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+/* -*- 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/. */
+
+#ifndef GFXFCPLATFORMFONTLIST_H_
+#define GFXFCPLATFORMFONTLIST_H_
+
+#include "gfxFT2FontBase.h"
+#include "gfxPlatformFontList.h"
+#include "mozilla/FontPropertyTypes.h"
+#include "mozilla/mozalloc.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/UniquePtr.h"
+#include "nsClassHashtable.h"
+#include "nsTHashMap.h"
+
+#include <fontconfig/fontconfig.h>
+#include "ft2build.h"
+#include FT_FREETYPE_H
+#include FT_TRUETYPE_TABLES_H
+#include FT_MULTIPLE_MASTERS_H
+
+#if defined(MOZ_SANDBOX) && defined(XP_LINUX)
+# include "mozilla/SandboxBroker.h"
+#endif
+
+namespace mozilla {
+namespace dom {
+class SystemFontListEntry;
+class SystemFontList;
+class SystemFontOptions;
+}; // namespace dom
+
+template <>
+class RefPtrTraits<FcPattern> {
+ public:
+ static void Release(FcPattern* ptr) { FcPatternDestroy(ptr); }
+ static void AddRef(FcPattern* ptr) { FcPatternReference(ptr); }
+};
+
+template <>
+class RefPtrTraits<FcConfig> {
+ public:
+ static void Release(FcConfig* ptr) { FcConfigDestroy(ptr); }
+ static void AddRef(FcConfig* ptr) { FcConfigReference(ptr); }
+};
+
+template <>
+class DefaultDelete<FcFontSet> {
+ public:
+ void operator()(FcFontSet* aPtr) { FcFontSetDestroy(aPtr); }
+};
+
+template <>
+class DefaultDelete<FcObjectSet> {
+ public:
+ void operator()(FcObjectSet* aPtr) { FcObjectSetDestroy(aPtr); }
+};
+
+}; // namespace mozilla
+
+// The names for the font entry and font classes should really
+// the common 'Fc' abbreviation but the gfxPangoFontGroup code already
+// defines versions of these, so use the verbose name for now.
+
+class gfxFontconfigFontEntry final : public gfxFT2FontEntryBase {
+ friend class gfxFcPlatformFontList;
+ using FTUserFontData = mozilla::gfx::FTUserFontData;
+
+ public:
+ // used for system fonts with explicit patterns
+ explicit gfxFontconfigFontEntry(const nsACString& aFaceName,
+ FcPattern* aFontPattern,
+ bool aIgnoreFcCharmap);
+
+ // used for data fonts where the fontentry takes ownership
+ // of the font data and the FT_Face
+ explicit gfxFontconfigFontEntry(const nsACString& aFaceName,
+ WeightRange aWeight, StretchRange aStretch,
+ SlantStyleRange aStyle,
+ RefPtr<mozilla::gfx::SharedFTFace>&& aFace);
+
+ // used for @font-face local system fonts with explicit patterns
+ explicit gfxFontconfigFontEntry(const nsACString& aFaceName,
+ FcPattern* aFontPattern, WeightRange aWeight,
+ StretchRange aStretch,
+ SlantStyleRange aStyle);
+
+ gfxFontEntry* Clone() const override;
+
+ FcPattern* GetPattern() { return mFontPattern; }
+
+ nsresult ReadCMAP(FontInfoData* aFontInfoData = nullptr) override;
+ bool TestCharacterMap(uint32_t aCh) override;
+
+ mozilla::gfx::SharedFTFace* GetFTFace();
+ FTUserFontData* GetUserFontData();
+
+ FT_MM_Var* GetMMVar() override;
+
+ bool HasVariations() override;
+ void GetVariationAxes(nsTArray<gfxFontVariationAxis>& aAxes) override;
+ void GetVariationInstances(
+ nsTArray<gfxFontVariationInstance>& aInstances) override;
+
+ bool HasFontTable(uint32_t aTableTag) override;
+ nsresult CopyFontTable(uint32_t aTableTag, nsTArray<uint8_t>&) override;
+ hb_blob_t* GetFontTable(uint32_t aTableTag) override;
+
+ double GetAspect(uint8_t aSizeAdjustBasis);
+
+ protected:
+ virtual ~gfxFontconfigFontEntry();
+
+ gfxFont* CreateFontInstance(const gfxFontStyle* aFontStyle) override;
+
+ void GetUserFontFeatures(FcPattern* aPattern);
+
+ // pattern for a single face of a family
+ RefPtr<FcPattern> mFontPattern;
+
+ // FTFace - initialized when needed. Once mFTFaceInitialized is true,
+ // the face can be accessed without locking.
