Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/gfx/thebes/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 13 kB

Quelle gfxAndroidPlatform.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "base/basictypes.h"

#include "gfxAndroidPlatform.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/CountingAllocatorBase.h"
#include "mozilla/intl/LocaleService.h"
#include "mozilla/intl/OSPreferences.h"
#include "mozilla/java/GeckoAppShellWrappers.h"
#include "mozilla/jni/Utils.h"
#include "mozilla/layers/AndroidHardwareBuffer.h"
#include "mozilla/Preferences.h"
#include "mozilla/StaticPrefs_gfx.h"
#include "mozilla/StaticPrefs_webgl.h"
#include "mozilla/widget/AndroidVsync.h"

#include "AndroidBuild.h"
#include "AndroidSystemFontIterator.h"
#include "GeckoProfiler.h"
#include "gfx2DGlue.h"
#include "gfxFT2FontList.h"
#include "gfxImageSurface.h"
#include "gfxTextRun.h"
#include "nsXULAppAPI.h"
#include "nsIScreen.h"
#include "nsServiceManagerUtils.h"
#include "nsUnicodeProperties.h"
#include "cairo.h"
#include "VsyncSource.h"

#include "ft2build.h"
#include FT_FREETYPE_H
#include FT_MODULE_H

using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::unicode;
using mozilla::intl::LocaleService;
using mozilla::intl::OSPreferences;

static FT_Library gPlatformFTLibrary = nullptr;

class FreetypeReporter final : public nsIMemoryReporter,
                               public CountingAllocatorBase<FreetypeReporter> {
private:
  ~FreetypeReporter() {}

public:
  NS_DECL_ISUPPORTS

  static void* Malloc(FT_Memory, long size) { return CountingMalloc(size); }

  static void Free(FT_Memory, void* p) { return CountingFree(p); }

  static void* Realloc(FT_Memory, long cur_size, long new_size, void* p) {
    return CountingRealloc(p, new_size);
  }

  NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
                            nsISupports* aData, bool aAnonymize) override {
    MOZ_COLLECT_REPORT("explicit/freetype", KIND_HEAP, UNITS_BYTES,
                       MemoryAllocated(), "Memory used by Freetype.");

    return NS_OK;
  }
};

NS_IMPL_ISUPPORTS(FreetypeReporter, nsIMemoryReporter)

static FT_MemoryRec_ sFreetypeMemoryRecord;

void gfxAndroidPlatform::FontAPIInitializeCallback(void* aUnused) {
  AUTO_PROFILER_REGISTER_THREAD("InitializingFontAPI");
  PR_SetCurrentThreadName("InitializingFontAPI");

  // Call ASystemFontIterator_open
  AndroidSystemFontIterator iterator;
  iterator.Init();
}

PRThread* gfxAndroidPlatform::sFontAPIInitializeThread = nullptr;
MOZ_CONSTINIT nsCString gfxAndroidPlatform::sManufacturer;

// static
bool gfxAndroidPlatform::IsFontAPIDisabled(bool aDontCheckPref) {
  if (!aDontCheckPref &&
      StaticPrefs::gfx_font_list_use_font_match_api_force_enabled_AtStartup()) {
    return false;
  }

  // OPPO, realme and OnePlus device seem to crash when using font match API
  // (Bug 1787551).

  if (sManufacturer.IsEmpty()) {
    sManufacturer = java::sdk::Build::MANUFACTURER()->ToCString();
  }
  return (sManufacturer.EqualsLiteral("OPPO") ||
          sManufacturer.EqualsLiteral("realme") ||
          sManufacturer.EqualsLiteral("OnePlus"));
}

// static
void gfxAndroidPlatform::InitializeFontAPI() {
  if (XRE_GetProcessType() != GeckoProcessType_Default) {
    return;
  }

  // Android 12+ doesn't read font configuration XML files directly.
  // It means that it is slow to call font API at first.
  if (jni::GetAPIVersion() < 31) {
    return;
  }

