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 33 kB

Quelle gfxPlatformMac.cpp Sprache: C

/* -*- 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 "gfxPlatformMac.h"

#include "gfxQuartzSurface.h"
#include "mozilla/DataMutex.h"
#include "mozilla/gfx/2D.h"

#include "gfxMacFont.h"
#include "gfxCoreTextShaper.h"
#include "gfxTextRun.h"
#include "gfxUserFontSet.h"
#include "gfxConfig.h"

#include "AppleUtils.h"
#include "nsTArray.h"
#include "mozilla/Preferences.h"
#include "mozilla/VsyncDispatcher.h"
#ifdef MOZ_WIDGET_COCOA
#  include "nsCocoaFeatures.h"
#endif
#include "nsComponentManagerUtils.h"
#include "nsIFile.h"
#include "nsUnicodeProperties.h"
#include "qcms.h"
#include "gfx2DGlue.h"
#include "GeckoProfiler.h"
#include "nsThreadUtils.h"

#ifdef MOZ_BUNDLED_FONTS
#  include "mozilla/Telemetry.h"
#  include "nsDirectoryServiceDefs.h"
#  include "mozilla/StaticPrefs_gfx.h"
#endif

#include <dlfcn.h>
#include <CoreVideo/CoreVideo.h>

#include "mozilla/layers/CompositorBridgeParent.h"
#include "mozilla/layers/SurfacePool.h"
#include "VsyncSource.h"

using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::unicode;

using mozilla::dom::SystemFontList;

#ifdef MOZ_WIDGET_COCOA
#  include "gfxMacPlatformFontList.h"
using PlatformFontListClass = gfxMacPlatformFontList;
#else
#  include "IOSPlatformFontList.h"
using PlatformFontListClass = IOSPlatformFontList;
#endif

// A bunch of fonts for "additional language support" are shipped in a
// "Language Support" directory, and don't show up in the standard font
// list returned by CTFontManagerCopyAvailableFontFamilyNames unless
// we explicitly activate them.
static const nsLiteralCString kLangFontsDirs[] = {
    "/Library/Application Support/Apple/Fonts/Language Support"_ns,
    "/System/Library/Fonts/Supplemental"_ns};

/* static */
void gfxPlatformMac::FontRegistrationCallback(void* aUnused) {
  AUTO_PROFILER_REGISTER_THREAD("RegisterFonts");
  PR_SetCurrentThreadName("RegisterFonts");

  for (const auto& dir : kLangFontsDirs) {
    PlatformFontListClass::ActivateFontsFromDir(dir);
  }
}

PRThread* gfxPlatformMac::sFontRegistrationThread = nullptr;

/* This is called from XPCOM_Init during startup (before gfxPlatform has been
   initialized), so that it can kick off the font activation on a secondary
   thread, and hope that it'll be finished by the time we're ready to build
   our font list. */
/* static */
void gfxPlatformMac::RegisterSupplementalFonts() {
  if (XRE_GetProcessType() == GeckoProcessType_Default) {
    // We activate the fonts on a separate thread, to minimize the startup-
    // time cost.
    sFontRegistrationThread = PR_CreateThread(
        PR_USER_THREAD, FontRegistrationCallback, nullptr, PR_PRIORITY_NORMAL,
        PR_GLOBAL_THREAD, PR_JOINABLE_THREAD, 0);
  }
}

/* static */
void gfxPlatformMac::WaitForFontRegistration() {
  if (sFontRegistrationThread) {
    PR_JoinThread(sFontRegistrationThread);
    sFontRegistrationThread = nullptr;
  }
}

gfxPlatformMac::gfxPlatformMac() {
  mFontAntiAliasingThreshold = ReadAntiAliasingThreshold();

  InitBackendPrefs(GetBackendPrefs());
}

gfxPlatformMac::~gfxPlatformMac() { gfxCoreTextShaper::Shutdown(); }

BackendPrefsData gfxPlatformMac::GetBackendPrefs() const {
  BackendPrefsData data;

  data.mCanvasBitmask = BackendTypeBit(BackendType::SKIA);
  data.mContentBitmask = BackendTypeBit(BackendType::SKIA);
  data.mCanvasDefault = BackendType::SKIA;
  data.mContentDefault = BackendType::SKIA;

  return data;
}

bool gfxPlatformMac::CreatePlatformFontList() {
  return gfxPlatformFontList::Initialize(new PlatformFontListClass);
}

void gfxPlatformMac::ReadSystemFontList(SystemFontList* aFontList) {
  PlatformFontListClass::PlatformFontList()->ReadSystemFontList(aFontList);
}

