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gecko-dev/gfx/thebes/gfxFcPlatformFontList.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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/TimeStamp.h"
#include "nsGkAtoms.h"
#include "nsUnicodeProperties.h"
#include "nsUnicodeRange.h"
#include "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsXULAppAPI.h"
#include "mozilla/gfx/HelpersCairo.h"
#include <fontconfig/fcfreetype.h>
#include <dlfcn.h>
#include <unistd.h>
#ifdef MOZ_WIDGET_GTK
# include <gdk/gdk.h>
# include "gfxPlatformGtk.h"
#endif
#ifdef MOZ_X11
# include "mozilla/X11Util.h"
#endif
#if defined(MOZ_CONTENT_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;
using mozilla::dom::FontPatternListEntry;
using mozilla::dom::SystemFontListEntry;
#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)
template <>
class nsAutoRefTraits<FcFontSet> : public nsPointerRefTraits<FcFontSet> {
public:
static void Release(FcFontSet* ptr) { FcFontSetDestroy(ptr); }
};
template <>
class nsAutoRefTraits<FcObjectSet> : public nsPointerRefTraits<FcObjectSet> {
public:
static void Release(FcObjectSet* ptr) { FcObjectSetDestroy(ptr); }
};
static const FcChar8* ToFcChar8Ptr(const char* aStr) {
return reinterpret_cast<const FcChar8*>(aStr);
}
static const char* ToCharPtr(const FcChar8* aStr) {
return reinterpret_cast<const char*>(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 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();
}
gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsACString& aFaceName,
FcPattern* aFontPattern,
bool aIgnoreFcCharmap)
: gfxFontEntry(aFaceName),
mFontPattern(aFontPattern),
mFTFace(nullptr),
mFTFaceInitialized(false),
mIgnoreFcCharmap(aIgnoreFcCharmap),
mHasVariationsInitialized(false),
mAspect(0.0),
mFontData(nullptr),
mLength(0) {
// italic
int slant;
if (FcPatternGetInteger(aFontPattern, FC_SLANT, 0, &slant) != FcResultMatch) {
slant = FC_SLANT_ROMAN;
}
if (slant == FC_SLANT_OBLIQUE) {
mStyleRange = SlantStyleRange(FontSlantStyle::Oblique());
} else if (slant > 0) {
mStyleRange = SlantStyleRange(FontSlantStyle::Italic());
}
// weight
int weight;
if (FcPatternGetInteger(aFontPattern, FC_WEIGHT, 0, &weight) !=
FcResultMatch) {
weight = FC_WEIGHT_REGULAR;
}
mWeightRange = WeightRange(MapFcWeight(weight));
// width
int width;
if (FcPatternGetInteger(aFontPattern, FC_WIDTH, 0, &width) != FcResultMatch) {
width = FC_WIDTH_NORMAL;
}
mStretchRange = StretchRange(MapFcWidth(width));
}
gfxFontEntry* gfxFontconfigFontEntry::Clone() const {
MOZ_ASSERT(!IsUserFont(), "we can only clone installed fonts!");
return new gfxFontconfigFontEntry(Name(), mFontPattern, mIgnoreFcCharmap);
}
static FcPattern* 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.
FcPattern* pattern = FcFreeTypeQueryFace(aFace, ToFcChar8Ptr(""), 0, nullptr);
// given that we have a FT_Face, not really sure this is possible...