  // This will be called before XPCOM service isn't started. So don't check
  // preferences.
  if (IsFontAPIDisabled(true)) {
    return;
  }

  sFontAPIInitializeThread = PR_CreateThread(
      PR_USER_THREAD, FontAPIInitializeCallback, nullptr, PR_PRIORITY_NORMAL,
      PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
}

// static
void gfxAndroidPlatform::WaitForInitializeFontAPI() {
  if (sFontAPIInitializeThread) {
    PR_JoinThread(sFontAPIInitializeThread);
    sFontAPIInitializeThread = nullptr;
  }
}

gfxAndroidPlatform::gfxAndroidPlatform() {
  // A custom allocator.  It counts allocations, enabling memory reporting.
  sFreetypeMemoryRecord.user = nullptr;
  sFreetypeMemoryRecord.alloc = FreetypeReporter::Malloc;
  sFreetypeMemoryRecord.free = FreetypeReporter::Free;
  sFreetypeMemoryRecord.realloc = FreetypeReporter::Realloc;

  // These two calls are equivalent to FT_Init_FreeType(), but allow us to
  // provide a custom memory allocator.
  FT_New_Library(&sFreetypeMemoryRecord, &gPlatformFTLibrary);
  FT_Add_Default_Modules(gPlatformFTLibrary);

  Factory::SetFTLibrary(gPlatformFTLibrary);

  RegisterStrongMemoryReporter(new FreetypeReporter());

  // Bug 1886573: At this point, we don't yet have primary screen depth.
  // This setting of screen depth to 0 is preserving existing behavior,
  // and should be fixed.
  int32_t screenDepth = 0;
  mOffscreenFormat = screenDepth == 16 ? SurfaceFormat::R5G6B5_UINT16
                                       : SurfaceFormat::X8R8G8B8_UINT32;

  if (StaticPrefs::gfx_android_rgb16_force_AtStartup()) {
    mOffscreenFormat = SurfaceFormat::R5G6B5_UINT16;
  }
}

gfxAndroidPlatform::~gfxAndroidPlatform() {
  FT_Done_Library(gPlatformFTLibrary);
  gPlatformFTLibrary = nullptr;
  layers::AndroidHardwareBufferManager::Shutdown();
  layers::AndroidHardwareBufferApi::Shutdown();
}

void gfxAndroidPlatform::InitAcceleration() { gfxPlatform::InitAcceleration(); }

already_AddRefed<gfxASurface> gfxAndroidPlatform::CreateOffscreenSurface(
    const IntSize& aSize, gfxImageFormat aFormat) {
  if (!Factory::AllowedSurfaceSize(aSize)) {
    return nullptr;
  }

  RefPtr<gfxASurface> newSurface;
  newSurface = new gfxImageSurface(aSize, aFormat);

  return newSurface.forget();
}

static bool IsJapaneseLocale() {
  static bool sInitialized = false;
  static bool sIsJapanese = false;

  if (!sInitialized) {
    sInitialized = true;

    nsAutoCString appLocale;
    LocaleService::GetInstance()->GetAppLocaleAsBCP47(appLocale);

    const nsDependentCSubstring lang(appLocale, 0, 2);
    if (lang.EqualsLiteral("ja")) {
      sIsJapanese = true;
    } else {
      OSPreferences::GetInstance()->GetSystemLocale(appLocale);

      const nsDependentCSubstring lang(appLocale, 0, 2);
      if (lang.EqualsLiteral("ja")) {
        sIsJapanese = true;
      }
    }
  }

  return sIsJapanese;
}

void gfxAndroidPlatform::GetCommonFallbackFonts(
    uint32_t aCh, Script aRunScript, eFontPresentation aPresentation,
    nsTArray<const char*>& aFontList) {
  static const char kDroidSansJapanese[] = "Droid Sans Japanese";
  static const char kMotoyaLMaru[] = "MotoyaLMaru";
  static const char kNotoSansCJKJP[] = "Noto Sans CJK JP";
  static const char kNotoColorEmoji[] = "Noto Color Emoji";

