/* -*- 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 "mozilla/Logging.h" #include "gfxFcPlatformFontList.h" #include "gfxFont.h" #include "gfxFontConstants.h" #include "gfxFontFamilyList.h" #include "gfxFT2Utils.h" #include "gfxPlatform.h" #include "mozilla/ArrayUtils.h" #include "mozilla/dom/ContentChild.h" #include "mozilla/dom/ContentParent.h" #include "mozilla/Preferences.h" #include "mozilla/Sprintf.h" #include "mozilla/StaticPrefs_gfx.h" #include "mozilla/TimeStamp.h" #include "nsGkAtoms.h" #include "nsUnicodeProperties.h" #include "nsDirectoryServiceUtils.h" #include "nsDirectoryServiceDefs.h" #include "nsAppDirectoryServiceDefs.h" #include "nsCharSeparatedTokenizer.h" #include "nsXULAppAPI.h" #include "SharedFontList-impl.h" #include "StandardFonts-linux.inc" #include "mozilla/gfx/HelpersCairo.h" #include #include #include #include #ifdef MOZ_WIDGET_GTK # include # include "gfxPlatformGtk.h" #endif #ifdef MOZ_X11 # include "mozilla/X11Util.h" #endif #if defined(MOZ_SANDBOX) && defined(XP_LINUX) # include "mozilla/SandboxBrokerPolicyFactory.h" # include "mozilla/SandboxSettings.h" #endif #include FT_MULTIPLE_MASTERS_H using namespace mozilla; using namespace mozilla::gfx; using namespace mozilla::unicode; #ifndef FC_POSTSCRIPT_NAME # define FC_POSTSCRIPT_NAME "postscriptname" /* String */ #endif #ifndef FC_VARIABLE # define FC_VARIABLE "variable" /* Bool */ #endif #define PRINTING_FC_PROPERTY "gfx.printing" #define LOG_FONTLIST(args) \ MOZ_LOG(gfxPlatform::GetLog(eGfxLog_fontlist), LogLevel::Debug, args) #define LOG_FONTLIST_ENABLED() \ MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_fontlist), LogLevel::Debug) #define LOG_CMAPDATA_ENABLED() \ MOZ_LOG_TEST(gfxPlatform::GetLog(eGfxLog_cmapdata), LogLevel::Debug) static const FcChar8* ToFcChar8Ptr(const char* aStr) { return reinterpret_cast(aStr); } static const char* ToCharPtr(const FcChar8* aStr) { return reinterpret_cast(aStr); } // canonical name ==> first en name or first name if no en name // This is the required logic for fullname lookups as per CSS3 Fonts spec. static uint32_t FindCanonicalNameIndex(FcPattern* aFont, const char* aLangField) { uint32_t n = 0, en = 0; FcChar8* lang; while (FcPatternGetString(aFont, aLangField, n, &lang) == FcResultMatch) { // look for 'en' or variants, en-US, en-JP etc. uint32_t len = strlen(ToCharPtr(lang)); bool enPrefix = (strncmp(ToCharPtr(lang), "en", 2) == 0); if (enPrefix && (len == 2 || (len > 2 && aLangField[2] == '-'))) { en = n; break; } n++; } return en; } static void GetFaceNames(FcPattern* aFont, const nsACString& aFamilyName, nsACString& aPostscriptName, nsACString& aFullname) { // get the Postscript name FcChar8* psname; if (FcPatternGetString(aFont, FC_POSTSCRIPT_NAME, 0, &psname) == FcResultMatch) { aPostscriptName = ToCharPtr(psname); } // get the canonical fullname (i.e. en name or first name) uint32_t en = FindCanonicalNameIndex(aFont, FC_FULLNAMELANG); FcChar8* fullname; if (FcPatternGetString(aFont, FC_FULLNAME, en, &fullname) == FcResultMatch) { aFullname = ToCharPtr(fullname); } // if have fullname, done if (!aFullname.IsEmpty()) { return; } // otherwise, set the fullname to family + style name [en] and use that aFullname = aFamilyName; // figure out the en style name en = FindCanonicalNameIndex(aFont, FC_STYLELANG); nsAutoCString style; FcChar8* stylename = nullptr; FcPatternGetString(aFont, FC_STYLE, en, &stylename); if (stylename) { style = ToCharPtr(stylename); } if (!style.IsEmpty() && !style.EqualsLiteral("Regular")) { aFullname.Append(' '); aFullname.Append(style); } } static FontWeight MapFcWeight(int aFcWeight) { if (aFcWeight <= (FC_WEIGHT_THIN + FC_WEIGHT_EXTRALIGHT) / 2) { return FontWeight(100); } if (aFcWeight <= (FC_WEIGHT_EXTRALIGHT + FC_WEIGHT_LIGHT) / 2) { return FontWeight(200); } if (aFcWeight <= (FC_WEIGHT_LIGHT + FC_WEIGHT_BOOK) / 2) { return FontWeight(300); } if (aFcWeight <= (FC_WEIGHT_REGULAR + FC_WEIGHT_MEDIUM) / 2) { // This includes FC_WEIGHT_BOOK return FontWeight(400); } if (aFcWeight <= (FC_WEIGHT_MEDIUM + FC_WEIGHT_DEMIBOLD) / 2) { return FontWeight(500); } if (aFcWeight <= (FC_WEIGHT_DEMIBOLD + FC_WEIGHT_BOLD) / 2) { return FontWeight(600); } if (aFcWeight <= (FC_WEIGHT_BOLD + FC_WEIGHT_EXTRABOLD) / 2) { return FontWeight(700); } if (aFcWeight <= (FC_WEIGHT_EXTRABOLD + FC_WEIGHT_BLACK) / 2) { return FontWeight(800); } if (aFcWeight <= FC_WEIGHT_BLACK) { return FontWeight(900); } // including FC_WEIGHT_EXTRABLACK return FontWeight(901); } // TODO(emilio, jfkthame): I think this can now be more fine-grained. static FontStretch MapFcWidth(int aFcWidth) { if (aFcWidth <= (FC_WIDTH_ULTRACONDENSED + FC_WIDTH_EXTRACONDENSED) / 2) { return FontStretch::UltraCondensed(); } if (aFcWidth <= (FC_WIDTH_EXTRACONDENSED + FC_WIDTH_CONDENSED) / 2) { return FontStretch::ExtraCondensed(); } if (aFcWidth <= (FC_WIDTH_CONDENSED + FC_WIDTH_SEMICONDENSED) / 2) { return FontStretch::Condensed(); } if (aFcWidth <= (FC_WIDTH_SEMICONDENSED + FC_WIDTH_NORMAL) / 2) { return FontStretch::SemiCondensed(); } if (aFcWidth <= (FC_WIDTH_NORMAL + FC_WIDTH_SEMIEXPANDED) / 2) { return FontStretch::Normal(); } if (aFcWidth <= (FC_WIDTH_SEMIEXPANDED + FC_WIDTH_EXPANDED) / 2) { return FontStretch::SemiExpanded(); } if (aFcWidth <= (FC_WIDTH_EXPANDED + FC_WIDTH_EXTRAEXPANDED) / 2) { return FontStretch::Expanded(); } if (aFcWidth <= (FC_WIDTH_EXTRAEXPANDED + FC_WIDTH_ULTRAEXPANDED) / 2) { return FontStretch::ExtraExpanded(); } return FontStretch::UltraExpanded(); } static void GetFontProperties(FcPattern* aFontPattern, WeightRange* aWeight, StretchRange* aStretch, SlantStyleRange* aSlantStyle) { // weight int weight; if (FcPatternGetInteger(aFontPattern, FC_WEIGHT, 0, &weight) != FcResultMatch) { weight = FC_WEIGHT_REGULAR; } *aWeight = WeightRange(MapFcWeight(weight)); // width int width; if (FcPatternGetInteger(aFontPattern, FC_WIDTH, 0, &width) != FcResultMatch) { width = FC_WIDTH_NORMAL; } *aStretch = StretchRange(MapFcWidth(width)); // italic int slant; if (FcPatternGetInteger(aFontPattern, FC_SLANT, 0, &slant) != FcResultMatch) { slant = FC_SLANT_ROMAN; } if (slant == FC_SLANT_OBLIQUE) { *aSlantStyle = SlantStyleRange(FontSlantStyle::Oblique()); } else if (slant > 0) { *aSlantStyle = SlantStyleRange(FontSlantStyle::Italic()); } } gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsACString& aFaceName, FcPattern* aFontPattern, bool aIgnoreFcCharmap) : gfxFT2FontEntryBase(aFaceName), mFontPattern(aFontPattern), mFTFaceInitialized(false), mIgnoreFcCharmap(aIgnoreFcCharmap), mHasVariationsInitialized(false), mAspect(0.0) { GetFontProperties(aFontPattern, &mWeightRange, &mStretchRange, &mStyleRange); } gfxFontEntry* gfxFontconfigFontEntry::Clone() const { MOZ_ASSERT(!IsUserFont(), "we can only clone installed fonts!"); return new gfxFontconfigFontEntry(Name(), mFontPattern, mIgnoreFcCharmap); } static already_AddRefed CreatePatternForFace(FT_Face aFace) { // Use fontconfig to fill out the pattern from the FTFace. // The "file" argument cannot be nullptr (in fontconfig-2.6.0 at // least). The dummy file passed here is removed below. // // When fontconfig scans the system fonts, FcConfigGetBlanks(nullptr) // is passed as the "blanks" argument, which provides that unexpectedly // blank glyphs are elided. Here, however, we pass nullptr for // "blanks", effectively assuming that, if the font has a blank glyph, // then the author intends any associated character to be rendered // blank. RefPtr pattern = dont_AddRef(FcFreeTypeQueryFace(aFace, ToFcChar8Ptr(""), 0, nullptr)); // given that we have a FT_Face, not really sure this is possible... if (!pattern) { pattern = dont_AddRef(FcPatternCreate()); } FcPatternDel(pattern, FC_FILE); FcPatternDel(pattern, FC_INDEX); // Make a new pattern and store the face in it so that cairo uses // that when creating a cairo font face. FcPatternAddFTFace(pattern, FC_FT_FACE, aFace); return pattern.forget(); } static already_AddRefed CreateFaceForPattern( FcPattern* aPattern) { FcChar8* filename; if (FcPatternGetString(aPattern, FC_FILE, 0, &filename) != FcResultMatch) { return nullptr; } int index; if (FcPatternGetInteger(aPattern, FC_INDEX, 0, &index) != FcResultMatch) { index = 0; // default to 0 if not found in pattern } return Factory::NewSharedFTFace(nullptr, ToCharPtr(filename), index); } gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsACString& aFaceName, WeightRange aWeight, StretchRange aStretch, SlantStyleRange aStyle, RefPtr&& aFace) : gfxFT2FontEntryBase(aFaceName), mFTFace(std::move(aFace)), mFTFaceInitialized(true), mIgnoreFcCharmap(true), mHasVariationsInitialized(false), mAspect(0.0) { mWeightRange = aWeight; mStyleRange = aStyle; mStretchRange = aStretch; mIsDataUserFont = true; mFontPattern = CreatePatternForFace(mFTFace->GetFace()); } gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsACString& aFaceName, FcPattern* aFontPattern, WeightRange aWeight, StretchRange aStretch, SlantStyleRange aStyle) : gfxFT2FontEntryBase(aFaceName), mFontPattern(aFontPattern), mFTFaceInitialized(false), mHasVariationsInitialized(false), mAspect(0.0) { mWeightRange = aWeight; mStyleRange = aStyle; mStretchRange = aStretch; mIsLocalUserFont = true; // The proper setting of mIgnoreFcCharmap is tricky for fonts loaded // via src:local()... // If the local font happens to come from the application