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gfxFcPlatformFontList.cpp
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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 "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsXULAppAPI.h"
#include "SharedFontList-impl.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_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();
}
static void GetFontProperties(FcPattern* aFontPattern, WeightRange* aWeight,
StretchRange* aStretch,
SlantStyleRange* aSlantStyle) {
// weight
int weight;
if (FcPatternGetInteger(aFontPattern, FC_WEIGHT, 0, &weight) !=
FcResultMatch) {
weight = FC_WEIGHT_REGULAR;
}
*aWeight = WeightRange(MapFcWeight(weight));
// width
int width;
if (FcPatternGetInteger(aFontPattern, FC_WIDTH, 0, &width) != FcResultMatch) {
width = FC_WIDTH_NORMAL;
}
*aStretch = StretchRange(MapFcWidth(width));
// italic
int slant;
if (FcPatternGetInteger(aFontPattern, FC_SLANT, 0, &slant) != FcResultMatch) {
slant = FC_SLANT_ROMAN;
}
if (slant == FC_SLANT_OBLIQUE) {
*aSlantStyle = SlantStyleRange(FontSlantStyle::Oblique());
} else if (slant > 0) {
*aSlantStyle = SlantStyleRange(FontSlantStyle::Italic());
}
}
gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsACString& aFaceName,
FcPattern* aFontPattern,
bool aIgnoreFcCharmap)
: gfxFontEntry(aFaceName),
mFontPattern(aFontPattern),
mFTFace(nullptr),
mFTFaceInitialized(false),
mIgnoreFcCharmap(aIgnoreFcCharmap),
mHasVariationsInitialized(false),
mAspect(0.0),
mFontData(nullptr),
mLength(0) {
GetFontProperties(aFontPattern, &mWeightRange, &mStretchRange, &mStyleRange);
}
gfxFontEntry* gfxFontconfigFontEntry::Clone() const {
MOZ_ASSERT(!IsUserFont(), "we can only clone installed fonts!");
return new gfxFontconfigFontEntry(Name(), mFontPattern, mIgnoreFcCharmap);
}
static 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();
fontlist::FontList* sharedFontList = pfl->SharedFontList();
if (!IsUserFont() && mShmemFace) {
mShmemFace->SetCharacterMap(sharedFontList, charmap); // async
if (!TrySetShmemCharacterMap()) {
// Temporarily retain charmap, until the shared version is
// ready for use.
mCharacterMap = charmap;
}
} else {
mCharacterMap = pfl->FindCharMap(charmap);
}
} else {
// if error occurred, initialize to null cmap
mCharacterMap = new gfxCharacterMap();
}
LOG_FONTLIST(("(fontlist-cmap) name: %s, size: %zu hash: %8.8x%s\n",
mName.get(), charmap->SizeOfIncludingThis(moz_malloc_size_of),
charmap->mHash, mCharacterMap == charmap ? " new" : ""));
if (LOG_CMAPDATA_ENABLED()) {
char prefix[256];
SprintfLiteral(prefix, "(cmapdata) name: %.220s", mName.get());
charmap->Dump(prefix, eGfxLog_cmapdata);
}
return rv;
}
static bool HasChar(FcPattern* aFont, FcChar32 aCh) {
FcCharSet* charset = nullptr;
FcPatternGetCharSet(aFont, FC_CHARSET, 0, &charset);
return charset && FcCharSetHasChar(charset, aCh);
}
bool gfxFontconfigFontEntry::TestCharacterMap(uint32_t aCh) {
// For user fonts, or for fonts bundled with the app (which might include
// color/svg glyphs where the default glyphs may be blank, and thus confuse
// fontconfig/freetype's char map checking), we instead check the cmap
// directly for character coverage.
if (mIgnoreFcCharmap) {
// If it does not actually have a cmap, switch our strategy to use
// fontconfig's charmap after all (except for data fonts, which must
// always have a cmap to have passed OTS validation).
if (!mIsDataUserFont && !HasFontTable(TRUETYPE_TAG('c', 'm', 'a', 'p'))) {
mIgnoreFcCharmap = false;
// ...and continue with HasChar() below.
} else {
return gfxFontEntry::TestCharacterMap(aCh);
}
}
// otherwise (for system fonts), use the charmap in the pattern
return HasChar(mFontPattern, aCh);
}
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(nsFontMetrics::eHorizontal);
// The factor of 0.1 ensures that xHeight is sane so fonts don't
// become huge. Strictly ">" ensures that xHeight and emHeight are
// not both zero.
if (metrics.xHeight > 0.1 * metrics.emHeight) {
mAspect = metrics.xHeight / metrics.emHeight;
}
}
return mAspect;
}
static void PrepareFontOptions(FcPattern* aPattern,
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) {
FcPattern* fontPattern = mFontPattern;
if (!fontPattern) {
return nullptr;
}
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;
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);