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

  RefPtr<gfxASurface> newSurface = new gfxQuartzSurface(aSize, aFormat);
  return newSurface.forget();
}

void gfxPlatformMac::GetCommonFallbackFonts(uint32_t aCh, Script aRunScript,
                                            eFontPresentation aPresentation,
                                            nsTArray<const char*>& aFontList) {
  if (PrefersColor(aPresentation)) {
    aFontList.AppendElement("Apple Color Emoji");
  }

  switch (aRunScript) {
    case Script::INVALID:
    case Script::NUM_SCRIPT_CODES:
      // Ensure the switch covers all the Script enum values.
      MOZ_ASSERT_UNREACHABLE("bad script code");
      break;

    case Script::COMMON:
    case Script::INHERITED:
      // In most cases, COMMON and INHERITED characters will be merged into
      // their context, but if they occur without any specific script context
      // we'll just try common default fonts here.
    case Script::LATIN:
    case Script::CYRILLIC:
    case Script::GREEK:
      aFontList.AppendElement("Lucida Grande");
      break;

    case Script::MATHEMATICAL_NOTATION:
    case Script::SYMBOLS:
    case Script::SYMBOLS_EMOJI:
      // Not currently returned by script run resolution (but see below, after
      // the switch).
      break;

    // CJK-related script codes are a bit troublesome because of unification;
    // we'll probably just get HAN much of the time, so the choice of which
    // language font to try for fallback is rather arbitrary. Usually, though,
    // we hope that font prefs will have handled this earlier.
    case Script::BOPOMOFO:
    case Script::HAN_WITH_BOPOMOFO:
    case Script::SIMPLIFIED_HAN:
    case Script::HAN:
      aFontList.AppendElement("Songti SC");
      if (aCh > 0x10000) {
        // macOS installations with MS Office may have these -ExtB fonts
        aFontList.AppendElement("SimSun-ExtB");
      }
      break;

    // Currently, we don't resolve script runs to this value, but we may do so
    // in future if we get better at handling things like `lang=zh-Hant`, not
    // just resolving based on the Unicode text.
    case Script::TRADITIONAL_HAN:
      aFontList.AppendElement("Songti TC");
      if (aCh > 0x10000) {
        // macOS installations with MS Office may have these -ExtB fonts
        aFontList.AppendElement("MingLiU-ExtB");
      }
      break;

    case Script::HIRAGANA:
    case Script::KATAKANA:
    case Script::KATAKANA_OR_HIRAGANA:
    case Script::JAPANESE:
      aFontList.AppendElement("Hiragino Sans");
      aFontList.AppendElement("Hiragino Kaku Gothic ProN");
      break;

    case Script::JAMO:
    case Script::KOREAN:
    case Script::HANGUL:
      aFontList.AppendElement("Nanum Gothic");
      aFontList.AppendElement("Apple SD Gothic Neo");
      break;

