gfx/thebes/gfxAndroidPlatform.cpp
author Gurzau Raul <rgurzau@mozilla.com>
Sat, 25 May 2019 09:07:49 +0300
changeset 475564 af54b2de7028db03f42207598f7a0b4ba81e262f
parent 475527 75b04de7e99cab7bed5cc8b0f2f6d52ddf174bf3
child 475617 1d93849062870a8d492eeef2150ecea174cb6223
permissions -rw-r--r--
Backed out 31 changesets (bug 1552643, bug 1550422) for xpcshell crash on a CLOSED TREE. Backed out changeset e30c1aa75529 (bug 1552643) Backed out changeset caadcd7e02d3 (bug 1552643) Backed out changeset aa7086ab09be (bug 1552643) Backed out changeset 0b4029671710 (bug 1550422) Backed out changeset a16295296035 (bug 1550422) Backed out changeset 3b70307c0db5 (bug 1550422) Backed out changeset 69df7818d4a3 (bug 1550422) Backed out changeset d98dfc565927 (bug 1550422) Backed out changeset 6f0997976944 (bug 1550422) Backed out changeset 0edd264464c2 (bug 1550422) Backed out changeset 9ea6da7a74ec (bug 1550422) Backed out changeset f855f9309c8b (bug 1550422) Backed out changeset 1033546224a7 (bug 1550422) Backed out changeset ade7384c6186 (bug 1550422) Backed out changeset 75b04de7e99c (bug 1550422) Backed out changeset 91c3acdb2454 (bug 1550422) Backed out changeset 77d2f80257d1 (bug 1550422) Backed out changeset e0cd10d35327 (bug 1550422) Backed out changeset 097091082423 (bug 1550422) Backed out changeset 2f328853c1ab (bug 1550422) Backed out changeset f92f2cc29cb1 (bug 1550422) Backed out changeset 6dc82f88333d (bug 1550422) Backed out changeset c20f66494d69 (bug 1550422) Backed out changeset 2ba22cddeb6f (bug 1550422) Backed out changeset 3aa72f89e295 (bug 1550422) Backed out changeset ab4c4e806977 (bug 1550422) Backed out changeset 72e5de040dda (bug 1550422) Backed out changeset 7d3c2d486706 (bug 1550422) Backed out changeset 132e0b8d8468 (bug 1550422) Backed out changeset 54c85ac75dd0 (bug 1550422) Backed out changeset d7ba4a18dd54 (bug 1550422)

/* -*- 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/CountingAllocatorBase.h"
#include "mozilla/intl/LocaleService.h"
#include "mozilla/intl/OSPreferences.h"
#include "mozilla/Preferences.h"

#include "gfx2DGlue.h"
#include "gfxFT2FontList.h"
#include "gfxImageSurface.h"
#include "gfxTextRun.h"
#include "nsXULAppAPI.h"
#include "nsIScreen.h"
#include "nsIScreenManager.h"
#include "nsServiceManagerUtils.h"
#include "nsUnicodeProperties.h"
#include "gfxPrefs.h"
#include "cairo.h"
#include "VsyncSource.h"

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

#include "GeneratedJNINatives.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)

template <>
CountingAllocatorBase<FreetypeReporter>::AmountType
    CountingAllocatorBase<FreetypeReporter>::sAmount(0);

static FT_MemoryRec_ sFreetypeMemoryRecord;

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());

  mOffscreenFormat = GetScreenDepth() == 16 ? SurfaceFormat::R5G6B5_UINT16
                                            : SurfaceFormat::X8R8G8B8_UINT32;

  if (gfxPrefs::AndroidRGB16Force()) {
    mOffscreenFormat = SurfaceFormat::R5G6B5_UINT16;
  }
}

gfxAndroidPlatform::~gfxAndroidPlatform() {
  FT_Done_Library(gPlatformFTLibrary);
  gPlatformFTLibrary = nullptr;
}

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()->GetAppLocaleAsLangTag(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, uint32_t aNextCh, Script aRunScript,
    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";