+ // Note that mFTFace owns a reference to the SharedFTFace, but is not
+ // a RefPtr because we need it to be an atomic.
+ mozilla::Atomic<mozilla::gfx::SharedFTFace*> mFTFace;
+ mozilla::Atomic<bool> mFTFaceInitialized;
+
+ // Whether TestCharacterMap should check the actual cmap rather than asking
+ // fontconfig about character coverage.
+ // We do this for app-bundled (rather than system) fonts, as they may
+ // include color glyphs that fontconfig would overlook, and for fonts
+ // loaded via @font-face.
+ bool mIgnoreFcCharmap;
+
+ // Whether the face supports variations. For system-installed fonts, we
+ // query fontconfig for this (so they will only work if fontconfig is
+ // recent enough to include support); for downloaded user-fonts we query
+ // the FreeType face.
+ enum class HasVariationsState : int8_t {
+ Uninitialized = -1,
+ No = 0,
+ Yes = 1,
+ };
+ std::atomic<HasVariationsState> mHasVariations =
+ HasVariationsState::Uninitialized;
+
+ class UnscaledFontCache {
+ public:
+ already_AddRefed<mozilla::gfx::UnscaledFontFontconfig> Lookup(
+ const std::string& aFile, uint32_t aIndex);
+
+ void Add(
+ const RefPtr<mozilla::gfx::UnscaledFontFontconfig>& aUnscaledFont) {
+ mUnscaledFonts[kNumEntries - 1] = aUnscaledFont;
+ MoveToFront(kNumEntries - 1);
+ }
+
+ private:
+ void MoveToFront(size_t aIndex);
+
+ static const size_t kNumEntries = 3;
+ mozilla::ThreadSafeWeakPtr<mozilla::gfx::UnscaledFontFontconfig>
+ mUnscaledFonts[kNumEntries];
+ };
+
+ UnscaledFontCache mUnscaledFontCache;
+
+ // Because of FreeType bug 52955, we keep the FT_MM_Var struct when it is
+ // first loaded, rather than releasing it and re-fetching it as needed.
+ FT_MM_Var* mMMVar = nullptr;
+ bool mMMVarInitialized = false;
+};
+
+class gfxFontconfigFontFamily final : public gfxFontFamily {
+ public:
+ gfxFontconfigFontFamily(const nsACString& aName, FontVisibility aVisibility)
+ : gfxFontFamily(aName, aVisibility),
+ mContainsAppFonts(false),
+ mHasNonScalableFaces(false),
+ mForceScalable(false) {}
+
+ template <typename Func>
+ void AddFacesToFontList(Func aAddPatternFunc);
+
+ void FindStyleVariationsLocked(FontInfoData* aFontInfoData = nullptr)
+ MOZ_REQUIRES(mLock) override;
+
+ // Families are constructed initially with just references to patterns.
+ // When necessary, these are enumerated within FindStyleVariations.
+ void AddFontPattern(FcPattern* aFontPattern, bool aSingleName);
+
+ void SetFamilyContainsAppFonts(bool aContainsAppFonts) {
+ mContainsAppFonts = aContainsAppFonts;
+ }
+
+ void FindAllFontsForStyle(const gfxFontStyle& aFontStyle,
+ nsTArray<gfxFontEntry*>& aFontEntryList,
+ bool aIgnoreSizeTolerance) override;
+
+ bool FilterForFontList(nsAtom* aLangGroup,
+ const nsACString& aGeneric) const final {
+ return SupportsLangGroup(aLangGroup);
+ }
+
+ protected:
+ virtual ~gfxFontconfigFontFamily();
+
+ // helper for FilterForFontList
+ bool SupportsLangGroup(nsAtom* aLangGroup) const;
+
+ nsTArray<RefPtr<FcPattern>> mFontPatterns;
+
+ // Number of faces that have a single name. Faces that have multiple names are
+ // sorted last.