    // For most other scripts, macOS comes with a default font we can use.
    case Script::ARABIC:
      aFontList.AppendElement("Geeza Pro");
      break;
    case Script::ARMENIAN:
      aFontList.AppendElement("Mshtakan");
      break;
    case Script::BENGALI:
      aFontList.AppendElement("Bangla Sangam MN");
      break;
    case Script::CHEROKEE:
      aFontList.AppendElement("Plantagenet Cherokee");
      break;
    case Script::COPTIC:
      aFontList.AppendElement("Noto Sans Coptic");
      break;
    case Script::DESERET:
      aFontList.AppendElement("Baskerville");
      break;
    case Script::DEVANAGARI:
      aFontList.AppendElement("Devanagari Sangam MN");
      break;
    case Script::ETHIOPIC:
      aFontList.AppendElement("Kefa");
      break;
    case Script::GEORGIAN:
      aFontList.AppendElement("Helvetica");
      break;
    case Script::GOTHIC:
      aFontList.AppendElement("Noto Sans Gothic");
      break;
    case Script::GUJARATI:
      aFontList.AppendElement("Gujarati Sangam MN");
      break;
    case Script::GURMUKHI:
      aFontList.AppendElement("Gurmukhi MN");
      break;
    case Script::HEBREW:
      aFontList.AppendElement("Lucida Grande");
      break;
    case Script::KANNADA:
      aFontList.AppendElement("Kannada MN");
      break;
    case Script::KHMER:
      aFontList.AppendElement("Khmer MN");
      break;
    case Script::LAO:
      aFontList.AppendElement("Lao MN");
      break;
    case Script::MALAYALAM:
      aFontList.AppendElement("Malayalam Sangam MN");
      break;
    case Script::MONGOLIAN:
      aFontList.AppendElement("Noto Sans Mongolian");
      break;
    case Script::MYANMAR:
      aFontList.AppendElement("Myanmar MN");
      break;
    case Script::OGHAM:
      aFontList.AppendElement("Noto Sans Ogham");
      break;
    case Script::OLD_ITALIC:
      aFontList.AppendElement("Noto Sans Old Italic");
      break;
    case Script::ORIYA:
      aFontList.AppendElement("Oriya Sangam MN");
      break;
    case Script::RUNIC:
      aFontList.AppendElement("Noto Sans Runic");
      break;
    case Script::SINHALA:
      aFontList.AppendElement("Sinhala Sangam MN");
      break;
    case Script::SYRIAC:
      aFontList.AppendElement("Noto Sans Syriac");
      break;
    case Script::TAMIL:
      aFontList.AppendElement("Tamil MN");
      break;
    case Script::TELUGU:
      aFontList.AppendElement("Telugu MN");
      break;
    case Script::THAANA:
      aFontList.AppendElement("Noto Sans Thaana");
      break;
    case Script::THAI:
      aFontList.AppendElement("Thonburi");
      break;
    case Script::TIBETAN:
      aFontList.AppendElement("Kailasa");
      break;
    case Script::CANADIAN_ABORIGINAL:
      aFontList.AppendElement("Euphemia UCAS");
      break;
    case Script::YI:
      aFontList.AppendElement("Noto Sans Yi");
      aFontList.AppendElement("STHeiti");
      break;
    case Script::TAGALOG:
      aFontList.AppendElement("Noto Sans Tagalog");
      break;
    case Script::HANUNOO:
      aFontList.AppendElement("Noto Sans Hanunoo");
      break;
    case Script::BUHID:
      aFontList.AppendElement("Noto Sans Buhid");
      break;
    case Script::TAGBANWA:
      aFontList.AppendElement("Noto Sans Tagbanwa");
      break;
    case Script::BRAILLE:
      aFontList.AppendElement("Apple Braille");
      break;
    case Script::CYPRIOT:
      aFontList.AppendElement("Noto Sans Cypriot");
      break;
    case Script::LIMBU:
      aFontList.AppendElement("Noto Sans Limbu");
      break;
    case Script::LINEAR_B:
      aFontList.AppendElement("Noto Sans Linear B");
      break;
    case Script::OSMANYA:
      aFontList.AppendElement("Noto Sans Osmanya");
      break;
    case Script::SHAVIAN:
      aFontList.AppendElement("Noto Sans Shavian");
      break;
    case Script::TAI_LE:
      aFontList.AppendElement("Noto Sans Tai Le");
      break;
    case Script::UGARITIC:
      aFontList.AppendElement("Noto Sans Ugaritic");
      break;
    case Script::BUGINESE:
      aFontList.AppendElement("Noto Sans Buginese");
      break;
    case Script::GLAGOLITIC:
      aFontList.AppendElement("Noto Sans Glagolitic");
      break;
    case Script::KHAROSHTHI:
      aFontList.AppendElement("Noto Sans Kharoshthi");
      break;
    case Script::SYLOTI_NAGRI:
      aFontList.AppendElement("Noto Sans Syloti Nagri");
      break;
    case Script::NEW_TAI_LUE:
      aFontList.AppendElement("Noto Sans New Tai Lue");
      break;
    case Script::TIFINAGH:
      aFontList.AppendElement("Noto Sans Tifinagh");
      break;
    case Script::OLD_PERSIAN:
      aFontList.AppendElement("Noto Sans Old Persian");
      break;
    case Script::BALINESE:
      aFontList.AppendElement("Noto Sans Balinese");
      break;
    case Script::BATAK:
      aFontList.AppendElement("Noto Sans Batak");
      break;
    case Script::BRAHMI:
      aFontList.AppendElement("Noto Sans Brahmi");
      break;
    case Script::CHAM:
      aFontList.AppendElement("Noto Sans Cham");
      break;
    case Script::EGYPTIAN_HIEROGLYPHS:
      aFontList.AppendElement("Noto Sans Egyptian Hieroglyphs");
      break;
    case Script::PAHAWH_HMONG:
      aFontList.AppendElement("Noto Sans Pahawh Hmong");
      break;
    case Script::OLD_HUNGARIAN:
      aFontList.AppendElement("Noto Sans Old Hungarian");
      break;
    case Script::JAVANESE:
      aFontList.AppendElement("Noto Sans Javanese");
      break;
    case Script::KAYAH_LI:
      aFontList.AppendElement("Noto Sans Kayah Li");
      break;
    case Script::LEPCHA:
      aFontList.AppendElement("Noto Sans Lepcha");
      break;
    case Script::LINEAR_A:
      aFontList.AppendElement("Noto Sans Linear A");
      break;
    case Script::MANDAIC:
      aFontList.AppendElement("Noto Sans Mandaic");
      break;
    case Script::NKO:
      aFontList.AppendElement("Noto Sans NKo");
      break;
    case Script::OLD_TURKIC:
