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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: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Logging.h"
#include "gfxFcPlatformFontList.h"
#include "gfxFont.h"
#include "gfxFontConstants.h"
#include "gfxFontFamilyList.h"
#include "gfxFT2Utils.h"
#include "gfxPlatform.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/TimeStamp.h"
#include "nsGkAtoms.h"
#include "nsILanguageAtomService.h"
#include "nsUnicodeProperties.h"
#include "nsUnicodeRange.h"
#include "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsAppDirectoryServiceDefs.h"
#include "mozilla/gfx/HelpersCairo.h"
#include <fontconfig/fcfreetype.h>
#ifdef MOZ_WIDGET_GTK
#include <gdk/gdk.h>
#endif
using namespace mozilla;
using namespace mozilla::unicode;
#ifndef FC_POSTSCRIPT_NAME
#define FC_POSTSCRIPT_NAME "postscriptname" /* String */
#endif
#define PRINTING_FC_PROPERTY "gfx.printing"
#define LOG_FONTLIST(args) MOZ_LOG(gfxPlatform::GetLog(eGfxLog_fontlist), \
LogLevel::Debug, args)
#define LOG_FONTLIST_ENABLED() MOZ_LOG_TEST( \
gfxPlatform::GetLog(eGfxLog_fontlist), \
LogLevel::Debug)
#define LOG_CMAPDATA_ENABLED() MOZ_LOG_TEST( \
gfxPlatform::GetLog(eGfxLog_cmapdata), \
LogLevel::Debug)
static const FcChar8*
ToFcChar8Ptr(const char* aStr)
{
return reinterpret_cast<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 nsAString& aFamilyName,
nsAString& aPostscriptName, nsAString& aFullname)
{
// get the Postscript name
FcChar8* psname;
if (FcPatternGetString(aFont, FC_POSTSCRIPT_NAME, 0, &psname) == FcResultMatch) {
AppendUTF8toUTF16(ToCharPtr(psname), aPostscriptName);
}
// get the canonical fullname (i.e. en name or first name)
uint32_t en = FindCanonicalNameIndex(aFont, FC_FULLNAMELANG);
FcChar8* fullname;
if (FcPatternGetString(aFont, FC_FULLNAME, en, &fullname) == FcResultMatch) {
AppendUTF8toUTF16(ToCharPtr(fullname), aFullname);
}
// if have fullname, done
if (!aFullname.IsEmpty()) {
return;
}
// otherwise, set the fullname to family + style name [en] and use that
aFullname.Append(aFamilyName);
// figure out the en style name
en = FindCanonicalNameIndex(aFont, FC_STYLELANG);
nsAutoString style;
FcChar8* stylename = nullptr;
FcPatternGetString(aFont, FC_STYLE, en, &stylename);
if (stylename) {
AppendUTF8toUTF16(ToCharPtr(stylename), style);
}
if (!style.IsEmpty() && !style.EqualsLiteral("Regular")) {
aFullname.Append(' ');
aFullname.Append(style);
}
}
static uint16_t
MapFcWeight(int aFcWeight)
{
if (aFcWeight <= (FC_WEIGHT_THIN + FC_WEIGHT_EXTRALIGHT) / 2) {
return 100;
} else if (aFcWeight <= (FC_WEIGHT_EXTRALIGHT + FC_WEIGHT_LIGHT) / 2) {
return 200;
} else if (aFcWeight <= (FC_WEIGHT_LIGHT + FC_WEIGHT_BOOK) / 2) {
return 300;
} else if (aFcWeight <= (FC_WEIGHT_REGULAR + FC_WEIGHT_MEDIUM) / 2) {
// This includes FC_WEIGHT_BOOK
return 400;
} else if (aFcWeight <= (FC_WEIGHT_MEDIUM + FC_WEIGHT_DEMIBOLD) / 2) {
return 500;
} else if (aFcWeight <= (FC_WEIGHT_DEMIBOLD + FC_WEIGHT_BOLD) / 2) {
return 600;
} else if (aFcWeight <= (FC_WEIGHT_BOLD + FC_WEIGHT_EXTRABOLD) / 2) {
return 700;
} else if (aFcWeight <= (FC_WEIGHT_EXTRABOLD + FC_WEIGHT_BLACK) / 2) {
return 800;
} else if (aFcWeight <= FC_WEIGHT_BLACK) {
return 900;
}
// including FC_WEIGHT_EXTRABLACK
return 901;
}
static int16_t
MapFcWidth(int aFcWidth)
{
if (aFcWidth <= (FC_WIDTH_ULTRACONDENSED + FC_WIDTH_EXTRACONDENSED) / 2) {
return NS_FONT_STRETCH_ULTRA_CONDENSED;
}
if (aFcWidth <= (FC_WIDTH_EXTRACONDENSED + FC_WIDTH_CONDENSED) / 2) {
return NS_FONT_STRETCH_EXTRA_CONDENSED;
}
if (aFcWidth <= (FC_WIDTH_CONDENSED + FC_WIDTH_SEMICONDENSED) / 2) {
return NS_FONT_STRETCH_CONDENSED;
}
if (aFcWidth <= (FC_WIDTH_SEMICONDENSED + FC_WIDTH_NORMAL) / 2) {
return NS_FONT_STRETCH_SEMI_CONDENSED;
}
if (aFcWidth <= (FC_WIDTH_NORMAL + FC_WIDTH_SEMIEXPANDED) / 2) {
return NS_FONT_STRETCH_NORMAL;
}
if (aFcWidth <= (FC_WIDTH_SEMIEXPANDED + FC_WIDTH_EXPANDED) / 2) {
return NS_FONT_STRETCH_SEMI_EXPANDED;
}
if (aFcWidth <= (FC_WIDTH_EXPANDED + FC_WIDTH_EXTRAEXPANDED) / 2) {
return NS_FONT_STRETCH_EXPANDED;
}
if (aFcWidth <= (FC_WIDTH_EXTRAEXPANDED + FC_WIDTH_ULTRAEXPANDED) / 2) {
return NS_FONT_STRETCH_EXTRA_EXPANDED;
}
return NS_FONT_STRETCH_ULTRA_EXPANDED;
}
// mapping of moz lang groups ==> default lang
struct MozLangGroupData {
nsIAtom* 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 }
};
static void
GetSampleLangForGroup(nsIAtom* aLanguage, nsACString& aLangStr)
{
aLangStr.Truncate();
if (aLanguage) {
// 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;
}
}
// xxx - Is this sufficient? The code in
// gfxFontconfigUtils::GetSampleLangForGroup has logic for sniffing the
// LANGUAGE environment to try and map langGroup ==> closest user language
// but I'm guessing that's not really all that useful. For now, just use
// the default lang mapping.