if (!pattern) {
pattern = 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;
}
static FT_Face 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::NewFTFace(nullptr, ToCharPtr(filename), index);
}
gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsACString& aFaceName,
WeightRange aWeight,
StretchRange aStretch,
SlantStyleRange aStyle,
const uint8_t* aData,
uint32_t aLength, FT_Face aFace)
: gfxFontEntry(aFaceName),
mFTFace(aFace),
mFTFaceInitialized(true),
mIgnoreFcCharmap(true),
mHasVariationsInitialized(false),
mAspect(0.0),
mFontData(aData),
mLength(aLength) {
mWeightRange = aWeight;
mStyleRange = aStyle;
mStretchRange = aStretch;
mIsDataUserFont = true;
mFontPattern = CreatePatternForFace(mFTFace);
mUserFontData = new FTUserFontData(mFTFace, mFontData);
}
gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsACString& aFaceName,
FcPattern* aFontPattern,
WeightRange aWeight,
StretchRange aStretch,
SlantStyleRange aStyle)
: gfxFontEntry(aFaceName),
mFontPattern(aFontPattern),
mFTFace(nullptr),
mFTFaceInitialized(false),
mHasVariationsInitialized(false),
mAspect(0.0),
mFontData(nullptr),
mLength(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->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<gfxCharacterMap> 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<const uint8_t*>(
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();
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);
}
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) {
if (mMMVar) {
if (sDoneVar) {
(*sDoneVar)(mFTFace->glyph->library, mMMVar);
} else {
free(mMMVar);
}
mMMVar = nullptr;
}
Factory::ReleaseFTFace(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) {
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<const OS2Table*>(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<gfxFont> font = FindOrMakeFont(&s);
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);
}
static void ReleaseFTUserFontData(void* aData) {
static_cast<FTUserFontData*>(aData)->Release();
}
static cairo_user_data_key_t sFcFontlistFTFaceKey;
static void ReleaseFTFace(void* aData) {
Factory::ReleaseFTFace(static_cast<FT_Face>(aData));
}
cairo_scaled_font_t* gfxFontconfigFontEntry::CreateScaledFont(
FcPattern* aRenderPattern, gfxFloat aAdjustedSize,
const gfxFontStyle* aStyle, FT_Face aFTFace) {
if (aStyle->NeedsSyntheticBold(this)) {
FcPatternAddBool(aRenderPattern, FC_EMBOLDEN, FcTrue);
}
// will synthetic oblique be applied using a transform?
bool needsOblique = IsUpright() &&
aStyle->style != FontSlantStyle::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);
}
AutoTArray<FT_Fixed, 8> coords;
if (HasVariations()) {
FT_Face ftFace = GetFTFace();
if (ftFace) {
AutoTArray<gfxFontVariation, 8> settings;
GetVariationsForStyle(settings, *aStyle);
gfxFT2FontBase::SetupVarCoords(GetMMVar(), settings, &coords);
}
}
cairo_font_face_t* face = cairo_ft_font_face_create_for_pattern(
aRenderPattern, coords.Elements(), coords.Length());
if (aFTFace) {
if (cairo_font_face_set_user_data(face, &sFcFontlistFTFaceKey, aFTFace,
ReleaseFTFace) != CAIRO_STATUS_SUCCESS) {
NS_WARNING("Failed binding FT_Face to Cairo font face");
cairo_font_face_destroy(face);
Factory::ReleaseFTFace(aFTFace);
return nullptr;
}
}
if (mFontData) {
// for data fonts, add the face/data pointer to the cairo font face
// so that it ges 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");
mUserFontData.get()->AddRef();
if (cairo_font_face_set_user_data(face, &sFcFontlistUserFontDataKey,
mUserFontData, ReleaseFTUserFontData) !=
CAIRO_STATUS_SUCCESS) {
NS_WARNING("Failed binding FTUserFontData to Cairo font face");
mUserFontData.get()->Release();
cairo_font_face_destroy(face);
return nullptr;
}
}
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);
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<FcChar8*>(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<UnscaledFontFontconfig> 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<UnscaledFontFontconfig>
gfxFontconfigFontEntry::UnscaledFontCache::Lookup(const char* aFile,
uint32_t aIndex) {
for (size_t i = 0; i < kNumEntries; i++) {
RefPtr<UnscaledFontFontconfig> entry(mUnscaledFonts[i]);
if (entry && !strcmp(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) {
nsAutoRef<FcPattern> 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);
FT_Face face = mFTFace;
FcPattern* fontPattern = mFontPattern;
if (face && face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS) {
// For variation fonts, we create a new FT_Face and FcPattern here
// so that variation coordinates from the style can be applied
// without affecting other font instances created from the same
// entry (font resource).
