/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- * 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/Preferences.h" #include "mozilla/Sprintf.h" #include "mozilla/TimeStamp.h" #include "nsGkAtoms.h" #include "nsILanguageAtomService.h" #include "nsUnicodeProperties.h" #include "nsUnicodeRange.h" #include "nsDirectoryServiceUtils.h" #include "nsDirectoryServiceDefs.h" #include "nsAppDirectoryServiceDefs.h" #include "nsCharSeparatedTokenizer.h" #include "mozilla/gfx/HelpersCairo.h" #include #ifdef MOZ_WIDGET_GTK #include #include "gfxPlatformGtk.h" #endif #ifdef MOZ_X11 #include "mozilla/X11Util.h" #endif using namespace mozilla; using namespace mozilla::unicode; #ifndef FC_POSTSCRIPT_NAME #define FC_POSTSCRIPT_NAME "postscriptname" /* String */ #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); } FT_Library gfxFcPlatformFontList::sCairoFTLibrary = nullptr; static cairo_user_data_key_t sFcFontlistUserFontDataKey; // 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 nsAString& aFamilyName, nsAString& aPostscriptName, nsAString& aFullname) { // get the Postscript name FcChar8* psname; if (FcPatternGetString(aFont, FC_POSTSCRIPT_NAME, 0, &psname) == FcResultMatch) { AppendUTF8toUTF16(ToCharPtr(psname), aPostscriptName); } // 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) { AppendUTF8toUTF16(ToCharPtr(fullname), aFullname); } // if have fullname, done if (!aFullname.IsEmpty()) { return; } // otherwise, set the fullname to family + style name [en] and use that aFullname.Append(aFamilyName); // figure out the en style name en = FindCanonicalNameIndex(aFont, FC_STYLELANG); nsAutoString style; FcChar8* stylename = nullptr; FcPatternGetString(aFont, FC_STYLE, en, &stylename); if (stylename) { AppendUTF8toUTF16(ToCharPtr(stylename), style); } if (!style.IsEmpty() && !style.EqualsLiteral("Regular")) { aFullname.Append(' '); aFullname.Append(style); } } static uint16_t MapFcWeight(int aFcWeight) { if (aFcWeight <= (FC_WEIGHT_THIN + FC_WEIGHT_EXTRALIGHT) / 2) { return 100; } else if (aFcWeight <= (FC_WEIGHT_EXTRALIGHT + FC_WEIGHT_LIGHT) / 2) { return 200; } else if (aFcWeight <= (FC_WEIGHT_LIGHT + FC_WEIGHT_BOOK) / 2) { return 300; } else if (aFcWeight <= (FC_WEIGHT_REGULAR + FC_WEIGHT_MEDIUM) / 2) { // This includes FC_WEIGHT_BOOK return 400; } else if (aFcWeight <= (FC_WEIGHT_MEDIUM + FC_WEIGHT_DEMIBOLD) / 2) { return 500; } else if (aFcWeight <= (FC_WEIGHT_DEMIBOLD + FC_WEIGHT_BOLD) / 2) { return 600; } else if (aFcWeight <= (FC_WEIGHT_BOLD + FC_WEIGHT_EXTRABOLD) / 2) { return 700; } else if (aFcWeight <= (FC_WEIGHT_EXTRABOLD + FC_WEIGHT_BLACK) / 2) { return 800; } else if (aFcWeight <= FC_WEIGHT_BLACK) { return 900; } // including FC_WEIGHT_EXTRABLACK return 901; } static int16_t MapFcWidth(int aFcWidth) { if (aFcWidth <= (FC_WIDTH_ULTRACONDENSED + FC_WIDTH_EXTRACONDENSED) / 2) { return NS_FONT_STRETCH_ULTRA_CONDENSED; } if (aFcWidth <= (FC_WIDTH_EXTRACONDENSED + FC_WIDTH_CONDENSED) / 2) { return NS_FONT_STRETCH_EXTRA_CONDENSED; } if (aFcWidth <= (FC_WIDTH_CONDENSED + FC_WIDTH_SEMICONDENSED) / 2) { return NS_FONT_STRETCH_CONDENSED; } if (aFcWidth <= (FC_WIDTH_SEMICONDENSED + FC_WIDTH_NORMAL) / 2) { return NS_FONT_STRETCH_SEMI_CONDENSED; } if (aFcWidth <= (FC_WIDTH_NORMAL + FC_WIDTH_SEMIEXPANDED) / 2) { return NS_FONT_STRETCH_NORMAL; } if (aFcWidth <= (FC_WIDTH_SEMIEXPANDED + FC_WIDTH_EXPANDED) / 2) { return NS_FONT_STRETCH_SEMI_EXPANDED; } if (aFcWidth <= (FC_WIDTH_EXPANDED + FC_WIDTH_EXTRAEXPANDED) / 2) { return NS_FONT_STRETCH_EXPANDED; } if (aFcWidth <= (FC_WIDTH_EXTRAEXPANDED + FC_WIDTH_ULTRAEXPANDED) / 2) { return NS_FONT_STRETCH_EXTRA_EXPANDED; } return NS_FONT_STRETCH_ULTRA_EXPANDED; } gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsAString& aFaceName, FcPattern* aFontPattern, bool