// -- get the BCP47 string representation of the lang group
if (mozLangGroup) {
if (mozLangGroup->defaultLang) {
aLangStr.Assign(mozLangGroup->defaultLang);
}
} else {
// Not a special mozilla language group.
// Use aLangGroup as a language code.
aLanguage->ToUTF8String(aLangStr);
}
}
}
gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsAString& aFaceName,
FcPattern* aFontPattern)
: gfxFontEntry(aFaceName), mFontPattern(aFontPattern),
mFTFace(nullptr), mFTFaceInitialized(false),
mAspect(0.0), mFontData(nullptr)
{
// italic
int slant;
if (FcPatternGetInteger(aFontPattern, FC_SLANT, 0, &slant) != FcResultMatch) {
slant = FC_SLANT_ROMAN;
}
if (slant == FC_SLANT_OBLIQUE) {
mStyle = NS_FONT_STYLE_OBLIQUE;
} else if (slant > 0) {
mStyle = NS_FONT_STYLE_ITALIC;
}
// weight
int weight;
if (FcPatternGetInteger(aFontPattern, FC_WEIGHT, 0, &weight) != FcResultMatch) {
weight = FC_WEIGHT_REGULAR;
}
mWeight = MapFcWeight(weight);
// width
int width;
if (FcPatternGetInteger(aFontPattern, FC_WIDTH, 0, &width) != FcResultMatch) {
width = FC_WIDTH_NORMAL;
}
mStretch = MapFcWidth(width);
}
gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsAString& aFaceName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle,
const uint8_t *aData,
FT_Face aFace)
: gfxFontEntry(aFaceName),
mFTFace(aFace), mFTFaceInitialized(true),
mAspect(0.0), mFontData(aData)
{
mWeight = aWeight;
mStyle = aStyle;
mStretch = aStretch;
mIsDataUserFont = true;
// Use fontconfig to fill out the pattern from the FTFace.
// The "file" argument cannot be nullptr (in fontconfig-2.6.0 at
// least). The dummy file passed here is removed below.
//
// When fontconfig scans the system fonts, FcConfigGetBlanks(nullptr)
// is passed as the "blanks" argument, which provides that unexpectedly
// blank glyphs are elided. Here, however, we pass nullptr for
// "blanks", effectively assuming that, if the font has a blank glyph,
// then the author intends any associated character to be rendered
// blank.
mFontPattern = FcFreeTypeQueryFace(mFTFace, ToFcChar8Ptr(""), 0, nullptr);
// given that we have a FT_Face, not really sure this is possible...
if (!mFontPattern) {
mFontPattern = FcPatternCreate();
}
FcPatternDel(mFontPattern, FC_FILE);
FcPatternDel(mFontPattern, FC_INDEX);
// Make a new pattern and store the face in it so that cairo uses
// that when creating a cairo font face.
FcPatternAddFTFace(mFontPattern, FC_FT_FACE, mFTFace);
mUserFontData = new FTUserFontData(mFTFace, mFontData);
}
gfxFontconfigFontEntry::gfxFontconfigFontEntry(const nsAString& aFaceName,
FcPattern* aFontPattern,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle)
: gfxFontEntry(aFaceName), mFontPattern(aFontPattern),
mFTFace(nullptr), mFTFaceInitialized(false),
mAspect(0.0), mFontData(nullptr)
{
mWeight = aWeight;
mStyle = aStyle;
mStretch = aStretch;
mIsLocalUserFont = true;
}
gfxFontconfigFontEntry::~gfxFontconfigFontEntry()
{
}
bool
gfxFontconfigFontEntry::SupportsLangGroup(nsIAtom *aLangGroup) const
{
if (!aLangGroup || aLangGroup == nsGkAtoms::Unicode) {
return true;
}
nsAutoCString fcLang;
GetSampleLangForGroup(aLangGroup, fcLang);
if (fcLang.IsEmpty()) {
return true;
}
// is lang included in the underlying pattern?
