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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /gfx/thebes/gfxFontInfoLoader.cpp | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | gfx/thebes/gfxFontInfoLoader.cpp | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/gfx/thebes/gfxFontInfoLoader.cpp b/gfx/thebes/gfxFontInfoLoader.cpp new file mode 100644 index 0000000000..41cb519164 --- /dev/null +++ b/gfx/thebes/gfxFontInfoLoader.cpp @@ -0,0 +1,318 @@ +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "gfxFontInfoLoader.h" +#include "mozilla/gfx/Logging.h" +#include "mozilla/AppShutdown.h" +#include "nsCRT.h" +#include "nsIObserverService.h" +#include "nsThreadUtils.h" // for nsRunnable +#include "gfxPlatformFontList.h" + +#ifdef XP_WIN +# include <windows.h> +#endif + +using namespace mozilla; +using services::GetObserverService; + +#define LOG_FONTINIT(args) \ + MOZ_LOG(gfxPlatform::GetLog(eGfxLog_fontinit), LogLevel::Debug, args) +#define LOG_FONTINIT_ENABLED() \ + MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_fontinit), LogLevel::Debug) + +void FontInfoData::Load() { + TimeStamp start = TimeStamp::Now(); + + uint32_t i, n = mFontFamiliesToLoad.Length(); + mLoadStats.families = n; + for (i = 0; i < n && !mCanceled; i++) { + // font file memory mapping sometimes causes exceptions - bug 1100949 + MOZ_SEH_TRY { LoadFontFamilyData(mFontFamiliesToLoad[i]); } + MOZ_SEH_EXCEPT(EXCEPTION_EXECUTE_HANDLER) { + gfxCriticalError() << "Exception occurred reading font data for " + << mFontFamiliesToLoad[i].get(); + } + } + + mLoadTime = TimeStamp::Now() - start; +} + +class FontInfoLoadCompleteEvent : public Runnable { + virtual ~FontInfoLoadCompleteEvent() = default; + + public: + NS_INLINE_DECL_REFCOUNTING_INHERITED(FontInfoLoadCompleteEvent, Runnable) + + explicit FontInfoLoadCompleteEvent(FontInfoData* aFontInfo) + : mozilla::Runnable("FontInfoLoadCompleteEvent"), mFontInfo(aFontInfo) {} + + NS_IMETHOD Run() override; + + private: + RefPtr<FontInfoData> mFontInfo; +}; + +class AsyncFontInfoLoader : public Runnable { + virtual ~AsyncFontInfoLoader() = default; + + public: + NS_INLINE_DECL_REFCOUNTING_INHERITED(AsyncFontInfoLoader, Runnable) + + explicit AsyncFontInfoLoader(FontInfoData* aFontInfo) + : mozilla::Runnable("AsyncFontInfoLoader"), mFontInfo(aFontInfo) { + mCompleteEvent = new FontInfoLoadCompleteEvent(aFontInfo); + } + + NS_IMETHOD Run() override; + + private: + RefPtr<FontInfoData> mFontInfo; + RefPtr<FontInfoLoadCompleteEvent> mCompleteEvent; +}; + +class ShutdownThreadEvent : public Runnable { + virtual ~ShutdownThreadEvent() = default; + + public: + NS_INLINE_DECL_REFCOUNTING_INHERITED(ShutdownThreadEvent, Runnable) + + explicit ShutdownThreadEvent(nsIThread* aThread) + : mozilla::Runnable("ShutdownThreadEvent"), mThread(aThread) {} + NS_IMETHOD Run() override { + mThread->Shutdown(); + return NS_OK; + } + + private: + nsCOMPtr<nsIThread> mThread; +}; + +// runs on main thread after async font info loading is done +nsresult FontInfoLoadCompleteEvent::Run() { + gfxFontInfoLoader* loader = + static_cast<gfxFontInfoLoader*>(gfxPlatformFontList::PlatformFontList()); + + loader->FinalizeLoader(mFontInfo); + + return NS_OK; +} + +// runs on separate thread +nsresult AsyncFontInfoLoader::Run() { + // load platform-specific font info + mFontInfo->Load(); + + // post a completion event that transfer the data to the fontlist + NS_DispatchToMainThread(mCompleteEvent); + + return NS_OK; +} + +NS_IMPL_ISUPPORTS(gfxFontInfoLoader::ShutdownObserver, nsIObserver) + +NS_IMETHODIMP +gfxFontInfoLoader::ShutdownObserver::Observe(nsISupports* aSubject, + const char* aTopic, + const char16_t* someData) { + if (!nsCRT::strcmp(aTopic, "quit-application") || + !nsCRT::strcmp(aTopic, "xpcom-shutdown")) { + mLoader->CancelLoader(); + } else { + MOZ_ASSERT_UNREACHABLE("unexpected notification topic"); + } + return NS_OK; +} + +// StartLoader is usually called at startup with a (prefs-derived) delay value, +// so that the async loader runs shortly after startup, to avoid competing for +// disk i/o etc with other more critical operations. +// However, it may be called with aDelay=0 if we find that the font info (e.g. +// localized names) is needed for layout. In this case we start the loader +// immediately; however, it is still an async process and we may use fallback +// fonts to satisfy layout until it completes. +void gfxFontInfoLoader::StartLoader(uint32_t aDelay) { + if (aDelay == 0 && (mState == stateTimerOff || mState == stateAsyncLoad)) { + // We were asked to load (async) without delay, but have already started, + // so just return and let the loader proceed. + return; + } + + // We observe for "quit-application" above, so avoid initialization after it. + if (NS_WARN_IF(AppShutdown::IsInOrBeyond(ShutdownPhase::AppShutdown))) { + MOZ_ASSERT(!aDelay, "Delayed