mirror of
https://github.com/mozilla/gecko-dev.git
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2187 lines
76 KiB
C++
2187 lines
76 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Util.h"
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#include "prtypes.h"
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#include "prlink.h"
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#include "gfxTypes.h"
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#include "nsTArray.h"
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#include "gfxContext.h"
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#ifdef MOZ_WIDGET_GTK
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#include "gfxPlatformGtk.h"
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#endif
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#ifdef MOZ_WIDGET_QT
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#include "gfxQtPlatform.h"
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#endif
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#include "gfxPangoFonts.h"
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#include "gfxFT2FontBase.h"
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#include "gfxFT2Utils.h"
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#include "harfbuzz/hb.h"
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#include "harfbuzz/hb-ot.h"
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#include "gfxHarfBuzzShaper.h"
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#include "gfxGraphiteShaper.h"
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#include "nsUnicodeProperties.h"
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#include "nsUnicodeScriptCodes.h"
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#include "gfxFontconfigUtils.h"
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#include "gfxUserFontSet.h"
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#include <cairo.h>
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#include <cairo-ft.h>
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#include <fontconfig/fcfreetype.h>
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#include <pango/pango.h>
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#include FT_TRUETYPE_TABLES_H
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#ifdef MOZ_WIDGET_GTK
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#include <gdk/gdk.h>
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#endif
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#include <math.h>
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using namespace mozilla;
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using namespace mozilla::unicode;
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#define PRINTING_FC_PROPERTY "gfx.printing"
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static PangoLanguage *GuessPangoLanguage(nsIAtom *aLanguage);
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static cairo_scaled_font_t *
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CreateScaledFont(FcPattern *aPattern, cairo_font_face_t *aFace);
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static FT_Library gFTLibrary;
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// FC_FAMILYLANG and FC_FULLNAME were introduced in fontconfig-2.2.97
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// and so fontconfig-2.3.0 (2005).
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#ifndef FC_FAMILYLANG
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#define FC_FAMILYLANG "familylang"
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#endif
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#ifndef FC_FULLNAME
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#define FC_FULLNAME "fullname"
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#endif
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static PRFuncPtr
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FindFunctionSymbol(const char *name)
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{
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PRLibrary *lib = nullptr;
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PRFuncPtr result = PR_FindFunctionSymbolAndLibrary(name, &lib);
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if (lib) {
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PR_UnloadLibrary(lib);
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}
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return result;
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}
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static bool HasChar(FcPattern *aFont, FcChar32 wc)
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{
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FcCharSet *charset = NULL;
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FcPatternGetCharSet(aFont, FC_CHARSET, 0, &charset);
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return charset && FcCharSetHasChar(charset, wc);
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}
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/**
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* gfxFcFontEntry:
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*
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* An abstract base class of for gfxFontEntry implementations used by
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* gfxFcFont and gfxUserFontSet.
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*/
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class gfxFcFontEntry : public gfxFontEntry {
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public:
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// For all FontEntrys attached to gfxFcFonts, there will be only one
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// pattern in this array. This is always a font pattern, not a fully
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// resolved pattern. gfxFcFont only uses this to construct a PangoFont.
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//
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// FontEntrys for src:local() fonts in gfxUserFontSet may return more than
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// one pattern. (See comment in gfxUserFcFontEntry.)
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const nsTArray< nsCountedRef<FcPattern> >& GetPatterns()
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{
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return mPatterns;
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}
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static gfxFcFontEntry *LookupFontEntry(cairo_font_face_t *aFace)
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{
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return static_cast<gfxFcFontEntry*>
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(cairo_font_face_get_user_data(aFace, &sFontEntryKey));
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}
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// override the gfxFontEntry impl to read the name from fontconfig
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// instead of trying to get the 'name' table, as we don't implement
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// GetFontTable() here
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virtual nsString RealFaceName();
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// This is needed to make gfxFontEntry::HasCharacter(aCh) work.
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virtual bool TestCharacterMap(uint32_t aCh)
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{
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for (uint32_t i = 0; i < mPatterns.Length(); ++i) {
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if (HasChar(mPatterns[i], aCh)) {
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return true;
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}
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}
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return false;
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}
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protected:
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gfxFcFontEntry(const nsAString& aName)
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: gfxFontEntry(aName)
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{
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}
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// One pattern is the common case and some subclasses rely on successful
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// addition of the first element to the array.
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AutoFallibleTArray<nsCountedRef<FcPattern>,1> mPatterns;
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static cairo_user_data_key_t sFontEntryKey;
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};
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cairo_user_data_key_t gfxFcFontEntry::sFontEntryKey;
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nsString
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gfxFcFontEntry::RealFaceName()
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{
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FcChar8 *name;
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if (!mPatterns.IsEmpty()) {
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if (FcPatternGetString(mPatterns[0],
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FC_FULLNAME, 0, &name) == FcResultMatch) {
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return NS_ConvertUTF8toUTF16((const char*)name);
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}
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if (FcPatternGetString(mPatterns[0],
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FC_FAMILY, 0, &name) == FcResultMatch) {
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NS_ConvertUTF8toUTF16 result((const char*)name);
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if (FcPatternGetString(mPatterns[0],
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FC_STYLE, 0, &name) == FcResultMatch) {
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result.AppendLiteral(" ");
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AppendUTF8toUTF16((const char*)name, result);
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}
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return result;
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}
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}
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// fall back to gfxFontEntry implementation (only works for sfnt fonts)
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return gfxFontEntry::RealFaceName();
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}
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/**
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* gfxSystemFcFontEntry:
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*
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* An implementation of gfxFcFontEntry used by gfxFcFonts for system fonts,
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* including those from regular family-name based font selection as well as
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* those from src:local().
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*
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* All gfxFcFonts using the same cairo_font_face_t share the same FontEntry.
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*/
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class gfxSystemFcFontEntry : public gfxFcFontEntry {
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public:
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// For memory efficiency, aFontPattern should be a font pattern,
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// not a fully resolved pattern.
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gfxSystemFcFontEntry(cairo_font_face_t *aFontFace,
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FcPattern *aFontPattern,
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const nsAString& aName)
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: gfxFcFontEntry(aName), mFontFace(aFontFace),
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mFTFace(nullptr), mFTFaceInitialized(false)
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{
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cairo_font_face_reference(mFontFace);
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cairo_font_face_set_user_data(mFontFace, &sFontEntryKey, this, NULL);
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mPatterns.AppendElement();
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// mPatterns is an nsAutoTArray with 1 space always available, so the
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// AppendElement always succeeds.
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mPatterns[0] = aFontPattern;
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FcChar8 *name;
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if (FcPatternGetString(aFontPattern,
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FC_FAMILY, 0, &name) == FcResultMatch) {
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mFamilyName = NS_ConvertUTF8toUTF16((const char*)name);
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}
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}
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~gfxSystemFcFontEntry()
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{
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cairo_font_face_set_user_data(mFontFace, &sFontEntryKey, NULL, NULL);
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cairo_font_face_destroy(mFontFace);
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}
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virtual void ForgetHBFace();
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virtual void ReleaseGrFace(gr_face* aFace);
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protected:
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virtual nsresult
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CopyFontTable(uint32_t aTableTag, FallibleTArray<uint8_t>& aBuffer) MOZ_OVERRIDE;
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void MaybeReleaseFTFace();
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private:
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cairo_font_face_t *mFontFace;
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FT_Face mFTFace;
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bool mFTFaceInitialized;
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};
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nsresult
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gfxSystemFcFontEntry::CopyFontTable(uint32_t aTableTag,
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FallibleTArray<uint8_t>& aBuffer)
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{
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if (!mFTFaceInitialized) {
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mFTFaceInitialized = true;
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FcChar8 *filename;
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if (FcPatternGetString(mPatterns[0], FC_FILE, 0, &filename) != FcResultMatch) {
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return NS_ERROR_FAILURE;
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}
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int index;
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if (FcPatternGetInteger(mPatterns[0], FC_INDEX, 0, &index) != FcResultMatch) {
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index = 0; // default to 0 if not found in pattern
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}
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if (FT_New_Face(gfxPangoFontGroup::GetFTLibrary(),
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(const char*)filename, index, &mFTFace) != 0) {
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return NS_ERROR_FAILURE;
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}
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}
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if (!mFTFace) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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FT_ULong length = 0;
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if (FT_Load_Sfnt_Table(mFTFace, aTableTag, 0, nullptr, &length) != 0) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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if (!aBuffer.SetLength(length)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (FT_Load_Sfnt_Table(mFTFace, aTableTag, 0, aBuffer.Elements(), &length) != 0) {
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aBuffer.Clear();
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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void
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gfxSystemFcFontEntry::MaybeReleaseFTFace()
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{
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// don't release if either HB or Gr face still exists
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if (mHBFace || mGrFace) {
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return;
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}
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if (mFTFace) {
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FT_Done_Face(mFTFace);
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mFTFace = nullptr;
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}
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mFTFaceInitialized = false;
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}
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void
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gfxSystemFcFontEntry::ForgetHBFace()
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{
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gfxFontEntry::ForgetHBFace();
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MaybeReleaseFTFace();
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}
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void
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gfxSystemFcFontEntry::ReleaseGrFace(gr_face* aFace)
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{
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gfxFontEntry::ReleaseGrFace(aFace);
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MaybeReleaseFTFace();
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}
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// A namespace for @font-face family names in FcPatterns so that fontconfig
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// aliases do not pick up families from @font-face rules and so that
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// fontconfig rules can distinguish between web fonts and platform fonts.
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// http://lists.freedesktop.org/archives/fontconfig/2008-November/003037.html
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#define FONT_FACE_FAMILY_PREFIX "@font-face:"
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/**
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* gfxUserFcFontEntry:
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*
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* An abstract class for objects in a gfxUserFontSet that can provide
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* FcPattern* handles to fonts.
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*
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* Separate implementations of this class support local fonts from src:local()
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* and web fonts from src:url().
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*/
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// There is a one-to-one correspondence between gfxUserFcFontEntry objects and
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// @font-face rules, but sometimes a one-to-many correspondence between font
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// entries and font patterns.
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//
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// http://www.w3.org/TR/2002/WD-css3-webfonts-20020802#font-descriptions
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// provided a font-size descriptor to specify the sizes supported by the face,
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// but the "Editor's Draft 27 June 2008"
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// http://dev.w3.org/csswg/css3-fonts/#font-resources does not provide such a
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// descriptor, and Mozilla does not recognize such a descriptor.
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//
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// Font face names used in src:local() also do not usually specify a size.