FcLangSet *langset;
if (FcPatternGetLangSet(mFontPattern, FC_LANG, 0, &langset) != FcResultMatch) {
return false;
}
if (FcLangSetHasLang(langset, (FcChar8 *)fcLang.get()) != FcLangDifferentLang) {
return true;
}
return false;
}
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;
bool symbolFont = false; // currently ignored
if (aFontInfoData && (charmap = GetCMAPFromFontInfo(aFontInfoData,
mUVSOffset,
symbolFont))) {
rv = NS_OK;
} else {
uint32_t kCMAP = TRUETYPE_TAG('c','m','a','p');
charmap = new gfxCharacterMap();
AutoTable cmapTable(this, kCMAP);
if (cmapTable) {
bool unicodeFont = false; // currently ignored
uint32_t cmapLen;
const uint8_t* cmapData =
reinterpret_cast<const uint8_t*>(hb_blob_get_data(cmapTable,
&cmapLen));
rv = gfxFontUtils::ReadCMAP(cmapData, cmapLen,
*charmap, mUVSOffset,
unicodeFont, symbolFont);
} else {
rv = NS_ERROR_NOT_AVAILABLE;
}
}
mHasCmapTable = NS_SUCCEEDED(rv);
if (mHasCmapTable) {
gfxPlatformFontList *pfl = gfxPlatformFontList::PlatformFontList();
mCharacterMap = pfl->FindCharMap(charmap);
} else {
// if error occurred, initialize to null cmap
mCharacterMap = new gfxCharacterMap();
}
LOG_FONTLIST(("(fontlist-cmap) name: %s, size: %d hash: %8.8x%s\n",
NS_ConvertUTF16toUTF8(mName).get(),
charmap->SizeOfIncludingThis(moz_malloc_size_of),
charmap->mHash, mCharacterMap == charmap ? " new" : ""));
if (LOG_CMAPDATA_ENABLED()) {
char prefix[256];
sprintf(prefix, "(cmapdata) name: %.220s",
NS_ConvertUTF16toUTF8(mName).get());
charmap->Dump(prefix, eGfxLog_cmapdata);
}
return rv;
}
static bool
HasChar(FcPattern *aFont, FcChar32 aCh)
{
FcCharSet *charset = nullptr;
FcPatternGetCharSet(aFont, FC_CHARSET, 0, &charset);
return charset && FcCharSetHasChar(charset, aCh);
}
bool
gfxFontconfigFontEntry::TestCharacterMap(uint32_t aCh)
{
// for system fonts, use the charmap in the pattern
if (!mIsDataUserFont) {
return HasChar(mFontPattern, aCh);
}
return gfxFontEntry::TestCharacterMap(aCh);
}
hb_blob_t*
gfxFontconfigFontEntry::GetFontTable(uint32_t aTableTag)
{
// for data fonts, read directly from the font data
if (mFontData) {
return GetTableFromFontData(mFontData, aTableTag);
}
return gfxFontEntry::GetFontTable(aTableTag);
}
void
gfxFontconfigFontEntry::MaybeReleaseFTFace()
{
// don't release if either HB or Gr face still exists
if (mHBFace || mGrFace) {
return;
}
// only close out FT_Face for system fonts, not for data fonts
if (!mIsDataUserFont) {
if (mFTFace) {
FT_Done_Face(mFTFace);
mFTFace = nullptr;
}
mFTFaceInitialized = false;
}
}
void
gfxFontconfigFontEntry::ForgetHBFace()
{
gfxFontEntry::ForgetHBFace();
MaybeReleaseFTFace();
}
void
gfxFontconfigFontEntry::ReleaseGrFace(gr_face* aFace)
{
gfxFontEntry::ReleaseGrFace(aFace);
MaybeReleaseFTFace();
}
double
gfxFontconfigFontEntry::GetAspect()
{
if (mAspect == 0.0) {
// default to aspect = 0.5
mAspect = 0.5;
// create a font to calculate x-height / em-height
gfxFontStyle s;
s.size = 100.0; // pick large size to avoid possible hinting artifacts
RefPtr<gfxFont> font = FindOrMakeFont(&s, false);
if (font) {
const gfxFont::Metrics& metrics =
font->GetMetrics(gfxFont::eHorizontal);
// The factor of 0.1 ensures that xHeight is sane so fonts don't
// become huge. Strictly ">" ensures that xHeight and emHeight are
// not both zero.
if (metrics.xHeight > 0.1 * metrics.emHeight) {
mAspect = metrics.xHeight / metrics.emHeight;
}
}
}
return mAspect;
}
static void
PrepareFontOptions(FcPattern* aPattern,
cairo_font_options_t* aFontOptions)
{
NS_ASSERTION(aFontOptions, "null font options passed to PrepareFontOptions");
// xxx - taken from the gfxFontconfigFonts code, needs to be reviewed
FcBool printing;
if (FcPatternGetBool(aPattern, PRINTING_FC_PROPERTY, 0, &printing) !=
FcResultMatch) {
printing = FcFalse;
}
// Font options are set explicitly here to improve cairo's caching
// behavior and to record the relevant parts of the pattern for
// SetupCairoFont (so that the pattern can be released).
//
// Most font_options have already been set as defaults on the FcPattern
// with cairo_ft_font_options_substitute(), then user and system
// fontconfig configurations were applied. The resulting font_options
// have been recorded on the face during
// cairo_ft_font_face_create_for_pattern().
//
// None of the settings here cause this scaled_font to behave any
// differently from how it would behave if it were created from the same
// face with default font_options.
//
// We set options explicitly so that the same scaled_font will be found in
// the cairo_scaled_font_map when cairo loads glyphs from a context with
// the same font_face, font_matrix, ctm, and surface font_options.
//
// Unfortunately, _cairo_scaled_font_keys_equal doesn't know about the
// font_options on the cairo_ft_font_face, and doesn't consider default
// option values to not match any explicit values.
//
// Even after cairo_set_scaled_font is used to set font_options for the
// cairo context, when cairo looks for a scaled_font for the context, it
// will look for a font with some option values from the target surface if
// any values are left default on the context font_options. If this
// scaled_font is created with default font_options, cairo will not find
// it.
