зеркало из https://github.com/mozilla/gecko-dev.git
668 строки
23 KiB
C++
668 строки
23 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Foundation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#if defined(MOZ_WIDGET_GTK2)
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#include "gfxPlatformGtk.h"
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#define gfxToolkitPlatform gfxPlatformGtk
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#elif defined(MOZ_WIDGET_QT)
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#include <qfontinfo.h>
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#include "gfxQtPlatform.h"
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#define gfxToolkitPlatform gfxQtPlatform
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#elif defined(XP_WIN)
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#include "gfxWindowsPlatform.h"
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#define gfxToolkitPlatform gfxWindowsPlatform
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#elif defined(ANDROID)
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#include "gfxAndroidPlatform.h"
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#define gfxToolkitPlatform gfxAndroidPlatform
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#endif
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#include "gfxTypes.h"
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#include "gfxFT2Fonts.h"
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#include "gfxFT2FontBase.h"
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#include "gfxFT2Utils.h"
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#include "gfxFT2FontList.h"
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#include <locale.h>
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#include "gfxHarfBuzzShaper.h"
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#ifdef MOZ_GRAPHITE
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#include "gfxGraphiteShaper.h"
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#endif
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#include "gfxUnicodeProperties.h"
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#include "gfxAtoms.h"
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#include "nsTArray.h"
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#include "nsUnicodeRange.h"
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#include "nsCRT.h"
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#include "prlog.h"
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#include "prinit.h"
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#include "mozilla/Preferences.h"
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static PRLogModuleInfo *gFontLog = PR_NewLogModule("ft2fonts");
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// rounding and truncation functions for a Freetype floating point number
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// (FT26Dot6) stored in a 32bit integer with high 26 bits for the integer
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// part and low 6 bits for the fractional part.
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#define MOZ_FT_ROUND(x) (((x) + 32) & ~63) // 63 = 2^6 - 1
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#define MOZ_FT_TRUNC(x) ((x) >> 6)
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#define CONVERT_DESIGN_UNITS_TO_PIXELS(v, s) \
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MOZ_FT_TRUNC(MOZ_FT_ROUND(FT_MulFix((v) , (s))))
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#ifndef ANDROID // not needed on Android, we use the generic gfxFontGroup
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/**
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* gfxFT2FontGroup
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*/
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bool
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gfxFT2FontGroup::FontCallback(const nsAString& fontName,
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const nsACString& genericName,
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bool aUseFontSet,
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void *closure)
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{
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nsTArray<nsString> *sa = static_cast<nsTArray<nsString>*>(closure);
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if (!fontName.IsEmpty() && !sa->Contains(fontName)) {
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sa->AppendElement(fontName);
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#ifdef DEBUG_pavlov
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printf(" - %s\n", NS_ConvertUTF16toUTF8(fontName).get());
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#endif
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}
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return true;
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}
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gfxFT2FontGroup::gfxFT2FontGroup(const nsAString& families,
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const gfxFontStyle *aStyle,
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gfxUserFontSet *aUserFontSet)
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: gfxFontGroup(families, aStyle, aUserFontSet)
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{
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#ifdef DEBUG_pavlov
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printf("Looking for %s\n", NS_ConvertUTF16toUTF8(families).get());
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#endif
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nsTArray<nsString> familyArray;
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ForEachFont(FontCallback, &familyArray);
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if (familyArray.Length() == 0) {
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nsAutoString prefFamilies;
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gfxToolkitPlatform::GetPlatform()->GetPrefFonts(aStyle->language, prefFamilies, nsnull);
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if (!prefFamilies.IsEmpty()) {
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ForEachFont(prefFamilies, aStyle->language, FontCallback, &familyArray);
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}
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}
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if (familyArray.Length() == 0) {
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#if defined(MOZ_WIDGET_QT) /* FIXME DFB */
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printf("failde to find a font. sadface\n");
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// We want to get rid of this entirely at some point, but first we need real lists of fonts.
