gfx/thebes/gfxFT2FontList.h

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef GFX_FT2FONTLIST_H
   7 #define GFX_FT2FONTLIST_H
   8
   9 #include "mozilla/MemoryReporting.h"
  10 #include "gfxFT2FontBase.h"
  11 #include "gfxPlatformFontList.h"
  12 #include "nsTHashSet.h"
  13
  14 namespace mozilla {
  15 namespace dom {
  16 class SystemFontListEntry;
  17 };
  18 namespace gfx {
  19 class FTUserFontData;
  20 };
  21 };  // namespace mozilla
  22
  23 class FontNameCache;
  24 typedef struct FT_FaceRec_* FT_Face;
  25 class nsZipArchive;
  26 class WillShutdownObserver;
  27
  28 class FT2FontEntry final : public gfxFT2FontEntryBase {
  29   friend class gfxFT2FontList;
  30
  31   using FontListEntry = mozilla::dom::SystemFontListEntry;
  32   using FTUserFontData = mozilla::gfx::FTUserFontData;
  33
  34  public:
  35   explicit FT2FontEntry(const nsACString& aFaceName)
  36       : gfxFT2FontEntryBase(aFaceName), mFTFontIndex(0) {}
  37
  38   ~FT2FontEntry();
  39
  40   gfxFontEntry* Clone() const override;
  41
  42   const nsCString& GetName() const { return Name(); }
  43
  44   // create a font entry for a downloaded font
  45   static FT2FontEntry* CreateFontEntry(
  46       const nsACString& aFontName, WeightRange aWeight, StretchRange aStretch,
  47       SlantStyleRange aStyle, const uint8_t* aFontData, uint32_t aLength);
  48
  49   // create a font entry representing an installed font, identified by
  50   // a FontListEntry; the freetype and cairo faces will not be instantiated
  51   // until actually needed
  52   static FT2FontEntry* CreateFontEntry(const FontListEntry& aFLE);
  53
  54   // Create a font entry with the given name; if it is an installed font,
  55   // also record the filename and index.
  56   // If a non-null harfbuzz face is passed, also set style/weight/stretch
  57   // properties of the entry from the values in the face.
  58   static FT2FontEntry* CreateFontEntry(const nsACString& aName,
  59                                        const char* aFilename, uint8_t aIndex,
  60                                        const hb_face_t* aFace);
  61
  62   gfxFont* CreateFontInstance(const gfxFontStyle* aStyle) override;
  63
  64   nsresult ReadCMAP(FontInfoData* aFontInfoData = nullptr) override;
  65
  66   hb_blob_t* GetFontTable(uint32_t aTableTag) override;
  67
  68   bool HasFontTable(uint32_t aTableTag) override;
  69   nsresult CopyFontTable(uint32_t aTableTag, nsTArray<uint8_t>&) override;
  70
  71   bool HasVariations() override;
  72   void GetVariationAxes(
  73       nsTArray<gfxFontVariationAxis>& aVariationAxes) override;
  74   void GetVariationInstances(
  75       nsTArray<gfxFontVariationInstance>& aInstances) override;
  76
  77   // Check for various kinds of brokenness, and set flags on the entry
  78   // accordingly so that we avoid using bad font tables
  79   void CheckForBrokenFont(gfxFontFamily* aFamily);
  80   void CheckForBrokenFont(const nsACString& aFamilyKey);
  81
  82   already_AddRefed<mozilla::gfx::SharedFTFace> GetFTFace(bool aCommit = false);
  83   FTUserFontData* GetUserFontData();
  84
  85   FT_MM_Var* GetMMVar() override;
  86
  87   // Get a harfbuzz face for this font, if possible. The caller is responsible
  88   // to destroy the face when no longer needed.
  89   // This may be a bit expensive, so avoid calling multiple times if the same
  90   // face can be re-used for several purposes instead.
  91   hb_face_t* CreateHBFace() const;
  92
  93   /**
  94    * Append this face's metadata to aFaceList for storage in the FontNameCache
  95    * (for faster startup).
  96    * The aPSName and aFullName parameters here can in principle be empty,
  97    * but if they are missing for a given face then src:local() lookups will
  98    * not be able to find it when the shared font list is in use.
  99    */
 100   void AppendToFaceList(nsCString& aFaceList, const nsACString& aFamilyName,
 101                         const nsACString& aPSName, const nsACString& aFullName,
 102                         FontVisibility aVisibility);
 103
 104   void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
 105                               FontListSizes* aSizes) const override;
 106   void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
 107                               FontListSizes* aSizes) const override;
 108
 109   // Strong reference (addref'd), but held in an atomic ptr rather than a
 110   // normal RefPtr.