//
// The one option not recorded in the pattern is hint_metrics, which will
// affect glyph metrics. The default behaves as CAIRO_HINT_METRICS_ON.
// We should be considering the font_options of the surface on which this
// font will be used, but currently we don't have different gfxFonts for
// different surface font_options, so we'll create a font suitable for the
// Screen. Image and xlib surfaces default to CAIRO_HINT_METRICS_ON.
if (printing) {
cairo_font_options_set_hint_metrics(aFontOptions, CAIRO_HINT_METRICS_OFF);
} else {
cairo_font_options_set_hint_metrics(aFontOptions, CAIRO_HINT_METRICS_ON);
}
// The remaining options have been recorded on the pattern and the face.
// _cairo_ft_options_merge has some logic to decide which options from the
// scaled_font or from the cairo_ft_font_face take priority in the way the
// font behaves.
//
// In the majority of cases, _cairo_ft_options_merge uses the options from
// the cairo_ft_font_face, so sometimes it is not so important which
// values are set here so long as they are not defaults, but we'll set
// them to the exact values that we expect from the font, to be consistent
// and to protect against changes in cairo.
//
// In some cases, _cairo_ft_options_merge uses some options from the
// scaled_font's font_options rather than options on the
// cairo_ft_font_face (from fontconfig).
// https://bugs.freedesktop.org/show_bug.cgi?id=11838
//
// Surface font options were set on the pattern in
// cairo_ft_font_options_substitute. If fontconfig has changed the
// hint_style then that is what the user (or distribution) wants, so we
// use the setting from the FcPattern.
//
// Fallback values here mirror treatment of defaults in cairo-ft-font.c.
FcBool hinting = FcFalse;
if (FcPatternGetBool(aPattern, FC_HINTING, 0, &hinting) != FcResultMatch) {
hinting = FcTrue;
}
cairo_hint_style_t hint_style;
if (printing || !hinting) {
hint_style = CAIRO_HINT_STYLE_NONE;
} else {
int fc_hintstyle;
if (FcPatternGetInteger(aPattern, FC_HINT_STYLE,
0, &fc_hintstyle) != FcResultMatch) {
fc_hintstyle = FC_HINT_FULL;
}
switch (fc_hintstyle) {
case FC_HINT_NONE:
hint_style = CAIRO_HINT_STYLE_NONE;
break;
case FC_HINT_SLIGHT:
hint_style = CAIRO_HINT_STYLE_SLIGHT;
break;
case FC_HINT_MEDIUM:
default: // This fallback mirrors _get_pattern_ft_options in cairo.
hint_style = CAIRO_HINT_STYLE_MEDIUM;
break;
case FC_HINT_FULL:
hint_style = CAIRO_HINT_STYLE_FULL;
break;
}
}
cairo_font_options_set_hint_style(aFontOptions, hint_style);
int rgba;
if (FcPatternGetInteger(aPattern,
FC_RGBA, 0, &rgba) != FcResultMatch) {
rgba = FC_RGBA_UNKNOWN;
}
cairo_subpixel_order_t subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT;
switch (rgba) {
case FC_RGBA_UNKNOWN:
case FC_RGBA_NONE:
default:
// There is no CAIRO_SUBPIXEL_ORDER_NONE. Subpixel antialiasing
// is disabled through cairo_antialias_t.
rgba = FC_RGBA_NONE;
// subpixel_order won't be used by the font as we won't use
// CAIRO_ANTIALIAS_SUBPIXEL, but don't leave it at default for
// caching reasons described above. Fall through:
case FC_RGBA_RGB:
subpixel_order = CAIRO_SUBPIXEL_ORDER_RGB;
break;
case FC_RGBA_BGR:
subpixel_order = CAIRO_SUBPIXEL_ORDER_BGR;
break;
case FC_RGBA_VRGB:
subpixel_order = CAIRO_SUBPIXEL_ORDER_VRGB;
break;
case FC_RGBA_VBGR:
subpixel_order = CAIRO_SUBPIXEL_ORDER_VBGR;
break;
}
cairo_font_options_set_subpixel_order(aFontOptions, subpixel_order);
FcBool fc_antialias;
if (FcPatternGetBool(aPattern,
FC_ANTIALIAS, 0, &fc_antialias) != FcResultMatch) {
fc_antialias = FcTrue;
}
cairo_antialias_t antialias;
if (!fc_antialias) {
antialias = CAIRO_ANTIALIAS_NONE;
} else if (rgba == FC_RGBA_NONE) {
antialias = CAIRO_ANTIALIAS_GRAY;
} else {
antialias = CAIRO_ANTIALIAS_SUBPIXEL;
}
cairo_font_options_set_antialias(aFontOptions, antialias);
}
cairo_scaled_font_t*
gfxFontconfigFontEntry::CreateScaledFont(FcPattern* aRenderPattern,
const gfxFontStyle *aStyle,
bool aNeedsBold)
{
if (aNeedsBold) {
FcPatternAddBool(aRenderPattern, FC_EMBOLDEN, FcTrue);
}
// synthetic oblique by skewing via the font matrix
bool needsOblique = IsUpright() &&
aStyle->style != NS_FONT_STYLE_NORMAL &&
aStyle->allowSyntheticStyle;
if (needsOblique) {
// disable embedded bitmaps (mimics behavior in 90-synthetic.conf)
FcPatternDel(aRenderPattern, FC_EMBEDDED_BITMAP);
FcPatternAddBool(aRenderPattern, FC_EMBEDDED_BITMAP, FcFalse);
}
cairo_font_face_t *face =
cairo_ft_font_face_create_for_pattern(aRenderPattern);
if (mFontData) {
// for data fonts, add the face/data pointer to the cairo font face
// so that it gets deleted whenever cairo decides
NS_ASSERTION(mFTFace, "FT_Face is null when setting user data");
NS_ASSERTION(mUserFontData, "user font data is null when setting user data");
cairo_font_face_set_user_data(face,
&sFcFontlistUserFontDataKey,
new FTUserFontDataRef(mUserFontData),