      aFontList.AppendElement("Noto Sans Old Turkic");
      break;
    case Script::OLD_PERMIC:
      aFontList.AppendElement("Noto Sans Old Permic");
      break;
    case Script::PHAGS_PA:
      aFontList.AppendElement("Noto Sans PhagsPa");
      break;
    case Script::PHOENICIAN:
      aFontList.AppendElement("Noto Sans Phoenician");
      break;
    case Script::MIAO:
      aFontList.AppendElement("Noto Sans Miao");
      break;
    case Script::VAI:
      aFontList.AppendElement("Noto Sans Vai");
      break;
    case Script::CUNEIFORM:
      aFontList.AppendElement("Noto Sans Cuneiform");
      break;
    case Script::CARIAN:
      aFontList.AppendElement("Noto Sans Carian");
      break;
    case Script::TAI_THAM:
      aFontList.AppendElement("Noto Sans Tai Tham");
      break;
    case Script::LYCIAN:
      aFontList.AppendElement("Noto Sans Lycian");
      break;
    case Script::LYDIAN:
      aFontList.AppendElement("Noto Sans Lydian");
      break;
    case Script::OL_CHIKI:
      aFontList.AppendElement("Noto Sans Ol Chiki");
      break;
    case Script::REJANG:
      aFontList.AppendElement("Noto Sans Rejang");
      break;
    case Script::SAURASHTRA:
      aFontList.AppendElement("Noto Sans Saurashtra");
      break;
    case Script::SUNDANESE:
      aFontList.AppendElement("Noto Sans Sundanese");
      break;
    case Script::MEETEI_MAYEK:
      aFontList.AppendElement("Noto Sans Meetei Mayek");
      break;
    case Script::IMPERIAL_ARAMAIC:
      aFontList.AppendElement("Noto Sans Imperial Aramaic");
      break;
    case Script::AVESTAN:
      aFontList.AppendElement("Noto Sans Avestan");
      break;
    case Script::CHAKMA:
      aFontList.AppendElement("Noto Sans Chakma");
      break;
    case Script::KAITHI:
      aFontList.AppendElement("Noto Sans Kaithi");
      break;
    case Script::MANICHAEAN:
      aFontList.AppendElement("Noto Sans Manichaean");
      break;
    case Script::INSCRIPTIONAL_PAHLAVI:
      aFontList.AppendElement("Noto Sans Inscriptional Pahlavi");
      break;
    case Script::PSALTER_PAHLAVI:
      aFontList.AppendElement("Noto Sans Psalter Pahlavi");
      break;
    case Script::INSCRIPTIONAL_PARTHIAN:
      aFontList.AppendElement("Noto Sans Inscriptional Parthian");
      break;
    case Script::SAMARITAN:
      aFontList.AppendElement("Noto Sans Samaritan");
      break;
    case Script::TAI_VIET:
      aFontList.AppendElement("Noto Sans Tai Viet");
      break;
    case Script::BAMUM:
      aFontList.AppendElement("Noto Sans Bamum");
      break;
    case Script::LISU:
      aFontList.AppendElement("Noto Sans Lisu");
      break;
    case Script::OLD_SOUTH_ARABIAN:
      aFontList.AppendElement("Noto Sans Old South Arabian");
      break;
    case Script::BASSA_VAH:
      aFontList.AppendElement("Noto Sans Bassa Vah");
      break;
    case Script::DUPLOYAN:
      aFontList.AppendElement("Noto Sans Duployan");
      break;
    case Script::ELBASAN:
      aFontList.AppendElement("Noto Sans Elbasan");
      break;
    case Script::GRANTHA:
      aFontList.AppendElement("Noto Sans Grantha");
      break;
    case Script::MENDE_KIKAKUI:
      aFontList.AppendElement("Noto Sans Mende Kikakui");
      break;
    case Script::MEROITIC_CURSIVE:
    case Script::MEROITIC_HIEROGLYPHS:
      aFontList.AppendElement("Noto Sans Meroitic");
      break;
    case Script::OLD_NORTH_ARABIAN:
      aFontList.AppendElement("Noto Sans Old North Arabian");
      break;
    case Script::NABATAEAN:
      aFontList.AppendElement("Noto Sans Nabataean");
      break;
    case Script::PALMYRENE:
      aFontList.AppendElement("Noto Sans Palmyrene");
      break;
    case Script::KHUDAWADI:
      aFontList.AppendElement("Noto Sans Khudawadi");
      break;
    case Script::WARANG_CITI:
      aFontList.AppendElement("Noto Sans Warang Citi");
      break;
    case Script::MRO:
      aFontList.AppendElement("Noto Sans Mro");
      break;
    case Script::SHARADA:
      aFontList.AppendElement("Noto Sans Sharada");
      break;
    case Script::SORA_SOMPENG:
      aFontList.AppendElement("Noto Sans Sora Sompeng");
      break;
    case Script::TAKRI:
      aFontList.AppendElement("Noto Sans Takri");
      break;
    case Script::KHOJKI:
      aFontList.AppendElement("Noto Sans Khojki");
      break;
    case Script::TIRHUTA:
      aFontList.AppendElement("Noto Sans Tirhuta");
      break;
    case Script::CAUCASIAN_ALBANIAN:
      aFontList.AppendElement("Noto Sans Caucasian Albanian");
      break;
    case Script::MAHAJANI:
      aFontList.AppendElement("Noto Sans Mahajani");
      break;
    case Script::AHOM:
      aFontList.AppendElement("Noto Serif Ahom");
      break;
    case Script::HATRAN:
      aFontList.AppendElement("Noto Sans Hatran");
      break;
    case Script::MODI:
      aFontList.AppendElement("Noto Sans Modi");
      break;
    case Script::MULTANI:
      aFontList.AppendElement("Noto Sans Multani");
      break;
    case Script::PAU_CIN_HAU:
      aFontList.AppendElement("Noto Sans Pau Cin Hau");
      break;
    case Script::SIDDHAM:
      aFontList.AppendElement("Noto Sans Siddham");
      break;
    case Script::ADLAM:
      aFontList.AppendElement("Noto Sans Adlam");
      break;
    case Script::BHAIKSUKI:
      aFontList.AppendElement("Noto Sans Bhaiksuki");
      break;
    case Script::MARCHEN:
      aFontList.AppendElement("Noto Sans Marchen");
      break;
    case Script::NEWA:
      aFontList.AppendElement("Noto Sans Newa");
      break;
    case Script::OSAGE:
      aFontList.AppendElement("Noto Sans Osage");
      break;
    case Script::HANIFI_ROHINGYA:
      aFontList.AppendElement("Noto Sans Hanifi Rohingya");
      break;
    case Script::WANCHO:
      aFontList.AppendElement("Noto Sans Wancho");
      break;
    case Script::ARABIC_NASTALIQ:
      aFontList.AppendElement("Noto Nastaliq Urdu");
      break;