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//
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// PCF format fonts have each size in a different file, and each of these
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// files is referenced by its own pattern, but really these are each
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// different sizes of one face with one name.
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//
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// Multiple patterns in an entry also effectively deals with a set of
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// PostScript Type 1 font files that all have the same face name but are in
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// several files because of the limit on the number of glyphs in a Type 1 font
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// file. (e.g. Computer Modern.)
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class gfxUserFcFontEntry : public gfxFcFontEntry {
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protected:
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gfxUserFcFontEntry(const gfxProxyFontEntry &aProxyEntry)
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: gfxFcFontEntry(aProxyEntry.Name())
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{
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mItalic = aProxyEntry.mItalic;
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mWeight = aProxyEntry.mWeight;
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mStretch = aProxyEntry.mStretch;
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mIsUserFont = true;
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}
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// Helper function to change a pattern so that it matches the CSS style
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// descriptors and so gets properly sorted in font selection. This also
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// avoids synthetic style effects being added by the renderer when the
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// style of the font itself does not match the descriptor provided by the
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// author.
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void AdjustPatternToCSS(FcPattern *aPattern);
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};
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void
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gfxUserFcFontEntry::AdjustPatternToCSS(FcPattern *aPattern)
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{
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int fontWeight = -1;
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FcPatternGetInteger(aPattern, FC_WEIGHT, 0, &fontWeight);
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int cssWeight = gfxFontconfigUtils::FcWeightForBaseWeight(mWeight / 100);
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if (cssWeight != fontWeight) {
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FcPatternDel(aPattern, FC_WEIGHT);
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FcPatternAddInteger(aPattern, FC_WEIGHT, cssWeight);
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}
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int fontSlant;
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FcResult res = FcPatternGetInteger(aPattern, FC_SLANT, 0, &fontSlant);
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// gfxFontEntry doesn't understand the difference between oblique
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// and italic.
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if (res != FcResultMatch ||
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IsItalic() != (fontSlant != FC_SLANT_ROMAN)) {
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FcPatternDel(aPattern, FC_SLANT);
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FcPatternAddInteger(aPattern, FC_SLANT,
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IsItalic() ? FC_SLANT_OBLIQUE : FC_SLANT_ROMAN);
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}
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int fontWidth = -1;
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FcPatternGetInteger(aPattern, FC_WIDTH, 0, &fontWidth);
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int cssWidth = gfxFontconfigUtils::FcWidthForThebesStretch(mStretch);
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if (cssWidth != fontWidth) {
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FcPatternDel(aPattern, FC_WIDTH);
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FcPatternAddInteger(aPattern, FC_WIDTH, cssWidth);
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}
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// Ensure that there is a fullname property (if there is a family
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// property) so that fontconfig rules can identify the real name of the
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// font, because the family property will be replaced.
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FcChar8 *unused;
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if (FcPatternGetString(aPattern,
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FC_FULLNAME, 0, &unused) == FcResultNoMatch) {
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nsAutoCString fullname;
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if (gfxFontconfigUtils::GetFullnameFromFamilyAndStyle(aPattern,
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&fullname)) {
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FcPatternAddString(aPattern, FC_FULLNAME,
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gfxFontconfigUtils::ToFcChar8(fullname));
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}
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}
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nsAutoCString family;
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family.Append(FONT_FACE_FAMILY_PREFIX);
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AppendUTF16toUTF8(Name(), family);
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FcPatternDel(aPattern, FC_FAMILY);
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FcPatternDel(aPattern, FC_FAMILYLANG);
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FcPatternAddString(aPattern, FC_FAMILY,
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gfxFontconfigUtils::ToFcChar8(family));
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}
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/**
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* gfxLocalFcFontEntry:
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*
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* An implementation of gfxUserFcFontEntry for local fonts from src:local().
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*
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* This class is used only in gfxUserFontSet and for providing FcPattern*
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* handles to system fonts for font selection. gfxFcFonts created from these
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* patterns will use gfxSystemFcFontEntrys, which may be shared with
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* gfxFcFonts from regular family-name based font selection.
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*/
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class gfxLocalFcFontEntry : public gfxUserFcFontEntry {
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public:
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gfxLocalFcFontEntry(const gfxProxyFontEntry &aProxyEntry,
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const nsTArray< nsCountedRef<FcPattern> >& aPatterns)
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: gfxUserFcFontEntry(aProxyEntry)
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{
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if (!mPatterns.SetCapacity(aPatterns.Length()))
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return; // OOM
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for (uint32_t i = 0; i < aPatterns.Length(); ++i) {
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FcPattern *pattern = FcPatternDuplicate(aPatterns.ElementAt(i));
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if (!pattern)
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return; // OOM
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AdjustPatternToCSS(pattern);
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mPatterns.AppendElement();
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mPatterns[i].own(pattern);
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}
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mIsLocalUserFont = true;
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}
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};
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/**
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* gfxDownloadedFcFontEntry:
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*
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* An implementation of gfxFcFontEntry for web fonts from src:url().
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*
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* When a cairo_font_face_t is created for these fonts, the cairo_font_face_t
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* keeps a reference to the FontEntry to keep the font data alive.
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*/
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class gfxDownloadedFcFontEntry : public gfxUserFcFontEntry {
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public:
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// This takes ownership of the face and its underlying data
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gfxDownloadedFcFontEntry(const gfxProxyFontEntry &aProxyEntry,
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const uint8_t *aData, FT_Face aFace)
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: gfxUserFcFontEntry(aProxyEntry), mFontData(aData), mFace(aFace)
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{
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NS_PRECONDITION(aFace != NULL, "aFace is NULL!");
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InitPattern();
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}
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virtual ~gfxDownloadedFcFontEntry();
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// Returns true on success
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bool SetCairoFace(cairo_font_face_t *aFace);
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virtual hb_blob_t* GetFontTable(uint32_t aTableTag) MOZ_OVERRIDE;
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protected:
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void InitPattern();
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// mFontData holds the data used to instantiate the FT_Face;
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// this has to persist until we are finished with the face,
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// then be released with NS_Free().
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const uint8_t* mFontData;
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FT_Face mFace;
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};
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// A property for recording gfxDownloadedFcFontEntrys on FcPatterns.
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static const char *kFontEntryFcProp = "-moz-font-entry";
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static FcBool AddDownloadedFontEntry(FcPattern *aPattern,
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gfxDownloadedFcFontEntry *aFontEntry)
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{
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FcValue value;
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value.type = FcTypeFTFace; // void* field of union
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value.u.f = aFontEntry;
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return FcPatternAdd(aPattern, kFontEntryFcProp, value, FcFalse);
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}
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static FcBool DelDownloadedFontEntry(FcPattern *aPattern)
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{
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return FcPatternDel(aPattern, kFontEntryFcProp);
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}
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static gfxDownloadedFcFontEntry *GetDownloadedFontEntry(FcPattern *aPattern)
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{
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FcValue value;
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if (FcPatternGet(aPattern, kFontEntryFcProp, 0, &value) != FcResultMatch)
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return nullptr;
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if (value.type != FcTypeFTFace) {
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NS_NOTREACHED("Wrong type for -moz-font-entry font property");
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return nullptr;
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}
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return static_cast<gfxDownloadedFcFontEntry*>(value.u.f);
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}
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|
gfxDownloadedFcFontEntry::~gfxDownloadedFcFontEntry()
|
|
{
|
|
if (mPatterns.Length() != 0) {
|
|
// Remove back reference to this font entry and the face in case
|
|
// anyone holds a reference to the pattern.
|
|
NS_ASSERTION(mPatterns.Length() == 1,
|
|
"More than one pattern in gfxDownloadedFcFontEntry!");
|
|
DelDownloadedFontEntry(mPatterns[0]);
|
|
FcPatternDel(mPatterns[0], FC_FT_FACE);
|
|
}
|
|
FT_Done_Face(mFace);
|
|
NS_Free((void*)mFontData);
|
|
}
|
|
|
|
typedef FcPattern* (*QueryFaceFunction)(const FT_Face face,
|
|
const FcChar8 *file, int id,
|
|
FcBlanks *blanks);
|
|
|
|
void
|
|
gfxDownloadedFcFontEntry::InitPattern()
|
|
{
|
|
static QueryFaceFunction sQueryFacePtr =
|
|
reinterpret_cast<QueryFaceFunction>
|
|
(FindFunctionSymbol("FcFreeTypeQueryFace"));
|
|
FcPattern *pattern;
|
|
|
|
// FcFreeTypeQueryFace is the same function used to construct patterns for
|
|
// system fonts and so is the preferred function to use for this purpose.
|
|
// This will set up the langset property, which helps with sorting, and
|
|
// the foundry, fullname, and fontversion properties, which properly
|
|
// identify the font to fontconfig rules. However, FcFreeTypeQueryFace is
|
|
// available only from fontconfig-2.4.2 (December 2006). (CentOS 5.0 has
|
|
// fontconfig-2.4.1.)
|
|
if (sQueryFacePtr) {
|
|
// The "file" argument cannot be NULL (in fontconfig-2.6.0 at least).
|
|
// The dummy file passed here is removed below.
|
|
//
|
|
// When fontconfig scans the system fonts, FcConfigGetBlanks(NULL) is
|
|
// passed as the "blanks" argument, which provides that unexpectedly
|
|
// blank glyphs are elided. Here, however, we pass NULL for "blanks",
|
|
// effectively assuming that, if the font has a blank glyph, then the
|
|
// author intends any associated character to be rendered blank.
|
|
pattern =
|
|
(*sQueryFacePtr)(mFace, gfxFontconfigUtils::ToFcChar8(""), 0, NULL);
|
|
if (!pattern)
|
|
// Either OOM, or fontconfig chose to skip this font because it
|
|
// has "no encoded characters", which I think means "BDF and PCF
|
|
// fonts which are not in Unicode (or the effectively equivalent
|
|
// ISO Latin-1) encoding".
|
|
return;
|
|
|
|
// These properties don't make sense for this face without a file.
|
|
FcPatternDel(pattern, FC_FILE);
|
|
FcPatternDel(pattern, FC_INDEX);
|
|
|
|
} else {
|
|
// Do the minimum necessary to construct a pattern for sorting.
|
|
|
|
// FC_CHARSET is vital to determine which characters are supported.
|
|
nsAutoRef<FcCharSet> charset(FcFreeTypeCharSet(mFace, NULL));
|
|
// If there are no characters then assume we don't know how to read
|
|
// this font.