  if (PrefersColor(aPresentation)) {
    aFontList.AppendElement(kNotoColorEmoji);
  }

  if (IS_IN_BMP(aCh)) {
    // try language-specific "Droid Sans *" and "Noto Sans *" fonts for
    // certain blocks, as most devices probably have these
    uint8_t block = (aCh >> 8) & 0xff;
    switch (block) {
      case 0x05:
        aFontList.AppendElement("Noto Sans Hebrew");
        aFontList.AppendElement("Droid Sans Hebrew");
        aFontList.AppendElement("Noto Sans Armenian");
        aFontList.AppendElement("Droid Sans Armenian");
        break;
      case 0x06:
        aFontList.AppendElement("Noto Sans Arabic");
        aFontList.AppendElement("Droid Sans Arabic");
        break;
      case 0x09:
        aFontList.AppendElement("Noto Sans Devanagari");
        aFontList.AppendElement("Noto Sans Bengali");
        aFontList.AppendElement("Droid Sans Devanagari");
        break;
      case 0x0a:
        aFontList.AppendElement("Noto Sans Gurmukhi");
        aFontList.AppendElement("Noto Sans Gujarati");
        break;
      case 0x0b:
        aFontList.AppendElement("Noto Sans Tamil");
        aFontList.AppendElement("Noto Sans Oriya");
        aFontList.AppendElement("Droid Sans Tamil");
        break;
      case 0x0c:
        aFontList.AppendElement("Noto Sans Telugu");
        aFontList.AppendElement("Noto Sans Kannada");
        break;
      case 0x0d:
        aFontList.AppendElement("Noto Sans Malayalam");
        aFontList.AppendElement("Noto Sans Sinhala");
        break;
      case 0x0e:
        aFontList.AppendElement("Noto Sans Thai");
        aFontList.AppendElement("Noto Sans Lao");
        aFontList.AppendElement("Droid Sans Thai");
        break;
      case 0x0f:
        aFontList.AppendElement("Noto Sans Tibetan");
        break;
      case 0x10:
      case 0x2d:
        aFontList.AppendElement("Noto Sans Georgian");
        aFontList.AppendElement("Droid Sans Georgian");
        break;
      case 0x12:
      case 0x13:
        aFontList.AppendElement("Noto Sans Ethiopic");
        aFontList.AppendElement("Droid Sans Ethiopic");
        break;
      case 0x21:
      case 0x23:
      case 0x24:
      case 0x26:
      case 0x27:
      case 0x29:
        aFontList.AppendElement("Noto Sans Symbols");
        break;
      case 0xf9:
      case 0xfa:
        if (IsJapaneseLocale()) {
          aFontList.AppendElement(kMotoyaLMaru);
          aFontList.AppendElement(kNotoSansCJKJP);
          aFontList.AppendElement(kDroidSansJapanese);
        }
        break;
      default:
        if (block >= 0x2e && block <= 0x9f && IsJapaneseLocale()) {
          aFontList.AppendElement(kMotoyaLMaru);
          aFontList.AppendElement(kNotoSansCJKJP);
          aFontList.AppendElement(kDroidSansJapanese);
        }
        break;
    }
  }
  // and try Droid Sans Fallback as a last resort
  aFontList.AppendElement("Droid Sans Fallback");
}

bool gfxAndroidPlatform::CreatePlatformFontList() {
  return gfxPlatformFontList::Initialize(new gfxFT2FontList);
}

void gfxAndroidPlatform::ReadSystemFontList(
    mozilla::dom::SystemFontList* aFontList) {
  gfxFT2FontList::PlatformFontList()->ReadSystemFontList(aFontList);
}

bool gfxAndroidPlatform::FontHintingEnabled() {
  // In "mobile" builds, we sometimes use non-reflow-zoom, so we
  // might not want hinting.  Let's see.