aIgnoreFcCharmap) : gfxFontEntry(aFaceName), mFontPattern(aFontPattern), mFTFace(nullptr), mFTFaceInitialized(false), mIgnoreFcCharmap(aIgnoreFcCharmap), mAspect(0.0), mFontData(nullptr) { // italic int slant; if (FcPatternGetInteger(aFontPattern, FC_SLANT, 0, &slant) != FcResultMatch) { slant = FC_SLANT_ROMAN; } if (slant == FC_SLANT_OBLIQUE) { mStyle = NS_FONT_STYLE_OBLIQUE; } else if (slant > 0) { mStyle = NS_FONT_STYLE_ITALIC; } // weight int weight; if (FcPatternGetInteger(aFontPattern, FC_WEIGHT, 0, &weight) != FcResultMatch) { weight = FC_WEIGHT_REGULAR; } mWeight = MapFcWeight(weight); // width int width; if (FcPatternGetInteger(aFontPattern, FC_WIDTH, 0, &width) != FcResultMatch) { width = FC_WIDTH_NORMAL; } mStretch = MapFcWidth(width); } gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsAString& aFaceName, uint16_t aWeight, int16_t aStretch, uint8_t aStyle, const uint8_t *aData, FT_Face aFace) : gfxFontEntry(aFaceName), mFTFace(aFace), mFTFaceInitialized(true), mIgnoreFcCharmap(true), mAspect(0.0), mFontData(aData) { mWeight = aWeight; mStyle = aStyle; mStretch = aStretch; mIsDataUserFont = true; // 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. mFontPattern = FcFreeTypeQueryFace(mFTFace, ToFcChar8Ptr(""), 0, nullptr); // given that we have a FT_Face, not really sure this is possible... if (!mFontPattern) { mFontPattern = FcPatternCreate(); } FcPatternDel(mFontPattern, FC_FILE); FcPatternDel(mFontPattern, FC_INDEX); // Make a new pattern and store the face in it so that cairo uses // that when creating a cairo font face. FcPatternAddFTFace(mFontPattern, FC_FT_FACE, mFTFace); mUserFontData = new FTUserFontData(mFTFace, mFontData); } gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsAString& aFaceName, FcPattern* aFontPattern, uint16_t aWeight, int16_t aStretch, uint8_t aStyle) : gfxFontEntry(aFaceName), mFontPattern(aFontPattern), mFTFace(nullptr), mFTFaceInitialized(false), mAspect(0.0), mFontData(nullptr) { mWeight = aWeight; mStyle = aStyle; mStretch = 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; } gfxFontconfigFontEntry::~gfxFontconfigFontEntry() { } 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 gfxFontconfigFontEntry::SupportsLangGroup(nsIAtom *aLangGroup) const { if (!aLangGroup || aLangGroup == nsGkAtoms::Unicode) { return true; } nsAutoCString fcLang; gfxFcPlatformFontList* pfl = gfxFcPlatformFontList::PlatformFontList(); pfl->GetSampleLangForGroup(aLangGroup, fcLang); if (fcLang.IsEmpty()) { return true; } // is lang included in the underlying pattern? return PatternHasLang(mFontPattern, ToFcChar8Ptr(fcLang.get())); } nsresult gfxFontconfigFontEntry::ReadCMAP(FontInfoData *aFontInfoData) { // attempt this once, if errors occur leave a blank cmap if (mCharacterMap) { return NS_OK; } RefPtr charmap; nsresult rv; bool symbolFont = false; // currently ignored if (aFontInfoData && (charmap = GetCMAPFromFontInfo(aFontInfoData, mUVSOffset, symbolFont))) { rv = NS_OK; } else { uint32_t kCMAP = TRUETYPE_TAG('c','m','a','p'); charmap = new gfxCharacterMap(); AutoTable cmapTable(this, kCMAP); if (cmapTable) { bool unicodeFont = false; // currently ignored uint32_t cmapLen; const uint8_t* cmapData = reinterpret_cast(hb_blob_get_data(cmapTable, &cmapLen)); rv = gfxFontUtils::ReadCMAP(cmapData, cmapLen, *charmap, mUVSOffset, unicodeFont, symbolFont); } else { rv = NS_ERROR_NOT_AVAILABLE; } } mHasCmapTable = NS_SUCCEEDED(rv); if (mHasCmapTable) { gfxPlatformFontList *pfl = gfxPlatformFontList::PlatformFontList(); mCharacterMap = pfl->FindCharMap(charmap); } else { // if error occurred, initialize to null cmap mCharacterMap = new gfxCharacterMap(); } LOG_FONTLIST(("(fontlist-cmap) name: %s, size: %d hash: %8.8x%s\n", NS_ConvertUTF16toUTF8(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", NS_ConvertUTF16toUTF8(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); } hb_blob_t* gfxFontconfigFontEntry::GetFontTable(uint32_t aTableTag) { // for data fonts, read directly from the font data if (mFontData) { return gfxFontUtils::GetTableFromFontData(mFontData, aTableTag); } return gfxFontEntry::GetFontTable(aTableTag); } void gfxFontconfigFontEntry::MaybeReleaseFTFace() { // don't release if either HB or Gr face still exists if (mHBFace || mGrFace) { return; } // only close out FT_Face for system fonts, not for data fonts if (!mIsDataUserFont) { if (mFTFace) { FT_Done_Face(mFTFace); mFTFace = nullptr; } mFTFaceInitialized = false; } } void gfxFontconfigFontEntry::ForgetHBFace() { gfxFontEntry::ForgetHBFace(); MaybeReleaseFTFace(); } void gfxFontconfigFontEntry::ReleaseGrFace(gr_face* aFace) { gfxFontEntry::ReleaseGrFace(aFace); MaybeReleaseFTFace(); } double gfxFontconfigFontEntry::GetAspect() { if (mAspect == 0.0) { // default to aspect = 0.5 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, false); if (font) { const gfxFont::Metrics& metrics = font->GetMetrics(gfxFont::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, cairo_font_options_t* aFontOptions) { NS_ASSERTION(aFontOptions, "null font options passed to PrepareFontOptions"); // 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 for // SetupCairoFont (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. if (printing) { cairo_font_options_set_hint_metrics(aFontOptions, CAIRO_HINT_METRICS_OFF); } else { cairo_font_options_set_hint_metrics(aFontOptions, 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; } cairo_hint_style_t hint_style; if (printing || !hinting) { hint_style = CAIRO_HINT_STYLE_NONE; } else { int fc_hintstyle; if (FcPatternGetInteger(aPattern, FC_HINT_STYLE, 0, &fc_hintstyle) != FcResultMatch) { fc_hintstyle = FC_HINT_FULL; } switch (fc_hintstyle) { case FC_HINT_NONE: hint_style = CAIRO_HINT_STYLE_NONE; break; case FC_HINT_SLIGHT: hint_style = CAIRO_HINT_STYLE_SLIGHT; break; case FC_HINT_MEDIUM: default: // This fallback mirrors _get_pattern_ft_options in cairo. hint_style = CAIRO_HINT_STYLE_MEDIUM; break; case FC_HINT_FULL: hint_style = CAIRO_HINT_STYLE_FULL; break; } } cairo_font_options_set_hint_style(aFontOptions, hint_style); int rgba; if (FcPatternGetInteger(aPattern, FC_RGBA, 0, &rgba) != FcResultMatch) { rgba = FC_RGBA_UNKNOWN; } cairo_subpixel_order_t subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT; switch (rgba) { case FC_RGBA_UNKNOWN: case FC_RGBA_NONE: default: // There is no CAIRO_SUBPIXEL_ORDER_NONE. Subpixel antialiasing // is disabled through cairo_antialias_t. rgba = FC_RGBA_NONE; // subpixel_order won't be used by the font as we won't use // CAIRO_ANTIALIAS_SUBPIXEL, but don't leave it at default for // caching reasons described above. Fall through: MOZ_FALLTHROUGH; case FC_RGBA_RGB: subpixel_order = CAIRO_SUBPIXEL_ORDER_RGB; break; case FC_RGBA_BGR: subpixel_order = CAIRO_SUBPIXEL_ORDER_BGR; break; case FC_RGBA_VRGB: subpixel_order = CAIRO_SUBPIXEL_ORDER_VRGB; break; case FC_RGBA_VBGR: subpixel_order = CAIRO_SUBPIXEL_ORDER_VBGR; break; } cairo_font_options_set_subpixel_order(aFontOptions, subpixel_order); FcBool fc_antialias; if (FcPatternGetBool(aPattern, FC_ANTIALIAS, 0, &fc_antialias) != FcResultMatch) { fc_antialias = FcTrue; } cairo_antialias_t antialias; if (!fc_antialias) { antialias = CAIRO_ANTIALIAS_NONE; } else if (rgba == FC_RGBA_NONE) { antialias = CAIRO_ANTIALIAS_GRAY; } else { antialias = CAIRO_ANTIALIAS_SUBPIXEL; } cairo_font_options_set_antialias(aFontOptions, antialias); } cairo_scaled_font_t* gfxFontconfigFontEntry::CreateScaledFont(FcPattern* aRenderPattern, gfxFloat aAdjustedSize, const gfxFontStyle *aStyle, bool aNeedsBold) { if (aNeedsBold) { FcPatternAddBool(aRenderPattern, FC_EMBOLDEN, FcTrue); } // synthetic oblique by skewing via the font matrix bool needsOblique = IsUpright() && aStyle->style != NS_FONT_STYLE_NORMAL && aStyle->allowSyntheticStyle; if (needsOblique) { // disable embedded bitmaps (mimics behavior in 90-synthetic.conf) FcPatternDel(aRenderPattern, FC_EMBEDDED_BITMAP); FcPatternAddBool(aRenderPattern, FC_EMBEDDED_BITMAP, FcFalse); } cairo_font_face_t *face = cairo_ft_font_face_create_for_pattern(aRenderPattern); if (mFontData) { // for data fonts, add the face/data pointer to the cairo font face // so that it gets deleted whenever cairo decides NS_ASSERTION(mFTFace, "FT_Face is null when setting user data"); NS_ASSERTION(mUserFontData, "user font data is null when setting user data"); cairo_font_face_set_user_data(face, &sFcFontlistUserFontDataKey, new FTUserFontDataRef(mUserFontData), FTUserFontDataRef::Destroy); } cairo_scaled_font_t *scaledFont = nullptr; cairo_matrix_t sizeMatrix; cairo_matrix_t identityMatrix; cairo_matrix_init_scale(&sizeMatrix, aAdjustedSize, aAdjustedSize); cairo_matrix_init_identity(&identityMatrix); if (needsOblique) { const double kSkewFactor = OBLIQUE_SKEW_FACTOR; cairo_matrix_t style; cairo_matrix_init(&style, 1, //xx 0, //yx -1 * kSkewFactor, //xy 1, //yy 0, //x0 0); //y0 cairo_matrix_multiply(&sizeMatrix, &sizeMatrix, &style); } cairo_font_options_t *fontOptions = cairo_font_options_create(); PrepareFontOptions(aRenderPattern, fontOptions); scaledFont = cairo_scaled_font_create(face, &sizeMatrix, &identityMatrix, fontOptions); cairo_font_options_destroy(fontOptions); NS_ASSERTION(cairo_scaled_font_status(scaledFont) == CAIRO_STATUS_SUCCESS, "Failed to make scaled font"); cairo_font_face_destroy(face); return scaledFont; } #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 { #ifdef MOZ_WIDGET_GTK ApplyGdkScreenFontOptions(aPattern); #endif #ifdef MOZ_X11 FcValue value; int lcdfilter; if (FcPatternGet(aPattern, FC_LCD_FILTER, 0, &value) == FcResultNoMatch && GetXftInt(DefaultXDisplay(), "lcdfilter", &lcdfilter)) { FcPatternAddInteger(aPattern, FC_LCD_FILTER, lcdfilter); } #endif } FcDefaultSubstitute(aPattern); } 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, bool aNeedsBold) { nsAutoRef pattern(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); PreparePattern(pattern, aFontStyle->printerFont); nsAutoRef renderPattern (FcFontRenderPrepare(nullptr, pattern, mFontPattern)); if (!renderPattern) { NS_WARNING("Failed to prepare Fontconfig pattern for font instance"); return nullptr; } cairo_scaled_font_t* scaledFont = CreateScaledFont(renderPattern, size, aFontStyle, aNeedsBold); gfxFont* newFont = new gfxFontconfigFont(scaledFont, renderPattern, size, this, aFontStyle, aNeedsBold); cairo_scaled_font_destroy(scaledFont); return newFont; } nsresult gfxFontconfigFontEntry::CopyFontTable(uint32_t aTableTag, nsTArray& aBuffer) { NS_ASSERTION(!mIsDataUserFont, "data fonts should be reading tables directly from memory"); if (!mFTFaceInitialized) { mFTFaceInitialized = true; FcChar8 *filename; if (FcPatternGetString(mFontPattern, FC_FILE, 0, &filename) != FcResultMatch) { return NS_ERROR_FAILURE; } int index; if (FcPatternGetInteger(mFontPattern, FC_INDEX, 0, &index) != FcResultMatch) { index = 0; // default to 0 if not found in pattern } if (FT_New_Face(gfxFcPlatformFontList::GetFTLibrary(), (const char*)filename, index, &mFTFace) != 0) { return NS_ERROR_FAILURE; } } if (!mFTFace) { return NS_ERROR_NOT_AVAILABLE; } FT_ULong length = 0; if (FT_Load_Sfnt_Table(mFTFace, aTableTag, 0, nullptr, &length) != 0) { return NS_ERROR_NOT_AVAILABLE; } if (!aBuffer.SetLength(length, fallible)) { return NS_ERROR_OUT_OF_MEMORY; } if (FT_Load_Sfnt_Table(mFTFace, aTableTag, 