|
|
if (!charset || FcCharSetCount(charset) == 0)
|
|
return;
|
|
|
|
pattern = FcPatternCreate();
|
|
FcPatternAddCharSet(pattern, FC_CHARSET, charset);
|
|
|
|
// FC_PIXEL_SIZE can be important for font selection of fixed-size
|
|
// fonts.
|
|
if (!(mFace->face_flags & FT_FACE_FLAG_SCALABLE)) {
|
|
for (FT_Int i = 0; i < mFace->num_fixed_sizes; ++i) {
|
|
#if HAVE_FT_BITMAP_SIZE_Y_PPEM
|
|
double size = FLOAT_FROM_26_6(mFace->available_sizes[i].y_ppem);
|
|
#else
|
|
double size = mFace->available_sizes[i].height;
|
|
#endif
|
|
FcPatternAddDouble (pattern, FC_PIXEL_SIZE, size);
|
|
}
|
|
|
|
// Not sure whether this is important;
|
|
// imitating FcFreeTypeQueryFace:
|
|
FcPatternAddBool (pattern, FC_ANTIALIAS, FcFalse);
|
|
}
|
|
|
|
// Setting up the FC_LANGSET property is very difficult with the APIs
|
|
// available prior to FcFreeTypeQueryFace. Having no FC_LANGSET
|
|
// property seems better than having a property with an empty LangSet.
|
|
// With no FC_LANGSET property, fontconfig sort functions will
|
|
// consider this face to have the same priority as (otherwise equal)
|
|
// faces that have support for the primary requested language, but
|
|
// will not consider any language to have been satisfied (and so will
|
|
// continue to look for a face with language support in fallback
|
|
// fonts).
|
|
}
|
|
|
|
AdjustPatternToCSS(pattern);
|
|
|
|
FcPatternAddFTFace(pattern, FC_FT_FACE, mFace);
|
|
AddDownloadedFontEntry(pattern, this);
|
|
|
|
// There is never more than one pattern
|
|
mPatterns.AppendElement();
|
|
mPatterns[0].own(pattern);
|
|
}
|
|
|
|
static void ReleaseDownloadedFontEntry(void *data)
|
|
{
|
|
gfxDownloadedFcFontEntry *downloadedFontEntry =
|
|
static_cast<gfxDownloadedFcFontEntry*>(data);
|
|
NS_RELEASE(downloadedFontEntry);
|
|
}
|
|
|
|
bool gfxDownloadedFcFontEntry::SetCairoFace(cairo_font_face_t *aFace)
|
|
{
|
|
if (CAIRO_STATUS_SUCCESS !=
|
|
cairo_font_face_set_user_data(aFace, &sFontEntryKey, this,
|
|
ReleaseDownloadedFontEntry))
|
|
return false;
|
|
|
|
// Hold a reference to this font entry to keep the font face data.
|
|
NS_ADDREF(this);
|
|
return true;
|
|
}
|
|
|
|
static int
|
|
DirEntryCmp(const void* aKey, const void* aItem)
|
|
{
|
|
int32_t tag = *static_cast<const int32_t*>(aKey);
|
|
const TableDirEntry* entry = static_cast<const TableDirEntry*>(aItem);
|
|
return tag - int32_t(entry->tag);
|
|
}
|
|
|
|
hb_blob_t *
|
|
gfxDownloadedFcFontEntry::GetFontTable(uint32_t aTableTag)
|
|
{
|
|
// The entry already owns the (sanitized) sfnt data in mFontData,
|
|
// so we can just return a blob that "wraps" the appropriate chunk of it.
|
|
// The blob should not attempt to free its data, as the entire sfnt data
|
|
// will be freed when the font entry is deleted.
|
|
const SFNTHeader* header = reinterpret_cast<const SFNTHeader*>(mFontData);
|
|
const TableDirEntry* dir = reinterpret_cast<const TableDirEntry*>(header + 1);
|
|
dir = static_cast<const TableDirEntry*>
|
|
(bsearch(&aTableTag, dir, uint16_t(header->numTables),
|
|
sizeof(TableDirEntry), DirEntryCmp));
|
|
if (dir) {
|
|
return hb_blob_create(reinterpret_cast<const char*>(mFontData) +
|
|
dir->offset, dir->length,
|
|
HB_MEMORY_MODE_READONLY, nullptr, nullptr);
|
|
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
/*
|
|
* gfxFcFont
|
|
*
|
|
* This is a gfxFont implementation using a CAIRO_FONT_TYPE_FT
|
|
* cairo_scaled_font created from an FcPattern.
|
|
*/
|
|
|
|
class gfxFcFont : public gfxFT2FontBase {
|
|
public:
|
|
virtual ~gfxFcFont();
|
|
static already_AddRefed<gfxFcFont>
|
|
GetOrMakeFont(FcPattern *aRequestedPattern, FcPattern *aFontPattern,
|
|
const gfxFontStyle *aFontStyle);
|
|
|
|
protected:
|
|
virtual bool ShapeText(gfxContext *aContext,
|
|
const PRUnichar *aText,
|
|
uint32_t aOffset,
|
|
uint32_t aLength,
|
|
int32_t aScript,
|
|
gfxShapedText *aShapedText,
|
|
bool aPreferPlatformShaping);
|
|
|
|
bool InitGlyphRunWithPango(const PRUnichar *aString,
|
|
uint32_t aOffset,
|
|
uint32_t aLength,
|
|
int32_t aScript,
|
|
gfxShapedText *aShapedText);
|
|
|
|
private:
|
|
gfxFcFont(cairo_scaled_font_t *aCairoFont, gfxFcFontEntry *aFontEntry,
|
|
const gfxFontStyle *aFontStyle);
|
|
|
|
// key for locating a gfxFcFont corresponding to a cairo_scaled_font
|
|
static cairo_user_data_key_t sGfxFontKey;
|
|
};
|
|
|
|
/**
|
|
* gfxFcFontSet:
|
|
*
|
|
* Translation from a desired FcPattern to a sorted set of font references
|
|
* (fontconfig cache data) and (when needed) fonts.
|
|
*/
|
|
|
|
class gfxFcFontSet {
|
|
public:
|
|
NS_INLINE_DECL_REFCOUNTING(gfxFcFontSet)
|
|
|
|
explicit gfxFcFontSet(FcPattern *aPattern,
|
|
gfxUserFontSet *aUserFontSet)
|
|
: mSortPattern(aPattern), mUserFontSet(aUserFontSet),
|
|
mFcFontsTrimmed(0),
|
|
mHaveFallbackFonts(false)
|
|
{
|
|
bool waitForUserFont;
|
|
mFcFontSet = SortPreferredFonts(waitForUserFont);
|
|
mWaitingForUserFont = waitForUserFont;
|
|
}
|
|
|
|
// A reference is held by the FontSet.
|
|
// The caller may add a ref to keep the font alive longer than the FontSet.
|
|
gfxFcFont *GetFontAt(uint32_t i, const gfxFontStyle *aFontStyle)
|
|
{
|
|
if (i >= mFonts.Length() || !mFonts[i].mFont) {
|
|
// GetFontPatternAt sets up mFonts
|
|
FcPattern *fontPattern = GetFontPatternAt(i);
|
|
if (!fontPattern)
|
|
return NULL;
|
|
|
|
mFonts[i].mFont =
|
|
gfxFcFont::GetOrMakeFont(mSortPattern, fontPattern,
|
|
aFontStyle);
|
|
}
|
|
return mFonts[i].mFont;
|
|
}
|
|
|
|
FcPattern *GetFontPatternAt(uint32_t i);
|
|
|
|
bool WaitingForUserFont() const {
|
|
return mWaitingForUserFont;
|
|
}
|
|
|
|
private:
|
|
nsReturnRef<FcFontSet> SortPreferredFonts(bool& aWaitForUserFont);
|
|
nsReturnRef<FcFontSet> SortFallbackFonts();
|
|
|
|
struct FontEntry {
|
|
explicit FontEntry(FcPattern *aPattern) : mPattern(aPattern) {}
|
|
nsCountedRef<FcPattern> mPattern;
|
|
nsRefPtr<gfxFcFont> mFont;
|
|
};
|
|
|
|
struct LangSupportEntry {
|
|
LangSupportEntry(FcChar8 *aLang, FcLangResult aSupport) :
|
|
mLang(aLang), mBestSupport(aSupport) {}
|
|
FcChar8 *mLang;
|
|
FcLangResult mBestSupport;
|
|
};
|
|
|
|
public:
|
|
// public for nsTArray
|
|
class LangComparator {
|
|
public:
|
|
bool Equals(const LangSupportEntry& a, const FcChar8 *b) const
|
|
{
|
|
return FcStrCmpIgnoreCase(a.mLang, b) == 0;
|
|
}
|
|
};
|
|
|
|
private:
|
|
// The requested pattern
|
|
nsCountedRef<FcPattern> mSortPattern;
|
|
// Fonts from @font-face rules
|
|
nsRefPtr<gfxUserFontSet> mUserFontSet;
|
|
// A (trimmed) list of font patterns and fonts that is built up as
|
|
// required.
|
|
nsTArray<FontEntry> mFonts;
|
|
// Holds a list of font patterns that will be trimmed. This is first set
|
|
// to a list of preferred fonts. Then, if/when all the preferred fonts
|
|
// have been trimmed and added to mFonts, this is set to a list of
|
|
// fallback fonts.
|
|
nsAutoRef<FcFontSet> mFcFontSet;
|
|
// The set of characters supported by the fonts in mFonts.
|
|
nsAutoRef<FcCharSet> mCharSet;
|
|
// The index of the next font in mFcFontSet that has not yet been
|
|
// considered for mFonts.
|
|
int mFcFontsTrimmed;
|
|
// True iff fallback fonts are either stored in mFcFontSet or have been
|
|
// trimmed and added to mFonts (so that mFcFontSet is NULL).
|
|
bool mHaveFallbackFonts;
|
|
// True iff there was a user font set with pending downloads,
|
|
// so the set may be updated when downloads complete
|
|
bool mWaitingForUserFont;
|
|
};
|
|
|
|
// Find the FcPattern for an @font-face font suitable for CSS family |aFamily|
|
|
// and style |aStyle| properties.
|
|
static const nsTArray< nsCountedRef<FcPattern> >*
|
|
FindFontPatterns(gfxUserFontSet *mUserFontSet,
|
|
const nsACString &aFamily, uint8_t aStyle,
|
|
uint16_t aWeight, int16_t aStretch,
|
|
bool& aWaitForUserFont)
|
|
{
|
|
// Convert to UTF16
|
|
NS_ConvertUTF8toUTF16 utf16Family(aFamily);
|
|
|
|
// needsBold is not used here. Instead synthetic bold is enabled through
|
|
// FcFontRenderPrepare when the weight in the requested pattern is
|
|
// compared against the weight in the font pattern.