    // Script codes for which no commonly-installed font is currently known.
    // Probably future macOS versions will add Noto fonts for many of these,
    // so we should watch for updates.
    case Script::OLD_CHURCH_SLAVONIC_CYRILLIC:
    case Script::DEMOTIC_EGYPTIAN:
    case Script::HIERATIC_EGYPTIAN:
    case Script::BLISSYMBOLS:
    case Script::CIRTH:
    case Script::KHUTSURI:
    case Script::HARAPPAN_INDUS:
    case Script::LATIN_FRAKTUR:
    case Script::LATIN_GAELIC:
    case Script::MAYAN_HIEROGLYPHS:
    case Script::RONGORONGO:
    case Script::SARATI:
    case Script::ESTRANGELO_SYRIAC:
    case Script::WESTERN_SYRIAC:
    case Script::EASTERN_SYRIAC:
    case Script::TENGWAR:
    case Script::VISIBLE_SPEECH:
    case Script::UNWRITTEN_LANGUAGES:
    case Script::UNKNOWN:
    case Script::SIGNWRITING:
    case Script::MOON:
    case Script::BOOK_PAHLAVI:
    case Script::NAKHI_GEBA:
    case Script::KPELLE:
    case Script::LOMA:
    case Script::AFAKA:
    case Script::JURCHEN:
    case Script::NUSHU:
    case Script::TANGUT:
    case Script::WOLEAI:
    case Script::ANATOLIAN_HIEROGLYPHS:
    case Script::MASARAM_GONDI:
    case Script::SOYOMBO:
    case Script::ZANABAZAR_SQUARE:
    case Script::DOGRA:
    case Script::GUNJALA_GONDI:
    case Script::MAKASAR:
    case Script::MEDEFAIDRIN:
    case Script::SOGDIAN:
    case Script::OLD_SOGDIAN:
    case Script::ELYMAIC:
    case Script::NYIAKENG_PUACHUE_HMONG:
    case Script::NANDINAGARI:
    case Script::CHORASMIAN:
    case Script::DIVES_AKURU:
    case Script::KHITAN_SMALL_SCRIPT:
    case Script::YEZIDI:
    case Script::CYPRO_MINOAN:
    case Script::OLD_UYGHUR:
    case Script::TANGSA:
    case Script::TOTO:
    case Script::VITHKUQI:
    case Script::KAWI:
    case Script::NAG_MUNDARI:
    case Script::GARAY:
    case Script::GURUNG_KHEMA:
    case Script::KIRAT_RAI:
    case Script::OL_ONAL:
    case Script::SUNUWAR:
    case Script::TODHRI:
    case Script::TULU_TIGALARI:
      break;
  }