0, aBuffer.Elements(), &length) != 0) { aBuffer.Clear(); return NS_ERROR_FAILURE; } return NS_OK; } 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 nsAutoString psname, fullname; GetFaceNames(face, mName, psname, fullname); const nsAutoString& faceName = !psname.IsEmpty() ? psname : fullname; gfxFontconfigFontEntry *fontEntry = new gfxFontconfigFontEntry(faceName, face, mContainsAppFonts); AddFontEntry(fontEntry); if (fontEntry->IsUpright() && fontEntry->Weight() == NS_FONT_WEIGHT_NORMAL && fontEntry->Stretch() == NS_FONT_STRETCH_NORMAL) { numRegularFaces++; } if (LOG_FONTLIST_ENABLED()) { LOG_FONTLIST(("(fontlist) added (%s) to family (%s)" " with style: %s weight: %d stretch: %d" " psname: %s fullname: %s", NS_ConvertUTF16toUTF8(fontEntry->Name()).get(), NS_ConvertUTF16toUTF8(Name()).get(), (fontEntry->IsItalic()) ? "italic" : (fontEntry->IsOblique() ? "oblique" : "normal"), fontEntry->Weight(), fontEntry->Stretch(), NS_ConvertUTF16toUTF8(psname).get(), NS_ConvertUTF16toUTF8(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); } 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; } } nsCountedRef pattern(aFontPattern); mFontPatterns.AppendElement(pattern); } 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& aNeedsSyntheticBold) { gfxFontFamily::FindAllFontsForStyle(aFontStyle, aFontEntryList, aNeedsSyntheticBold); 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 tolernace, 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); // 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->mStyle != entry->mStyle) { // 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); } } gfxFontconfigFont::gfxFontconfigFont(cairo_scaled_font_t *aScaledFont, FcPattern *aPattern, gfxFloat aAdjustedSize, gfxFontEntry *aFontEntry, const gfxFontStyle *aFontStyle, bool aNeedsBold) : gfxFontconfigFontBase(aScaledFont, aPattern, aFontEntry, aFontStyle) { mAdjustedSize = aAdjustedSize; } gfxFontconfigFont::~gfxFontconfigFont() { } gfxFcPlatformFontList::gfxFcPlatformFontList() : mLocalNames(64) , mGenericMappings(32) , mFcSubstituteCache(64) , mLastConfig(nullptr) , mAlwaysUseFontconfigGenerics(true) { // if the rescan interval is set, start the timer int rescanInterval = FcConfigGetRescanInterval(nullptr); if (rescanInterval) { mLastConfig = FcConfigGetCurrent(); mCheckFontUpdatesTimer = do_CreateInstance("@mozilla.org/timer;1"); if (mCheckFontUpdatesTimer) { mCheckFontUpdatesTimer-> InitWithFuncCallback(CheckFontUpdates, this, (rescanInterval + 1) * 1000, nsITimer::TYPE_REPEATING_SLACK); } else { 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, bool aAppFonts) { // This iterates over the fonts in a font set and adds in gfxFontFamily // objects for each family. The patterns for individual fonts are not // copied here. When a family is actually used, the fonts in the family // are enumerated and the patterns copied. Note that we're explicitly // excluding non-scalable fonts such as X11 bitmap fonts, which // Chrome Skia/Webkit code does also. if (!aFontSet) { NS_WARNING("AddFontSetFamilies called with a null font set."); return; } FcChar8* lastFamilyName = (FcChar8*)""; RefPtr fontFamily; nsAutoString familyName; for (int f = 0; f < aFontSet->nfont; f++) { FcPattern* font = aFontSet->fonts[f]; // get canonical name uint32_t cIndex = FindCanonicalNameIndex(font, FC_FAMILYLANG); FcChar8* canonical = nullptr; FcPatternGetString(font, FC_FAMILY, cIndex, &canonical); if (!canonical) { continue; } // same as the last one? no need to add a new family, skip if (FcStrCmp(canonical, lastFamilyName) != 0) { lastFamilyName = canonical; // add new family if one doesn't already exist familyName.Truncate(); AppendUTF8toUTF16(ToCharPtr(canonical), familyName); nsAutoString