|
|
bool needsBold;
|
|
|
|
gfxFontStyle style;
|
|
style.style = aStyle;
|
|
style.weight = aWeight;
|
|
style.stretch = aStretch;
|
|
|
|
gfxUserFcFontEntry *fontEntry = nullptr;
|
|
gfxFontFamily *family = mUserFontSet->GetFamily(utf16Family);
|
|
if (family) {
|
|
fontEntry = static_cast<gfxUserFcFontEntry*>
|
|
(mUserFontSet->FindFontEntry(family, style, needsBold,
|
|
aWaitForUserFont));
|
|
|
|
// Accept synthetic oblique for italic and oblique.
|
|
if (!fontEntry && aStyle != NS_FONT_STYLE_NORMAL) {
|
|
style.style = NS_FONT_STYLE_NORMAL;
|
|
fontEntry = static_cast<gfxUserFcFontEntry*>
|
|
(mUserFontSet->FindFontEntry(family, style, needsBold,
|
|
aWaitForUserFont));
|
|
}
|
|
}
|
|
|
|
if (!fontEntry) {
|
|
return nullptr;
|
|
}
|
|
|
|
return &fontEntry->GetPatterns();
|
|
}
|
|
|
|
typedef FcBool (*FcPatternRemoveFunction)(FcPattern *p, const char *object,
|
|
int id);
|
|
|
|
// FcPatternRemove is available in fontconfig-2.3.0 (2005)
|
|
static FcBool
|
|
moz_FcPatternRemove(FcPattern *p, const char *object, int id)
|
|
{
|
|
static FcPatternRemoveFunction sFcPatternRemovePtr =
|
|
reinterpret_cast<FcPatternRemoveFunction>
|
|
(FindFunctionSymbol("FcPatternRemove"));
|
|
|
|
if (!sFcPatternRemovePtr)
|
|
return FcFalse;
|
|
|
|
return (*sFcPatternRemovePtr)(p, object, id);
|
|
}
|
|
|
|
// fontconfig always prefers a matching family to a matching slant, but CSS
|
|
// mostly prioritizes slant. The logic here is from CSS 2.1.
|
|
static bool
|
|
SlantIsAcceptable(FcPattern *aFont, int aRequestedSlant)
|
|
{
|
|
// CSS accepts (possibly synthetic) oblique for italic.
|
|
if (aRequestedSlant == FC_SLANT_ITALIC)
|
|
return true;
|
|
|
|
int slant;
|
|
FcResult result = FcPatternGetInteger(aFont, FC_SLANT, 0, &slant);
|
|
// Not having a value would be strange.
|
|
// fontconfig sort and match functions would consider no value a match.
|
|
if (result != FcResultMatch)
|
|
return true;
|
|
|
|
switch (aRequestedSlant) {
|
|
case FC_SLANT_ROMAN:
|
|
// CSS requires an exact match
|
|
return slant == aRequestedSlant;
|
|
case FC_SLANT_OBLIQUE:
|
|
// Accept synthetic oblique from Roman,
|
|
// but CSS doesn't accept italic.
|
|
return slant != FC_SLANT_ITALIC;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// fontconfig prefers a matching family or lang to pixelsize of bitmap
|
|
// fonts. CSS suggests a tolerance of 20% on pixelsize.
|
|
static bool
|
|
SizeIsAcceptable(FcPattern *aFont, double aRequestedSize)
|
|
{
|
|
double size;
|
|
int v = 0;
|
|
while (FcPatternGetDouble(aFont,
|
|
FC_PIXEL_SIZE, v, &size) == FcResultMatch) {
|
|
++v;
|
|
if (5.0 * fabs(size - aRequestedSize) < aRequestedSize)
|
|
return true;
|
|
}
|
|
|
|
// No size means scalable
|
|
return v == 0;
|
|
}
|
|
|
|
// Sorting only the preferred fonts first usually saves having to sort through
|
|
// every font on the system.
|
|
nsReturnRef<FcFontSet>
|
|
gfxFcFontSet::SortPreferredFonts(bool &aWaitForUserFont)
|
|
{
|
|
aWaitForUserFont = false;
|
|
|
|
gfxFontconfigUtils *utils = gfxFontconfigUtils::GetFontconfigUtils();
|
|
if (!utils)
|
|
return nsReturnRef<FcFontSet>();
|
|
|
|
// The list of families in mSortPattern has values with both weak and
|
|
// strong bindings. Values with strong bindings should be preferred.
|
|
// Values with weak bindings are default fonts that should be considered
|
|
// only when the font provides the best support for a requested language
|
|
// or after other fonts have satisfied all the requested languages.
|
|
//
|
|
// There are no direct fontconfig APIs to get the binding type. The
|
|
// binding only takes effect in the sort and match functions.
|
|
|
|
// |requiredLangs| is a list of requested languages that have not yet been
|
|
// satisfied. gfxFontconfigUtils only sets one FC_LANG property value,
|
|
// but FcConfigSubstitute may add more values (e.g. prepending "en" to
|
|
// "ja" will use western fonts to render Latin/Arabic numerals in Japanese
|
|
// text.)
|
|
nsAutoTArray<LangSupportEntry,10> requiredLangs;
|
|
for (int v = 0; ; ++v) {
|
|
FcChar8 *lang;
|
|
FcResult result = FcPatternGetString(mSortPattern, FC_LANG, v, &lang);
|
|
if (result != FcResultMatch) {
|
|
// No need to check FcPatternGetLangSet() because
|
|
// gfxFontconfigUtils sets only a string value for FC_LANG and
|
|
// FcConfigSubstitute cannot add LangSets.
|
|
NS_ASSERTION(result != FcResultTypeMismatch,
|
|
"Expected a string for FC_LANG");
|
|
break;
|
|
}
|
|
|
|
if (!requiredLangs.Contains(lang, LangComparator())) {
|
|
FcLangResult bestLangSupport = utils->GetBestLangSupport(lang);
|
|
if (bestLangSupport != FcLangDifferentLang) {
|
|
requiredLangs.
|
|
AppendElement(LangSupportEntry(lang, bestLangSupport));
|
|
}
|
|
}
|
|
}
|
|
|
|
nsAutoRef<FcFontSet> fontSet(FcFontSetCreate());
|
|
if (!fontSet)
|
|
return fontSet.out();
|
|
|
|
// FcDefaultSubstitute() ensures a slant on mSortPattern, but, if that ever
|
|
// doesn't happen, Roman will be used.
|
|
int requestedSlant = FC_SLANT_ROMAN;
|
|
FcPatternGetInteger(mSortPattern, FC_SLANT, 0, &requestedSlant);
|
|
double requestedSize = -1.0;
|
|
FcPatternGetDouble(mSortPattern, FC_PIXEL_SIZE, 0, &requestedSize);
|
|
|
|
nsTHashtable<gfxFontconfigUtils::DepFcStrEntry> existingFamilies;
|
|
existingFamilies.Init(50);
|
|
FcChar8 *family;
|
|
for (int v = 0;
|
|
FcPatternGetString(mSortPattern,
|
|
FC_FAMILY, v, &family) == FcResultMatch; ++v) {
|
|
const nsTArray< nsCountedRef<FcPattern> > *familyFonts = nullptr;
|
|
|
|
// Is this an @font-face family?
|
|
bool isUserFont = false;
|
|
if (mUserFontSet) {
|
|
// Have some @font-face definitions
|
|
|
|
nsDependentCString cFamily(gfxFontconfigUtils::ToCString(family));
|
|
NS_NAMED_LITERAL_CSTRING(userPrefix, FONT_FACE_FAMILY_PREFIX);
|
|
|
|
if (StringBeginsWith(cFamily, userPrefix)) {
|
|
isUserFont = true;
|
|
|
|
// Trim off the prefix
|
|
nsDependentCSubstring cssFamily(cFamily, userPrefix.Length());
|
|
|
|
uint8_t thebesStyle =
|
|
gfxFontconfigUtils::FcSlantToThebesStyle(requestedSlant);
|
|
uint16_t thebesWeight =
|
|
gfxFontconfigUtils::GetThebesWeight(mSortPattern);
|
|
int16_t thebesStretch =
|
|
gfxFontconfigUtils::GetThebesStretch(mSortPattern);
|
|
|
|
bool waitForUserFont;
|
|
familyFonts = FindFontPatterns(mUserFontSet, cssFamily,
|
|
thebesStyle,
|
|
thebesWeight, thebesStretch,
|
|
waitForUserFont);
|
|
if (waitForUserFont) {
|
|
aWaitForUserFont = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!isUserFont) {
|
|
familyFonts = &utils->GetFontsForFamily(family);
|
|
}
|
|
|
|
if (!familyFonts || familyFonts->Length() == 0) {
|
|
// There are no fonts matching this family, so there is no point
|
|
// in searching for this family in the FontSort.
|
|
//
|
|
// Perhaps the original pattern should be retained for
|
|
// FcFontRenderPrepare. However, the only a useful config
|
|
// substitution test against missing families that i can imagine
|
|
// would only be interested in the preferred family
|
|
// (qual="first"), so always keep the first family and use the
|
|
// same pattern for Sort and RenderPrepare.
|
|
if (v != 0 && moz_FcPatternRemove(mSortPattern, FC_FAMILY, v)) {
|
|
--v;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
// Aliases seem to often end up occurring more than once, but
|
|
// duplicate families can't be removed from the sort pattern without
|
|
// knowing whether duplicates have the same binding.
|
|
gfxFontconfigUtils::DepFcStrEntry *entry =
|
|
existingFamilies.PutEntry(family);
|
|
if (entry) {
|
|
if (entry->mKey) // old entry
|
|
continue;
|
|
|
|
entry->mKey = family; // initialize new entry
|
|
}
|
|
|
|
for (uint32_t f = 0; f < familyFonts->Length(); ++f) {
|
|
FcPattern *font = familyFonts->ElementAt(f);
|
|
|
|
// Fix up the family name of user-font patterns, as the same
|
|
// font entry may be used (via the UserFontCache) for multiple
|
|
// CSS family names
|
|
if (isUserFont) {
|
|
font = FcPatternDuplicate(font);
|
|
FcPatternDel(font, FC_FAMILY);
|
|
FcPatternAddString(font, FC_FAMILY, family);
|
|
}
|
|
|
|
// User fonts are already filtered by slant (but not size) in
|
|
// mUserFontSet->FindFontEntry().