 111   mozilla::Atomic<mozilla::gfx::SharedFTFace*> mFTFace;
 112
 113   FT_MM_Var* mMMVar = nullptr;
 114
 115   nsCString mFilename;
 116   uint8_t mFTFontIndex;
 117
 118   mozilla::ThreadSafeWeakPtr<mozilla::gfx::UnscaledFontFreeType> mUnscaledFont;
 119
 120   nsTHashSet<uint32_t> mAvailableTables;
 121
 122   enum class HasVariationsState : int8_t {
 123     Uninitialized = -1,
 124     No = 0,
 125     Yes = 1,
 126   };
 127   std::atomic<HasVariationsState> mHasVariations =
 128       HasVariationsState::Uninitialized;
 129
 130   bool mMMVarInitialized = false;
 131 };
 132
 133 class FT2FontFamily final : public gfxFontFamily {
 134   using FontListEntry = mozilla::dom::SystemFontListEntry;
 135
 136  public:
 137   explicit FT2FontFamily(const nsACString& aName, FontVisibility aVisibility)
 138       : gfxFontFamily(aName, aVisibility) {}
 139
 140   // Append this family's faces to the IPC fontlist
 141   void AddFacesToFontList(nsTArray<FontListEntry>* aFontList);
 142
 143   void FinalizeMemberList(bool aSortFaces);
 144 };
 145
 146 class gfxFT2FontList final : public gfxPlatformFontList {
 147   using FontListEntry = mozilla::dom::SystemFontListEntry;
 148
 149  public:
 150   gfxFT2FontList();
 151   virtual ~gfxFT2FontList();
 152
 153   gfxFontEntry* CreateFontEntry(
 154       mozilla::fontlist::Face* aFace,
 155       const mozilla::fontlist::Family* aFamily) override;
 156
 157   gfxFontEntry* LookupLocalFont(nsPresContext* aPresContext,
 158                                 const nsACString& aFontName,
 159                                 WeightRange aWeightForEntry,
 160                                 StretchRange aStretchForEntry,
 161                                 SlantStyleRange aStyleForEntry) override;
 162
 163   gfxFontEntry* MakePlatformFont(const nsACString& aFontName,
 164                                  WeightRange aWeightForEntry,
 165                                  StretchRange aStretchForEntry,
 166                                  SlantStyleRange aStyleForEntry,
 167                                  const uint8_t* aFontData,
 168                                  uint32_t aLength) override;
 169
 170   void WriteCache();
 171
 172   void ReadSystemFontList(mozilla::dom::SystemFontList*);
 173
 174   static gfxFT2FontList* PlatformFontList() {
 175     return static_cast<gfxFT2FontList*>(
 176         gfxPlatformFontList::PlatformFontList());
 177   }
 178
 179   gfxFontFamily* CreateFontFamily(const nsACString& aName,
 180                                   FontVisibility aVisibility) const override;
 181
 182   void WillShutdown();
 183
 184  protected:
 185   typedef enum { kUnknown, kStandard } StandardFile;
 186
 187   // initialize font lists
 188   nsresult InitFontListForPlatform() MOZ_REQUIRES(mLock) override;
 189
 190   FontVisibility GetVisibilityForFamily(const nsACString& aName) const;
 191
 192   void AppendFaceFromFontListEntry(const FontListEntry& aFLE,
 193                                    StandardFile aStdFile) MOZ_REQUIRES(mLock);
 194
 195   void AppendFacesFromBlob(const nsCString& aFileName, StandardFile aStdFile,
 196                            hb_blob_t* aBlob, FontNameCache* aCache,
 197                            uint32_t aTimestamp, uint32_t aFilesize)
 198       MOZ_REQUIRES(mLock);
 199
 200   void AppendFacesFromFontFile(const nsCString& aFileName,
 201                                FontNameCache* aCache, StandardFile aStdFile)
 202       MOZ_REQUIRES(mLock);
 203
 204   void AppendFacesFromOmnijarEntry(nsZipArchive* aReader,
 205                                    const nsCString& aEntryName,
 206                                    FontNameCache* aCache, bool aJarChanged)
 207       MOZ_REQUIRES(mLock);
 208
 209   void InitSharedFontListForPlatform() MOZ_REQUIRES(mLock) override;
 210   void CollectInitData(const FontListEntry& aFLE, const nsCString& aPSName,
 211                        const nsCString& aFullName, StandardFile aStdFile);
 212
 213   /**
 214    * Callback passed to AppendFacesFromCachedFaceList to collect family/face
 215    * information in either the unshared or shared list we're building.
 216    */
 217   typedef void (*CollectFunc)(const FontListEntry& aFLE,
 218                               const nsCString& aPSName,
 219                               const nsCString& aFullName,
 220                               StandardFile aStdFile);
 221
 222   /**
 223    * Append faces from the face-list record for a specific file.
 224    * aCollectFace is a callback that will store the face(s) in either the
 225    * unshared mFontFamilies list or the mFamilyInitData/mFaceInitData tables
 226    * that will be used to initialize the shared list.
 227    * Returns true if it is able to read at least one face entry; false if no
 228    * usable face entry was found.
 229    */
 230   bool AppendFacesFromCachedFaceList(CollectFunc aCollectFace,
 231                                      const nsCString& aFileName,
 232                                      const nsCString& aFaceList,
 233                                      StandardFile aStdFile) MOZ_REQUIRES(mLock);
 234
 235   void AddFaceToList(const nsCString& aEntryName, uint32_t aIndex,
 236                      StandardFile aStdFile, hb_face_t* aFace,
 237                      nsCString& aFaceList) MOZ_REQUIRES(mLock);
 238
 239   void FindFonts() MOZ_REQUIRES(mLock);
 240
 241   void FindFontsInOmnijar(FontNameCache* aCache) MOZ_REQUIRES(mLock);
 242
 243   void FindFontsInDir(const nsCString& aDir, FontNameCache* aFNC)
 244       MOZ_REQUIRES(mLock);
 245
 246   FontFamily GetDefaultFontForPlatform(nsPresContext* aPresContext,
 247                                        const gfxFontStyle* aStyle,
 248                                        nsAtom* aLanguage = nullptr)
 249       MOZ_REQUIRES(mLock) override;
 250
 251   nsTHashSet<nsCString> mSkipSpaceLookupCheckFamilies;
 252
 253  private:
 254   mozilla::UniquePtr<FontNameCache> mFontNameCache;
 255   int64_t mJarModifiedTime;
 256   RefPtr<WillShutdownObserver> mObserver;
 257
 258   nsTArray<mozilla::fontlist::Family::InitData> mFamilyInitData;
 259   nsClassHashtable<nsCStringHashKey,
 260                    nsTArray<mozilla::fontlist::Face::InitData>>
 261       mFaceInitData;
 262 };
 263
 264 #endif /* GFX_FT2FONTLIST_H */