keyName(familyName); ToLowerCase(keyName); fontFamily = static_cast (mFontFamilies.GetWeak(keyName)); if (!fontFamily) { fontFamily = new gfxFontconfigFontFamily(familyName); mFontFamilies.Put(keyName, fontFamily); } // 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) { fontFamily->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(font, FC_FAMILY, n, &otherName) == FcResultMatch) { NS_ConvertUTF8toUTF16 otherFamilyName(ToCharPtr(otherName)); AddOtherFamilyName(fontFamily, otherFamilyName); n++; if (n == int(cIndex)) { n++; // skip over canonical name } } } NS_ASSERTION(fontFamily, "font must belong to a font family"); fontFamily->AddFontPattern(font); // map the psname, fullname ==> font family for local font lookups nsAutoString psname, fullname; GetFaceNames(font, familyName, psname, fullname); if (!psname.IsEmpty()) { ToLowerCase(psname); mLocalNames.Put(psname, font); } if (!fullname.IsEmpty()) { ToLowerCase(fullname); mLocalNames.Put(fullname, font); } } } nsresult gfxFcPlatformFontList::InitFontListForPlatform() { mLastConfig = FcConfigGetCurrent(); mLocalNames.Clear(); mFcSubstituteCache.Clear(); // iterate over available fonts FcFontSet* systemFonts = FcConfigGetFonts(nullptr, FcSetSystem); AddFontSetFamilies(systemFonts, /* aAppFonts = */ false); mAlwaysUseFontconfigGenerics = PrefFontListsUseOnlyGenerics(); #ifdef MOZ_BUNDLED_FONTS ActivateBundledFonts(); FcFontSet* appFonts = FcConfigGetFonts(nullptr, FcSetApplication); AddFontSetFamilies(appFonts, /* aAppFonts = */ true); #endif mOtherFamilyNamesInitialized = true; return NS_OK; } // 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, nsIAtom *aLangGroup) { aListOfFonts.Clear(); nsAutoRef pat(FcPatternCreate()); if (!pat) { return; } nsAutoRef os(FcObjectSetBuild(FC_FAMILY, nullptr)); if (!os) { return; } // add the lang to the pattern nsAutoCString fcLang; gfxFcPlatformFontList* pfl = gfxFcPlatformFontList::PlatformFontList(); pfl->GetSampleLangForGroup(aLangGroup, fcLang); if (!fcLang.IsEmpty()) { FcPatternAddString(pat, FC_LANG, ToFcChar8Ptr(fcLang.get())); } nsAutoRef fs(FcFontList(nullptr, pat, os)); 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(family, strFamily); if (aListOfFonts.Contains(strFamily)) { continue; } aListOfFonts.AppendElement(strFamily); } aListOfFonts.Sort(); } void gfxFcPlatformFontList::GetFontList(nsIAtom *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 NS_NOTREACHED("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, NS_LITERAL_STRING("monospace")); if (sansSerif) aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("sans-serif")); if (serif) aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("serif")); } gfxFontFamily* gfxFcPlatformFontList::GetDefaultFontForPlatform(const gfxFontStyle* aStyle) { // 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(NS_LITERAL_STRING("-moz-default"), aStyle->language); NS_ASSERTION(prefFonts, "null list of generic fonts"); if (prefFonts && !prefFonts->IsEmpty()) { return (*prefFonts)[0]; } return nullptr; } gfxFontEntry* gfxFcPlatformFontList::LookupLocalFont(const nsAString& aFontName, uint16_t aWeight, int16_t aStretch, uint8_t aStyle) { nsAutoString keyName(aFontName); ToLowerCase(keyName); // if name is not in the global list, done FcPattern* fontPattern = mLocalNames.Get(keyName); if (!fontPattern) { return nullptr; } return new gfxFontconfigFontEntry(aFontName, fontPattern, aWeight, aStretch, aStyle); } gfxFontEntry* gfxFcPlatformFontList::MakePlatformFont(const nsAString& aFontName, uint16_t aWeight, int16_t aStretch, uint8_t aStyle, const uint8_t* aFontData, uint32_t aLength) { FT_Face face; FT_Error error = FT_New_Memory_Face(gfxFcPlatformFontList::GetFTLibrary(), aFontData, aLength, 0, &face); if (error != FT_Err_Ok) { NS_Free((void*)aFontData); return