|
|
if (!isUserFont && !SlantIsAcceptable(font, requestedSlant))
|
|
continue;
|
|
if (requestedSize != -1.0 && !SizeIsAcceptable(font, requestedSize))
|
|
continue;
|
|
|
|
for (uint32_t r = 0; r < requiredLangs.Length(); ++r) {
|
|
const LangSupportEntry& entry = requiredLangs[r];
|
|
FcLangResult support =
|
|
gfxFontconfigUtils::GetLangSupport(font, entry.mLang);
|
|
if (support <= entry.mBestSupport) { // lower is better
|
|
requiredLangs.RemoveElementAt(r);
|
|
--r;
|
|
}
|
|
}
|
|
|
|
// FcFontSetDestroy will remove a reference but FcFontSetAdd
|
|
// does _not_ take a reference!
|
|
if (FcFontSetAdd(fontSet, font)) {
|
|
// We don't add a reference here for user fonts, because we're
|
|
// using a local clone of the pattern (see above) in order to
|
|
// override the family name
|
|
if (!isUserFont) {
|
|
FcPatternReference(font);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
FcPattern *truncateMarker = NULL;
|
|
for (uint32_t r = 0; r < requiredLangs.Length(); ++r) {
|
|
const nsTArray< nsCountedRef<FcPattern> >& langFonts =
|
|
utils->GetFontsForLang(requiredLangs[r].mLang);
|
|
|
|
bool haveLangFont = false;
|
|
for (uint32_t f = 0; f < langFonts.Length(); ++f) {
|
|
FcPattern *font = langFonts[f];
|
|
if (!SlantIsAcceptable(font, requestedSlant))
|
|
continue;
|
|
if (requestedSize != -1.0 && !SizeIsAcceptable(font, requestedSize))
|
|
continue;
|
|
|
|
haveLangFont = true;
|
|
if (FcFontSetAdd(fontSet, font)) {
|
|
FcPatternReference(font);
|
|
}
|
|
}
|
|
|
|
if (!haveLangFont && langFonts.Length() > 0) {
|
|
// There is a font that supports this language but it didn't pass
|
|
// the slant and size criteria. Weak default font families should
|
|
// not be considered until the language has been satisfied.
|
|
//
|
|
// Insert a font that supports the language so that it will mark
|
|
// the position of fonts from weak families in the sorted set and
|
|
// they can be removed. The language and weak families will be
|
|
// considered in the fallback fonts, which use fontconfig's
|
|
// algorithm.
|
|
//
|
|
// Of the fonts that don't meet slant and size criteria, strong
|
|
// default font families should be considered before (other) fonts
|
|
// for this language, so this marker font will be removed (as well
|
|
// as the fonts from weak families), and strong families will be
|
|
// reconsidered in the fallback fonts.
|
|
FcPattern *font = langFonts[0];
|
|
if (FcFontSetAdd(fontSet, font)) {
|
|
FcPatternReference(font);
|
|
truncateMarker = font;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
FcFontSet *sets[1] = { fontSet };
|
|
FcResult result;
|
|
#ifdef SOLARIS
|
|
// Get around a crash of FcFontSetSort when FcConfig is NULL
|
|
// Solaris's FcFontSetSort needs an FcConfig (bug 474758)
|
|
fontSet.own(FcFontSetSort(FcConfigGetCurrent(), sets, 1, mSortPattern,
|
|
FcFalse, NULL, &result));
|
|
#else
|
|
fontSet.own(FcFontSetSort(NULL, sets, 1, mSortPattern,
|
|
FcFalse, NULL, &result));
|
|
#endif
|
|
|
|
if (truncateMarker != NULL && fontSet) {
|
|
nsAutoRef<FcFontSet> truncatedSet(FcFontSetCreate());
|
|
|
|
for (int f = 0; f < fontSet->nfont; ++f) {
|
|
FcPattern *font = fontSet->fonts[f];
|
|
if (font == truncateMarker)
|
|
break;
|
|
|
|
if (FcFontSetAdd(truncatedSet, font)) {
|
|
FcPatternReference(font);
|
|
}
|
|
}
|
|
|
|
fontSet.steal(truncatedSet);
|
|
}
|
|
|
|
return fontSet.out();
|
|
}
|
|
|
|
nsReturnRef<FcFontSet>
|
|
gfxFcFontSet::SortFallbackFonts()
|
|
{
|
|
// Setting trim to FcTrue would provide a much smaller (~ 1/10) FcFontSet,
|
|
// but would take much longer due to comparing all the character sets.
|
|
//
|
|
// The references to fonts in this FcFontSet are almost free
|
|
// as they are pointers into mmaped cache files.
|
|
//
|
|
// GetFontPatternAt() will trim lazily if and as needed, which will also
|
|
// remove duplicates of preferred fonts.
|
|
FcResult result;
|
|
return nsReturnRef<FcFontSet>(FcFontSort(NULL, mSortPattern,
|
|
FcFalse, NULL, &result));
|
|
}
|
|
|
|
// GetFontAt relies on this setting up all patterns up to |i|.
|
|
FcPattern *
|
|
gfxFcFontSet::GetFontPatternAt(uint32_t i)
|
|
{
|
|
while (i >= mFonts.Length()) {
|
|
while (!mFcFontSet) {
|
|
if (mHaveFallbackFonts)
|
|
return nullptr;
|
|
|
|
mFcFontSet = SortFallbackFonts();
|
|
mHaveFallbackFonts = true;
|
|
mFcFontsTrimmed = 0;
|
|
// Loop to test that mFcFontSet is non-NULL.
|
|
}
|
|
|
|
while (mFcFontsTrimmed < mFcFontSet->nfont) {
|
|
FcPattern *font = mFcFontSet->fonts[mFcFontsTrimmed];
|
|
++mFcFontsTrimmed;
|
|
|
|
if (mFonts.Length() != 0) {
|
|
// See if the next font provides support for any extra
|
|
// characters. Most often the next font is not going to
|
|
// support more characters so check for a SubSet first before
|
|
// allocating a new CharSet with Union.
|
|
FcCharSet *supportedChars = mCharSet;
|
|
if (!supportedChars) {
|
|
FcPatternGetCharSet(mFonts[mFonts.Length() - 1].mPattern,
|
|
FC_CHARSET, 0, &supportedChars);
|
|
}
|
|
|
|
if (supportedChars) {
|
|
FcCharSet *newChars = NULL;
|
|
FcPatternGetCharSet(font, FC_CHARSET, 0, &newChars);
|
|
if (newChars) {
|
|
if (FcCharSetIsSubset(newChars, supportedChars))
|
|
continue;
|
|
|
|
mCharSet.own(FcCharSetUnion(supportedChars, newChars));
|
|
} else if (!mCharSet) {
|
|
mCharSet.own(FcCharSetCopy(supportedChars));
|
|
}
|
|
}
|
|
}
|
|
|
|
mFonts.AppendElement(font);
|
|
if (mFonts.Length() >= i)
|
|
break;
|
|
}
|
|
|
|
if (mFcFontsTrimmed == mFcFontSet->nfont) {
|
|
// finished with this font set
|
|
mFcFontSet.reset();
|
|
}
|
|
}
|
|
|
|
return mFonts[i].mPattern;
|
|
}
|
|
|
|
#ifdef MOZ_WIDGET_GTK
|
|
static void ApplyGdkScreenFontOptions(FcPattern *aPattern);
|
|
#endif
|
|
|
|
// Apply user settings and defaults to pattern in preparation for matching.
|
|
static void
|
|
PrepareSortPattern(FcPattern *aPattern, double aFallbackSize,
|
|
double aSizeAdjustFactor, bool aIsPrinterFont)
|
|
{
|
|
FcConfigSubstitute(NULL, 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_GFX_OPTIMIZE_MOBILE
|
|
cairo_font_options_t *options = cairo_font_options_create();
|
|
cairo_font_options_set_hint_style(options, CAIRO_HINT_STYLE_NONE);
|
|
cairo_ft_font_options_substitute(options, aPattern);
|
|
cairo_font_options_destroy(options);
|
|
#endif
|
|
#ifdef MOZ_WIDGET_GTK
|
|
ApplyGdkScreenFontOptions(aPattern);
|
|
#endif
|
|
}
|
|
|
|
// Protect against any fontconfig settings that may have incorrectly
|
|
// modified the pixelsize, and consider aSizeAdjustFactor.
|
|
double size = aFallbackSize;
|
|
if (FcPatternGetDouble(aPattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch
|
|
|| aSizeAdjustFactor != 1.0) {
|
|
FcPatternDel(aPattern, FC_PIXEL_SIZE);
|
|
FcPatternAddDouble(aPattern, FC_PIXEL_SIZE, size * aSizeAdjustFactor);
|
|
}
|
|
|
|
FcDefaultSubstitute(aPattern);
|
|
}
|
|
|
|
/**
|
|
** gfxPangoFontGroup
|
|
**/
|
|
|
|
struct FamilyCallbackData {
|
|
FamilyCallbackData(nsTArray<nsString> *aFcFamilyList,
|
|
gfxUserFontSet *aUserFontSet)
|
|
: mFcFamilyList(aFcFamilyList), mUserFontSet(aUserFontSet)
|
|
{
|
|
}
|
|
nsTArray<nsString> *mFcFamilyList;
|
|
const gfxUserFontSet *mUserFontSet;
|
|
};
|
|
|
|
static int
|
|
FFRECountHyphens (const nsAString &aFFREName)
|
|
{
|
|
int h = 0;
|
|
int32_t hyphen = 0;
|
|
while ((hyphen = aFFREName.FindChar('-', hyphen)) >= 0) {
|
|
++h;
|
|
++hyphen;
|
|
}
|
|
return h;
|
|
}
|
|
|
|
static bool
|
|
FamilyCallback (const nsAString& fontName, const nsACString& genericName,
|
|
bool aUseFontSet, void *closure)
|
|
{
|
|
FamilyCallbackData *data = static_cast<FamilyCallbackData*>(closure);
|
|
nsTArray<nsString> *list = data->mFcFamilyList;
|
|
|
|
// We ignore prefs that have three hypens since they are X style prefs.
|
|
if (genericName.Length() && FFRECountHyphens(fontName) >= 3)
|
|
return true;
|
|
|
|
if (!list->Contains(fontName)) {
|
|
// The family properties of FcPatterns for @font-face fonts have a
|
|
// namespace to identify them among system fonts. (see
|
|
// FONT_FACE_FAMILY_PREFIX.)