if (mFontData) {
// For user fonts: create a new FT_Face from the font data, and then
// make a pattern from that.
face = Factory::NewFTFaceFromData(nullptr, mFontData, mLength, 0);
fontPattern = CreatePatternForFace(face);
} else {
// For system fonts: create a new FT_Face and store it in a copy of
// the original mFontPattern.
fontPattern = FcPatternDuplicate(mFontPattern);
face = CreateFaceForPattern(fontPattern);
if (face) {
FcPatternAddFTFace(fontPattern, FC_FT_FACE, face);
} else {
// I don't think CreateFaceForPattern above should ever fail,
// but just in case let's fall back here.
face = mFTFace;
}
}
}
PreparePattern(pattern, aFontStyle->printerFont);
nsAutoRef<FcPattern> renderPattern(
FcFontRenderPrepare(nullptr, pattern, fontPattern));
if (fontPattern != mFontPattern) {
// Discard temporary pattern used for variation support
FcPatternDestroy(fontPattern);
}
if (!renderPattern) {
NS_WARNING("Failed to prepare Fontconfig pattern for font instance");
if (face != mFTFace) {
Factory::ReleaseFTFace(face);
}
return nullptr;
}
cairo_scaled_font_t* scaledFont = CreateScaledFont(
renderPattern, size, aFontStyle, face != mFTFace ? face : nullptr);
const FcChar8* file = ToFcChar8Ptr("");
int index = 0;
if (!mFontData) {
if (FcPatternGetString(renderPattern, FC_FILE, 0,
const_cast<FcChar8**>(&file)) != FcResultMatch ||
FcPatternGetInteger(renderPattern, FC_INDEX, 0, &index) !=
FcResultMatch) {
NS_WARNING("No file in Fontconfig pattern for font instance");
return nullptr;
}
}
RefPtr<UnscaledFontFontconfig> unscaledFont =
mUnscaledFontCache.Lookup(ToCharPtr(file), index);
if (!unscaledFont) {
unscaledFont = mFontData
? new UnscaledFontFontconfig(mFTFace)
: new UnscaledFontFontconfig(ToCharPtr(file), index);
mUnscaledFontCache.Add(unscaledFont);
}
gfxFont* newFont = new gfxFontconfigFont(
unscaledFont, scaledFont, renderPattern, size, this, aFontStyle);
cairo_scaled_font_destroy(scaledFont);
return newFont;
}
FT_Face gfxFontconfigFontEntry::GetFTFace() {
if (!mFTFaceInitialized) {
mFTFaceInitialized = true;
mFTFace = CreateFaceForPattern(mFontPattern);
}
return mFTFace;
}
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 {
FT_Face face = GetFTFace();
if (face) {
mHasVariations = face->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;
}
FT_Face face = GetFTFace();
if (!face) {
return nullptr;
}
if (FT_Err_Ok != (*sGetVar)(face, &mMMVar)) {
mMMVar = nullptr;
}
return mMMVar;
}
void gfxFontconfigFontEntry::GetVariationAxes(
nsTArray<gfxFontVariationAxis>& aAxes) {
if (!HasVariations()) {
return;
}
gfxFT2Utils::GetVariationAxes(GetMMVar(), aAxes);
}
void gfxFontconfigFontEntry::GetVariationInstances(
nsTArray<gfxFontVariationInstance>& aInstances) {
if (!HasVariations()) {
return;
}
gfxFT2Utils::GetVariationInstances(this, GetMMVar(), aInstances);
}
nsresult gfxFontconfigFontEntry::CopyFontTable(uint32_t aTableTag,
nsTArray<uint8_t>& aBuffer) {
NS_ASSERTION(!mIsDataUserFont,
"data fonts should be reading tables directly from memory");
FT_Face face = GetFTFace();
if (!face) {
return NS_ERROR_NOT_AVAILABLE;
}
FT_ULong length = 0;
if (FT_Load_Sfnt_Table(face, 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(face, 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
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);
}