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QFont defaultFont;
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QFontInfo fi (defaultFont);
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familyArray.AppendElement(nsDependentString(static_cast<const PRUnichar *>(fi.family().utf16())));
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#elif defined(MOZ_WIDGET_GTK2)
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FcResult result;
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FcChar8 *family = nsnull;
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FcPattern* pat = FcPatternCreate();
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FcPattern *match = FcFontMatch(nsnull, pat, &result);
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if (match)
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FcPatternGetString(match, FC_FAMILY, 0, &family);
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if (family)
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familyArray.AppendElement(NS_ConvertUTF8toUTF16((char*)family));
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#elif defined(XP_WIN)
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HGDIOBJ hGDI = ::GetStockObject(SYSTEM_FONT);
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LOGFONTW logFont;
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if (hGDI && ::GetObjectW(hGDI, sizeof(logFont), &logFont))
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familyArray.AppendElement(nsDependentString(logFont.lfFaceName));
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#elif defined(ANDROID)
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familyArray.AppendElement(NS_LITERAL_STRING("Droid Sans"));
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#else
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#error "Platform not supported"
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#endif
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}
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for (PRUint32 i = 0; i < familyArray.Length(); i++) {
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nsRefPtr<gfxFT2Font> font = gfxFT2Font::GetOrMakeFont(familyArray[i], &mStyle);
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if (font) {
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mFonts.AppendElement(font);
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}
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}
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NS_ASSERTION(mFonts.Length() > 0, "We need at least one font in a fontgroup");
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}
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gfxFT2FontGroup::~gfxFT2FontGroup()
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{
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}
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gfxFontGroup *
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gfxFT2FontGroup::Copy(const gfxFontStyle *aStyle)
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{
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return new gfxFT2FontGroup(mFamilies, aStyle, nsnull);
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}
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// Helper function to return the leading UTF-8 character in a char pointer
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// as 32bit number. Also sets the length of the current character (i.e. the
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// offset to the next one) in the second argument
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PRUint32 getUTF8CharAndNext(const PRUint8 *aString, PRUint8 *aLength)
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{
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*aLength = 1;
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if (aString[0] < 0x80) { // normal 7bit ASCII char
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return aString[0];
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}
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if ((aString[0] >> 5) == 6) { // two leading ones -> two bytes
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*aLength = 2;
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return ((aString[0] & 0x1F) << 6) + (aString[1] & 0x3F);
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}
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if ((aString[0] >> 4) == 14) { // three leading ones -> three bytes
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*aLength = 3;
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return ((aString[0] & 0x0F) << 12) + ((aString[1] & 0x3F) << 6) +
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(aString[2] & 0x3F);
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}
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if ((aString[0] >> 4) == 15) { // four leading ones -> four bytes
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*aLength = 4;
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return ((aString[0] & 0x07) << 18) + ((aString[1] & 0x3F) << 12) +
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((aString[2] & 0x3F) << 6) + (aString[3] & 0x3F);
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}
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return aString[0];
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}
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static bool
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AddFontNameToArray(const nsAString& aName,
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const nsACString& aGenericName,
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bool aUseFontSet,
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void *aClosure)
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{
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if (!aName.IsEmpty()) {
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nsTArray<nsString> *list = static_cast<nsTArray<nsString> *>(aClosure);
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if (list->IndexOf(aName) == list->NoIndex)
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list->AppendElement(aName);
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}
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return true;
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}
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void
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gfxFT2FontGroup::FamilyListToArrayList(const nsString& aFamilies,
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nsIAtom *aLangGroup,
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nsTArray<nsRefPtr<gfxFontEntry> > *aFontEntryList)
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{
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nsAutoTArray<nsString, 15> fonts;