  // Symbols/dingbats are generally Script=COMMON but may be resolved to any
  // surrounding script run. So we'll always append a couple of likely fonts
  // for such characters.
  const uint32_t b = aCh >> 8;
  if (aRunScript == Script::COMMON ||  // Stray COMMON chars not resolved
      (b >= 0x20 && b <= 0x2b) || b == 0x2e ||  // BMP symbols/punctuation/etc
      GetGenCategory(aCh) == nsUGenCategory::kSymbol ||
      GetGenCategory(aCh) == nsUGenCategory::kPunctuation) {
    if (b == 0x27) {
      aFontList.AppendElement("Zapf Dingbats");
    }
    aFontList.AppendElement("Geneva");
    aFontList.AppendElement("STIXGeneral");
    aFontList.AppendElement("Apple Symbols");
    // Japanese fonts also cover a lot of miscellaneous symbols
    aFontList.AppendElement("Hiragino Sans");
    aFontList.AppendElement("Hiragino Kaku Gothic ProN");
  }

  // Arial Unicode MS has lots of glyphs for obscure characters; try it as a
  // last resort.
  aFontList.AppendElement("Arial Unicode MS");
}

/*static*/
void gfxPlatformMac::LookupSystemFont(
    mozilla::LookAndFeel::FontID aSystemFontID, nsACString& aSystemFontName,
    gfxFontStyle& aFontStyle) {
  return PlatformFontListClass::LookupSystemFont(aSystemFontID, aSystemFontName,
                                                 aFontStyle);
}

uint32_t gfxPlatformMac::ReadAntiAliasingThreshold() {
  uint32_t threshold = 0;  // default == no threshold

  // first read prefs flag to determine whether to use the setting or not
  bool useAntiAliasingThreshold =
      Preferences::GetBool("gfx.use_text_smoothing_setting", false);

  // if the pref setting is disabled, return 0 which effectively disables this
  // feature
  if (!useAntiAliasingThreshold) return threshold;

  // value set via Appearance pref panel, "Turn off text smoothing for font
  // sizes xxx and smaller"
  CFNumberRef prefValue = (CFNumberRef)CFPreferencesCopyAppValue(
      CFSTR("AppleAntiAliasingThreshold"), kCFPreferencesCurrentApplication);

  if (prefValue) {
    if (!CFNumberGetValue(prefValue, kCFNumberIntType, &threshold)) {
      threshold = 0;
    }
    CFRelease(prefValue);
  }

  return threshold;
}

bool gfxPlatformMac::AccelerateLayersByDefault() { return true; }

#ifdef MOZ_WIDGET_COCOA
// This is the renderer output callback function, called on the vsync thread
static CVReturn VsyncCallback(CVDisplayLinkRef aDisplayLink,
                              const CVTimeStamp* aNow,
                              const CVTimeStamp* aOutputTime,
                              CVOptionFlags aFlagsIn, CVOptionFlags* aFlagsOut,
                              void* aDisplayLinkContext);

class OSXVsyncSource final : public VsyncSource {
public:
  OSXVsyncSource()
      : mDisplayLink(nullptr, "OSXVsyncSource::OSXDisplay::mDisplayLink") {
    MOZ_ASSERT(NS_IsMainThread());
    mTimer = NS_NewTimer();
    CGDisplayRegisterReconfigurationCallback(DisplayReconfigurationCallback,
                                             this);
  }

  virtual ~OSXVsyncSource() {
    MOZ_ASSERT(NS_IsMainThread());
    CGDisplayRemoveReconfigurationCallback(DisplayReconfigurationCallback,
                                           this);
  }

  static void RetryEnableVsync(nsITimer* aTimer, void* aOsxVsyncSource) {
    MOZ_ASSERT(NS_IsMainThread());
    OSXVsyncSource* osxVsyncSource =
        static_cast<OSXVsyncSource*>(aOsxVsyncSource);
    MOZ_ASSERT(osxVsyncSource);
    osxVsyncSource->EnableVsync();
  }

  void EnableVsync() override {
    MOZ_ASSERT(NS_IsMainThread());
    if (IsVsyncEnabled()) {
      return;
    }

    auto displayLink = mDisplayLink.Lock();

    // Create a display link capable of being used with all active displays
    // TODO: See if we need to create an active DisplayLink for each monitor
    // in multi-monitor situations. According to the docs, it is compatible
    // with all displays running on the computer But if we have different
    // monitors at different display rates, we may hit issues.
    CVReturn retval = CVDisplayLinkCreateWithActiveCGDisplays(&*displayLink);