fontset, // we want to set it to true so that color/svg fonts will work even // if the default glyphs are blank; but if the local font is a non- // sfnt face (e.g. legacy type 1) then we need to set it to false // because our cmap-reading code will fail and we depend on FT+Fc to // determine the coverage. // We set the flag here, but may flip it the first time TestCharacterMap // is called, at which point we'll look to see whether a 'cmap' is // actually present in the font. mIgnoreFcCharmap = true; } typedef FT_Error (*GetVarFunc)(FT_Face, FT_MM_Var**); typedef FT_Error (*DoneVarFunc)(FT_Library, FT_MM_Var*); static GetVarFunc sGetVar; static DoneVarFunc sDoneVar; static bool sInitializedVarFuncs = false; static void InitializeVarFuncs() { if (sInitializedVarFuncs) { return; } sInitializedVarFuncs = true; #if MOZ_TREE_FREETYPE sGetVar = &FT_Get_MM_Var; sDoneVar = &FT_Done_MM_Var; #else sGetVar = (GetVarFunc)dlsym(RTLD_DEFAULT, "FT_Get_MM_Var"); sDoneVar = (DoneVarFunc)dlsym(RTLD_DEFAULT, "FT_Done_MM_Var"); #endif } gfxFontconfigFontEntry::~gfxFontconfigFontEntry() { if (mMMVar) { // Prior to freetype 2.9, there was no specific function to free the // FT_MM_Var record, and the docs just said to use free(). // InitializeVarFuncs must have been called in order for mMMVar to be // non-null here, so we don't need to do it again. if (sDoneVar) { MOZ_ASSERT(mFTFace, "How did mMMVar get set without a face?"); (*sDoneVar)(mFTFace->GetFace()->glyph->library, mMMVar); } else { free(mMMVar); } } } nsresult gfxFontconfigFontEntry::ReadCMAP(FontInfoData* aFontInfoData) { // attempt this once, if errors occur leave a blank cmap if (mCharacterMap) { return NS_OK; } RefPtr charmap; nsresult rv; if (aFontInfoData && (charmap = GetCMAPFromFontInfo(aFontInfoData, mUVSOffset))) { rv = NS_OK; } else { uint32_t kCMAP = TRUETYPE_TAG('c', 'm', 'a', 'p'); charmap = new gfxCharacterMap(); AutoTable cmapTable(this, kCMAP); if (cmapTable) { uint32_t cmapLen; const uint8_t* cmapData = reinterpret_cast( hb_blob_get_data(cmapTable, &cmapLen)); rv = gfxFontUtils::ReadCMAP(cmapData, cmapLen, *charmap, mUVSOffset); } else { rv = NS_ERROR_NOT_AVAILABLE; } } mHasCmapTable = NS_SUCCEEDED(rv); if (mHasCmapTable) { gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList(); fontlist::FontList* sharedFontList = pfl->SharedFontList(); if (!IsUserFont() && mShmemFace) { mShmemFace->SetCharacterMap(sharedFontList, charmap); // async if (!TrySetShmemCharacterMap()) { // Temporarily retain charmap, until the shared version is // ready for use. mCharacterMap = charmap; } } else { mCharacterMap = pfl->FindCharMap(charmap); } } else { // if error occurred, initialize to null cmap mCharacterMap = new gfxCharacterMap(); } LOG_FONTLIST(("(fontlist-cmap) name: %s, size: %zu hash: %8.8x%s\n", mName.get(), charmap->SizeOfIncludingThis(moz_malloc_size_of), charmap->mHash, mCharacterMap == charmap ? " new" : "")); if (LOG_CMAPDATA_ENABLED()) { char prefix[256]; SprintfLiteral(prefix, "(cmapdata) name: %.220s", mName.get()); charmap->Dump(prefix, eGfxLog_cmapdata); } return rv; } static bool HasChar(FcPattern* aFont, FcChar32 aCh) { FcCharSet* charset = nullptr; FcPatternGetCharSet(aFont, FC_CHARSET, 0, &charset); return charset && FcCharSetHasChar(charset, aCh); } bool gfxFontconfigFontEntry::TestCharacterMap(uint32_t aCh) { // For user fonts, or for fonts bundled with the app (which might include // color/svg glyphs where the default glyphs may be blank, and thus confuse // fontconfig/freetype's char map checking), we instead check the cmap // directly for character coverage. if (mIgnoreFcCharmap) { // If it does not actually have a cmap, switch our strategy to use // fontconfig's charmap after all (except for data fonts, which must // always have a cmap to have passed OTS validation). if (!mIsDataUserFont && !HasFontTable(TRUETYPE_TAG('c', 'm', 'a', 'p'))) { mIgnoreFcCharmap = false; // ...and continue with HasChar() below. } else { return gfxFontEntry::TestCharacterMap(aCh); } } // otherwise (for system fonts), use the charmap in the pattern return HasChar(mFontPattern, aCh); } bool gfxFontconfigFontEntry::HasFontTable(uint32_t aTableTag) { if (FTUserFontData* ufd = GetUserFontData()) { return !!gfxFontUtils::FindTableDirEntry(ufd->FontData(), aTableTag); } return gfxFT2FontEntryBase::FaceHasTable(GetFTFace(), aTableTag); } hb_blob_t* gfxFontconfigFontEntry::GetFontTable(uint32_t aTableTag) { // for data fonts, read directly from the font data if (FTUserFontData* ufd = GetUserFontData()) { return gfxFontUtils::GetTableFromFontData(ufd->FontData(), aTableTag); } return gfxFontEntry::GetFontTable(aTableTag); } double gfxFontconfigFontEntry::GetAspect() { if (mAspect != 0.0) { return mAspect; } // try to compute aspect from OS/2 metrics if available AutoTable os2Table(this, TRUETYPE_TAG('O', 'S', '/', '2')); if (os2Table) { uint16_t upem = UnitsPerEm(); if (upem != kInvalidUPEM) { uint32_t len; auto os2 = reinterpret_cast(hb_blob_get_data(os2Table, &len)); if (uint16_t(os2->version) >= 2) { if (len >= offsetof(OS2Table, sxHeight) + sizeof(int16_t) && int16_t(os2->sxHeight) > 0.1 * upem) { mAspect = double(int16_t(os2->sxHeight)) / upem; return mAspect; } } } } // default to aspect = 0.5 if the code below fails mAspect = 0.5; // create a font to calculate x-height / em-height gfxFontStyle s; s.size = 100.0; // pick large size to avoid possible hinting artifacts RefPtr font = FindOrMakeFont(&s); if (font) { const gfxFont::Metrics& metrics = font->GetMetrics(nsFontMetrics::eHorizontal); // The factor of 0.1 ensures that xHeight is sane so fonts don't // become huge. Strictly ">" ensures that xHeight and emHeight are // not both zero. if (metrics.xHeight > 0.1 * metrics.emHeight) { mAspect = metrics.xHeight / metrics.emHeight; } } return mAspect; } static void PrepareFontOptions(FcPattern* aPattern, int* aOutLoadFlags, unsigned int* aOutSynthFlags) { int loadFlags = FT_LOAD_DEFAULT; unsigned int synthFlags = 0; // xxx - taken from the gfxFontconfigFonts code, needs to be reviewed FcBool printing; if (FcPatternGetBool(aPattern, PRINTING_FC_PROPERTY, 0, &printing) != FcResultMatch) { printing = FcFalse; } // Font options are set explicitly here to improve cairo's caching // behavior and to record the relevant parts of the pattern so that // the pattern can be released. // // Most font_options have already been set as defaults on the FcPattern // with cairo_ft_font_options_substitute(), then user and system // fontconfig configurations were applied. The resulting font_options // have been recorded on the face during // cairo_ft_font_face_create_for_pattern(). // // None of the settings here cause this scaled_font to behave any // differently from how it would behave if it were created from the same // face with default font_options. // // We set options explicitly so that the same scaled_font will be found in // the cairo_scaled_font_map when cairo loads glyphs from a context with // the same font_face, font_matrix, ctm, and surface font_options. // // Unfortunately, _cairo_scaled_font_keys_equal doesn't know about the // font_options on the cairo_ft_font_face, and doesn't consider default // option values to not match any explicit values. // // Even after cairo_set_scaled_font is used to set font_options for the // cairo context, when cairo looks for a scaled_font for the context, it // will look for a font with some option values from the target surface if // any values are left default on the context font_options. If this // scaled_font is created with default font_options, cairo will not find // it. // // The one option not recorded in the pattern is hint_metrics, which will // affect glyph metrics. The default behaves as CAIRO_HINT_METRICS_ON. // We should be considering the font_options of the surface on which this // font will be used, but currently we don't have different gfxFonts for // different surface font_options, so we'll create a font suitable for the // Screen. Image and xlib surfaces default to CAIRO_HINT_METRICS_ON. // The remaining options have been recorded on the pattern and the face. // _cairo_ft_options_merge has some logic to decide which options from the // scaled_font or from the cairo_ft_font_face take priority in the way the // font behaves. // // In the majority of cases, _cairo_ft_options_merge uses the options from // the cairo_ft_font_face, so sometimes it is not so important which // values are set here so long as they are not defaults, but we'll set // them to the exact values that we expect from the font, to be consistent // and to protect against changes in cairo. // // In some cases, _cairo_ft_options_merge uses some options from the // scaled_font's font_options rather than options on the // cairo_ft_font_face (from fontconfig). // https://bugs.freedesktop.org/show_bug.cgi?id=11838 // // Surface font options were set on the pattern in // cairo_ft_font_options_substitute. If fontconfig has changed the // hint_style then that is what the user (or distribution) wants, so we // use the setting from the FcPattern. // // Fallback values here mirror treatment of defaults in cairo-ft-font.c. FcBool hinting = FcFalse; if (FcPatternGetBool(aPattern, FC_HINTING, 0, &hinting) != FcResultMatch) { hinting = FcTrue; } int fc_hintstyle = FC_HINT_NONE; if ((!printing || hinting) && FcPatternGetInteger(aPattern, FC_HINT_STYLE, 0, &fc_hintstyle) != FcResultMatch) { fc_hintstyle = FC_HINT_FULL; } switch (fc_hintstyle) { case FC_HINT_NONE: loadFlags = FT_LOAD_NO_HINTING; break; case FC_HINT_SLIGHT: loadFlags = FT_LOAD_TARGET_LIGHT; break; } FcBool fc_antialias; if (FcPatternGetBool(aPattern, FC_ANTIALIAS, 0, &fc_antialias) != FcResultMatch) { fc_antialias = FcTrue; } if (!fc_antialias) { if (fc_hintstyle != FC_HINT_NONE) { loadFlags = FT_LOAD_TARGET_MONO; } loadFlags |= FT_LOAD_MONOCHROME; } else if (fc_hintstyle == FC_HINT_FULL) { int fc_rgba; if (FcPatternGetInteger(aPattern, FC_RGBA, 0, &fc_rgba) != FcResultMatch) { fc_rgba = FC_RGBA_UNKNOWN; } switch (fc_rgba) { case FC_RGBA_RGB: case FC_RGBA_BGR: loadFlags = FT_LOAD_TARGET_LCD; break; case FC_RGBA_VRGB: case FC_RGBA_VBGR: loadFlags = FT_LOAD_TARGET_LCD_V; break; } } FcBool bitmap; if (FcPatternGetBool(aPattern, FC_EMBEDDED_BITMAP, 0, &bitmap) != FcResultMatch) { bitmap = FcFalse; } if (fc_antialias && (fc_hintstyle == FC_HINT_NONE || !bitmap)) { loadFlags |= FT_LOAD_NO_BITMAP; } FcBool autohint; if (FcPatternGetBool(aPattern, FC_AUTOHINT, 0, &autohint) == FcResultMatch && autohint) { loadFlags |= FT_LOAD_FORCE_AUTOHINT; } FcBool embolden; if (FcPatternGetBool(aPattern, FC_EMBOLDEN, 0, &embolden) == FcResultMatch && embolden) { synthFlags |= CAIRO_FT_SYNTHESIZE_BOLD; } *aOutLoadFlags = loadFlags; *aOutSynthFlags = synthFlags; } #ifdef MOZ_WIDGET_GTK // defintion included below static void ApplyGdkScreenFontOptions(FcPattern* aPattern); #endif #ifdef MOZ_X11 static bool GetXftInt(Display* aDisplay, const char* aName, int* aResult) { if (!aDisplay) { return false; } char* value = XGetDefault(aDisplay, "Xft", aName); if (!value) { return false; } if (FcNameConstant(const_cast(ToFcChar8Ptr(value)), aResult)) { return true; } char* end; *aResult = strtol(value, &end, 0); if (end != value) { return true; } return false; } #endif static void PreparePattern(FcPattern* aPattern, bool aIsPrinterFont) { FcConfigSubstitute(nullptr, aPattern, FcMatchPattern); // This gets cairo_font_options_t for the Screen. We should have // different font options for printing (no hinting) but we are not told // what we are measuring for. // // If cairo adds support for lcd_filter, gdk will not provide the default // setting for that option. We could get the default setting by creating // an xlib surface once, recording its font_options, and then merging the // gdk options. // // Using an xlib surface would also be an option to get Screen font // options for non-GTK X11 toolkits, but less efficient than using GDK to // pick up dynamic changes. if (aIsPrinterFont) { cairo_font_options_t* options = cairo_font_options_create(); cairo_font_options_set_hint_style(options, CAIRO_HINT_STYLE_NONE); cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY); cairo_ft_font_options_substitute(options, aPattern); cairo_font_options_destroy(options); FcPatternAddBool(aPattern, PRINTING_FC_PROPERTY, FcTrue); } else if (!gfxPlatform::IsHeadless()) { #ifdef MOZ_WIDGET_GTK ApplyGdkScreenFontOptions(aPattern); # ifdef MOZ_X11 FcValue value; int lcdfilter; if (FcPatternGet(aPattern, FC_LCD_FILTER, 0, &value) == FcResultNoMatch) { GdkDisplay* dpy = gdk_display_get_default(); if (GDK_IS_X11_DISPLAY(dpy) && GetXftInt(GDK_DISPLAY_XDISPLAY(dpy), "lcdfilter", &lcdfilter)) { FcPatternAddInteger(aPattern, FC_LCD_FILTER, lcdfilter); } } # endif // MOZ_X11 #endif // MOZ_WIDGET_GTK } FcDefaultSubstitute(aPattern); } void gfxFontconfigFontEntry::UnscaledFontCache::MoveToFront(size_t aIndex) { if (aIndex > 0) { ThreadSafeWeakPtr front = std::move(mUnscaledFonts[aIndex]); for (size_t i = aIndex; i > 0; i--) { mUnscaledFonts[i] = std::move(mUnscaledFonts[i - 1]); } mUnscaledFonts[0] = std::move(front); } } already_AddRefed gfxFontconfigFontEntry::UnscaledFontCache::Lookup(const std::string& aFile, uint32_t aIndex) { for (size_t i = 0; i < kNumEntries; i++) { RefPtr entry(mUnscaledFonts[i]); if (entry && entry->GetFile() == aFile && entry->GetIndex() == aIndex) { MoveToFront(i); return entry.forget(); } } return nullptr; } static inline gfxFloat SizeForStyle(gfxFontconfigFontEntry* aEntry, const gfxFontStyle& aStyle) { return aStyle.sizeAdjust >= 0.0 ? aStyle.GetAdjustedSize(aEntry->GetAspect()) : aStyle.size; } static double ChooseFontSize(gfxFontconfigFontEntry* aEntry, const gfxFontStyle& aStyle) { double requestedSize = SizeForStyle(aEntry, aStyle); double bestDist = -1.0; double bestSize = requestedSize; double size; int v = 0; while (FcPatternGetDouble(aEntry->GetPattern(), FC_PIXEL_SIZE, v, &size) == FcResultMatch) { ++v; double dist = fabs(size - requestedSize); if (bestDist < 0.0 || dist < bestDist) { bestDist = dist; bestSize = size; } } // If the font has bitmaps but wants to be scaled, then let it scale. if (bestSize >= 0.0) { FcBool scalable; if (FcPatternGetBool(aEntry->GetPattern(), FC_SCALABLE, 0, &scalable) == FcResultMatch && scalable) { return requestedSize; } } return bestSize; } gfxFont* gfxFontconfigFontEntry::CreateFontInstance( const gfxFontStyle* aFontStyle) { RefPtr pattern = dont_AddRef(FcPatternCreate()); if (!pattern) { NS_WARNING("Failed to create Fontconfig pattern for font instance"); return nullptr; } double size = ChooseFontSize(this, *aFontStyle); FcPatternAddDouble(pattern, FC_PIXEL_SIZE, size); RefPtr face = GetFTFace(); if (!face) { NS_WARNING("Failed to get FreeType face for pattern"); return nullptr; } if (HasVariations()) { // For variation fonts, we create a new FT_Face here so that // variation coordinates from the style can be applied without // affecting other font instances created from the same entry // (font resource). // For user fonts: create a new FT_Face from the font data, and then make // a pattern from that. // For system fonts: create a new FT_Face and store it in a copy of the // original mFontPattern. RefPtr varFace = face->GetData() ? face->GetData()->CloneFace() : CreateFaceForPattern(mFontPattern); if (varFace) { AutoTArray settings; GetVariationsForStyle(settings, *aFontStyle); gfxFT2FontBase::SetupVarCoords(GetMMVar(), settings, varFace->GetFace()); face = std::move(varFace); } } PreparePattern(pattern, aFontStyle->printerFont); RefPtr renderPattern = dont_AddRef(FcFontRenderPrepare(nullptr, pattern, mFontPattern)); if (!renderPattern) { NS_WARNING("Failed to prepare Fontconfig pattern for font instance"); return nullptr; } if (aFontStyle->NeedsSyntheticBold(this)) { FcPatternAddBool(renderPattern, FC_EMBOLDEN, FcTrue); } // will synthetic oblique be applied using a transform? if (IsUpright() && aFontStyle->style != FontSlantStyle::Normal() && aFontStyle->allowSyntheticStyle) { // disable embedded bitmaps (mimics behavior in 90-synthetic.conf) FcPatternDel(renderPattern, FC_EMBEDDED_BITMAP); FcPatternAddBool(renderPattern, FC_EMBEDDED_BITMAP, FcFalse); } int loadFlags; unsigned int synthFlags; PrepareFontOptions(renderPattern, &loadFlags, &synthFlags); std::string file; int index = 0; if (!face->GetData()) { const FcChar8* fcFile; if (FcPatternGetString(renderPattern, FC_FILE, 0, const_cast(&fcFile)) != FcResultMatch || FcPatternGetInteger(renderPattern, FC_INDEX, 0, &index) != FcResultMatch) { NS_WARNING("No file in Fontconfig pattern for font instance"); return nullptr; } file = ToCharPtr(fcFile); } RefPtr unscaledFont = mUnscaledFontCache.Lookup(file, index); if (!unscaledFont) { unscaledFont = mFTFace->GetData() ? new UnscaledFontFontconfig(mFTFace) : new UnscaledFontFontconfig( std::move(file), index, mFTFace); mUnscaledFontCache.Add(unscaledFont); } gfxFont* newFont = new gfxFontconfigFont( unscaledFont, std::move(face), renderPattern, size, this, aFontStyle, loadFlags, (synthFlags & CAIRO_FT_SYNTHESIZE_BOLD) != 0); return newFont; } const RefPtr& gfxFontconfigFontEntry::GetFTFace() { if (!mFTFaceInitialized) { mFTFaceInitialized = true; mFTFace = CreateFaceForPattern(mFontPattern); } return mFTFace; } FTUserFontData* gfxFontconfigFontEntry::GetUserFontData() { if (mFTFace && mFTFace->GetData()) { return static_cast(mFTFace->GetData()); } return nullptr; } bool gfxFontconfigFontEntry::HasVariations() { if (mHasVariationsInitialized) { return mHasVariations; } mHasVariationsInitialized = true; mHasVariations = false; if (!gfxPlatform::GetPlatform()->HasVariationFontSupport()) { return mHasVariations; } // For installed fonts, query the fontconfig pattern rather than paying // the cost of loading a FT_Face that we otherwise might never need. if (!IsUserFont() || IsLocalUserFont()) { FcBool variable; if ((FcPatternGetBool(mFontPattern, FC_VARIABLE, 0, &variable) == FcResultMatch) && variable) { mHasVariations = true; } } else { if (GetFTFace()) { mHasVariations = mFTFace->GetFace()->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS; } } return mHasVariations; } FT_MM_Var* gfxFontconfigFontEntry::GetMMVar() { if (mMMVarInitialized) { return mMMVar; } mMMVarInitialized = true; InitializeVarFuncs(); if (!sGetVar) { return nullptr; } if (!GetFTFace()) { return nullptr; } if (FT_Err_Ok != (*sGetVar)(mFTFace->GetFace(), &mMMVar)) { mMMVar = nullptr; } return mMMVar; } void gfxFontconfigFontEntry::GetVariationAxes( nsTArray& aAxes) { if (!HasVariations()) { return; } gfxFT2Utils::GetVariationAxes(GetMMVar(), aAxes); } void gfxFontconfigFontEntry::GetVariationInstances( nsTArray& aInstances) { if (!HasVariations()) { return; } gfxFT2Utils::GetVariationInstances(this, GetMMVar(), aInstances); } nsresult gfxFontconfigFontEntry::CopyFontTable(uint32_t aTableTag, nsTArray& aBuffer) { NS_ASSERTION(!mIsDataUserFont, "data fonts should be reading tables directly from memory"); return gfxFT2FontEntryBase::CopyFaceTable(GetFTFace(), aTableTag, aBuffer); } void gfxFontconfigFontFamily::FindStyleVariations(FontInfoData* aFontInfoData) { if (mHasStyles) { return; } // add font entries for each of the faces uint32_t numFonts = mFontPatterns.Length(); NS_ASSERTION(numFonts, "font family containing no faces!!"); uint32_t numRegularFaces = 0; for (uint32_t i = 0; i < numFonts; i++) { FcPattern* face = mFontPatterns[i]; // figure out the psname/fullname and choose which to use as the facename nsAutoCString psname, fullname; GetFaceNames(face, mName, psname, fullname); const nsAutoCString& faceName = !psname.IsEmpty() ? psname : fullname; gfxFontconfigFontEntry* fontEntry = new gfxFontconfigFontEntry(faceName, face, mContainsAppFonts); if (gfxPlatform::GetPlatform()->HasVariationFontSupport()) { fontEntry->SetupVariationRanges(); } AddFontEntry(fontEntry); if (fontEntry->IsNormalStyle()) { numRegularFaces++; } if (LOG_FONTLIST_ENABLED()) { nsAutoCString weightString; fontEntry->Weight().ToString(weightString); nsAutoCString stretchString; fontEntry->Stretch().ToString(stretchString); nsAutoCString styleString; fontEntry->SlantStyle().ToString(styleString); LOG_FONTLIST( ("(fontlist) added (%s) to family (%s)" " with style: %s weight: %s stretch: %s" " psname: %s fullname: %s", fontEntry->Name().get(), Name().get(), styleString.get(), weightString.get(), stretchString.get(), psname.get(), fullname.get())); } } // somewhat arbitrary, but define a family with two or more regular // faces as a family for which intra-family fallback should be used if (numRegularFaces > 1) { mCheckForFallbackFaces = true; } mFaceNamesInitialized = true; mFontPatterns.Clear(); SetHasStyles(true); CheckForSimpleFamily(); } void gfxFontconfigFontFamily::AddFontPattern(FcPattern* aFontPattern) { NS_ASSERTION( !mHasStyles, "font patterns must not be added to already enumerated families"); FcBool outline; if (FcPatternGetBool(aFontPattern, FC_OUTLINE, 0, &outline) != FcResultMatch || !outline) { mHasNonScalableFaces = true; FcBool scalable; if (FcPatternGetBool(aFontPattern, FC_SCALABLE, 0, &scalable) == FcResultMatch && scalable) { mForceScalable = true; } } mFontPatterns.AppendElement(aFontPattern); } static const double kRejectDistance = 10000.0; // Calculate a distance score representing the size disparity between the // requested style's size and the font entry's size. static double SizeDistance(gfxFontconfigFontEntry* aEntry, const gfxFontStyle& aStyle, bool aForceScalable) { double requestedSize = SizeForStyle(aEntry, aStyle); double bestDist = -1.0; double size; int v = 0; while (FcPatternGetDouble(aEntry->GetPattern(), FC_PIXEL_SIZE, v, &size) == FcResultMatch) { ++v; double dist = fabs(size - requestedSize); if (bestDist < 0.0 || dist < bestDist) { bestDist = dist; } } if (bestDist < 0.0) { // No size means scalable return -1.0; } else if (aForceScalable || 5.0 * bestDist < requestedSize) { // fontconfig prefers a matching family or lang to pixelsize of bitmap // fonts. CSS suggests a tolerance of 20% on pixelsize. return bestDist; } else { // Reject any non-scalable fonts that are not within tolerance. return kRejectDistance; } } void gfxFontconfigFontFamily::FindAllFontsForStyle( const gfxFontStyle& aFontStyle, nsTArray& aFontEntryList, bool aIgnoreSizeTolerance) { gfxFontFamily::FindAllFontsForStyle(aFontStyle, aFontEntryList, aIgnoreSizeTolerance); if (!mHasNonScalableFaces) { return; } // Iterate over the the available fonts while compacting any groups // of unscalable fonts with matching styles into a single entry // corresponding to the closest available size. If the closest // available size is rejected for being outside tolerance, then the // entire group will be skipped. size_t skipped = 0; gfxFontconfigFontEntry* bestEntry = nullptr; double bestDist = -1.0; for (size_t i = 0; i < aFontEntryList.Length(); i++) { gfxFontconfigFontEntry* entry = static_cast(aFontEntryList[i]); double dist = SizeDistance(entry, aFontStyle, mForceScalable || aIgnoreSizeTolerance); // If the entry is scalable or has a style that does not match // the group of unscalable fonts, then start a new group. if (dist < 0.0 || !bestEntry || bestEntry->Stretch() != entry->Stretch() || bestEntry->Weight() != entry->Weight() || bestEntry->SlantStyle() != entry->SlantStyle()) { // If the best entry in this group is still outside the tolerance, // then skip the entire group. if (bestDist >= kRejectDistance) { skipped++; } // Remove any compacted entries from the previous group. if (skipped) { i -= skipped; aFontEntryList.RemoveElementsAt(i, skipped); skipped = 0; } // Mark the start of the new group. bestEntry = entry; bestDist = dist; } else { // If this entry more closely matches the requested size than the // current best in the group, then take this entry instead. if (dist < bestDist) { aFontEntryList[i - 1 - skipped] = entry; bestEntry = entry; bestDist = dist; } skipped++; } } // If the best entry in this group is still outside the tolerance, // then skip the entire group. if (bestDist >= kRejectDistance) { skipped++; } // Remove any compacted entries from the current group. if (skipped) { aFontEntryList.TruncateLength(aFontEntryList.Length() - skipped); } } static bool PatternHasLang(const FcPattern* aPattern, const FcChar8* aLang) { FcLangSet* langset; if (FcPatternGetLangSet(aPattern, FC_LANG, 0, &langset) != FcResultMatch) { return false; } if (FcLangSetHasLang(langset, aLang) != FcLangDifferentLang) { return true; } return false; } bool gfxFontconfigFontFamily::SupportsLangGroup(nsAtom* aLangGroup) const { if (!aLangGroup || aLangGroup == nsGkAtoms::Unicode) { return true; } nsAutoCString fcLang; gfxFcPlatformFontList* pfl = gfxFcPlatformFontList::PlatformFontList(); pfl->GetSampleLangForGroup(aLangGroup, fcLang); if (fcLang.IsEmpty()) { return true; } // Before FindStyleVariations has been called, mFontPatterns will contain // the font patterns. Afterward, it'll be empty, but mAvailableFonts // will contain the font entries, each of which holds a reference to its // pattern. We only check the first pattern in each list, because support // for langs is considered to be consistent across all faces in a family. FcPattern* fontPattern; if (mFontPatterns.Length()) { fontPattern = mFontPatterns[0]; } else if (mAvailableFonts.Length()) { fontPattern = static_cast(mAvailableFonts[0].get()) ->GetPattern(); } else { return true; } // is lang included in the underlying pattern? return PatternHasLang(fontPattern, ToFcChar8Ptr(fcLang.get())); } /* virtual */ gfxFontconfigFontFamily::~gfxFontconfigFontFamily() { // Should not be dropped by stylo MOZ_ASSERT(NS_IsMainThread()); } template void gfxFontconfigFontFamily::AddFacesToFontList(Func aAddPatternFunc) { if (HasStyles()) { for (auto& fe : mAvailableFonts) { if (!fe) { continue; } auto fce = static_cast(fe.get()); aAddPatternFunc(fce->GetPattern(), mContainsAppFonts); } } else { for (auto& pat : mFontPatterns) { aAddPatternFunc(pat, mContainsAppFonts); } } } gfxFontconfigFont::gfxFontconfigFont( const RefPtr& aUnscaledFont, RefPtr&& aFTFace, FcPattern* aPattern, gfxFloat aAdjustedSize, gfxFontEntry* aFontEntry, const gfxFontStyle* aFontStyle, int aLoadFlags, bool aEmbolden) : gfxFT2FontBase(aUnscaledFont, std::move(aFTFace), aFontEntry, aFontStyle, aLoadFlags, aEmbolden), mPattern(aPattern) { mAdjustedSize = aAdjustedSize; InitMetrics(); } gfxFontconfigFont::~gfxFontconfigFont() = default; already_AddRefed gfxFontconfigFont::GetScaledFont( mozilla::gfx::DrawTarget* aTarget) { if (!mAzureScaledFont) { mAzureScaledFont = Factory::CreateScaledFontForFontconfigFont( GetUnscaledFont(), GetAdjustedSize(), mFTFace, GetPattern()); InitializeScaledFont(); } RefPtr scaledFont(mAzureScaledFont); return scaledFont.forget(); } bool gfxFontconfigFont::ShouldHintMetrics() const { return !GetStyle()->printerFont; } gfxFcPlatformFontList::gfxFcPlatformFontList() : mLocalNames(64), mGenericMappings(32), mFcSubstituteCache(64), mLastConfig(nullptr), mAlwaysUseFontconfigGenerics(true) { CheckFamilyList(kBaseFonts_Ubuntu_20_04, ArrayLength(kBaseFonts_Ubuntu_20_04)); CheckFamilyList(kLangFonts_Ubuntu_20_04, ArrayLength(kLangFonts_Ubuntu_20_04)); CheckFamilyList(kBaseFonts_Fedora_32, ArrayLength(kBaseFonts_Fedora_32)); mLastConfig = FcConfigGetCurrent(); if (XRE_IsParentProcess()) { // if the rescan interval is set, start the timer int rescanInterval = FcConfigGetRescanInterval(nullptr); if (rescanInterval) { NS_NewTimerWithFuncCallback( getter_AddRefs(mCheckFontUpdatesTimer), CheckFontUpdates, this, (rescanInterval + 1) * 1000, nsITimer::TYPE_REPEATING_SLACK, "gfxFcPlatformFontList::gfxFcPlatformFontList"); if (!mCheckFontUpdatesTimer) { NS_WARNING("Failure to create font updates timer"); } } } #ifdef MOZ_BUNDLED_FONTS mBundledFontsInitialized = false; #endif } gfxFcPlatformFontList::~gfxFcPlatformFontList() { if (mCheckFontUpdatesTimer) { mCheckFontUpdatesTimer->Cancel(); mCheckFontUpdatesTimer = nullptr; } } void gfxFcPlatformFontList::AddFontSetFamilies(FcFontSet* aFontSet, const SandboxPolicy* aPolicy, bool aAppFonts) { // This iterates over the fonts in a font set and adds in gfxFontFamily // objects for each family. Individual gfxFontEntry objects for each face // are not created here; the patterns are just stored in the family. When // a family is actually used, it will be populated with gfxFontEntry // records and the patterns moved to those. if (!aFontSet) { NS_WARNING("AddFontSetFamilies called with a null font set."); return; } FcChar8* lastFamilyName = (FcChar8*)""; RefPtr fontFamily; nsAutoCString familyName; for (int f = 0; f < aFontSet->nfont; f++) { FcPattern* pattern = aFontSet->fonts[f]; // Skip any fonts that aren't readable for us (e.g. due to restrictive // file ownership/permissions). FcChar8* path; if (FcPatternGetString(pattern, FC_FILE, 0, &path) != FcResultMatch) { continue; } if (access(reinterpret_cast(path), F_OK | R_OK) != 0) { continue; } #if defined(MOZ_SANDBOX) && defined(XP_LINUX) // Skip any fonts that will be blocked by the content-process sandbox // policy. if (aPolicy && !