FTUserFontDataRef::Destroy);
}
cairo_scaled_font_t *scaledFont = nullptr;
cairo_matrix_t sizeMatrix;
cairo_matrix_t identityMatrix;
double adjustedSize = aStyle->size;
if (aStyle->sizeAdjust >= 0.0) {
adjustedSize = aStyle->GetAdjustedSize(GetAspect());
}
cairo_matrix_init_scale(&sizeMatrix, adjustedSize, adjustedSize);
cairo_matrix_init_identity(&identityMatrix);
if (needsOblique) {
const double kSkewFactor = OBLIQUE_SKEW_FACTOR;
cairo_matrix_t style;
cairo_matrix_init(&style,
1, //xx
0, //yx
-1 * kSkewFactor, //xy
1, //yy
0, //x0
0); //y0
cairo_matrix_multiply(&sizeMatrix, &sizeMatrix, &style);
}
cairo_font_options_t *fontOptions = cairo_font_options_create();
PrepareFontOptions(aRenderPattern, fontOptions);
scaledFont = cairo_scaled_font_create(face, &sizeMatrix,
&identityMatrix, fontOptions);
cairo_font_options_destroy(fontOptions);
NS_ASSERTION(cairo_scaled_font_status(scaledFont) == CAIRO_STATUS_SUCCESS,
"Failed to make scaled font");
cairo_font_face_destroy(face);
return scaledFont;
}
#ifdef MOZ_WIDGET_GTK
// defintion included below
static void ApplyGdkScreenFontOptions(FcPattern *aPattern);
#endif
static void
PreparePattern(FcPattern* aPattern, bool aIsPrinterFont)
{
FcConfigSubstitute(nullptr, aPattern, FcMatchPattern);
// This gets cairo_font_options_t for the Screen. We should have
// different font options for printing (no hinting) but we are not told
// what we are measuring for.
//
// If cairo adds support for lcd_filter, gdk will not provide the default
// setting for that option. We could get the default setting by creating
// an xlib surface once, recording its font_options, and then merging the
// gdk options.
//
// Using an xlib surface would also be an option to get Screen font
// options for non-GTK X11 toolkits, but less efficient than using GDK to
// pick up dynamic changes.
if(aIsPrinterFont) {
cairo_font_options_t *options = cairo_font_options_create();
cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_antialias (options, CAIRO_ANTIALIAS_GRAY);
cairo_ft_font_options_substitute(options, aPattern);
cairo_font_options_destroy(options);
FcPatternAddBool(aPattern, PRINTING_FC_PROPERTY, FcTrue);
} else {
#ifdef MOZ_WIDGET_GTK
ApplyGdkScreenFontOptions(aPattern);
#endif
}
FcDefaultSubstitute(aPattern);
}
gfxFont*
gfxFontconfigFontEntry::CreateFontInstance(const gfxFontStyle *aFontStyle,
bool aNeedsBold)
{
nsAutoRef<FcPattern> pattern(FcPatternCreate());
FcPatternAddDouble(pattern, FC_PIXEL_SIZE, aFontStyle->size);
PreparePattern(pattern, aFontStyle->printerFont);
nsAutoRef<FcPattern> renderPattern
(FcFontRenderPrepare(nullptr, pattern, mFontPattern));
cairo_scaled_font_t* scaledFont =
CreateScaledFont(renderPattern, aFontStyle, aNeedsBold);
gfxFont* newFont =
new gfxFontconfigFont(scaledFont, this, aFontStyle, aNeedsBold);
cairo_scaled_font_destroy(scaledFont);
return newFont;
}
nsresult
gfxFontconfigFontEntry::CopyFontTable(uint32_t aTableTag,
FallibleTArray<uint8_t>& aBuffer)
{
NS_ASSERTION(!mIsDataUserFont,
"data fonts should be reading tables directly from memory");
if (!mFTFaceInitialized) {
mFTFaceInitialized = true;
FcChar8 *filename;
if (FcPatternGetString(mFontPattern, FC_FILE, 0, &filename) != FcResultMatch) {
return NS_ERROR_FAILURE;
}
int index;
if (FcPatternGetInteger(mFontPattern, FC_INDEX, 0, &index) != FcResultMatch) {
index = 0; // default to 0 if not found in pattern
}
if (FT_New_Face(gfxFcPlatformFontList::GetFTLibrary(),
(const char*)filename, index, &mFTFace) != 0) {
return NS_ERROR_FAILURE;
}
}
if (!mFTFace) {
return NS_ERROR_NOT_AVAILABLE;
}
FT_ULong length = 0;
if (FT_Load_Sfnt_Table(mFTFace, aTableTag, 0, nullptr, &length) != 0) {
return NS_ERROR_NOT_AVAILABLE;
}
if (!aBuffer.SetLength(length, fallible)) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (FT_Load_Sfnt_Table(mFTFace, aTableTag, 0, aBuffer.Elements(), &length) != 0) {
aBuffer.Clear();
return NS_ERROR_FAILURE;
}
return NS_OK;
}
void
gfxFontconfigFontFamily::FindStyleVariations(FontInfoData *aFontInfoData)
{
if (mHasStyles) {
return;
}
// add font entries for each of the faces
uint32_t numFonts = mFontPatterns.Length();
NS_ASSERTION(numFonts, "font family containing no faces!!");
for (uint32_t i = 0; i < numFonts; i++) {
FcPattern* face = mFontPatterns[i];
// figure out the psname/fullname and choose which to use as the facename
nsAutoString psname, fullname;
GetFaceNames(face, mName, psname, fullname);
const nsAutoString& faceName = !psname.IsEmpty() ? psname : fullname;
gfxFontconfigFontEntry *fontEntry =
new gfxFontconfigFontEntry(faceName, face);
AddFontEntry(fontEntry);
if (LOG_FONTLIST_ENABLED()) {
LOG_FONTLIST(("(fontlist) added (%s) to family (%s)"
" with style: %s weight: %d stretch: %d"
" psname: %s fullname: %s",
NS_ConvertUTF16toUTF8(fontEntry->Name()).get(),
NS_ConvertUTF16toUTF8(Name()).get(),
(fontEntry->IsItalic()) ?