    // Workaround for bug 1201401: CVDisplayLinkCreateWithCGDisplays()
    // (called by CVDisplayLinkCreateWithActiveCGDisplays()) sometimes
    // creates a CVDisplayLinkRef with an uninitialized (nulled) internal
    // pointer. If we continue to use this CVDisplayLinkRef, we will
    // eventually crash in CVCGDisplayLink::getDisplayTimes(), where the
    // internal pointer is dereferenced. Fortunately, when this happens
    // another internal variable is also left uninitialized (zeroed),
    // which is accessible via CVDisplayLinkGetCurrentCGDisplay(). In
    // normal conditions the current display is never zero.
    if ((retval == kCVReturnSuccess) &&
        (CVDisplayLinkGetCurrentCGDisplay(*displayLink) == 0)) {
      retval = kCVReturnInvalidDisplay;
    }

    if (retval != kCVReturnSuccess) {
      NS_WARNING(
          "Could not create a display link with all active displays. "
          "Retrying");
      CVDisplayLinkRelease(*displayLink);
      *displayLink = nullptr;

      // bug 1142708 - When coming back from sleep,
      // or when changing displays, active displays may not be ready yet,
      // even if listening for the kIOMessageSystemHasPoweredOn event
      // from OS X sleep notifications.
      // Active displays are those that are drawable.
      // bug 1144638 - When changing display configurations and getting
      // notifications from CGDisplayReconfigurationCallBack, the
      // callback gets called twice for each active display
      // so it's difficult to know when all displays are active.
      // Instead, try again soon. The delay is arbitrary. 100ms chosen
      // because on a late 2013 15" retina, it takes about that
      // long to come back up from sleep.
      uint32_t delay = 100;
      mTimer->InitWithNamedFuncCallback(RetryEnableVsync, this, delay,
                                        nsITimer::TYPE_ONE_SHOT,
                                        "RetryEnableVsync");
      return;
    }

    if (CVDisplayLinkSetOutputCallback(*displayLink, &VsyncCallback, this) !=
        kCVReturnSuccess) {
      NS_WARNING("Could not set displaylink output callback");
      CVDisplayLinkRelease(*displayLink);
      *displayLink = nullptr;
      return;
    }

    mPreviousTimestamp = TimeStamp::Now();
    if (CVDisplayLinkStart(*displayLink) != kCVReturnSuccess) {
      NS_WARNING("Could not activate the display link");
      CVDisplayLinkRelease(*displayLink);
      *displayLink = nullptr;
    }

    CVTime vsyncRate =
        CVDisplayLinkGetNominalOutputVideoRefreshPeriod(*displayLink);
    if (vsyncRate.flags & kCVTimeIsIndefinite) {
      NS_WARNING("Could not get vsync rate, setting to 60.");
      mVsyncRate = TimeDuration::FromMilliseconds(1000.0 / 60.0);
    } else {
      int64_t timeValue = vsyncRate.timeValue;
      int64_t timeScale = vsyncRate.timeScale;
      const int milliseconds = 1000;
      float rateInMs = ((double)timeValue / (double)timeScale) * milliseconds;
      mVsyncRate = TimeDuration::FromMilliseconds(rateInMs);
    }
  }

  void DisableVsync() override {
    MOZ_ASSERT(NS_IsMainThread());
    if (!IsVsyncEnabled()) {
      return;
    }

    // Release the display link
    auto displayLink = mDisplayLink.Lock();
    if (*displayLink) {
      CVDisplayLinkRelease(*displayLink);
      *displayLink = nullptr;
    }
  }

  bool IsVsyncEnabled() override {
    MOZ_ASSERT(NS_IsMainThread());
    auto displayLink = mDisplayLink.Lock();
    return *displayLink != nullptr;
  }

  TimeDuration GetVsyncRate() override { return mVsyncRate; }

  void Shutdown() override {
    MOZ_ASSERT(NS_IsMainThread());
    mTimer->Cancel();
    mTimer = nullptr;
    DisableVsync();
  }

  // The vsync timestamps given by the CVDisplayLinkCallback are
  // in the future for the NEXT frame. Large parts of Gecko, such
  // as animations assume a timestamp at either now or in the past.
  // Normalize the timestamps given to the VsyncDispatchers to the vsync
  // that just occured, not the vsync that is upcoming.
  TimeStamp mPreviousTimestamp;

private:
  static void DisplayReconfigurationCallback(CGDirectDisplayID aDisplay,
                                             CGDisplayChangeSummaryFlags aFlags,
                                             void* aUserInfo) {
    static_cast<OSXVsyncSource*>(aUserInfo)->OnDisplayReconfiguration(aDisplay,
                                                                      aFlags);
  }

  void OnDisplayReconfiguration(CGDirectDisplayID aDisplay,
                                CGDisplayChangeSummaryFlags aFlags) {
    // Display reconfiguration notifications are fired in two phases: Before
    // the reconfiguration and after the reconfiguration.
    // All displays are notified before (with a "BeginConfiguration" flag),
    // and the reconfigured displays are notified again after the
    // configuration.
    if (aFlags & kCGDisplayBeginConfigurationFlag) {
      // We're only interested in the "after" notification, for the display
      // link's current display.
      return;
    }

    if (!NS_IsMainThread()) {
      return;
    }

    bool didReconfigureCurrentDisplayLinkDisplay = false;
    {  // scope for lock
      auto displayLink = mDisplayLink.Lock();
      didReconfigureCurrentDisplayLinkDisplay =
          *displayLink &&
          CVDisplayLinkGetCurrentCGDisplay(*displayLink) == aDisplay;
    }

    if (didReconfigureCurrentDisplayLinkDisplay) {
      // The link's current display has been reconfigured.
      // Recreate the display link, because otherwise it may be stuck with a
      // "removed" display forever and never notify us again.
      DisableVsync();
      EnableVsync();
    }
  }