(aPolicy->Lookup(reinterpret_cast(path)) & SandboxBroker::Perms::MAY_READ)) { continue; } #endif AddPatternToFontList(pattern, lastFamilyName, familyName, fontFamily, aAppFonts); } } void gfxFcPlatformFontList::AddPatternToFontList( FcPattern* aFont, FcChar8*& aLastFamilyName, nsACString& aFamilyName, RefPtr& aFontFamily, bool aAppFonts) { // get canonical name uint32_t cIndex = FindCanonicalNameIndex(aFont, FC_FAMILYLANG); FcChar8* canonical = nullptr; FcPatternGetString(aFont, FC_FAMILY, cIndex, &canonical); if (!canonical) { return; } // same as the last one? no need to add a new family, skip if (FcStrCmp(canonical, aLastFamilyName) != 0) { aLastFamilyName = canonical; // add new family if one doesn't already exist aFamilyName.Truncate(); aFamilyName = ToCharPtr(canonical); nsAutoCString keyName(aFamilyName); ToLowerCase(keyName); aFontFamily = static_cast(mFontFamilies.GetWeak(keyName)); if (!aFontFamily) { FontVisibility visibility = aAppFonts ? FontVisibility::Base : GetVisibilityForFamily(keyName); aFontFamily = new gfxFontconfigFontFamily(aFamilyName, visibility); mFontFamilies.Put(keyName, RefPtr{aFontFamily}); } // Record if the family contains fonts from the app font set // (in which case we won't rely on fontconfig's charmap, due to // bug 1276594). if (aAppFonts) { aFontFamily->SetFamilyContainsAppFonts(true); } // Add pointers to other localized family names. Most fonts // only have a single name, so the first call to GetString // will usually not match FcChar8* otherName; int n = (cIndex == 0 ? 1 : 0); while (FcPatternGetString(aFont, FC_FAMILY, n, &otherName) == FcResultMatch) { nsAutoCString otherFamilyName(ToCharPtr(otherName)); AddOtherFamilyName(aFontFamily, otherFamilyName); n++; if (n == int(cIndex)) { n++; // skip over canonical name } } } MOZ_ASSERT(aFontFamily, "font must belong to a font family"); aFontFamily->AddFontPattern(aFont); // map the psname, fullname ==> font family for local font lookups nsAutoCString psname, fullname; GetFaceNames(aFont, aFamilyName, psname, fullname); if (!psname.IsEmpty()) { ToLowerCase(psname); mLocalNames.Put(psname, aFont); } if (!fullname.IsEmpty()) { ToLowerCase(fullname); mLocalNames.Put(fullname, aFont); } } nsresult gfxFcPlatformFontList::InitFontListForPlatform() { #ifdef MOZ_BUNDLED_FONTS if (StaticPrefs::gfx_bundled_fonts_activate_AtStartup() != 0) { ActivateBundledFonts(); } #endif mLocalNames.Clear(); mFcSubstituteCache.Clear(); mAlwaysUseFontconfigGenerics = PrefFontListsUseOnlyGenerics(); mOtherFamilyNamesInitialized = true; mLastConfig = FcConfigGetCurrent(); if (XRE_IsContentProcess()) { // Content process: use the font list passed from the chrome process, // because we can't rely on fontconfig in the presence of sandboxing; // it may report fonts that we can't actually access. FcChar8* lastFamilyName = (FcChar8*)""; RefPtr fontFamily; nsAutoCString familyName; // Get font list that was passed during XPCOM startup // or in an UpdateFontList message. auto& fontList = dom::ContentChild::GetSingleton()->SystemFontList(); // For fontconfig versions between 2.10.94 and 2.11.1 inclusive, // we need to escape any leading space in the charset element, // otherwise FcNameParse will fail. :( // // The bug was introduced on 2013-05-24 by // https://cgit.freedesktop.org/fontconfig/commit/?id=cd9b1033a68816a7acfbba1718ba0aa5888f6ec7 // "Bug 64906 - FcNameParse() should ignore leading whitespace in // parameters" // because ignoring a leading space in the encoded value of charset // causes erroneous decoding of the whole element. // This first shipped in version 2.10.94, and was eventually fixed as // a side-effect of switching to the "human-readable" representation of // charsets on 2014-07-03 in // https://cgit.freedesktop.org/fontconfig/commit/?id=e708e97c351d3bc9f7030ef22ac2f007d5114730 // "Change charset parse/unparse format to be human readable" // (with a followup fix next day) which means a leading space is no // longer significant. This fix landed after 2.11.1 had been shipped, // so the first version tag without the bug is 2.11.91. int fcVersion = FcGetVersion(); bool fcCharsetParseBug = fcVersion >= 21094 && fcVersion <= 21101; for (FontPatternListEntry& fpe : fontList) { nsCString& patternStr = fpe.pattern(); if (fcCharsetParseBug) { int32_t index = patternStr.Find(":charset= "); if (index != kNotFound) { // insert backslash after the =, before the space patternStr.Insert('\\', index + 9); } } FcPattern* pattern = FcNameParse((const FcChar8*)patternStr.get()); AddPatternToFontList(pattern, lastFamilyName, familyName, fontFamily, fpe.appFontFamily()); FcPatternDestroy(pattern); } LOG_FONTLIST( ("got font list from chrome process: " "%u faces in %u families", (unsigned)fontList.Length(), mFontFamilies.Count())); fontList.Clear(); return NS_OK; } UniquePtr policy; #if defined(MOZ_SANDBOX) && defined(XP_LINUX) // If read sandboxing is enabled, create a temporary SandboxPolicy to // check font paths; use a fake PID to avoid picking up any PID-specific // rules by accident. SandboxBrokerPolicyFactory policyFactory; if (GetEffectiveContentSandboxLevel() > 2 && !PR_GetEnv("MOZ_DISABLE_CONTENT_SANDBOX")) { policy = policyFactory.GetContentPolicy(-1, false); } #endif // iterate over available fonts FcFontSet* systemFonts = FcConfigGetFonts(nullptr, FcSetSystem); AddFontSetFamilies(systemFonts, policy.get(), /* aAppFonts = */ false); #ifdef MOZ_BUNDLED_FONTS if (StaticPrefs::gfx_bundled_fonts_activate_AtStartup() != 0) { FcFontSet* appFonts = FcConfigGetFonts(nullptr, FcSetApplication); AddFontSetFamilies(appFonts, policy.get(), /* aAppFonts = */ true); } #endif return NS_OK; } void gfxFcPlatformFontList::ReadSystemFontList( nsTArray* retValue) { // Fontconfig versions below 2.9 drop the FC_FILE element in FcNameUnparse // (see https://bugs.freedesktop.org/show_bug.cgi?id=26718), so when using // an older version, we manually append it to the unparsed pattern. if (FcGetVersion() < 20900) { for (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) { auto family = static_cast(iter.Data().get()); family->AddFacesToFontList([&](FcPattern* aPat, bool aAppFonts) { char* s = (char*)FcNameUnparse(aPat); nsDependentCString patternStr(s); char* file = nullptr; if (FcResultMatch == FcPatternGetString(aPat, FC_FILE, 0, (FcChar8**)&file)) { patternStr.Append(":file="); patternStr.Append(file); } retValue->AppendElement(FontPatternListEntry(patternStr, aAppFonts)); free(s); }); } } else { for (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) { auto family = static_cast(iter.Data().get()); family->AddFacesToFontList([&](FcPattern* aPat, bool aAppFonts) { char* s = (char*)FcNameUnparse(aPat); nsDependentCString patternStr(s); retValue->AppendElement(FontPatternListEntry(patternStr, aAppFonts)); free(s); }); } } } void gfxFcPlatformFontList::InitSharedFontListForPlatform() { mLocalNames.Clear(); mFcSubstituteCache.Clear(); mAlwaysUseFontconfigGenerics = PrefFontListsUseOnlyGenerics(); mOtherFamilyNamesInitialized = true; mLastConfig = FcConfigGetCurrent(); if (!XRE_IsParentProcess()) { // Content processes will access the shared-memory data created by the // parent, so they do not need to query fontconfig for the available // fonts themselves. return; } #ifdef MOZ_BUNDLED_FONTS if (StaticPrefs::gfx_bundled_fonts_activate_AtStartup() != 0) { ActivateBundledFonts(); } #endif UniquePtr policy; #if defined(MOZ_CONTENT_SANDBOX) && defined(XP_LINUX) // If read sandboxing is enabled, create a temporary SandboxPolicy to // check font paths; use a fake PID to avoid picking up any PID-specific // rules by accident. SandboxBrokerPolicyFactory policyFactory; if (GetEffectiveContentSandboxLevel() > 2 && !PR_GetEnv("MOZ_DISABLE_CONTENT_SANDBOX")) { policy = policyFactory.GetContentPolicy(-1, false); } #endif nsTArray families; using FaceInitArray = nsTArray; nsClassHashtable faces; // Do we need to work around the fontconfig FcNameParse/FcNameUnparse bug // (present in versions between 2.10.94 and 2.11.1 inclusive)? See comment // in InitFontListForPlatform for details. int fcVersion = FcGetVersion(); bool fcCharsetParseBug = fcVersion >= 21094 && fcVersion <= 21101; auto addPattern = [this, fcCharsetParseBug, &families, &faces]( FcPattern* aPattern, FcChar8*& aLastFamilyName, nsCString& aFamilyName, bool