nullptr; } if (FT_Err_Ok != FT_Select_Charmap(face, FT_ENCODING_UNICODE)) { FT_Done_Face(face); NS_Free((void*)aFontData); return nullptr; } return new gfxFontconfigFontEntry(aFontName, aWeight, aStretch, aStyle, aFontData, face); } bool gfxFcPlatformFontList::FindAndAddFamilies(const nsAString& aFamily, nsTArray* aOutput, gfxFontStyle* aStyle, gfxFloat aDevToCssSize) { nsAutoString familyName(aFamily); ToLowerCase(familyName); nsIAtom* language = (aStyle ? aStyle->language.get() : nullptr); // 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, language); 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: NS_ConvertUTF16toUTF8 familyToFind(familyName); AutoTArray cachedFamilies; if (mFcSubstituteCache.Get(familyToFind, &cachedFamilies)) { 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; nsAutoRef sentinelSubst(FcPatternCreate()); FcPatternAddString(sentinelSubst, FC_FAMILY, kSentinelName); FcConfigSubstitute(nullptr, sentinelSubst, FcMatchPattern); FcPatternGetString(sentinelSubst, FC_FAMILY, 0, &sentinelFirstFamily); // substitutions for font, -moz-sentinel pattern nsAutoRef fontWithSentinel(FcPatternCreate()); FcPatternAddString(fontWithSentinel, FC_FAMILY, ToFcChar8Ptr(familyToFind.get())); FcPatternAddString(fontWithSentinel, FC_FAMILY, kSentinelName); FcConfigSubstitute(nullptr, fontWithSentinel, FcMatchPattern); // Add all font family matches until reaching the sentinel. FcChar8* substName = nullptr; for (int i = 0; FcPatternGetString(fontWithSentinel, FC_FAMILY, i, &substName) == FcResultMatch; i++) { NS_ConvertUTF8toUTF16 subst(ToCharPtr(substName)); if (sentinelFirstFamily && FcStrCmp(substName, sentinelFirstFamily) == 0) { break; } gfxPlatformFontList::FindAndAddFamilies(subst, &cachedFamilies); } // Cache the resulting list, so we don't have to do this again. mFcSubstituteCache.Put(familyToFind, cachedFamilies); if (cachedFamilies.IsEmpty()) { return false; } aOutput->AppendElements(cachedFamilies); return true; } bool gfxFcPlatformFontList::GetStandardFamilyName(const nsAString& aFontName, nsAString& 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; } nsAutoRef pat(FcPatternCreate()); if (!pat) { return true; } nsAutoRef os(FcObjectSetBuild(FC_FAMILY, nullptr)); if (!os) { return true; } // add the family name to the pattern NS_ConvertUTF16toUTF8 familyName(aFontName); FcPatternAddString(pat, FC_FAMILY, ToFcChar8Ptr(familyName.get())); nsAutoRef givenFS(FcFontList(nullptr, pat, os)); 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 (familyName.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()); nsAutoRef candidateFS(FcFontList(nullptr, pat, os)); 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) { AppendUTF8toUTF16(candidates[j], aFamilyName); return true; } } // didn't find localized name, leave family name blank return true; } static const char kFontNamePrefix[] = "font.name."; void gfxFcPlatformFontList::AddGenericFonts(mozilla::FontFamilyType aGenericType, nsIAtom* aLanguage, nsTArray& aFamilyList) { bool usePrefFontList = false; // treat -moz-fixed as monospace if (aGenericType == eFamily_moz_fixed) { aGenericType = eFamily_monospace; } 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 NS_ConvertASCIItoUTF16 genericToLookup(generic); if ((!mAlwaysUseFontconfigGenerics && aLanguage) || aLanguage == nsGkAtoms::x_math) { nsIAtom* langGroup = GetLangGroup(aLanguage); nsAutoCString langGroupStr; if (langGroup) { langGroup->ToUTF8String(langGroupStr); } nsAutoCString prefFontName(kFontNamePrefix); prefFontName.Append(generic); prefFontName.Append('.'); prefFontName.Append(langGroupStr); nsAdoptingString fontlistValue = Preferences::GetString(prefFontName.get()); if (fontlistValue) { if (!fontlistValue.EqualsLiteral("serif") && !fontlistValue.EqualsLiteral("sans-serif") && !fontlistValue.EqualsLiteral("monospace")) { usePrefFontList = true; } else { // serif, sans-serif or monospace was specified genericToLookup.Assign(fontlistValue); } } } // 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.AppendElements(*prefFonts); } void gfxFcPlatformFontList::ClearLangGroupPrefFonts() { ClearGenericMappings(); gfxPlatformFontList::ClearLangGroupPrefFonts(); mAlwaysUseFontconfigGenerics = PrefFontListsUseOnlyGenerics(); } /* static */ FT_Library gfxFcPlatformFontList::GetFTLibrary() { if (!sCairoFTLibrary) { // Use cairo's FT_Library so that cairo takes care of shutdown of the // FT_Library after it has destroyed its font_faces, and FT_Done_Face // has been called on each FT_Face, at least until this bug is fixed: // https://bugs.freedesktop.org/show_bug.cgi?id=18857 // // Cairo keeps it's own FT_Library object for creating FT_Face // instances, so use that. There's no simple API for accessing this // so use the hacky method below of making a font and extracting // the library pointer from that. bool needsBold; gfxFontStyle style; gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList(); gfxFontFamily* family = pfl->GetDefaultFont(&style); NS_ASSERTION(family, "couldn't find a default font family"); gfxFontEntry* fe = family->FindFontForStyle(style, needsBold); if (!fe) { return nullptr; } RefPtr font = fe->FindOrMakeFont(&style, false); if (!font) { return nullptr; } gfxFT2FontBase* ft2Font = reinterpret_cast(font.get()); gfxFT2LockedFace face(ft2Font); if (!face.get()) { return nullptr; } sCairoFTLibrary = face.get()->glyph->library; } return sCairoFTLibrary; } gfxPlatformFontList::PrefFontList* gfxFcPlatformFontList::FindGenericFamilies(const nsAString& aGeneric, nsIAtom* aLanguage) { // set up name NS_ConvertUTF16toUTF8 generic(aGeneric); nsAutoCString fcLang; GetSampleLangForGroup(aLanguage, fcLang); ToLowerCase(fcLang); nsAutoCString genericLang(generic); 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 nsAutoRef genericPattern(FcPatternCreate()); FcPatternAddString(genericPattern, FC_FAMILY, ToFcChar8Ptr(generic.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; nsAutoRef 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) { NS_ConvertUTF8toUTF16 mappedGenericName(ToCharPtr(mappedGeneric)); AutoTArray genericFamilies; if (gfxPlatformFontList::FindAndAddFamilies(mappedGenericName, &genericFamilies)) { MOZ_ASSERT(genericFamilies.Length() == 1, "expected a single family"); if (!prefFonts->Contains(genericFamilies[0])) { prefFonts->AppendElement(genericFamilies[0]); 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() { bool prefFontsUseOnlyGenerics = true; uint32_t count; char** names; nsresult rv = Preferences::GetRootBranch()-> GetChildList(kFontNamePrefix, &count, &names); if (NS_SUCCEEDED(rv) && count) { for (size_t i = 0; i < count; i++) { // 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) nsDependentCString prefName(names[i] + ArrayLength(kFontNamePrefix) - 1); nsCCharSeparatedTokenizer tokenizer(prefName, '.'); const nsDependentCSubstring& generic = tokenizer.nextToken(); const nsDependentCSubstring& langGroup = tokenizer.nextToken(); nsAdoptingCString fontPrefValue = Preferences::GetCString(names[i]); if (!langGroup.EqualsLiteral("x-math") && !generic.Equals(fontPrefValue)) { prefFontsUseOnlyGenerics = false; break; } } NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(count, names); } return prefFontsUseOnlyGenerics; } /* static */ void gfxFcPlatformFontList::CheckFontUpdates(nsITimer *aTimer, void *aThis) { // 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(); } } #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(NS_LITERAL_STRING("fonts")))) { 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