|
|
//
|
|
// Earlier versions of this code allowed the CSS family name to match
|
|
// either the @font-face family or the system font family, so both
|
|
// were added here. This was in accordance with earlier versions of
|
|
// the W3C specifications regarding @font-face.
|
|
//
|
|
// The current (2011-02-27) draft of CSS3 Fonts says
|
|
//
|
|
// (Section 4.2: Font family: the font-family descriptor):
|
|
// "If the font family name is the same as a font family available in
|
|
// a given user's environment, it effectively hides the underlying
|
|
// font for documents that use the stylesheet."
|
|
//
|
|
// (Section 5: Font matching algorithm)
|
|
// "... the user agent attempts to find the family name among fonts
|
|
// defined via @font-face rules and then among available system fonts,
|
|
// .... If a font family defined via @font-face rules contains only
|
|
// invalid font data, it should be considered as if a font was present
|
|
// but contained an empty character map; matching a platform font with
|
|
// the same name must not occur in this case."
|
|
//
|
|
// Therefore, for names present in the user font set, this code no
|
|
// longer includes the family name for matching against system fonts.
|
|
//
|
|
const gfxUserFontSet *userFontSet = data->mUserFontSet;
|
|
if (aUseFontSet && genericName.Length() == 0 &&
|
|
userFontSet && userFontSet->HasFamily(fontName)) {
|
|
nsAutoString userFontName =
|
|
NS_LITERAL_STRING(FONT_FACE_FAMILY_PREFIX) + fontName;
|
|
list->AppendElement(userFontName);
|
|
} else {
|
|
list->AppendElement(fontName);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
gfxPangoFontGroup::gfxPangoFontGroup (const nsAString& families,
|
|
const gfxFontStyle *aStyle,
|
|
gfxUserFontSet *aUserFontSet)
|
|
: gfxFontGroup(families, aStyle, aUserFontSet),
|
|
mPangoLanguage(GuessPangoLanguage(aStyle->language))
|
|
{
|
|
// This language is passed to the font for shaping.
|
|
// Shaping doesn't know about lang groups so make it a real language.
|
|
if (mPangoLanguage) {
|
|
mStyle.language = do_GetAtom(pango_language_to_string(mPangoLanguage));
|
|
}
|
|
|
|
// dummy entry, will be replaced when actually needed
|
|
mFonts.AppendElement(FamilyFace());
|
|
}
|
|
|
|
gfxPangoFontGroup::~gfxPangoFontGroup()
|
|
{
|
|
}
|
|
|
|
gfxFontGroup *
|
|
gfxPangoFontGroup::Copy(const gfxFontStyle *aStyle)
|
|
{
|
|
return new gfxPangoFontGroup(mFamilies, aStyle, mUserFontSet);
|
|
}
|
|
|
|
// An array of family names suitable for fontconfig
|
|
void
|
|
gfxPangoFontGroup::GetFcFamilies(nsTArray<nsString> *aFcFamilyList,
|
|
nsIAtom *aLanguage)
|
|
{
|
|
FamilyCallbackData data(aFcFamilyList, mUserFontSet);
|
|
// Leave non-existing fonts in the list so that fontconfig can get the
|
|
// best match.
|
|
ForEachFontInternal(mFamilies, aLanguage, true, false, true,
|
|
FamilyCallback, &data);
|
|
}
|
|
|
|
gfxFcFont *
|
|
gfxPangoFontGroup::GetBaseFont()
|
|
{
|
|
if (mFonts[0].Font() == nullptr) {
|
|
gfxFont* font = GetBaseFontSet()->GetFontAt(0, GetStyle());
|
|
mFonts[0] = FamilyFace(nullptr, font);
|
|
}
|
|
|
|
return static_cast<gfxFcFont*>(mFonts[0].Font());
|
|
}
|
|
|
|
gfxFont *
|
|
gfxPangoFontGroup::GetFontAt(int32_t i)
|
|
{
|
|
// If it turns out to be hard for all clients that cache font
|
|
// groups to call UpdateFontList at appropriate times, we could
|
|
// instead consider just calling UpdateFontList from someplace
|
|
// more central (such as here).
|
|
NS_ASSERTION(!mUserFontSet || mCurrGeneration == GetGeneration(),
|
|
"Whoever was caching this font group should have "
|
|
"called UpdateFontList on it");
|
|
|
|
NS_PRECONDITION(i == 0, "Only have one font");
|
|
|
|
return GetBaseFont();
|
|
}
|
|
|
|
void
|
|
gfxPangoFontGroup::UpdateFontList()
|
|
{
|
|
if (!mUserFontSet)
|
|
return;
|
|
|
|
uint64_t newGeneration = mUserFontSet->GetGeneration();
|
|
if (newGeneration == mCurrGeneration)
|
|
return;
|
|
|
|
mFonts[0] = FamilyFace();
|
|
mFontSets.Clear();
|
|
mCachedEllipsisTextRun = nullptr;
|
|
mUnderlineOffset = UNDERLINE_OFFSET_NOT_SET;
|
|
mCurrGeneration = newGeneration;
|
|
mSkipDrawing = false;
|
|
}
|
|
|
|
already_AddRefed<gfxFcFontSet>
|
|
gfxPangoFontGroup::MakeFontSet(PangoLanguage *aLang, gfxFloat aSizeAdjustFactor,
|
|
nsAutoRef<FcPattern> *aMatchPattern)
|
|
{
|
|
const char *lang = pango_language_to_string(aLang);
|
|
|
|
nsRefPtr <nsIAtom> langGroup;
|
|
if (aLang != mPangoLanguage) {
|
|
// Set up langGroup for Mozilla's font prefs.
|
|
langGroup = do_GetAtom(lang);
|
|
}
|
|
|
|
nsAutoTArray<nsString, 20> fcFamilyList;
|
|
GetFcFamilies(&fcFamilyList,
|
|
langGroup ? langGroup.get() : mStyle.language.get());
|
|
|
|
// To consider: A fontset cache here could be helpful.
|
|
|
|
// Get a pattern suitable for matching.
|
|
nsAutoRef<FcPattern> pattern
|
|
(gfxFontconfigUtils::NewPattern(fcFamilyList, mStyle, lang));
|
|
|
|
PrepareSortPattern(pattern, mStyle.size, aSizeAdjustFactor, mStyle.printerFont);
|
|
|
|
nsRefPtr<gfxFcFontSet> fontset =
|
|
new gfxFcFontSet(pattern, mUserFontSet);
|
|
|
|
mSkipDrawing = fontset->WaitingForUserFont();
|
|
|
|
if (aMatchPattern)
|
|
aMatchPattern->steal(pattern);
|
|
|
|
return fontset.forget();
|
|
}
|
|
|
|
gfxPangoFontGroup::
|
|
FontSetByLangEntry::FontSetByLangEntry(PangoLanguage *aLang,
|
|
gfxFcFontSet *aFontSet)
|
|
: mLang(aLang), mFontSet(aFontSet)
|
|
{
|
|
}
|
|
|
|
gfxFcFontSet *
|
|
gfxPangoFontGroup::GetFontSet(PangoLanguage *aLang)
|
|
{
|
|
GetBaseFontSet(); // sets mSizeAdjustFactor and mFontSets[0]
|
|
|
|
if (!aLang)
|
|
return mFontSets[0].mFontSet;
|
|
|
|
for (uint32_t i = 0; i < mFontSets.Length(); ++i) {
|
|
if (mFontSets[i].mLang == aLang)
|
|
return mFontSets[i].mFontSet;
|
|
}
|
|
|
|
nsRefPtr<gfxFcFontSet> fontSet =
|
|
MakeFontSet(aLang, mSizeAdjustFactor);
|
|
mFontSets.AppendElement(FontSetByLangEntry(aLang, fontSet));
|
|
|
|
return fontSet;
|
|
}
|
|
|
|
already_AddRefed<gfxFont>
|
|
gfxPangoFontGroup::FindFontForChar(uint32_t aCh, uint32_t aPrevCh,
|
|
int32_t aRunScript,
|
|
gfxFont *aPrevMatchedFont,
|
|
uint8_t *aMatchType)
|
|
{
|
|
if (aPrevMatchedFont) {
|
|
// Don't switch fonts for control characters, regardless of
|
|
// whether they are present in the current font, as they won't
|
|
// actually be rendered (see bug 716229)
|
|
uint8_t category = GetGeneralCategory(aCh);
|
|
if (category == HB_UNICODE_GENERAL_CATEGORY_CONTROL) {
|
|
return nsRefPtr<gfxFont>(aPrevMatchedFont).forget();
|
|
}
|
|
|
|
// if this character is a join-control or the previous is a join-causer,
|
|
// use the same font as the previous range if we can
|
|
if (gfxFontUtils::IsJoinControl(aCh) ||
|
|
gfxFontUtils::IsJoinCauser(aPrevCh)) {
|
|
if (aPrevMatchedFont->HasCharacter(aCh)) {
|
|
return nsRefPtr<gfxFont>(aPrevMatchedFont).forget();
|
|
}
|
|
}
|
|
}
|
|
|
|
// if this character is a variation selector,
|
|
// use the previous font regardless of whether it supports VS or not.
|
|
// otherwise the text run will be divided.
|
|
if (gfxFontUtils::IsVarSelector(aCh)) {
|
|
if (aPrevMatchedFont) {
|
|
return nsRefPtr<gfxFont>(aPrevMatchedFont).forget();
|
|
}
|
|
// VS alone. it's meaningless to search different fonts
|
|
return nullptr;
|
|
}
|
|
|
|
// The real fonts that fontconfig provides for generic/fallback families
|
|
// depend on the language used, so a different FontSet is used for each
|
|
// language (except for the variation below).
|
|
//
|
|
// With most fontconfig configurations any real family names prior to a
|
|
// fontconfig generic with corresponding fonts installed will still lead
|
|
// to the same leading fonts in each FontSet.
|
|
//
|
|
// There is an inefficiency here therefore because the same base FontSet
|
|
// could often be used if these real families support the character.
|
|
// However, with fontconfig aliases, it is difficult to distinguish
|
|
// where exactly alias fonts end and generic/fallback fonts begin.
|
|
//
|
|
// The variation from pure language-based matching used here is that the
|
|
// same primary/base font is always used irrespective of the language.
|
|
// This provides that SCRIPT_COMMON characters are consistently rendered
|
|
// with the same font (bug 339513 and bug 416725). This is particularly
|
|
// important with the word cache as script can't be reliably determined
|
|
// from surrounding words. It also often avoids the unnecessary extra
|
|
// FontSet efficiency mentioned above.