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<FcPattern> 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<gfxFontEntry*>& 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<gfxFontconfigFontEntry*>(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<gfxFontconfigFontEntry*>(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 <typename Func>
void gfxFontconfigFontFamily::AddFacesToFontList(Func aAddPatternFunc) {
if (HasStyles()) {
for (auto& fe : mAvailableFonts) {
if (!fe) {
continue;
}
auto fce = static_cast<gfxFontconfigFontEntry*>(fe.get());
aAddPatternFunc(fce->GetPattern(), mContainsAppFonts);
}
} else {
for (auto& pat : mFontPatterns) {
aAddPatternFunc(pat, mContainsAppFonts);
}
}
}
gfxFontconfigFont::gfxFontconfigFont(
const RefPtr<UnscaledFontFontconfig>& aUnscaledFont,
cairo_scaled_font_t* aScaledFont, FcPattern* aPattern,
gfxFloat aAdjustedSize, gfxFontEntry* aFontEntry,
const gfxFontStyle* aFontStyle)
: gfxFT2FontBase(aUnscaledFont, aScaledFont, aFontEntry, aFontStyle),
mPattern(aPattern) {
mAdjustedSize = aAdjustedSize;
}
gfxFontconfigFont::~gfxFontconfigFont() {}
already_AddRefed<ScaledFont> gfxFontconfigFont::GetScaledFont(
mozilla::gfx::DrawTarget* aTarget) {
if (!mAzureScaledFont) {
NativeFont nativeFont;
nativeFont.mType = NativeFontType::FONTCONFIG_PATTERN;
nativeFont.mFont = GetPattern();
mAzureScaledFont = Factory::CreateScaledFontForNativeFont(
nativeFont, GetUnscaledFont(), GetAdjustedSize(), GetCairoScaledFont());
InitializeScaledFont();
}
RefPtr<ScaledFont> scaledFont(mAzureScaledFont);
return scaledFont.forget();
}
gfxFcPlatformFontList::gfxFcPlatformFontList()
: mLocalNames(64),
mGenericMappings(32),
mFcSubstituteCache(64),
mLastConfig(nullptr),
mAlwaysUseFontconfigGenerics(true) {
if (XRE_IsParentProcess()) {
// if the rescan interval is set, start the timer
int rescanInterval = FcConfigGetRescanInterval(nullptr);
if (rescanInterval) {
mLastConfig = FcConfigGetCurrent();
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<gfxFontconfigFontFamily> 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<const char*>(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<const char*>(path)) &
SandboxBroker::Perms::MAY_READ)) {
continue;
}
#endif
AddPatternToFontList(pattern, lastFamilyName, familyName, fontFamily,
aAppFonts);
}
}
void gfxFcPlatformFontList::AddPatternToFontList(
FcPattern* aFont, FcChar8*& aLastFamilyName, nsACString& aFamilyName,
RefPtr<gfxFontconfigFontFamily>& 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<gfxFontconfigFontFamily*>(mFontFamilies.GetWeak(keyName));
if (!aFontFamily) {
aFontFamily = new gfxFontconfigFontFamily(aFamilyName);
mFontFamilies.Put(keyName, 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
ActivateBundledFonts();
#endif
mLocalNames.Clear();
mFcSubstituteCache.Clear();
mAlwaysUseFontconfigGenerics = PrefFontListsUseOnlyGenerics();
mOtherFamilyNamesInitialized = true;
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<gfxFontconfigFontFamily> 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 (SystemFontListEntry& fle : fontList) {
MOZ_ASSERT(fle.type() ==
SystemFontListEntry::Type::TFontPatternListEntry);
FontPatternListEntry& fpe(fle);
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;
}
mLastConfig = FcConfigGetCurrent();
UniquePtr<SandboxPolicy> 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
// iterate over available fonts
FcFontSet* systemFonts = FcConfigGetFonts(nullptr, FcSetSystem);
AddFontSetFamilies(systemFonts, policy.get(), /* aAppFonts = */ false);
#ifdef MOZ_BUNDLED_FONTS
FcFontSet* appFonts = FcConfigGetFonts(nullptr, FcSetApplication);
