tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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nsImageModule.cpp (2328B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
      2 *
      3 * This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "nsImageModule.h"
      8 
      9 #include "mozilla/ModuleUtils.h"
     10 #include "mozilla/Preferences.h"
     11 #include "mozilla/StaticPrefs_image.h"
     12 
     13 #include "DecodePool.h"
     14 #include "ImageFactory.h"
     15 #include "nsICategoryManager.h"
     16 #include "nsServiceManagerUtils.h"
     17 #include "ShutdownTracker.h"
     18 #include "SurfaceCache.h"
     19 #include "imgLoader.h"
     20 
     21 using namespace mozilla::image;
     22 
     23 struct ImageEnablementCookie {
     24  bool (*mIsEnabled)();
     25  const nsLiteralCString mMimeType;
     26 };
     27 
     28 static void UpdateDocumentViewerRegistration(const char* aPref, void* aData) {
     29  auto* cookie = static_cast<ImageEnablementCookie*>(aData);
     30 
     31  nsCOMPtr<nsICategoryManager> catMan =
     32      do_GetService(NS_CATEGORYMANAGER_CONTRACTID);
     33  if (!catMan) {
     34    return;
     35  }
     36 
     37  static nsLiteralCString kCategory = "Gecko-Content-Viewers"_ns;
     38  static nsLiteralCString kContractId =
     39      "@mozilla.org/content/plugin/document-loader-factory;1"_ns;
     40 
     41  if (cookie->mIsEnabled()) {
     42    catMan->AddCategoryEntry(kCategory, cookie->mMimeType, kContractId,
     43                             false /* aPersist */, true /* aReplace */);
     44  } else {
     45    catMan->DeleteCategoryEntry(
     46        kCategory, cookie->mMimeType, false /* aPersist */
     47    );
     48  }
     49 }
     50 
     51 static bool sInitialized = false;
     52 nsresult mozilla::image::EnsureModuleInitialized() {
     53  MOZ_ASSERT(NS_IsMainThread());
     54 
     55  if (sInitialized) {
     56    return NS_OK;
     57  }
     58 
     59  static ImageEnablementCookie kJXLCookie = {
     60      mozilla::StaticPrefs::image_jxl_enabled, "image/jxl"_ns};
     61  Preferences::RegisterCallbackAndCall(UpdateDocumentViewerRegistration,
     62                                       "image.jxl.enabled", &kJXLCookie);
     63 
     64  mozilla::image::ShutdownTracker::Initialize();
     65  mozilla::image::ImageFactory::Initialize();
     66  mozilla::image::DecodePool::Initialize();
     67  mozilla::image::SurfaceCache::Initialize();
     68  imgLoader::GlobalInit();
     69  sInitialized = true;
     70  return NS_OK;
     71 }
     72 
     73 void mozilla::image::ShutdownModule() {
     74  if (!sInitialized) {
     75    return;
     76  }
     77  imgLoader::Shutdown();
     78  mozilla::image::SurfaceCache::Shutdown();
     79  sInitialized = false;
     80 }