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ForEachFont(aFamilies, aLangGroup, AddFontNameToArray, &fonts);
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PRUint32 len = fonts.Length();
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for (PRUint32 i = 0; i < len; ++i) {
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const nsString& str = fonts[i];
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nsRefPtr<gfxFontEntry> fe = (gfxToolkitPlatform::GetPlatform()->FindFontEntry(str, mStyle));
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aFontEntryList->AppendElement(fe);
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}
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}
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void gfxFT2FontGroup::GetPrefFonts(nsIAtom *aLangGroup, nsTArray<nsRefPtr<gfxFontEntry> >& aFontEntryList)
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{
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NS_ASSERTION(aLangGroup, "aLangGroup is null");
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gfxToolkitPlatform *platform = gfxToolkitPlatform::GetPlatform();
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nsAutoTArray<nsRefPtr<gfxFontEntry>, 5> fonts;
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nsCAutoString key;
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aLangGroup->ToUTF8String(key);
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key.Append("-");
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key.AppendInt(GetStyle()->style);
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key.Append("-");
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key.AppendInt(GetStyle()->weight);
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if (!platform->GetPrefFontEntries(key, &fonts)) {
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nsString fontString;
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platform->GetPrefFonts(aLangGroup, fontString);
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if (fontString.IsEmpty())
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return;
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FamilyListToArrayList(fontString, aLangGroup, &fonts);
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platform->SetPrefFontEntries(key, fonts);
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}
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aFontEntryList.AppendElements(fonts);
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}
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static PRInt32 GetCJKLangGroupIndex(const char *aLangGroup) {
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PRInt32 i;
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for (i = 0; i < COUNT_OF_CJK_LANG_GROUP; i++) {
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if (!PL_strcasecmp(aLangGroup, sCJKLangGroup[i]))
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return i;
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}
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return -1;
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}
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// this function assigns to the array passed in.
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void gfxFT2FontGroup::GetCJKPrefFonts(nsTArray<nsRefPtr<gfxFontEntry> >& aFontEntryList) {
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gfxToolkitPlatform *platform = gfxToolkitPlatform::GetPlatform();
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nsCAutoString key("x-internal-cjk-");
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key.AppendInt(mStyle.style);
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key.Append("-");
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key.AppendInt(mStyle.weight);
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if (!platform->GetPrefFontEntries(key, &aFontEntryList)) {
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NS_ENSURE_TRUE(Preferences::GetRootBranch(), );
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// Add the CJK pref fonts from accept languages, the order should be same order
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nsAdoptingCString list = Preferences::GetLocalizedCString("intl.accept_languages");
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if (!list.IsEmpty()) {
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const char kComma = ',';
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const char *p, *p_end;
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list.BeginReading(p);
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list.EndReading(p_end);
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while (p < p_end) {
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while (nsCRT::IsAsciiSpace(*p)) {
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if (++p == p_end)
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break;
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}
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if (p == p_end)
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break;
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const char *start = p;
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while (++p != p_end && *p != kComma)
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/* nothing */ ;
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nsCAutoString lang(Substring(start, p));
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lang.CompressWhitespace(false, true);
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PRInt32 index = GetCJKLangGroupIndex(lang.get());
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if (index >= 0) {
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nsCOMPtr<nsIAtom> atom = do_GetAtom(sCJKLangGroup[index]);
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GetPrefFonts(atom, aFontEntryList);
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}
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p++;
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}
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}
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// Add the system locale
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#ifdef XP_WIN
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switch (::GetACP()) {
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case 932: GetPrefFonts(gfxAtoms::ja, aFontEntryList); break;
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case 936: GetPrefFonts(gfxAtoms::zh_cn, aFontEntryList); break;
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case 949: GetPrefFonts(gfxAtoms::ko, aFontEntryList); break;
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// XXX Don't we need to append gfxAtoms::zh_hk if the codepage is 950?