AddFontSetFamilies(appFonts, policy.get(), /* aAppFonts = */ true);
#endif
return NS_OK;
}
void gfxFcPlatformFontList::ReadSystemFontList(
InfallibleTArray<SystemFontListEntry>* 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<gfxFontconfigFontFamily*>(iter.Data().get());
family->AddFacesToFontList([&](FcPattern* aPat, bool aAppFonts) {
char* s = (char*)FcNameUnparse(aPat);
nsAutoCString patternStr(s);
free(s);
if (FcResultMatch ==
FcPatternGetString(aPat, FC_FILE, 0, (FcChar8**)&s)) {
patternStr.Append(":file=");
patternStr.Append(s);
}
retValue->AppendElement(FontPatternListEntry(patternStr, aAppFonts));
});
}
} else {
for (auto iter = mFontFamilies.Iter(); !iter.Done(); iter.Next()) {
auto family = static_cast<gfxFontconfigFontFamily*>(iter.Data().get());
family->AddFacesToFontList([&](FcPattern* aPat, bool aAppFonts) {
char* s = (char*)FcNameUnparse(aPat);
nsDependentCString patternStr(s);
retValue->AppendElement(FontPatternListEntry(patternStr, aAppFonts));
free(s);
});
}
}
}
// 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<nsString>& aListOfFonts,
nsAtom* aLangGroup) {
aListOfFonts.Clear();
nsAutoRef<FcPattern> pat(FcPatternCreate());
if (!pat) {
return;
}
nsAutoRef<FcObjectSet> 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()));
}
nsAutoRef<FcFontSet> 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(MakeStringSpan(family), strFamily);
if (aListOfFonts.Contains(strFamily)) {
continue;
}
aListOfFonts.AppendElement(strFamily);
}
aListOfFonts.Sort();
}
void gfxFcPlatformFontList::GetFontList(nsAtom* aLangGroup,
const nsACString& aGenericFamily,
nsTArray<nsString>& 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, 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_CSTRING("-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 nsACString& aFontName, WeightRange aWeightForEntry,
StretchRange aStretchForEntry, SlantStyleRange aStyleForEntry) {
nsAutoCString 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, aWeightForEntry,
aStretchForEntry, aStyleForEntry);
}
gfxFontEntry* gfxFcPlatformFontList::MakePlatformFont(
const nsACString& aFontName, WeightRange aWeightForEntry,
StretchRange aStretchForEntry, SlantStyleRange aStyleForEntry,
const uint8_t* aFontData, uint32_t aLength) {
FT_Face face = Factory::NewFTFaceFromData(nullptr, aFontData, aLength, 0);
if (!face) {
free((void*)aFontData);
return nullptr;
}
if (FT_Err_Ok != FT_Select_Charmap(face, FT_ENCODING_UNICODE)) {
Factory::ReleaseFTFace(face);
free((void*)aFontData);
return nullptr;
}
return new gfxFontconfigFontEntry(aFontName, aWeightForEntry,
aStretchForEntry, aStyleForEntry, aFontData,
aLength, face);
}
bool gfxFcPlatformFontList::FindAndAddFamilies(
const nsACString& aFamily, nsTArray<FamilyAndGeneric>* aOutput,
FindFamiliesFlags aFlags, gfxFontStyle* aStyle, gfxFloat aDevToCssSize) {
nsAutoCString familyName(aFamily);
ToLowerCase(familyName);
nsAtom* 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:
AutoTArray<FamilyAndGeneric, 10> cachedFamilies;
if (mFcSubstituteCache.Get(familyName, &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<FcPattern> sentinelSubst(FcPatternCreate());
FcPatternAddString(sentinelSubst, FC_FAMILY, kSentinelName);
FcConfigSubstitute(nullptr, sentinelSubst, FcMatchPattern);
FcPatternGetString(sentinelSubst, FC_FAMILY, 0, &sentinelFirstFamily);
// substitutions for font, -moz-sentinel pattern
nsAutoRef<FcPattern> fontWithSentinel(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.
