>& info_list, | |
| 336 const ImageLoaderImageCallback& callback) { | |
| 337 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 338 DCHECK(!BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread()); | |
| 339 base::PostTaskAndReplyWithResult( | |
| 340 BrowserThread::GetBlockingPool(), | |
| 341 FROM_HERE, | |
| 342 base::Bind(LoadImagesOnBlockingPool, | |
| 343 info_list, | |
| 344 LoadResourceBitmaps(extension, info_list)), | |
| 345 base::Bind( | |
| 346 &ImageLoader::ReplyBack, weak_ptr_factory_.GetWeakPtr(), callback)); | |
| 347 } | |
| 348 | |
| 349 void ImageLoader::LoadImageFamilyAsync( | |
| 350 const extensions::Extension* extension, | |
| 351 const std::vector<ImageRepresentation>& info_list, | |
| 352 const ImageLoaderImageFamilyCallback& callback) { | |
| 353 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 354 DCHECK(!BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread()); | |
| 355 base::PostTaskAndReplyWithResult( | |
| 356 BrowserThread::GetBlockingPool(), | |
| 357 FROM_HERE, | |
| 358 base::Bind(LoadImagesOnBlockingPool, | |
| 359 info_list, | |
| 360 LoadResourceBitmaps(extension, info_list)), | |
| 361 base::Bind(&ImageLoader::ReplyBackWithImageFamily, | |
| 362 weak_ptr_factory_.GetWeakPtr(), | |
| 363 callback)); | |
| 364 } | |
| 365 | |
| 366 void ImageLoader::ReplyBack(const ImageLoaderImageCallback& callback, | |
| 367 const std::vector<LoadResult>& load_result) { | |
| 368 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 369 | |
| 370 gfx::ImageSkia image_skia; | |
| 371 | |
| 372 for (std::vector<LoadResult>::const_iterator it = load_result.begin(); | |
| 373 it != load_result.end(); ++it) { | |
| 374 const SkBitmap& bitmap = it->bitmap; | |
| 375 const ImageRepresentation& image_rep = it->image_representation; | |
| 376 | |
| 377 image_skia.AddRepresentation(gfx::ImageSkiaRep( | |
| 378 bitmap, | |
| 379 ui::GetScaleForScaleFactor(image_rep.scale_factor))); | |
| 380 } | |
| 381 | |
| 382 gfx::Image image; | |
| 383 if (!image_skia.isNull()) { | |
| 384 image_skia.MakeThreadSafe(); | |
| 385 image = gfx::Image(image_skia); | |
| 386 } | |
| 387 | |
| 388 callback.Run(image); | |
| 389 } | |
| 390 | |
| 391 void ImageLoader::ReplyBackWithImageFamily( | |
| 392 const ImageLoaderImageFamilyCallback& callback, | |
| 393 const std::vector<LoadResult>& load_result) { | |
| 394 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
| 395 | |
| 396 std::map<std::pair<int, int>, gfx::ImageSkia> image_skia_map; | |
| 397 gfx::ImageFamily image_family; | |
| 398 | |
| 399 for (std::vector<LoadResult>::const_iterator it = load_result.begin(); | |
| 400 it != load_result.end(); | |
| 401 ++it) { | |
| 402 const SkBitmap& bitmap = it->bitmap; | |
| 403 const ImageRepresentation& image_rep = it->image_representation; | |
| 404 const std::pair<int, int> key = std::make_pair( | |
| 405 image_rep.desired_size.width(), image_rep.desired_size.height()); | |
| 406 // Create a new ImageSkia for this width/height, or add a representation to | |
| 407 // an existing ImageSkia with the same width/height. | |
| 408 image_skia_map[key].AddRepresentation( | |
| 409 gfx::ImageSkiaRep(bitmap, | |
| 410 ui::GetScaleForScaleFactor(image_rep.scale_factor))); | |
| 411 } | |
| 412 | |
| 413 for (std::map<std::pair<int, int>, gfx::ImageSkia>::iterator it = | |
| 414 image_skia_map.begin(); | |
| 415 it != image_skia_map.end(); | |
| 416 ++it) { | |
| 417 it->second.MakeThreadSafe(); | |
| 418 image_family.Add(it->second); | |
| 419 } | |
| 420 | |
| 421 callback.Run(image_family); | |
| 422 } | |
| 423 | |
| 424 } // namespace extensions | |
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Chromium Code Reviews
Issue 334053003:
Moves extension_icon_image and image_loader to extensions/browser (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src