"italic" : (fontEntry->IsOblique() ? "oblique" : "normal"),
fontEntry->Weight(), fontEntry->Stretch(),
NS_ConvertUTF16toUTF8(psname).get(),
NS_ConvertUTF16toUTF8(fullname).get()));
}
}
mFaceNamesInitialized = true;
mFontPatterns.Clear();
SetHasStyles(true);
}
void
gfxFontconfigFontFamily::AddFontPattern(FcPattern* aFontPattern)
{
NS_ASSERTION(!mHasStyles,
"font patterns must not be added to already enumerated families");
nsCountedRef<FcPattern> pattern(aFontPattern);
mFontPatterns.AppendElement(pattern);
}
gfxFontconfigFont::gfxFontconfigFont(cairo_scaled_font_t *aScaledFont,
gfxFontEntry *aFontEntry,
const gfxFontStyle *aFontStyle,
bool aNeedsBold) :
gfxFT2FontBase(aScaledFont, aFontEntry, aFontStyle)
{
}
gfxFontconfigFont::~gfxFontconfigFont()
{
}
#ifdef USE_SKIA
already_AddRefed<mozilla::gfx::GlyphRenderingOptions>
gfxFontconfigFont::GetGlyphRenderingOptions(const TextRunDrawParams* aRunParams)
{
cairo_scaled_font_t *scaled_font = CairoScaledFont();
cairo_font_options_t *options = cairo_font_options_create();
cairo_scaled_font_get_font_options(scaled_font, options);
cairo_hint_style_t hint_style = cairo_font_options_get_hint_style(options);
cairo_antialias_t antialias = cairo_font_options_get_antialias(options);
cairo_font_options_destroy(options);
mozilla::gfx::FontHinting hinting =
mozilla::gfx::CairoHintingToGfxHinting(hint_style);
mozilla::gfx::AntialiasMode aaMode =
mozilla::gfx::CairoAntialiasToGfxAntialias(antialias);
// We don't want to force the use of the autohinter over the font's built in hints
// The fontconfig AA mode must be passed along because it may override the hinting style.
return mozilla::gfx::Factory::CreateCairoGlyphRenderingOptions(hinting, false, aaMode);
}
#endif
gfxFcPlatformFontList::gfxFcPlatformFontList()
: mLocalNames(64)
, mGenericMappings(32)
, mFcSubstituteCache(64)
, mLastConfig(nullptr)
{
// if the rescan interval is set, start the timer
int rescanInterval = FcConfigGetRescanInterval(nullptr);
if (rescanInterval) {
mLastConfig = FcConfigGetCurrent();
mCheckFontUpdatesTimer = do_CreateInstance("@mozilla.org/timer;1");
if (mCheckFontUpdatesTimer) {
mCheckFontUpdatesTimer->
InitWithFuncCallback(CheckFontUpdates, this,
(rescanInterval + 1) * 1000,
nsITimer::TYPE_REPEATING_SLACK);
} else {
NS_WARNING("Failure to create font updates timer");
}
}
#ifdef MOZ_BUNDLED_FONTS
mBundledFontsInitialized = false;
#endif
}
gfxFcPlatformFontList::~gfxFcPlatformFontList()
{
if (mCheckFontUpdatesTimer) {
mCheckFontUpdatesTimer->Cancel();
mCheckFontUpdatesTimer = nullptr;
}
}
void
gfxFcPlatformFontList::AddFontSetFamilies(FcFontSet* aFontSet)
{
// This iterates over the fonts in a font set and adds in gfxFontFamily
// objects for each family. The patterns for individual fonts are not
// copied here. When a family is actually used, the fonts in the family
// are enumerated and the patterns copied. Note that we're explicitly
// excluding non-scalable fonts such as X11 bitmap fonts, which
// Chrome Skia/Webkit code does also.
if (!aFontSet) {
NS_WARNING("AddFontSetFamilies called with a null font set.");
return;
}
FcChar8* lastFamilyName = (FcChar8*)"";
gfxFontFamily* fontFamily = nullptr;
nsAutoString familyName;
for (int f = 0; f < aFontSet->nfont; f++) {
FcPattern* font = aFontSet->fonts[f];
// not scalable? skip...