aAppFont) -> void { // get canonical name uint32_t cIndex = FindCanonicalNameIndex(aPattern, FC_FAMILYLANG); FcChar8* canonical = nullptr; FcPatternGetString(aPattern, FC_FAMILY, cIndex, &canonical); if (!canonical) { return; } nsAutoCString keyName; keyName = ToCharPtr(canonical); ToLowerCase(keyName); FaceInitArray* faceListPtr = nullptr; // Same canonical family name as the last one? Definitely no need to add a // new family record. if (FcStrCmp(canonical, aLastFamilyName) == 0) { faceListPtr = faces.Get(keyName); MOZ_ASSERT(faceListPtr); } else { aLastFamilyName = canonical; aFamilyName = ToCharPtr(canonical); // Add new family record if one doesn't already exist. auto faceList = faces.LookupForAdd(keyName); if (!faceList) { faceList.OrInsert([]() { return new FaceInitArray; }); FontVisibility visibility = aAppFont ? FontVisibility::Base : GetVisibilityForFamily(keyName); families.AppendElement(fontlist::Family::InitData( keyName, aFamilyName, fontlist::Family::kNoIndex, visibility, /*bundled*/ aAppFont, /*badUnderline*/ false)); } faceListPtr = faceList.Data().get(); } char* s = (char*)FcNameUnparse(aPattern); nsAutoCString descriptor(s); free(s); if (fcCharsetParseBug) { // Escape any leading space in charset to work around FcNameParse bug. int32_t index = descriptor.Find(":charset= "); if (index != kNotFound) { // insert backslash after the =, before the space descriptor.Insert('\\', index + 9); } } WeightRange weight(FontWeight::Normal()); StretchRange stretch(FontStretch::Normal()); SlantStyleRange style(FontSlantStyle::Normal()); GetFontProperties(aPattern, &weight, &stretch, &style); faceListPtr->AppendElement( fontlist::Face::InitData{descriptor, 0, false, weight, stretch, style}); // map the psname, fullname ==> font family for local font lookups nsAutoCString psname, fullname; GetFaceNames(aPattern, aFamilyName, psname, fullname); if (!psname.IsEmpty()) { ToLowerCase(psname); mLocalNameTable.Put( psname, fontlist::LocalFaceRec::InitData(keyName, descriptor)); } if (!fullname.IsEmpty()) { ToLowerCase(fullname); if (fullname != psname) { mLocalNameTable.Put( fullname, fontlist::LocalFaceRec::InitData(keyName, descriptor)); } } // Add entries for any other localized family names. (Most fonts only have // a single family name, so the first call to GetString will usually fail). FcChar8* otherName; int n = (cIndex == 0 ? 1 : 0); while (FcPatternGetString(aPattern, FC_FAMILY, n, &otherName) == FcResultMatch) { nsAutoCString otherFamilyName(ToCharPtr(otherName)); keyName = otherFamilyName; ToLowerCase(keyName); auto faceList = faces.LookupForAdd(keyName); if (!faceList) { faceList.OrInsert([]() { return new FaceInitArray; }); FontVisibility visibility = aAppFont ? FontVisibility::Base : GetVisibilityForFamily(keyName); families.AppendElement(fontlist::Family::InitData( keyName, otherFamilyName, fontlist::Family::kNoIndex, visibility, /*bundled*/ aAppFont, /*badUnderline*/ false)); } faceList.Data()->AppendElement(fontlist::Face::InitData{ descriptor, 0, false, weight, stretch, style}); n++; if (n == int(cIndex)) { n++; // skip over canonical name } } }; auto addFontSetFamilies = [&addPattern](FcFontSet* aFontSet, SandboxPolicy* aPolicy, bool aAppFonts) -> void { FcChar8* lastFamilyName = (FcChar8*)""; RefPtr fontFamily; nsAutoCString familyName; for (int f = 0; f < aFontSet->nfont; f++) { FcPattern* pattern = aFontSet->fonts[f]; // Skip any fonts that aren't readable for us (e.g. due to restrictive // file ownership/permissions). FcChar8* path; if (FcPatternGetString(pattern, FC_FILE, 0, &path) != FcResultMatch) { continue; } if (access(reinterpret_cast(path), F_OK | R_OK) != 0) { continue; } #if defined(MOZ_CONTENT_SANDBOX) && defined(XP_LINUX) // Skip any fonts that will be blocked by the content-process sandbox // policy. if (aPolicy && !(aPolicy->Lookup(reinterpret_cast(path)) & SandboxBroker::Perms::MAY_READ)) { continue; } #endif addPattern(pattern, lastFamilyName, familyName, aAppFonts); } }; // iterate over available fonts FcFontSet* systemFonts = FcConfigGetFonts(nullptr, FcSetSystem); addFontSetFamilies(systemFonts, policy.get(), /* aAppFonts = */ false); #ifdef MOZ_BUNDLED_FONTS if (StaticPrefs::gfx_bundled_fonts_activate_AtStartup() != 0) { FcFontSet* appFonts = FcConfigGetFonts(nullptr, FcSetApplication); addFontSetFamilies(appFonts, policy.get(), /* aAppFonts = */ true); } #endif mozilla::fontlist::FontList* list = SharedFontList(); list->SetFamilyNames(families); for (uint32_t i = 0; i < families.Length(); i++) { list->Families()[i].AddFaces(list, *faces.Get(families[i].mKey)); } } gfxFcPlatformFontList::DistroID gfxFcPlatformFontList::GetDistroID() const { // Helper called to initialize sResult the first time this is used. auto getDistroID = []() { DistroID result = DistroID::Unknown; FILE* fp = fopen("/etc/os-release", "r"); if (fp) { char buf[512]; while (fgets(buf, sizeof(buf), fp)) { if (strncmp(buf, "ID=", 3) == 0) { if (strncmp(buf + 3, "ubuntu", 6) == 0) { result = DistroID::Ubuntu; } else if (strncmp(buf + 3, "fedora", 6) == 0) { result = DistroID::Fedora; } break; } } fclose(fp); } return result; }; static DistroID sResult = getDistroID(); return sResult; } FontVisibility gfxFcPlatformFontList::GetVisibilityForFamily( const nsACString& aName) const { switch (GetDistroID()) { case DistroID::Ubuntu: if (FamilyInList(aName, kBaseFonts_Ubuntu_20_04, ArrayLength(kBaseFonts_Ubuntu_20_04))) { return FontVisibility::Base; } if (FamilyInList(aName, kLangFonts_Ubuntu_20_04, ArrayLength(kLangFonts_Ubuntu_20_04))) { return FontVisibility::LangPack; } return FontVisibility::User; case DistroID::Fedora: if (FamilyInList(aName, kBaseFonts_Fedora_32, ArrayLength(kBaseFonts_Fedora_32))) { return FontVisibility::Base; } return FontVisibility::User; default: // We don't know how to categorize fonts on this system return FontVisibility::Unknown; } } gfxFontEntry* gfxFcPlatformFontList::CreateFontEntry( fontlist::Face* aFace, const fontlist::Family* aFamily) { nsAutoCString desc(aFace->mDescriptor.AsString(SharedFontList())); FcPattern* pattern = FcNameParse((const FcChar8*)desc.get()); auto* fe = new gfxFontconfigFontEntry(desc, pattern, true); FcPatternDestroy(pattern); fe->InitializeFrom(aFace, aFamily); return fe; } // For displaying the fontlist in UI, use explicit call to FcFontList. Using // FcFontList results in the list containing the localized names as dictated // by system defaults. static void GetSystemFontList(nsTArray& aListOfFonts, nsAtom* aLangGroup) { aListOfFonts.Clear(); RefPtr pat = dont_AddRef(FcPatternCreate()); if (!pat) { return; } UniquePtr os(FcObjectSetBuild(FC_FAMILY, nullptr)); if (!os) { return; } // add the lang to the pattern nsAutoCString fcLang; gfxFcPlatformFontList* pfl = gfxFcPlatformFontList::PlatformFontList(); pfl->GetSampleLangForGroup(aLangGroup, fcLang, /*aForFontEnumerationThread*/ true); if (!fcLang.IsEmpty()) { FcPatternAddString(pat, FC_LANG, ToFcChar8Ptr(fcLang.get())); } UniquePtr fs(FcFontList(nullptr, pat, os.get())); if (!fs) { return; } for (int i = 0; i < fs->nfont; i++) { char* family; if (FcPatternGetString(fs->fonts[i], FC_FAMILY, 0, (FcChar8**)&family) != FcResultMatch) { continue; } // Remove duplicates... nsAutoString strFamily; AppendUTF8toUTF16(MakeStringSpan(family), strFamily); if (aListOfFonts.Contains(strFamily)) { continue; } aListOfFonts.AppendElement(strFamily); } aListOfFonts.Sort(); } void gfxFcPlatformFontList::GetFontList(nsAtom* aLangGroup, const nsACString& aGenericFamily, nsTArray& aListOfFonts) { // Get the list of font family names using fontconfig GetSystemFontList(aListOfFonts, aLangGroup); // Under Linux, the generics "serif", "sans-serif" and "monospace" // are included in the pref fontlist. These map to whatever fontconfig // decides they should be for a given language, rather than one of the // fonts listed in the prefs font lists (e.g. font.name.*, font.name-list.*) bool serif = false, sansSerif = false, monospace = false; if (aGenericFamily.IsEmpty()) serif = sansSerif = monospace = true; else if (aGenericFamily.LowerCaseEqualsLiteral("serif")) serif = true; else if (aGenericFamily.LowerCaseEqualsLiteral("sans-serif")) sansSerif = true; else if (aGenericFamily.LowerCaseEqualsLiteral("monospace")) monospace = true; else if (aGenericFamily.LowerCaseEqualsLiteral("cursive") || aGenericFamily.LowerCaseEqualsLiteral("fantasy")) serif = sansSerif = true; else MOZ_ASSERT_UNREACHABLE("unexpected CSS generic font family"); // The first in the list becomes the default in // FontBuilder.readFontSelection() if the preference-selected font is not // available, so put system configured defaults first. if (monospace) aListOfFonts.InsertElementAt(0, u"monospace"_ns); if (sansSerif) aListOfFonts.InsertElementAt(0, u"sans-serif"_ns); if (serif) aListOfFonts.InsertElementAt(0, u"serif"_ns); } FontFamily gfxFcPlatformFontList::GetDefaultFontForPlatform( const gfxFontStyle* aStyle, nsAtom* aLanguage) { // Get the default font by using a fake name to retrieve the first // scalable font that fontconfig suggests for the given language. PrefFontList* prefFonts = FindGenericFamilies( "-moz-default"_ns, aLanguage ? aLanguage : nsGkAtoms::x_western); NS_ASSERTION(prefFonts, "null list of generic fonts"); if (prefFonts && !prefFonts->IsEmpty()) { return (*prefFonts)[0]; } return FontFamily(); } gfxFontEntry* gfxFcPlatformFontList::LookupLocalFont( const nsACString& aFontName, WeightRange aWeightForEntry, StretchRange aStretchForEntry, SlantStyleRange aStyleForEntry) { nsAutoCString keyName(aFontName); ToLowerCase(keyName); if (SharedFontList()) { return LookupInSharedFaceNameList(aFontName, aWeightForEntry, aStretchForEntry, aStyleForEntry); } // if name is not in the global list, done FcPattern* fontPattern = mLocalNames.Get(keyName); if (!fontPattern) { return nullptr; } return new gfxFontconfigFontEntry(aFontName, fontPattern, aWeightForEntry, aStretchForEntry, aStyleForEntry); } gfxFontEntry* gfxFcPlatformFontList::MakePlatformFont( const nsACString& aFontName, WeightRange aWeightForEntry, StretchRange aStretchForEntry, SlantStyleRange aStyleForEntry, const uint8_t* aFontData, uint32_t aLength) { RefPtr ufd = new FTUserFontData(aFontData, aLength); RefPtr face = ufd->CloneFace(); if (!face) { return nullptr; } return new gfxFontconfigFontEntry(aFontName, aWeightForEntry, aStretchForEntry, aStyleForEntry, std::move(face)); } bool gfxFcPlatformFontList::FindAndAddFamilies( StyleGenericFontFamily aGeneric, const nsACString& aFamily, nsTArray* aOutput, FindFamiliesFlags aFlags, gfxFontStyle* aStyle, nsAtom* aLanguage, gfxFloat aDevToCssSize) { nsAutoCString familyName(aFamily); ToLowerCase(familyName); if (!