+ uint32_t mUniqueNameFaceCount = 0;
+ bool mContainsAppFonts : 1;
+ bool mHasNonScalableFaces : 1;
+ bool mForceScalable : 1;
+};
+
+class gfxFontconfigFont final : public gfxFT2FontBase {
+ public:
+ gfxFontconfigFont(
+ const RefPtr<mozilla::gfx::UnscaledFontFontconfig>& aUnscaledFont,
+ RefPtr<mozilla::gfx::SharedFTFace>&& aFTFace, FcPattern* aPattern,
+ gfxFloat aAdjustedSize, gfxFontEntry* aFontEntry,
+ const gfxFontStyle* aFontStyle, int aLoadFlags, bool aEmbolden);
+
+ FontType GetType() const override { return FONT_TYPE_FONTCONFIG; }
+ FcPattern* GetPattern() const { return mPattern; }
+
+ already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont(
+ const TextRunDrawParams& aRunParams) override;
+
+ bool ShouldHintMetrics() const override;
+
+ private:
+ ~gfxFontconfigFont() override;
+
+ RefPtr<FcPattern> mPattern;
+};
+
+class gfxFcPlatformFontList final : public gfxPlatformFontList {
+ using FontPatternListEntry = mozilla::dom::SystemFontListEntry;
+
+ public:
+ gfxFcPlatformFontList();
+
+ static gfxFcPlatformFontList* PlatformFontList() {
+ return static_cast<gfxFcPlatformFontList*>(
+ gfxPlatformFontList::PlatformFontList());
+ }
+
+ // initialize font lists
+ nsresult InitFontListForPlatform() MOZ_REQUIRES(mLock) override;
+ void InitSharedFontListForPlatform() MOZ_REQUIRES(mLock) override;
+
+ void GetFontList(nsAtom* aLangGroup, const nsACString& aGenericFamily,
+ nsTArray<nsString>& aListOfFonts) override;
+
+ void ReadSystemFontList(mozilla::dom::SystemFontList*);
+
+ gfxFontEntry* CreateFontEntry(
+ mozilla::fontlist::Face* aFace,
+ const mozilla::fontlist::Family* aFamily) override;
+
+ gfxFontEntry* LookupLocalFont(nsPresContext* aPresContext,
+ const nsACString& aFontName,
+ WeightRange aWeightForEntry,
+ StretchRange aStretchForEntry,
+ SlantStyleRange aStyleForEntry) override;
+
+ gfxFontEntry* MakePlatformFont(const nsACString& aFontName,
+ WeightRange aWeightForEntry,
+ StretchRange aStretchForEntry,
+ SlantStyleRange aStyleForEntry,
+ const uint8_t* aFontData,
+ uint32_t aLength) override;
+
+ bool FindAndAddFamiliesLocked(
+ nsPresContext* aPresContext, mozilla::StyleGenericFontFamily aGeneric,
+ const nsACString& aFamily, nsTArray<FamilyAndGeneric>* aOutput,
+ FindFamiliesFlags aFlags, gfxFontStyle* aStyle = nullptr,
+ nsAtom* aLanguage = nullptr, gfxFloat aDevToCssSize = 1.0)
+ MOZ_REQUIRES(mLock) override;
+
+ bool GetStandardFamilyName(const nsCString& aFontName,
+ nsACString& aFamilyName) override;
+
+ FcConfig* GetLastConfig() const { return mLastConfig; }
+
+ // override to use fontconfig lookup for generics
+ void AddGenericFonts(nsPresContext* aPresContext,
+ mozilla::StyleGenericFontFamily, nsAtom* aLanguage,
+ nsTArray<FamilyAndGeneric>& aFamilyList) override;
+
+ void ClearLangGroupPrefFontsLocked() MOZ_REQUIRES(mLock) override;
+
+ // clear out cached generic-lang ==> family-list mappings
+ void ClearGenericMappings() {
+ AutoLock lock(mLock);
+ ClearGenericMappingsLocked();
+ }
+ void ClearGenericMappingsLocked() MOZ_REQUIRES(mLock) {
+ mGenericMappings.Clear();
+ }
+
+ // map lang group ==> lang string
+ // When aForFontEnumerationThread is true, this method will avoid using
+ // LanguageService::LookupLanguage, because it is not safe for off-main-
+ // thread use (except by stylo traversal, which does the necessary locking)
+ void GetSampleLangForGroup(nsAtom* aLanguage, nsACString& aLangStr,
+ bool aForFontEnumerationThread = false);
+
+ protected:
+ virtual ~gfxFcPlatformFontList();
+
+#if defined(MOZ_SANDBOX) && defined(XP_LINUX)
+ typedef mozilla::SandboxBroker::Policy SandboxPolicy;
+#else
+ // Dummy type just so we can still have a SandboxPolicy* parameter.
+ struct SandboxPolicy {};
+#endif
+
+ // Add all the font families found in a font set.
+ // aAppFonts indicates whether this is the system or application fontset.
+ void AddFontSetFamilies(FcFontSet* aFontSet, const SandboxPolicy* aPolicy,
+ bool aAppFonts) MOZ_REQUIRES(mLock);
+
+ // Helper for above, to add a single font pattern.