FcBool scalable;
if (FcPatternGetBool(font, FC_SCALABLE, 0, &scalable) != FcResultMatch ||
!scalable) {
continue;
}
// get canonical name
uint32_t cIndex = FindCanonicalNameIndex(font, FC_FAMILYLANG);
FcChar8* canonical = nullptr;
FcPatternGetString(font, FC_FAMILY, cIndex, &canonical);
if (!canonical) {
continue;
}
// same as the last one? no need to add a new family, skip
if (FcStrCmp(canonical, lastFamilyName) != 0) {
lastFamilyName = canonical;
// add new family if one doesn't already exist
familyName.Truncate();
AppendUTF8toUTF16(ToCharPtr(canonical), familyName);
nsAutoString keyName(familyName);
ToLowerCase(keyName);
fontFamily = mFontFamilies.GetWeak(keyName);
if (!fontFamily) {
fontFamily = new gfxFontconfigFontFamily(familyName);
mFontFamilies.Put(keyName, fontFamily);
}
// Add pointers to other localized family names. Most fonts
// only have a single name, so the first call to GetString
// will usually not match
FcChar8* otherName;
int n = (cIndex == 0 ? 1 : 0);
while (FcPatternGetString(font, FC_FAMILY, n, &otherName) == FcResultMatch) {
NS_ConvertUTF8toUTF16 otherFamilyName(ToCharPtr(otherName));
AddOtherFamilyName(fontFamily, otherFamilyName);
n++;
if (n == int(cIndex)) {
n++; // skip over canonical name
}
}
}
NS_ASSERTION(fontFamily, "font must belong to a font family");
gfxFontconfigFontFamily* fcFamily =
static_cast<gfxFontconfigFontFamily*>(fontFamily);
fcFamily->AddFontPattern(font);
// map the psname, fullname ==> font family for local font lookups
nsAutoString psname, fullname;
GetFaceNames(font, familyName, psname, fullname);
if (!psname.IsEmpty()) {
ToLowerCase(psname);
mLocalNames.Put(psname, font);
}
if (!fullname.IsEmpty()) {
ToLowerCase(fullname);
mLocalNames.Put(fullname, font);
}
}
}
nsresult
gfxFcPlatformFontList::InitFontList()
{
mLastConfig = FcConfigGetCurrent();
// reset font lists
gfxPlatformFontList::InitFontList();
mLocalNames.Clear();
mGenericMappings.Clear();
mFcSubstituteCache.Clear();
// iterate over available fonts
FcFontSet* systemFonts = FcConfigGetFonts(nullptr, FcSetSystem);
AddFontSetFamilies(systemFonts);
#ifdef MOZ_BUNDLED_FONTS
ActivateBundledFonts();
FcFontSet* appFonts = FcConfigGetFonts(nullptr, FcSetApplication);
AddFontSetFamilies(appFonts);
#endif
mOtherFamilyNamesInitialized = true;
return NS_OK;
}
// For displaying the fontlist in UI, use explicit call to FcFontList. Using
// FcFontList results in the list containing the localized names as dictated
// by system defaults.
static void
GetSystemFontList(nsTArray<nsString>& aListOfFonts, nsIAtom *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;
GetSampleLangForGroup(aLangGroup, fcLang);
if (!fcLang.IsEmpty()) {
FcPatternAddString(pat, FC_LANG, ToFcChar8Ptr(fcLang.get()));
}
// ignore size-specific fonts
FcPatternAddBool(pat, FC_SCALABLE, FcTrue);
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(family, strFamily);
if (aListOfFonts.Contains(strFamily)) {
continue;
}
aListOfFonts.AppendElement(strFamily);
}
aListOfFonts.Sort();
}
void
gfxFcPlatformFontList::GetFontList(nsIAtom *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
NS_NOTREACHED("unexpected CSS generic font family");
// The first in the list becomes the default in
// FontBuilder.readFontSelection() if the preference-selected font is not
// available, so put system configured defaults first.
if (monospace)
aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("monospace"));
if (sansSerif)
aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("sans-serif"));
if (serif)
aListOfFonts.InsertElementAt(0, NS_LITERAL_STRING("serif"));
}
gfxFontFamily*
gfxFcPlatformFontList::GetDefaultFont(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.
return FindGenericFamily(NS_LITERAL_STRING("-moz-default"),
aStyle->language);
}
gfxFontEntry*
gfxFcPlatformFontList::LookupLocalFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle)
{
nsAutoString keyName(aFontName);
ToLowerCase(keyName);
// if name is not in the global list, done
FcPattern* fontPattern = mLocalNames.Get(keyName);
if (!fontPattern) {
return nullptr;
}
return new gfxFontconfigFontEntry(aFontName,
fontPattern,
aWeight, aStretch, aStyle);
}
gfxFontEntry*
gfxFcPlatformFontList::MakePlatformFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
uint8_t aStyle,
const uint8_t* aFontData,
uint32_t aLength)
{
FT_Face face;
FT_Error error =
FT_New_Memory_Face(gfxFcPlatformFontList::GetFTLibrary(),
aFontData, aLength, 0, &face);
if (error != FT_Err_Ok) {
NS_Free((void*)aFontData);
return nullptr;
}
if (FT_Err_Ok != FT_Select_Charmap(face, FT_ENCODING_UNICODE)) {
FT_Done_Face(face);
NS_Free((void*)aFontData);
return nullptr;
}
return new gfxFontconfigFontEntry(aFontName, aWeight, aStretch,
aStyle, aFontData, face);
}
gfxFontFamily*
gfxFcPlatformFontList::FindFamily(const nsAString& aFamily, gfxFontStyle* aStyle)
{
nsAutoString familyName(aFamily);
ToLowerCase(familyName);
nsIAtom* language = (aStyle ? aStyle->language.get() : nullptr);
// deprecated generic names are explicitly converted to standard generics
bool isDeprecatedGeneric = false;
if (familyName.EqualsLiteral("sans") ||
familyName.EqualsLiteral("sans serif")) {
familyName.AssignLiteral("sans-serif");
isDeprecatedGeneric = true;
} else if (familyName.EqualsLiteral("mono")) {
familyName.AssignLiteral("monospace");
isDeprecatedGeneric = true;
}
// fontconfig generics? use fontconfig to determine the family for lang
if (isDeprecatedGeneric ||
mozilla::FontFamilyName::Convert(familyName).IsGeneric()) {
return FindGenericFamily(familyName, language);
}
// 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 family found via this process. So check the cache first:
NS_ConvertUTF16toUTF8 familyToFind(familyName);
gfxFontFamily* cached = mFcSubstituteCache.GetWeak(familyToFind);
if (cached) {
return cached;
}
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(familyToFind.get()));
FcPatternAddString(fontWithSentinel, FC_FAMILY, kSentinelName);
FcConfigSubstitute(nullptr, fontWithSentinel, FcMatchPattern);
// iterate through substitutions until hitting the sentinel
FcChar8* substName = nullptr;
for (int i = 0;
FcPatternGetString(fontWithSentinel, FC_FAMILY,
i, &substName) == FcResultMatch;
i++)
{
NS_ConvertUTF8toUTF16 subst(ToCharPtr(substName));
if (sentinelFirstFamily &&
FcStrCmp(substName, sentinelFirstFamily) == 0) {
break;
}
gfxFontFamily* foundFamily = gfxPlatformFontList::FindFamily(subst);
if (foundFamily) {
// We've figured out what family the given name maps to, after any
// fontconfig subsitutions. Cache it to speed up future lookups.