(aFlags & FindFamiliesFlags::eQuotedFamilyName)) { // deprecated generic names are explicitly converted to standard generics bool isDeprecatedGeneric = false; if (familyName.EqualsLiteral("sans") || familyName.EqualsLiteral("sans serif")) { familyName.AssignLiteral("sans-serif"); isDeprecatedGeneric = true; } else if (familyName.EqualsLiteral("mono")) { familyName.AssignLiteral("monospace"); isDeprecatedGeneric = true; } // fontconfig generics? use fontconfig to determine the family for lang if (isDeprecatedGeneric || mozilla::FontFamilyName::Convert(familyName).IsGeneric()) { PrefFontList* prefFonts = FindGenericFamilies(familyName, aLanguage); if (prefFonts && !prefFonts->IsEmpty()) { aOutput->AppendElements(*prefFonts); return true; } return false; } } // fontconfig allows conditional substitutions in such a way that it's // difficult to distinguish an explicit substitution from other suggested // choices. To sniff out explicit substitutions, compare the substitutions // for "font, -moz-sentinel" to "-moz-sentinel" to sniff out the // substitutions // // Example: // // serif ==> DejaVu Serif, ... // Helvetica, serif ==> Helvetica, TeX Gyre Heros, Nimbus Sans L, DejaVu // Serif // // In this case fontconfig is including Tex Gyre Heros and // Nimbus Sans L as alternatives for Helvetica. // Because the FcConfigSubstitute call is quite expensive, we cache the // actual font families found via this process. So check the cache first: if (auto* cachedFamilies = mFcSubstituteCache.GetValue(familyName)) { if (cachedFamilies->IsEmpty()) { return false; } aOutput->AppendElements(*cachedFamilies); return true; } // It wasn't in the cache, so we need to ask fontconfig... const FcChar8* kSentinelName = ToFcChar8Ptr("-moz-sentinel"); FcChar8* sentinelFirstFamily = nullptr; RefPtr sentinelSubst = dont_AddRef(FcPatternCreate()); FcPatternAddString(sentinelSubst, FC_FAMILY, kSentinelName); FcConfigSubstitute(nullptr, sentinelSubst, FcMatchPattern); FcPatternGetString(sentinelSubst, FC_FAMILY, 0, &sentinelFirstFamily); // substitutions for font, -moz-sentinel pattern RefPtr fontWithSentinel = dont_AddRef(FcPatternCreate()); FcPatternAddString(fontWithSentinel, FC_FAMILY, ToFcChar8Ptr(familyName.get())); FcPatternAddString(fontWithSentinel, FC_FAMILY, kSentinelName); FcConfigSubstitute(nullptr, fontWithSentinel, FcMatchPattern); // Add all font family matches until reaching the sentinel. AutoTArray cachedFamilies; FcChar8* substName = nullptr; for (int i = 0; FcPatternGetString(fontWithSentinel, FC_FAMILY, i, &substName) == FcResultMatch; i++) { if (sentinelFirstFamily && FcStrCmp(substName, sentinelFirstFamily) == 0) { break; } gfxPlatformFontList::FindAndAddFamilies( aGeneric, nsDependentCString(ToCharPtr(substName)), &cachedFamilies, aFlags, aStyle, aLanguage); } // Cache the resulting list, so we don't have to do this again. mFcSubstituteCache.Put(familyName, cachedFamilies); if (cachedFamilies.IsEmpty()) { return false; } aOutput->AppendElements(cachedFamilies); return true; } bool gfxFcPlatformFontList::GetStandardFamilyName(const nsCString& aFontName, nsACString& aFamilyName) { aFamilyName.Truncate(); // The fontconfig list of fonts includes generic family names in the // font list. For these, just use the generic name. if (aFontName.EqualsLiteral("serif") || aFontName.EqualsLiteral("sans-serif") || aFontName.EqualsLiteral("monospace")) { aFamilyName.Assign(aFontName); return true; } RefPtr pat = dont_AddRef(FcPatternCreate()); if (!pat) { return true; } UniquePtr os(FcObjectSetBuild(FC_FAMILY, nullptr)); if (!os) { return true; } // add the family name to the pattern FcPatternAddString(pat, FC_FAMILY, ToFcChar8Ptr(aFontName.get())); UniquePtr givenFS(FcFontList(nullptr, pat, os.get())); if (!givenFS) { return true; } // See if there is a font face with first family equal to the given family // (needs to be in sync with names coming from GetFontList()) nsTArray candidates; for (int i = 0; i < givenFS->nfont; i++) { char* firstFamily; if (FcPatternGetString(givenFS->fonts[i], FC_FAMILY, 0, (FcChar8**)&firstFamily) != FcResultMatch) { continue; } nsDependentCString first(firstFamily); if (!candidates.Contains(first)) { candidates.AppendElement(first); if (aFontName.Equals(first)) { aFamilyName.Assign(aFontName); return true; } } } // Because fontconfig conflates different family name types, need to // double check that the candidate name is not simply a different // name type. For example, if a font with nameID=16 "Minion Pro" and // nameID=21 "Minion Pro Caption" exists, calling FcFontList with // family="Minion Pro" will return a set of patterns some of which // will have a first family of "Minion Pro Caption". Ignore these // patterns and use the first candidate that maps to a font set with // the same number of faces and an identical set of patterns. for (uint32_t j = 0; j < candidates.Length(); ++j) { FcPatternDel(pat, FC_FAMILY); FcPatternAddString(pat, FC_FAMILY, (FcChar8*)candidates[j].get()); UniquePtr candidateFS(FcFontList(nullptr, pat, os.get())); if (!candidateFS) { return true; } if (candidateFS->nfont != givenFS->nfont) { continue; } bool equal = true; for (int i = 0; i < givenFS->nfont; ++i) { if (!FcPatternEqual(candidateFS->fonts[i], givenFS->fonts[i])) { equal = false; break; } } if (equal) { aFamilyName = candidates[j]; return true; } } // didn't find localized name, leave family name blank return true; } void gfxFcPlatformFontList::AddGenericFonts( StyleGenericFontFamily aGenericType, nsAtom* aLanguage, nsTArray& aFamilyList) { bool usePrefFontList = false; const char* generic = GetGenericName(aGenericType); NS_ASSERTION(generic, "weird generic font type"); if (!generic) { return; } // By default, most font prefs on Linux map to "use fontconfig" // keywords. So only need to explicitly lookup font pref if // non-default settings exist nsAutoCString genericToLookup(generic); if ((!mAlwaysUseFontconfigGenerics && aLanguage) || aLanguage == nsGkAtoms::x_math) { nsAtom* langGroup = GetLangGroup(aLanguage); nsAutoString fontlistValue; Preferences::GetString(NamePref(generic, langGroup).get(), fontlistValue); nsresult rv; if (fontlistValue.IsEmpty()) { // The font name list may have two or more family names as comma // separated list. In such case, not matching with generic font // name is fine because if the list prefers specific font, we // should try to use the pref with complicated path. rv = Preferences::GetString(NameListPref(generic, langGroup).get(), fontlistValue); } else { rv = NS_OK; } if (NS_SUCCEEDED(rv)) { if (!fontlistValue.EqualsLiteral("serif") && !fontlistValue.EqualsLiteral("sans-serif") && !fontlistValue.EqualsLiteral("monospace")) { usePrefFontList = true; } else { // serif, sans-serif or monospace was specified genericToLookup.Truncate(); AppendUTF16toUTF8(fontlistValue, genericToLookup); } } } // when pref fonts exist, use standard pref font lookup if (usePrefFontList) { return gfxPlatformFontList::AddGenericFonts(aGenericType, aLanguage, aFamilyList); } PrefFontList* prefFonts = FindGenericFamilies(genericToLookup, aLanguage); NS_ASSERTION(prefFonts, "null generic font list"); aFamilyList.SetCapacity(aFamilyList.Length() + prefFonts->Length()); for (auto& f : *prefFonts) { aFamilyList.AppendElement(FamilyAndGeneric(f, aGenericType)); } } void gfxFcPlatformFontList::ClearLangGroupPrefFonts() { ClearGenericMappings(); gfxPlatformFontList::ClearLangGroupPrefFonts(); mAlwaysUseFontconfigGenerics = PrefFontListsUseOnlyGenerics(); } gfxPlatformFontList::PrefFontList* gfxFcPlatformFontList::FindGenericFamilies( const nsCString& aGeneric, nsAtom* aLanguage) { // set up name nsAutoCString fcLang; GetSampleLangForGroup(aLanguage, fcLang); ToLowerCase(fcLang); nsAutoCString genericLang(aGeneric); if (fcLang.Length() > 0) { genericLang.Append('-'); } genericLang.Append(fcLang); // try to get the family from the cache PrefFontList* prefFonts = mGenericMappings.Get(genericLang); if (prefFonts) { return