  // Accessed from main thread and from display reconfiguration callback
  // thread... which also happens to be the main thread.
  DataMutex<CVDisplayLinkRef> mDisplayLink;

  // Accessed only from the main thread.
  RefPtr<nsITimer> mTimer;
  TimeDuration mVsyncRate;
};  // OSXVsyncSource

static CVReturn VsyncCallback(CVDisplayLinkRef aDisplayLink,
                              const CVTimeStamp* aNow,
                              const CVTimeStamp* aOutputTime,
                              CVOptionFlags aFlagsIn, CVOptionFlags* aFlagsOut,
                              void* aDisplayLinkContext) {
  // Executed on OS X hardware vsync thread
  OSXVsyncSource* vsyncSource = (OSXVsyncSource*)aDisplayLinkContext;

  mozilla::TimeStamp outputTime =
      mozilla::TimeStamp::FromSystemTime(aOutputTime->hostTime);
  mozilla::TimeStamp nextVsync = outputTime;
  mozilla::TimeStamp previousVsync = vsyncSource->mPreviousTimestamp;
  mozilla::TimeStamp now = TimeStamp::Now();

  // Snow leopard sometimes sends vsync timestamps very far in the past.
  // Normalize the vsync timestamps to now.
  if (nextVsync <= previousVsync) {
    nextVsync = now;
    previousVsync = now;
  } else if (now < previousVsync) {
    // Bug 1158321 - The VsyncCallback can sometimes execute before the reported
    // vsync time. In those cases, normalize the timestamp to Now() as sending
    // timestamps in the future has undefined behavior. See the comment above
    // OSXVsyncSource::mPreviousTimestamp
    previousVsync = now;
  }

  vsyncSource->mPreviousTimestamp = nextVsync;

  vsyncSource->NotifyVsync(previousVsync, outputTime);
  return kCVReturnSuccess;
}
#endif

already_AddRefed<mozilla::gfx::VsyncSource>
gfxPlatformMac::CreateGlobalHardwareVsyncSource() {
#ifdef MOZ_WIDGET_COCOA
  RefPtr<VsyncSource> osxVsyncSource = new OSXVsyncSource();
  osxVsyncSource->EnableVsync();
  if (!osxVsyncSource->IsVsyncEnabled()) {
    NS_WARNING(
        "OS X Vsync source not enabled. Falling back to software vsync.");
    return GetSoftwareVsyncSource();
  }

  osxVsyncSource->DisableVsync();
  return osxVsyncSource.forget();
#else
  // TODO: CADisplayLink
  return GetSoftwareVsyncSource();
#endif
}

nsTArray<uint8_t> gfxPlatformMac::GetPlatformCMSOutputProfileData() {
  nsTArray<uint8_t> prefProfileData = GetPrefCMSOutputProfileData();
  if (!prefProfileData.IsEmpty()) {
    return prefProfileData;
  }

  CGColorSpaceRef cspace = nil;
#ifdef MOZ_WIDGET_COCOA
  cspace = ::CGDisplayCopyColorSpace(::CGMainDisplayID());
#endif
  if (!cspace) {
    cspace = ::CGColorSpaceCreateDeviceRGB();
  }
  if (!cspace) {
    return nsTArray<uint8_t>();
  }

  CFDataRef iccp = ::CGColorSpaceCopyICCData(cspace);

  ::CFRelease(cspace);

  if (!iccp) {
    return nsTArray<uint8_t>();
  }

  // copy to external buffer
  size_t size = static_cast<size_t>(::CFDataGetLength(iccp));

  nsTArray<uint8_t> result;

  if (size > 0) {
    result.AppendElements(::CFDataGetBytePtr(iccp), size);
  }

  ::CFRelease(iccp);

  return result;
}

bool gfxPlatformMac::CheckVariationFontSupport() { return true; }

void gfxPlatformMac::InitPlatformGPUProcessPrefs() {
  FeatureState& gpuProc = gfxConfig::GetFeature(Feature::GPU_PROCESS);
  gpuProc.ForceDisable(FeatureStatus::Blocked,
                       "GPU process does not work on Mac",
                       "FEATURE_FAILURE_MAC_GPU_PROC"_ns);
}

quality100%

¤ Dauer der Verarbeitung: 0.39 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.