mFcSubstituteCache.Put(familyToFind, foundFamily);
return foundFamily;
}
}
return nullptr;
}
bool
gfxFcPlatformFontList::GetStandardFamilyName(const nsAString& aFontName,
nsAString& aFamilyName)
{
// 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;
}
gfxFontFamily *family = FindFamily(aFontName);
if (family) {
family->LocalizedName(aFamilyName);
return true;
}
return false;
}
/* static */ FT_Library
gfxFcPlatformFontList::GetFTLibrary()
{
if (!sCairoFTLibrary) {
// Use cairo's FT_Library so that cairo takes care of shutdown of the
// FT_Library after it has destroyed its font_faces, and FT_Done_Face
// has been called on each FT_Face, at least until this bug is fixed:
// https://bugs.freedesktop.org/show_bug.cgi?id=18857
//
// Cairo keeps it's own FT_Library object for creating FT_Face
// instances, so use that. There's no simple API for accessing this
// so use the hacky method below of making a font and extracting
// the library pointer from that.
bool needsBold;
gfxFontStyle style;
gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
gfxFontFamily* family = pfl->GetDefaultFont(&style);
NS_ASSERTION(family, "couldn't find a default font family");
gfxFontEntry* fe = family->FindFontForStyle(style, needsBold);
if (!fe) {
return nullptr;
}
RefPtr<gfxFont> font = fe->FindOrMakeFont(&style, false);
if (!font) {
return nullptr;
}
gfxFT2FontBase* ft2Font = reinterpret_cast<gfxFT2FontBase*>(font.get());
gfxFT2LockedFace face(ft2Font);
if (!face.get()) {
return nullptr;
}
sCairoFTLibrary = face.get()->glyph->library;
}
return sCairoFTLibrary;
}
gfxFontFamily*
gfxFcPlatformFontList::FindGenericFamily(const nsAString& aGeneric,
nsIAtom* aLanguage)
{
// set up name
NS_ConvertUTF16toUTF8 generic(aGeneric);
nsAutoCString fcLang;
GetSampleLangForGroup(aLanguage, fcLang);
nsAutoCString genericLang(generic);
genericLang.Append(fcLang);
// try to get the family from the cache
gfxFontFamily *genericFamily = mGenericMappings.GetWeak(genericLang);
if (genericFamily) {
return genericFamily;
}
// if not found, ask fontconfig to pick the appropriate font
nsAutoRef<FcPattern> genericPattern(FcPatternCreate());
FcPatternAddString(genericPattern, FC_FAMILY,
ToFcChar8Ptr(generic.get()));
// -- prefer scalable fonts
FcPatternAddBool(genericPattern, FC_SCALABLE, FcTrue);
// -- add the lang to the pattern
if (!fcLang.IsEmpty()) {
FcPatternAddString(genericPattern, FC_LANG,
ToFcChar8Ptr(fcLang.get()));
}
// -- perform substitutions
FcConfigSubstitute(nullptr, genericPattern, FcMatchPattern);
FcDefaultSubstitute(genericPattern);
// -- sort to get the closest matches
FcResult result;
nsAutoRef<FcFontSet> faces(FcFontSort(nullptr, genericPattern, FcFalse,
nullptr, &result));
if (!faces) {
return nullptr;
}
// -- pick the first font for which a font family exists
for (int i = 0; i < faces->nfont; i++) {
FcPattern* font = faces->fonts[i];
FcChar8* mappedGeneric = nullptr;
// not scalable? skip...
FcBool scalable;
if (FcPatternGetBool(font, FC_SCALABLE, 0, &scalable) != FcResultMatch ||
!scalable) {
continue;
}
FcPatternGetString(font, FC_FAMILY, 0, &mappedGeneric);
if (mappedGeneric) {
NS_ConvertUTF8toUTF16 mappedGenericName(ToCharPtr(mappedGeneric));
genericFamily = gfxPlatformFontList::FindFamily(mappedGenericName);
if (genericFamily) {
//printf("generic %s ==> %s\n", genericLang.get(), (const char*)mappedGeneric);
mGenericMappings.Put(genericLang, genericFamily);
break;
}
}
}
return genericFamily;
}
/* static */ void
gfxFcPlatformFontList::CheckFontUpdates(nsITimer *aTimer, void *aThis)
{
// 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();
}
}
#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_GTK2
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