FcChar8* substName = nullptr;
for (int i = 0; FcPatternGetString(fontWithSentinel, FC_FAMILY, i,
&substName) == FcResultMatch;
i++) {
if (sentinelFirstFamily && FcStrCmp(substName, sentinelFirstFamily) == 0) {
break;
}
gfxPlatformFontList::FindAndAddFamilies(
nsDependentCString(ToCharPtr(substName)), &cachedFamilies, aFlags);
}
// 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;
}
nsAutoRef<FcPattern> pat(FcPatternCreate());
if (!pat) {
return true;
}
nsAutoRef<FcObjectSet> os(FcObjectSetBuild(FC_FAMILY, nullptr));
if (!os) {
return true;
}
// add the family name to the pattern
FcPatternAddString(pat, FC_FAMILY, ToFcChar8Ptr(aFontName.get()));
nsAutoRef<FcFontSet> 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<nsCString> 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());
nsAutoRef<FcFontSet> 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) {
aFamilyName = candidates[j];
return true;
}
}
// didn't find localized name, leave family name blank
return true;
}
void gfxFcPlatformFontList::AddGenericFonts(
mozilla::FontFamilyType aGenericType, nsAtom* aLanguage,
nsTArray<FamilyAndGeneric>& 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
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.get(), aGenericType));
}
}
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.
FcPattern* pat =
FcPatternBuild(0, FC_FAMILY, FcTypeString, "serif", (char*)0);
cairo_font_face_t* face =
cairo_ft_font_face_create_for_pattern(pat, nullptr, 0);
FcPatternDestroy(pat);
cairo_matrix_t identity;
cairo_matrix_init_identity(&identity);
cairo_font_options_t* options = cairo_font_options_create();
cairo_scaled_font_t* sf =
cairo_scaled_font_create(face, &identity, &identity, options);
cairo_font_options_destroy(options);
cairo_font_face_destroy(face);
FT_Face ft = cairo_ft_scaled_font_lock_face(sf);
sCairoFTLibrary = ft->glyph->library;
cairo_ft_scaled_font_unlock_face(sf);
cairo_scaled_font_destroy(sf);
}
return sCairoFTLibrary;
}
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
nsAutoRef<FcPattern> genericPattern(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;
nsAutoRef<FcFontSet> 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<FamilyAndGeneric, 1> genericFamilies;
if (gfxPlatformFontList::FindAndAddFamilies(
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;
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)
// 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)
nsDependentCString prefName(names[i] + ArrayLength(kFontNamePrefix) - 1);
nsCCharSeparatedTokenizer tokenizer(prefName, '.');
const nsDependentCSubstring& generic = tokenizer.nextToken();
const nsDependentCSubstring& langGroup = tokenizer.nextToken();
nsAutoCString fontPrefValue;
Preferences::GetCString(names[i], 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;
}
}
NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(count, names);
}
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<gfxFcPlatformFontList*>(aThis);
FcConfig* current = FcConfigGetCurrent();
if (current != pfl->GetLastConfig()) {
pfl->UpdateFontList();
pfl->ForceGlobalReflow();
mozilla::dom::ContentParent::NotifyUpdatedFonts();
}
}
gfxFontFamily* gfxFcPlatformFontList::CreateFontFamily(
const nsACString& aName) const {
return new gfxFontconfigFontFamily(aName);
}
// 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<nsAtom> lang = NS_Atomize(lowered);
RefPtr<nsAtom> 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<nsIFile> 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
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