+ void AddPatternToFontList(FcPattern* aFont, FcChar8*& aLastFamilyName,
+ nsACString& aFamilyName,
+ RefPtr<gfxFontconfigFontFamily>& aFontFamily,
+ bool aAppFonts) MOZ_REQUIRES(mLock);
+
+ // figure out which families fontconfig maps a generic to
+ // (aGeneric assumed already lowercase)
+ PrefFontList* FindGenericFamilies(nsPresContext* aPresContext,
+ const nsCString& aGeneric,
+ nsAtom* aLanguage) MOZ_REQUIRES(mLock);
+
+ // are all pref font settings set to use fontconfig generics?
+ bool PrefFontListsUseOnlyGenerics() MOZ_REQUIRES(mLock);
+
+ static void CheckFontUpdates(nsITimer* aTimer, void* aThis);
+
+ FontFamily GetDefaultFontForPlatform(nsPresContext* aPresContext,
+ const gfxFontStyle* aStyle,
+ nsAtom* aLanguage = nullptr)
+ MOZ_REQUIRES(mLock) override;
+
+ enum class DistroID : int8_t {
+ Unknown = 0,
+ Ubuntu = 1,
+ Fedora = 2,
+ // To be extended with any distros that ship a useful base set of fonts
+ // that we want to explicitly support.
+ };
+ DistroID GetDistroID() const; // -> DistroID::Unknown if we can't tell
+
+ FontVisibility GetVisibilityForFamily(const nsACString& aName) const;
+
+ gfxFontFamily* CreateFontFamily(const nsACString& aName,
+ FontVisibility aVisibility) const override;
+
+ // helper method for finding an appropriate lang string
+ bool TryLangForGroup(const nsACString& aOSLang, nsAtom* aLangGroup,
+ nsACString& aLang, bool aForFontEnumerationThread);
+
+#ifdef MOZ_BUNDLED_FONTS
+ void ActivateBundledFonts();
+ nsCString mBundledFontsPath;
+ bool mBundledFontsInitialized;
+#endif
+
+ // to avoid enumerating all fonts, maintain a mapping of local font
+ // names to family
+ nsTHashMap<nsCString, RefPtr<FcPattern>> mLocalNames;
+
+ // caching generic/lang ==> font family list
+ nsClassHashtable<nsCStringHashKey, PrefFontList> mGenericMappings;
+
+ // Caching family lookups as found by FindAndAddFamilies after resolving
+ // substitutions. The gfxFontFamily objects cached here are owned by the
+ // gfxFcPlatformFontList via its mFamilies table; note that if the main
+ // font list is rebuilt (e.g. due to a fontconfig configuration change),
+ // these pointers will be invalidated. InitFontList() flushes the cache
+ // in this case.
+ nsTHashMap<nsCStringHashKey, nsTArray<FamilyAndGeneric>> mFcSubstituteCache;
+
+ nsCOMPtr<nsITimer> mCheckFontUpdatesTimer;
+ RefPtr<FcConfig> mLastConfig;
+
+ // The current system font options in effect.
+#ifdef MOZ_WIDGET_GTK
+ // NOTE(emilio): This is a *system cairo* cairo_font_options_t object. As
+ // such, it can't be used outside of the few functions defined here.
+ cairo_font_options_t* mSystemFontOptions = nullptr;
+ int32_t mFreetypeLcdSetting = -1; // -1 for not set
+
+ void ClearSystemFontOptions();
+
+ // Returns whether options actually changed.
+ // TODO(emilio): We could call this when gsettings change or such, but
+ // historically we haven't reacted to these settings changes, so keeping it
+ // simple for now.
+ bool UpdateSystemFontOptions();
+
+ void UpdateSystemFontOptionsFromIpc(const mozilla::dom::SystemFontOptions&);
+ void SystemFontOptionsToIpc(mozilla::dom::SystemFontOptions&);
+
+ public:
+ void SubstituteSystemFontOptions(FcPattern*);
+
+ private:
+#endif
+
+ // Cache for most recently used language code in FindAndAddFamiliesLocked,
+ // and the result of checking whether to use lang-specific lookups.
+ RefPtr<nsAtom> mPrevLanguage;
+ nsCString mSampleLang;
+ bool mUseCustomLookups = false;
+
+ // By default, font prefs under Linux are set to simply lookup
+ // via fontconfig the appropriate font for serif/sans-serif/monospace.
+ // Rather than check each time a font pref is used, check them all at startup
+ // and set a boolean to flag the case that non-default user font prefs exist
+ // Note: langGroup == x-math is handled separately
+ bool mAlwaysUseFontconfigGenerics;
+
+ static FT_Library sFTLibrary;
+};
+
+#endif /* GFXPLATFORMFONTLIST_H_ */