gfxFontInfoLoader startup after AppShutdown?"); + return; + } + + // sanity check + if (mState != stateInitial && mState != stateTimerOff && + mState != stateTimerOnDelay) { + CancelLoader(); + } + + // Create mFontInfo when we're initially called to set up the delay, rather + // than when called by the DelayedStartCallback, because on the initial call + // we know we'll be holding the gfxPlatformFontList lock. + if (!mFontInfo) { + mFontInfo = CreateFontInfoData(); + if (!mFontInfo) { + // The platform doesn't want anything loaded, so just bail out. + mState = stateTimerOff; + return; + } + } + + AddShutdownObserver(); + + // Caller asked for a delay? ==> start async thread after a delay + if (aDelay) { + // Set up delay timer, or if there is already a timer in place, just + // leave it to do its thing. (This can happen if a StartLoader runnable + // was posted to the main thread from the InitFontList thread, but then + // before it had a chance to run and call StartLoader, the main thread + // re-initialized the list due to a platform notification and called + // StartLoader directly.) + if (mTimer) { + return; + } + mTimer = NS_NewTimer(); + mTimer->InitWithNamedFuncCallback(DelayedStartCallback, this, aDelay, + nsITimer::TYPE_ONE_SHOT, + "gfxFontInfoLoader::StartLoader"); + mState = stateTimerOnDelay; + return; + } + + // Either we've been called back by the DelayedStartCallback when its timer + // fired, or a layout caller has passed aDelay=0 to ask the loader to run + // without further delay. + + // Cancel the delay timer, if any. + if (mTimer) { + mTimer->Cancel(); + mTimer = nullptr; + } + + // initialize + InitLoader(); + + // start async load + nsresult rv = NS_NewNamedThread("Font Loader", + getter_AddRefs(mFontLoaderThread), nullptr); + if (NS_WARN_IF(NS_FAILED(rv))) { + return; + } + + PRThread* prThread; + if (NS_SUCCEEDED(mFontLoaderThread->GetPRThread(&prThread))) { + PR_SetThreadPriority(prThread, PR_PRIORITY_LOW); + } + + mState = stateAsyncLoad; + + nsCOMPtr<nsIRunnable> loadEvent = new AsyncFontInfoLoader(mFontInfo); + + mFontLoaderThread->Dispatch(loadEvent.forget(), NS_DISPATCH_NORMAL); + + if (LOG_FONTINIT_ENABLED()) { + LOG_FONTINIT( + ("(fontinit) fontloader started (fontinfo: %p)\n", mFontInfo.get())); + } +} + +class FinalizeLoaderRunnable : public Runnable { + virtual ~FinalizeLoaderRunnable() = default; + + public: + NS_INLINE_DECL_REFCOUNTING_INHERITED(FinalizeLoaderRunnable, Runnable) + + explicit FinalizeLoaderRunnable(gfxFontInfoLoader* aLoader) + : mozilla::Runnable("FinalizeLoaderRunnable"), mLoader(aLoader) {} + + NS_IMETHOD Run() override { + nsresult rv; + if (mLoader->LoadFontInfo()) { + mLoader->CancelLoader(); + rv = NS_OK; + } else { + nsCOMPtr<nsIRunnable> runnable = this; + rv = NS_DispatchToCurrentThreadQueue( + runnable.forget(), PR_INTERVAL_NO_TIMEOUT, EventQueuePriority::Idle); + } + return rv; + } + + private: + gfxFontInfoLoader* mLoader; +}; + +void gfxFontInfoLoader::FinalizeLoader(FontInfoData* aFontInfo) { + // Avoid loading data if loader has already been canceled. + // This should mean that CancelLoader() ran and the Load + // thread has already Shutdown(), and likely before processing + // the Shutdown event it handled the load event and sent back + // our Completion event, thus we end up here. + if (mState != stateAsyncLoad || mFontInfo != aFontInfo) { + return; + } + + mLoadTime = mFontInfo->mLoadTime; + + MOZ_ASSERT(NS_IsMainThread()); + nsCOMPtr<nsIRunnable> runnable = new FinalizeLoaderRunnable(this); + if (NS_FAILED(NS_DispatchToCurrentThreadQueue(runnable.forget(), + PR_INTERVAL_NO_TIMEOUT, + EventQueuePriority::Idle))) { + NS_WARNING("Failed to finalize async font info"); + } +} + +void gfxFontInfoLoader::CancelLoader() { + if (mState == stateInitial) { + return; + } + mState = stateTimerOff; + if (mTimer) { + mTimer->Cancel(); + mTimer = nullptr; + } + if (mFontInfo) // null during any initial delay + mFontInfo->mCanceled = true; + if (mFontLoaderThread) { + NS_DispatchToMainThread(new ShutdownThreadEvent(mFontLoaderThread)); + mFontLoaderThread = nullptr; + } + RemoveShutdownObserver(); + CleanupLoader(); +} + +gfxFontInfoLoader::~gfxFontInfoLoader() { + RemoveShutdownObserver(); + MOZ_COUNT_DTOR(gfxFontInfoLoader); +} + +void gfxFontInfoLoader::AddShutdownObserver() { + if (mObserver) { + return; + } + + nsCOMPtr<nsIObserverService> obs = GetObserverService(); + if (obs) { + mObserver = new ShutdownObserver(this); + obs->AddObserver(mObserver, "quit-application", false); + obs->AddObserver(mObserver, "xpcom-shutdown", false); + } +} + +void gfxFontInfoLoader::RemoveShutdownObserver() { + if (mObserver) { + nsCOMPtr<nsIObserverService> obs = GetObserverService(); + if (obs) { + obs->RemoveObserver(mObserver, "quit-application"); + obs->RemoveObserver(mObserver, "xpcom-shutdown"); + mObserver = nullptr; + } + } +} |