#ifdef MOZ_WIDGET_ANDROID
  // On Android, we currently only use gecko to render web
  // content that can always be be non-reflow-zoomed.  So turn off
  // hinting.
  //
  // XXX when gecko-android-java is used as an "app runtime", we may
  // want to re-enable hinting for non-browser processes there.
  //
  // If this value is changed, we must ensure that the argument passed
  // to SkInitCairoFT() in GPUParent::RecvInit() is also updated.
  return false;
#endif  //  MOZ_WIDGET_ANDROID

  // Currently, we don't have any other targets, but if/when we do,
  // decide how to handle them here.

  MOZ_ASSERT_UNREACHABLE("oops, what platform is this?");
  return gfxPlatform::FontHintingEnabled();
}

bool gfxAndroidPlatform::RequiresLinearZoom() {
#ifdef MOZ_WIDGET_ANDROID
  // On Android, we currently only use gecko to render web
  // content that can always be be non-reflow-zoomed.
  //
  // XXX when gecko-android-java is used as an "app runtime", we may
  // want to use linear zoom only for the web browser process, not other apps.
  return true;
#endif

  MOZ_ASSERT_UNREACHABLE("oops, what platform is this?");
  return gfxPlatform::RequiresLinearZoom();
}

bool gfxAndroidPlatform::CheckVariationFontSupport() {
  // Don't attempt to use variations on Android API versions up to Marshmallow,
  // because the system freetype version is too old and the parent process may
  // access it during printing (bug 1845174).
  return jni::GetAPIVersion() > 23;
}

class AndroidVsyncSource final : public VsyncSource,
                                 public widget::AndroidVsync::Observer {
public:
  AndroidVsyncSource() : mAndroidVsync(widget::AndroidVsync::GetInstance()) {}

  bool IsVsyncEnabled() override {
    MOZ_ASSERT(NS_IsMainThread());
    return mObservingVsync;
  }

  void EnableVsync() override {
    MOZ_ASSERT(NS_IsMainThread());

    if (mObservingVsync) {
      return;
    }

    float fps = java::GeckoAppShell::GetScreenRefreshRate();
    MOZ_ASSERT(fps > 0.0f);
    mVsyncRate = TimeDuration::FromMilliseconds(1000.0 / fps);
    mAndroidVsync->RegisterObserver(this, widget::AndroidVsync::RENDER);
    mObservingVsync = true;
  }

  void DisableVsync() override {
    MOZ_ASSERT(NS_IsMainThread());

    if (!mObservingVsync) {
      return;
    }
    mAndroidVsync->UnregisterObserver(this, widget::AndroidVsync::RENDER);
    mObservingVsync = false;
  }

  TimeDuration GetVsyncRate() override { return mVsyncRate; }

  void Shutdown() override { DisableVsync(); }

  // Override for the widget::AndroidVsync::Observer method
  void OnVsync(const TimeStamp& aTimeStamp) override {
    // Use the timebase from the frame callback as the vsync time, unless it
    // is in the future.
    TimeStamp now = TimeStamp::Now();
    TimeStamp vsyncTime = aTimeStamp < now ? aTimeStamp : now;
    TimeStamp outputTime = vsyncTime + GetVsyncRate();

    NotifyVsync(vsyncTime, outputTime);
  }

  void OnMaybeUpdateRefreshRate() override {
    NS_DispatchToMainThread(
        NS_NewRunnableFunction(__func__, [self = RefPtr{this}]() {
          if (!self->mObservingVsync) {
            return;
          }
          self->DisableVsync();
          self->EnableVsync();
        }));
  }

private:
  virtual ~AndroidVsyncSource() { DisableVsync(); }

  RefPtr<widget::AndroidVsync> mAndroidVsync;
  TimeDuration mVsyncRate;
  bool mObservingVsync = false;
};

already_AddRefed<mozilla::gfx::VsyncSource>
gfxAndroidPlatform::CreateGlobalHardwareVsyncSource() {
  RefPtr<AndroidVsyncSource> vsyncSource = new AndroidVsyncSource();
  return vsyncSource.forget();
}

quality100%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.