prefFonts; } // if not found, ask fontconfig to pick the appropriate font RefPtr genericPattern = dont_AddRef(FcPatternCreate()); FcPatternAddString(genericPattern, FC_FAMILY, ToFcChar8Ptr(aGeneric.get())); // -- prefer scalable fonts FcPatternAddBool(genericPattern, FC_SCALABLE, FcTrue); // -- add the lang to the pattern if (!fcLang.IsEmpty()) { FcPatternAddString(genericPattern, FC_LANG, ToFcChar8Ptr(fcLang.get())); } // -- perform substitutions FcConfigSubstitute(nullptr, genericPattern, FcMatchPattern); FcDefaultSubstitute(genericPattern); // -- sort to get the closest matches FcResult result; UniquePtr faces( FcFontSort(nullptr, genericPattern, FcFalse, nullptr, &result)); if (!faces) { return nullptr; } // -- select the fonts to be used for the generic prefFonts = new PrefFontList; // can be empty but in practice won't happen uint32_t limit = gfxPlatformGtk::GetPlatform()->MaxGenericSubstitions(); bool foundFontWithLang = false; for (int i = 0; i < faces->nfont; i++) { FcPattern* font = faces->fonts[i]; FcChar8* mappedGeneric = nullptr; FcPatternGetString(font, FC_FAMILY, 0, &mappedGeneric); if (mappedGeneric) { nsAutoCString mappedGenericName(ToCharPtr(mappedGeneric)); AutoTArray genericFamilies; if (gfxPlatformFontList::FindAndAddFamilies( StyleGenericFontFamily::None, mappedGenericName, &genericFamilies, FindFamiliesFlags(0))) { MOZ_ASSERT(genericFamilies.Length() == 1, "expected a single family"); if (!prefFonts->Contains(genericFamilies[0].mFamily)) { prefFonts->AppendElement(genericFamilies[0].mFamily); bool foundLang = !fcLang.IsEmpty() && PatternHasLang(font, ToFcChar8Ptr(fcLang.get())); foundFontWithLang = foundFontWithLang || foundLang; // check to see if the list is full if (prefFonts->Length() >= limit) { break; } } } } } // if no font in the list matches the lang, trim all but the first one if (!prefFonts->IsEmpty() && !foundFontWithLang) { prefFonts->TruncateLength(1); } mGenericMappings.Put(genericLang, prefFonts); return prefFonts; } bool gfxFcPlatformFontList::PrefFontListsUseOnlyGenerics() { static const char kFontNamePrefix[] = "font.name."; bool prefFontsUseOnlyGenerics = true; nsTArray names; nsresult rv = Preferences::GetRootBranch()->GetChildList(kFontNamePrefix, names); if (NS_SUCCEEDED(rv)) { for (auto& name : names) { // Check whether all font.name prefs map to generic keywords // and that the pref name and keyword match. // Ex: font.name.serif.ar ==> "serif" (ok) // Ex: font.name.serif.ar ==> "monospace" (return false) // Ex: font.name.serif.ar ==> "DejaVu Serif" (return false) // Ex: font.name.serif.ar ==> "" and // font.name-list.serif.ar ==> "serif" (ok) // Ex: font.name.serif.ar ==> "" and // font.name-list.serif.ar ==> "Something, serif" // (return false) nsDependentCSubstring prefName = Substring(name, ArrayLength(kFontNamePrefix) - 1); nsCCharSeparatedTokenizer tokenizer(prefName, '.'); const nsDependentCSubstring& generic = tokenizer.nextToken(); const nsDependentCSubstring& langGroup = tokenizer.nextToken(); nsAutoCString fontPrefValue; Preferences::GetCString(name.get(), fontPrefValue); if (fontPrefValue.IsEmpty()) { // The font name list may have two or more family names as comma // separated list. In such case, not matching with generic font // name is fine because if the list prefers specific font, this // should return false. Preferences::GetCString(NameListPref(generic, langGroup).get(), fontPrefValue); } if (!langGroup.EqualsLiteral("x-math") && !generic.Equals(fontPrefValue)) { prefFontsUseOnlyGenerics = false; break; } } } return prefFontsUseOnlyGenerics; } /* static */ void gfxFcPlatformFontList::CheckFontUpdates(nsITimer* aTimer, void* aThis) { // A content process is not supposed to check this directly; // it will be notified by the parent when the font list changes. MOZ_ASSERT(XRE_IsParentProcess()); // check for font updates FcInitBringUptoDate(); // update fontlist if current config changed gfxFcPlatformFontList* pfl = static_cast(aThis); FcConfig* current = FcConfigGetCurrent(); if (current != pfl->GetLastConfig()) { pfl->UpdateFontList(); pfl->ForceGlobalReflow(); mozilla::dom::ContentParent::NotifyUpdatedFonts(true); } } gfxFontFamily* gfxFcPlatformFontList::CreateFontFamily( const nsACString& aName, FontVisibility aVisibility) const { return new gfxFontconfigFontFamily(aName, aVisibility); } // mapping of moz lang groups ==> default lang struct MozLangGroupData { nsAtom* const& mozLangGroup; const char* defaultLang; }; const MozLangGroupData MozLangGroups[] = { {nsGkAtoms::x_western, "en"}, {nsGkAtoms::x_cyrillic, "ru"}, {nsGkAtoms::x_devanagari, "hi"}, {nsGkAtoms::x_tamil, "ta"}, {nsGkAtoms::x_armn, "hy"}, {nsGkAtoms::x_beng, "bn"}, {nsGkAtoms::x_cans, "iu"}, {nsGkAtoms::x_ethi, "am"}, {nsGkAtoms::x_geor, "ka"}, {nsGkAtoms::x_gujr, "gu"}, {nsGkAtoms::x_guru, "pa"}, {nsGkAtoms::x_khmr, "km"}, {nsGkAtoms::x_knda, "kn"}, {nsGkAtoms::x_mlym, "ml"}, {nsGkAtoms::x_orya, "or"}, {nsGkAtoms::x_sinh, "si"}, {nsGkAtoms::x_tamil, "ta"}, {nsGkAtoms::x_telu, "te"}, {nsGkAtoms::x_tibt, "bo"}, {nsGkAtoms::Unicode, 0}}; bool gfxFcPlatformFontList::TryLangForGroup(const nsACString& aOSLang, nsAtom* aLangGroup, nsACString& aFcLang, bool aForFontEnumerationThread) { // Truncate at '.' or '@' from aOSLang, and convert '_' to '-'. // aOSLang is in the form "language[_territory][.codeset][@modifier]". // fontconfig takes languages in the form "language-territory". // nsLanguageAtomService takes languages in the form language-subtag, // where subtag may be a territory. fontconfig and nsLanguageAtomService // handle case-conversion for us. const char *pos, *end; aOSLang.BeginReading(pos); aOSLang.EndReading(end); aFcLang.Truncate(); while (pos < end) { switch (*pos) { case '.': case '@': end = pos; break; case '_': aFcLang.Append('-'); break; default: aFcLang.Append(*pos); } ++pos; } if (!aForFontEnumerationThread) { nsAtom* atom = mLangService->LookupLanguage(aFcLang); return atom == aLangGroup; } // If we were called by the font enumeration thread, we can't use // mLangService->LookupLanguage because it is not thread-safe. // Use GetUncachedLanguageGroup to avoid unsafe access to the lang-group // mapping cache hashtable. nsAutoCString lowered(aFcLang); ToLowerCase(lowered); RefPtr lang = NS_Atomize(lowered); RefPtr group = mLangService->GetUncachedLanguageGroup(lang); return group.get() == aLangGroup; } void gfxFcPlatformFontList::GetSampleLangForGroup( nsAtom* aLanguage, nsACString& aLangStr, bool aForFontEnumerationThread) { aLangStr.Truncate(); if (!aLanguage) { return; } // set up lang string const MozLangGroupData* mozLangGroup = nullptr; // -- look it up in the list of moz lang groups for (unsigned int i = 0; i < ArrayLength(MozLangGroups); ++i) { if (aLanguage == MozLangGroups[i].mozLangGroup) { mozLangGroup = &MozLangGroups[i]; break; } } // -- not a mozilla lang group? Just return the BCP47 string // representation of the lang group if (!mozLangGroup) { // Not a special mozilla language group. // Use aLanguage as a language code. aLanguage->ToUTF8String(aLangStr); return; } // -- check the environment for the user's preferred language that // corresponds to this mozilla lang group. const char* languages = getenv("LANGUAGE"); if (languages) { const char separator = ':'; for (const char* pos = languages; true; ++pos) { if (*pos == '\0' || *pos == separator) { if (languages < pos && TryLangForGroup(Substring(languages, pos), aLanguage, aLangStr, aForFontEnumerationThread)) { return; } if (*pos == '\0') { break; } languages = pos + 1; } } } const char* ctype = setlocale(LC_CTYPE, nullptr); if (ctype && TryLangForGroup(nsDependentCString(ctype), aLanguage, aLangStr, aForFontEnumerationThread)) { return; } if (mozLangGroup->defaultLang) { aLangStr.Assign(mozLangGroup->defaultLang); } else { aLangStr.Truncate(); } } #ifdef MOZ_BUNDLED_FONTS void gfxFcPlatformFontList::ActivateBundledFonts() { if (!mBundledFontsInitialized) { mBundledFontsInitialized = true; nsCOMPtr localDir; nsresult rv = NS_GetSpecialDirectory(NS_GRE_DIR, getter_AddRefs(localDir)); if (NS_FAILED(rv)) { return; } if (NS_FAILED(localDir->Append(u"fonts"_ns))) { return; } bool isDir; if (NS_FAILED(localDir->IsDirectory(&isDir)) || !isDir) { return; } if (NS_FAILED(localDir->GetNativePath(mBundledFontsPath))) { return; } } if (!mBundledFontsPath.IsEmpty()) { FcConfigAppFontAddDir(nullptr, ToFcChar8Ptr(mBundledFontsPath.get())); } } #endif #ifdef MOZ_WIDGET_GTK /*************************************************************************** * * This function must be last in the file because it uses the system cairo * library. Above this point the cairo library used is the tree cairo if * MOZ_TREE_CAIRO. */ # if MOZ_TREE_CAIRO // Tree cairo symbols have different names. Disable their activation through // preprocessor macros. # undef cairo_ft_font_options_substitute // The system cairo functions are not declared because the include paths cause // the gdk headers to pick up the tree cairo.h. extern "C" { NS_VISIBILITY_DEFAULT void cairo_ft_font_options_substitute( const cairo_font_options_t* options, FcPattern* pattern); } # endif static void ApplyGdkScreenFontOptions(FcPattern* aPattern) { const cairo_font_options_t* options = gdk_screen_get_font_options(gdk_screen_get_default()); cairo_ft_font_options_substitute(options, aPattern); } #endif // MOZ_WIDGET_GTK