  EmojiPresentation emoji = GetEmojiPresentation(aCh);
  if (emoji != EmojiPresentation::TextOnly) {
    if (aNextCh == kVariationSelector16 ||
        (aNextCh != kVariationSelector15 &&
         emoji == EmojiPresentation::EmojiDefault)) {
      // if char is followed by VS16, try for a color emoji glyph
      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("Droid Sans Devanagari");
        break;
      case 0x0b:
        aFontList.AppendElement("Noto Sans Tamil");
        aFontList.AppendElement("Droid Sans Tamil");
        break;
      case 0x0e:
        aFontList.AppendElement("Noto Sans Thai");
        aFontList.AppendElement("Droid Sans Thai");
        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");
}

void gfxAndroidPlatform::GetSystemFontList(
    InfallibleTArray<FontListEntry>* retValue) {
  gfxFT2FontList::PlatformFontList()->GetSystemFontList(retValue);
}

gfxPlatformFontList* gfxAndroidPlatform::CreatePlatformFontList() {
  gfxPlatformFontList* list = new gfxFT2FontList();
  if (NS_SUCCEEDED(list->InitFontList())) {
    return list;
  }
  gfxPlatformFontList::Shutdown();
  return nullptr;
}

gfxFontGroup* gfxAndroidPlatform::CreateFontGroup(
    const FontFamilyList& aFontFamilyList, const gfxFontStyle* aStyle,
    gfxTextPerfMetrics* aTextPerf, gfxUserFontSet* aUserFontSet,
    gfxFloat aDevToCssSize) {
  return new gfxFontGroup(aFontFamilyList, aStyle, aTextPerf, aUserFontSet,
                          aDevToCssSize);
}

FT_Library gfxAndroidPlatform::GetFTLibrary() { return gPlatformFTLibrary; }

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.
  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();
}

class AndroidVsyncSource final : public VsyncSource {
 public:
  class JavaVsyncSupport final
      : public java::VsyncSource::Natives<JavaVsyncSupport> {
   public:
    using Base = java::VsyncSource::Natives<JavaVsyncSupport>;
    using Base::DisposeNative;

    static void NotifyVsync() {
      GetDisplayInstance().NotifyVsync(TimeStamp::Now());
    }
  };

  class Display final : public VsyncSource::Display {
   public:
    Display()
        : mJavaVsync(java::VsyncSource::INSTANCE()), mObservingVsync(false) {
      JavaVsyncSupport::Init();  // To register native methods.
    }

    ~Display() { DisableVsync(); }

    bool IsVsyncEnabled() override {
      MOZ_ASSERT(NS_IsMainThread());
      MOZ_ASSERT(mJavaVsync);

      return mObservingVsync;
    }

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

      if (mObservingVsync) {
        return;
      }
      bool ok = mJavaVsync->ObserveVsync(true);
      if (ok && !mVsyncDuration) {
        float fps = mJavaVsync->GetRefreshRate();
        mVsyncDuration = TimeDuration::FromMilliseconds(1000.0 / fps);
      }
      mObservingVsync = ok;
      MOZ_ASSERT(mObservingVsync);
    }

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

      if (!mObservingVsync) {
        return;
      }
      mObservingVsync = mJavaVsync->ObserveVsync(false);
      MOZ_ASSERT(!mObservingVsync);
    }

    TimeDuration GetVsyncRate() override { return mVsyncDuration; }

    void Shutdown() override {
      DisableVsync();
      mJavaVsync = nullptr;
    }

   private:
    java::VsyncSource::GlobalRef mJavaVsync;
    bool mObservingVsync;
    TimeDuration mVsyncDuration;
  };

  Display& GetGlobalDisplay() final { return GetDisplayInstance(); }

 private:
  virtual ~AndroidVsyncSource() = default;

  static Display& GetDisplayInstance() {
    static Display globalDisplay;
    return globalDisplay;
  }
};

already_AddRefed<mozilla::gfx::VsyncSource>
gfxAndroidPlatform::CreateHardwareVsyncSource() {
  // Vsync was introduced since JB (API 16~18) but inaccurate. Enable only for
  // KK (API 19) and later.
  if (AndroidBridge::Bridge() &&
      AndroidBridge::Bridge()->GetAPIVersion() >= 19) {
    RefPtr<AndroidVsyncSource> vsyncSource = new AndroidVsyncSource();
    return vsyncSource.forget();
  }

  NS_WARNING("Vsync not supported. Falling back to software vsync");
  return gfxPlatform::CreateHardwareVsyncSource();
}