|
|
//
|
|
// However, in two situations, the base font is not checked before the
|
|
// language-specific FontSet.
|
|
//
|
|
// 1. When we don't have a language to make a good choice for
|
|
// the base font.
|
|
//
|
|
// 2. For system fonts, use the default Pango behavior to give
|
|
// consistency with other apps. This is relevant when un-localized
|
|
// builds are run in non-Latin locales. This special-case probably
|
|
// wouldn't be necessary but for bug 91190.
|
|
|
|
gfxFcFontSet *fontSet = GetBaseFontSet();
|
|
uint32_t nextFont = 0;
|
|
FcPattern *basePattern = NULL;
|
|
if (!mStyle.systemFont && mPangoLanguage) {
|
|
basePattern = fontSet->GetFontPatternAt(0);
|
|
if (HasChar(basePattern, aCh)) {
|
|
*aMatchType = gfxTextRange::kFontGroup;
|
|
return nsRefPtr<gfxFont>(GetBaseFont()).forget();
|
|
}
|
|
|
|
nextFont = 1;
|
|
}
|
|
|
|
// Pango, GLib, and Thebes (but not harfbuzz!) all happen to use the same
|
|
// script codes, so we can just cast the value here.
|
|
const PangoScript script = static_cast<PangoScript>(aRunScript);
|
|
// Might be nice to call pango_language_includes_script only once for the
|
|
// run rather than for each character.
|
|
PangoLanguage *scriptLang;
|
|
if ((!basePattern ||
|
|
!pango_language_includes_script(mPangoLanguage, script)) &&
|
|
(scriptLang = pango_script_get_sample_language(script))) {
|
|
fontSet = GetFontSet(scriptLang);
|
|
nextFont = 0;
|
|
}
|
|
|
|
for (uint32_t i = nextFont;
|
|
FcPattern *pattern = fontSet->GetFontPatternAt(i);
|
|
++i) {
|
|
if (pattern == basePattern) {
|
|
continue; // already checked basePattern
|
|
}
|
|
|
|
if (HasChar(pattern, aCh)) {
|
|
*aMatchType = gfxTextRange::kFontGroup;
|
|
return nsRefPtr<gfxFont>(fontSet->GetFontAt(i, GetStyle())).forget();
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
// Sanity-check: spot-check a few constants to confirm that Thebes and
|
|
// Pango script codes really do match
|
|
#define CHECK_SCRIPT_CODE(script) \
|
|
PR_STATIC_ASSERT(int32_t(MOZ_SCRIPT_##script) == \
|
|
int32_t(PANGO_SCRIPT_##script))
|
|
|
|
CHECK_SCRIPT_CODE(COMMON);
|
|
CHECK_SCRIPT_CODE(INHERITED);
|
|
CHECK_SCRIPT_CODE(ARABIC);
|
|
CHECK_SCRIPT_CODE(LATIN);
|
|
CHECK_SCRIPT_CODE(UNKNOWN);
|
|
CHECK_SCRIPT_CODE(NKO);
|
|
|
|
/**
|
|
** gfxFcFont
|
|
**/
|
|
|
|
cairo_user_data_key_t gfxFcFont::sGfxFontKey;
|
|
|
|
gfxFcFont::gfxFcFont(cairo_scaled_font_t *aCairoFont,
|
|
gfxFcFontEntry *aFontEntry,
|
|
const gfxFontStyle *aFontStyle)
|
|
: gfxFT2FontBase(aCairoFont, aFontEntry, aFontStyle)
|
|
{
|
|
cairo_scaled_font_set_user_data(mScaledFont, &sGfxFontKey, this, NULL);
|
|
}
|
|
|
|
gfxFcFont::~gfxFcFont()
|
|
{
|
|
cairo_scaled_font_set_user_data(mScaledFont, &sGfxFontKey, NULL, NULL);
|
|
}
|
|
|
|
bool
|
|
gfxFcFont::ShapeText(gfxContext *aContext,
|
|
const PRUnichar *aText,
|
|
uint32_t aOffset,
|
|
uint32_t aLength,
|
|
int32_t aScript,
|
|
gfxShapedText *aShapedText,
|
|
bool aPreferPlatformShaping)
|
|
{
|
|
bool ok = false;
|
|
|
|
if (FontCanSupportGraphite()) {
|
|
if (gfxPlatform::GetPlatform()->UseGraphiteShaping()) {
|
|
if (!mGraphiteShaper) {
|
|
mGraphiteShaper = new gfxGraphiteShaper(this);
|
|
}
|
|
ok = mGraphiteShaper->ShapeText(aContext, aText, aOffset, aLength,
|
|
aScript, aShapedText);
|
|
}
|
|
}
|
|
|
|
if (!ok) {
|
|
if (!mHarfBuzzShaper) {
|
|
gfxFT2LockedFace face(this);
|
|
mHarfBuzzShaper = new gfxHarfBuzzShaper(this);
|
|
// Used by gfxHarfBuzzShaper, currently only for kerning
|
|
mFUnitsConvFactor = face.XScale();
|
|
}
|
|
ok = mHarfBuzzShaper->ShapeText(aContext, aText, aOffset, aLength,
|
|
aScript, aShapedText);
|
|
}
|
|
|
|
NS_WARN_IF_FALSE(ok, "shaper failed, expect scrambled or missing text");
|
|
|
|
PostShapingFixup(aContext, aText, aOffset, aLength, aShapedText);
|
|
|
|
return ok;
|
|
}
|
|
|
|
/* static */ void
|
|
gfxPangoFontGroup::Shutdown()
|
|
{
|
|
// Resetting gFTLibrary in case this is wanted again after a
|
|
// cairo_debug_reset_static_data.
|
|
gFTLibrary = NULL;
|
|
}
|
|
|
|
/* static */ gfxFontEntry *
|
|
gfxPangoFontGroup::NewFontEntry(const gfxProxyFontEntry &aProxyEntry,
|
|
const nsAString& aFullname)
|
|
{
|
|
gfxFontconfigUtils *utils = gfxFontconfigUtils::GetFontconfigUtils();
|
|
if (!utils)
|
|
return nullptr;
|
|
|
|
// The font face name from @font-face { src: local() } is not well
|
|
// defined.
|
|
//
|
|
// On MS Windows, this name gets compared with
|
|
// ENUMLOGFONTEXW::elfFullName, which for OpenType fonts seems to be the
|
|
// full font name from the name table. For CFF OpenType fonts this is the
|
|
// same as the PostScript name, but for TrueType fonts it is usually
|
|
// different.
|
|
//
|
|
// On Mac, the font face name is compared with the PostScript name, even
|
|
// for TrueType fonts.
|
|
//
|
|
// Fontconfig only records the full font names, so the behavior here
|
|
// follows that on MS Windows. However, to provide the possibility
|
|
// of aliases to compensate for variations, the font face name is passed
|
|
// through FcConfigSubstitute.
|
|
|
|
nsAutoRef<FcPattern> pattern(FcPatternCreate());
|
|
if (!pattern)
|
|
return nullptr;
|
|
|
|
NS_ConvertUTF16toUTF8 fullname(aFullname);
|
|
FcPatternAddString(pattern, FC_FULLNAME,
|
|
gfxFontconfigUtils::ToFcChar8(fullname));
|
|
FcConfigSubstitute(NULL, pattern, FcMatchPattern);
|
|
|
|
FcChar8 *name;
|
|
for (int v = 0;
|
|
FcPatternGetString(pattern, FC_FULLNAME, v, &name) == FcResultMatch;
|
|
++v) {
|
|
const nsTArray< nsCountedRef<FcPattern> >& fonts =
|
|
utils->GetFontsForFullname(name);
|
|
|
|
if (fonts.Length() != 0)
|
|
return new gfxLocalFcFontEntry(aProxyEntry, fonts);
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
/* static */ FT_Library
|
|
gfxPangoFontGroup::GetFTLibrary()
|
|
{
|
|
if (!gFTLibrary) {
|
|
// 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's FT_Library can be obtained from any cairo_scaled_font. The
|
|
// font properties requested here are chosen to get an FT_Face that is
|
|
// likely to be also used elsewhere.
|
|
gfxFontStyle style;
|
|
nsRefPtr<gfxPangoFontGroup> fontGroup =
|
|
new gfxPangoFontGroup(NS_LITERAL_STRING("sans-serif"),
|
|
&style, nullptr);
|
|
|
|
gfxFcFont *font = fontGroup->GetBaseFont();
|
|
if (!font)
|
|
return NULL;
|
|
|
|
gfxFT2LockedFace face(font);
|
|
if (!face.get())
|
|
return NULL;
|
|
|
|
gFTLibrary = face.get()->glyph->library;
|
|
}
|
|
|
|
return gFTLibrary;
|
|
}
|
|
|
|
/* static */ gfxFontEntry *
|
|
gfxPangoFontGroup::NewFontEntry(const gfxProxyFontEntry &aProxyEntry,
|
|
const uint8_t *aFontData, uint32_t aLength)
|
|
{
|
|
// Ownership of aFontData is passed in here, and transferred to the
|
|
// new fontEntry, which will release it when no longer needed.
|
|
|
|
// Using face_index = 0 for the first face in the font, as we have no
|
|
// other information. FT_New_Memory_Face checks for a NULL FT_Library.
|
|
FT_Face face;
|
|
FT_Error error =
|
|
FT_New_Memory_Face(GetFTLibrary(), aFontData, aLength, 0, &face);
|
|
if (error != 0) {
|
|
NS_Free((void*)aFontData);
|
|
return nullptr;
|
|
}
|
|
|
|
return new gfxDownloadedFcFontEntry(aProxyEntry, aFontData, face);
|
|
}
|
|
|
|
|
|
static double
|
|
GetPixelSize(FcPattern *aPattern)
|
|
{
|
|
double size;
|
|
if (FcPatternGetDouble(aPattern,
|
|
FC_PIXEL_SIZE, 0, &size) == FcResultMatch)
|
|
return size;
|
|
|
|
NS_NOTREACHED("No size on pattern");
|
|
return 0.0;
|
|
}
|
|
|
|
/**
|
|
* The following gfxFcFonts are accessed from the cairo_scaled_font or created
|
|
* from the FcPattern, not from the gfxFontCache hash table. The gfxFontCache
|
|
* hash table is keyed by desired family and style, whereas here we only know
|
|
* actual family and style. There may be more than one of these fonts with
|
|
* the same family and style, but different PangoFont and actual font face.
|
|
*
|
|
* The point of this is to record the exact font face for gfxTextRun glyph
|
|
* indices. The style of this font does not necessarily represent the exact
|
|
* gfxFontStyle used to build the text run. Notably, the language is not
|
|
* recorded.
|
|
*/
|
|
|
|
/* static */
|
|
already_AddRefed<gfxFcFont>
|
|
gfxFcFont::GetOrMakeFont(FcPattern *aRequestedPattern, FcPattern *aFontPattern,
|
|
const gfxFontStyle *aFontStyle)
|
|
{
|
|
nsAutoRef<FcPattern> renderPattern
|
|
(FcFontRenderPrepare(NULL, aRequestedPattern, aFontPattern));
|
|
cairo_font_face_t *face =
|
|
cairo_ft_font_face_create_for_pattern(renderPattern);
|
|
|
|
// Reuse an existing font entry if available.
|
|
nsRefPtr<gfxFcFontEntry> fe = gfxFcFontEntry::LookupFontEntry(face);
|
|
if (!fe) {
|
|
gfxDownloadedFcFontEntry *downloadedFontEntry =
|
|
GetDownloadedFontEntry(aFontPattern);
|
|
if (downloadedFontEntry) {
|
|
// Web font
|
|
fe = downloadedFontEntry;
|
|
if (cairo_font_face_status(face) == CAIRO_STATUS_SUCCESS) {
|
|
// cairo_font_face_t is using the web font data.
|
|
// Hold a reference to the font entry to keep the font face
|
|
// data.
|
|
if (!downloadedFontEntry->SetCairoFace(face)) {
|
|
// OOM. Let cairo pick a fallback font
|
|
cairo_font_face_destroy(face);
|
|
face = cairo_ft_font_face_create_for_pattern(aRequestedPattern);
|
|
fe = gfxFcFontEntry::LookupFontEntry(face);
|
|
}
|
|
}
|
|
}
|
|
if (!fe) {
|
|
// Get a unique name for the font face from the file and id.
|
|
nsAutoString name;
|
|
FcChar8 *fc_file;
|
|
if (FcPatternGetString(renderPattern,
|
|
FC_FILE, 0, &fc_file) == FcResultMatch) {
|
|
int index;
|
|
if (FcPatternGetInteger(renderPattern,
|
|
FC_INDEX, 0, &index) != FcResultMatch) {
|
|
// cairo defaults to 0.
|
|
index = 0;
|
|
}
|
|
|
|
AppendUTF8toUTF16(gfxFontconfigUtils::ToCString(fc_file), name);
|
|
if (index != 0) {
|
|
name.AppendLiteral("/");
|
|
name.AppendInt(index);
|
|
}
|
|
}
|
|
|
|
fe = new gfxSystemFcFontEntry(face, aFontPattern, name);
|
|
}
|
|
}
|
|
|
|
gfxFontStyle style(*aFontStyle);
|
|
style.size = GetPixelSize(renderPattern);
|
|
style.style = gfxFontconfigUtils::GetThebesStyle(renderPattern);
|
|
style.weight = gfxFontconfigUtils::GetThebesWeight(renderPattern);
|
|
|
|
nsRefPtr<gfxFont> font = gfxFontCache::GetCache()->Lookup(fe, &style);
|
|
if (!font) {
|
|
// Note that a file/index pair (or FT_Face) and the gfxFontStyle are
|
|
// not necessarily enough to provide a key that will describe a unique
|
|
// font. cairoFont contains information from renderPattern, which is a
|
|
// fully resolved pattern from FcFontRenderPrepare.
|
|
// FcFontRenderPrepare takes the requested pattern and the face
|
|
// pattern as input and can modify elements of the resulting pattern
|
|
// that affect rendering but are not included in the gfxFontStyle.
|
|
cairo_scaled_font_t *cairoFont = CreateScaledFont(renderPattern, face);
|
|
font = new gfxFcFont(cairoFont, fe, &style);
|
|
gfxFontCache::GetCache()->AddNew(font);
|
|
cairo_scaled_font_destroy(cairoFont);
|
|
}
|
|
|
|
cairo_font_face_destroy(face);
|
|
|
|
nsRefPtr<gfxFcFont> retval(static_cast<gfxFcFont*>(font.get()));
|
|
return retval.forget();
|
|
}
|
|
|
|
gfxFcFontSet *
|
|
gfxPangoFontGroup::GetBaseFontSet()
|
|
{
|
|
if (mFontSets.Length() > 0)
|
|
return mFontSets[0].mFontSet;
|
|
|
|
mSizeAdjustFactor = 1.0; // will be adjusted below if necessary
|
|
nsAutoRef<FcPattern> pattern;
|
|
nsRefPtr<gfxFcFontSet> fontSet =
|
|
MakeFontSet(mPangoLanguage, mSizeAdjustFactor, &pattern);
|
|
|
|
double size = GetPixelSize(pattern);
|
|
if (size != 0.0 && mStyle.sizeAdjust != 0.0) {
|
|
gfxFcFont *font = fontSet->GetFontAt(0, GetStyle());
|
|
if (font) {
|
|
const gfxFont::Metrics& metrics = font->GetMetrics();
|
|
|
|
// 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) {
|
|
mSizeAdjustFactor =
|
|
mStyle.sizeAdjust * metrics.emHeight / metrics.xHeight;
|
|
|
|
size *= mSizeAdjustFactor;
|
|
FcPatternDel(pattern, FC_PIXEL_SIZE);
|
|
FcPatternAddDouble(pattern, FC_PIXEL_SIZE, size);
|
|
|
|
fontSet = new gfxFcFontSet(pattern, mUserFontSet);
|
|
}
|
|
}
|
|
}
|
|
|
|
PangoLanguage *pangoLang = mPangoLanguage;
|
|
FcChar8 *fcLang;
|
|
if (!pangoLang &&
|
|
FcPatternGetString(pattern, FC_LANG, 0, &fcLang) == FcResultMatch) {
|
|
pangoLang =
|
|
pango_language_from_string(gfxFontconfigUtils::ToCString(fcLang));
|
|
}
|
|
|
|
mFontSets.AppendElement(FontSetByLangEntry(pangoLang, fontSet));
|
|
|
|
return fontSet;
|
|
}
|
|
|
|
/**
|
|
** gfxTextRun
|
|
*
|
|
* A serious problem:
|
|
*
|
|
* -- We draw with a font that's hinted for the CTM, but we measure with a font
|
|
* hinted to the identity matrix, so our "bounding metrics" may not be accurate.
|
|
*
|
|
**/
|
|
|
|
// This will fetch an existing scaled_font if one exists.
|
|
static cairo_scaled_font_t *
|
|
CreateScaledFont(FcPattern *aPattern, cairo_font_face_t *aFace)
|
|
{
|
|
double size = GetPixelSize(aPattern);
|
|
|
|
cairo_matrix_t fontMatrix;
|
|
FcMatrix *fcMatrix;
|
|
if (FcPatternGetMatrix(aPattern, FC_MATRIX, 0, &fcMatrix) == FcResultMatch)
|
|
cairo_matrix_init(&fontMatrix, fcMatrix->xx, -fcMatrix->yx, -fcMatrix->xy, fcMatrix->yy, 0, 0);
|
|
else
|
|
cairo_matrix_init_identity(&fontMatrix);
|
|
cairo_matrix_scale(&fontMatrix, size, size);
|
|
|
|
FcBool printing;
|
|
if (FcPatternGetBool(aPattern, PRINTING_FC_PROPERTY, 0, &printing) != FcResultMatch) {
|
|
printing = FcFalse;
|
|
}
|
|
|
|
// The cairo_scaled_font is created with a unit ctm so that metrics and
|
|
// positions are in user space, but this means that hinting effects will
|
|
// not be estimated accurately for non-unit transformations.
|
|
cairo_matrix_t identityMatrix;
|
|
cairo_matrix_init_identity(&identityMatrix);
|
|
|
|
// 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.
|
|
cairo_font_options_t *fontOptions = cairo_font_options_create();
|
|
|
|
// 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.
|
|
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
|
|
cairo_font_options_set_hint_metrics(fontOptions, CAIRO_HINT_METRICS_OFF);
|
|
#else
|
|
if (printing) {
|
|
cairo_font_options_set_hint_metrics(fontOptions, CAIRO_HINT_METRICS_OFF);
|
|
} else {
|
|
cairo_font_options_set_hint_metrics(fontOptions, CAIRO_HINT_METRICS_ON);
|
|
}
|
|
#endif
|
|
|
|
// 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;
|
|
#ifndef MOZ_GFX_OPTIMIZE_MOBILE
|
|
if (FcPatternGetBool(aPattern, FC_HINTING, 0, &hinting) != FcResultMatch) {
|
|
hinting = FcTrue;
|
|
}
|
|
#endif
|
|
cairo_hint_style_t hint_style;
|
|
if (printing || !hinting) {
|
|
hint_style = CAIRO_HINT_STYLE_NONE;
|
|
} else {
|
|
#ifdef FC_HINT_STYLE // FC_HINT_STYLE is available from fontconfig 2.2.91.
|
|
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;
|
|
}
|
|
#else // no FC_HINT_STYLE
|
|
hint_style = CAIRO_HINT_STYLE_FULL;
|
|
#endif
|
|
}
|
|
cairo_font_options_set_hint_style(fontOptions, 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(fontOptions, 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(fontOptions, antialias);
|
|
|
|
cairo_scaled_font_t *scaledFont =
|
|
cairo_scaled_font_create(aFace, &fontMatrix, &identityMatrix,
|
|
fontOptions);
|
|
|
|
cairo_font_options_destroy(fontOptions);
|
|
|
|
NS_ASSERTION(cairo_scaled_font_status(scaledFont) == CAIRO_STATUS_SUCCESS,
|
|
"Failed to create scaled font");
|
|
return scaledFont;
|
|
}
|
|
|
|
/* static */
|
|
PangoLanguage *
|
|
GuessPangoLanguage(nsIAtom *aLanguage)
|
|
{
|
|
if (!aLanguage)
|
|
return NULL;
|
|
|
|
// Pango and fontconfig won't understand mozilla's internal langGroups, so
|
|
// find a real language.
|
|
nsAutoCString lang;
|
|
gfxFontconfigUtils::GetSampleLangForGroup(aLanguage, &lang);
|
|
if (lang.IsEmpty())
|
|
return NULL;
|
|
|
|
return pango_language_from_string(lang.get());
|
|
}
|
|
|
|
#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
|