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case 950: GetPrefFonts(gfxAtoms::zh_tw, aFontEntryList); break;
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}
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#else
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const char *ctype = setlocale(LC_CTYPE, NULL);
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if (ctype) {
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if (!PL_strncasecmp(ctype, "ja", 2)) {
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GetPrefFonts(gfxAtoms::ja, aFontEntryList);
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} else if (!PL_strncasecmp(ctype, "zh_cn", 5)) {
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GetPrefFonts(gfxAtoms::zh_cn, aFontEntryList);
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} else if (!PL_strncasecmp(ctype, "zh_hk", 5)) {
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GetPrefFonts(gfxAtoms::zh_hk, aFontEntryList);
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} else if (!PL_strncasecmp(ctype, "zh_tw", 5)) {
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GetPrefFonts(gfxAtoms::zh_tw, aFontEntryList);
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} else if (!PL_strncasecmp(ctype, "ko", 2)) {
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GetPrefFonts(gfxAtoms::ko, aFontEntryList);
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}
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}
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#endif
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// last resort...
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GetPrefFonts(gfxAtoms::ja, aFontEntryList);
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GetPrefFonts(gfxAtoms::ko, aFontEntryList);
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GetPrefFonts(gfxAtoms::zh_cn, aFontEntryList);
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GetPrefFonts(gfxAtoms::zh_hk, aFontEntryList);
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GetPrefFonts(gfxAtoms::zh_tw, aFontEntryList);
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platform->SetPrefFontEntries(key, aFontEntryList);
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}
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}
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already_AddRefed<gfxFT2Font>
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gfxFT2FontGroup::WhichFontSupportsChar(const nsTArray<nsRefPtr<gfxFontEntry> >& aFontEntryList, PRUint32 aCh)
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{
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for (PRUint32 i = 0; i < aFontEntryList.Length(); i++) {
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gfxFontEntry *fe = aFontEntryList[i].get();
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if (fe->HasCharacter(aCh)) {
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nsRefPtr<gfxFT2Font> font =
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gfxFT2Font::GetOrMakeFont(static_cast<FontEntry*>(fe), &mStyle);
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return font.forget();
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}
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}
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return nsnull;
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}
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already_AddRefed<gfxFont>
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gfxFT2FontGroup::WhichPrefFontSupportsChar(PRUint32 aCh)
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{
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if (aCh > 0xFFFF)
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return nsnull;
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nsRefPtr<gfxFT2Font> selectedFont;
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// check out the style's language
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nsAutoTArray<nsRefPtr<gfxFontEntry>, 5> fonts;
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GetPrefFonts(mStyle.language, fonts);
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selectedFont = WhichFontSupportsChar(fonts, aCh);
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// otherwise search prefs
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if (!selectedFont) {
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PRUint32 unicodeRange = FindCharUnicodeRange(aCh);
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/* special case CJK */
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if (unicodeRange == kRangeSetCJK) {
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if (PR_LOG_TEST(gFontLog, PR_LOG_DEBUG)) {
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PR_LOG(gFontLog, PR_LOG_DEBUG, (" - Trying to find fonts for: CJK"));
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}
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nsAutoTArray<nsRefPtr<gfxFontEntry>, 15> fonts;
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GetCJKPrefFonts(fonts);
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selectedFont = WhichFontSupportsChar(fonts, aCh);
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} else {
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nsIAtom *langGroup = LangGroupFromUnicodeRange(unicodeRange);
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if (langGroup) {
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PR_LOG(gFontLog, PR_LOG_DEBUG, (" - Trying to find fonts for: %s", nsAtomCString(langGroup).get()));
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nsAutoTArray<nsRefPtr<gfxFontEntry>, 5> fonts;
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GetPrefFonts(langGroup, fonts);
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selectedFont = WhichFontSupportsChar(fonts, aCh);
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}
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}
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}
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if (selectedFont) {
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nsRefPtr<gfxFont> f = static_cast<gfxFont*>(selectedFont.get());
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return f.forget();
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}
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return nsnull;
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}
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already_AddRefed<gfxFont>
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gfxFT2FontGroup::WhichSystemFontSupportsChar(PRUint32 aCh)
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{
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#if defined(XP_WIN) || defined(ANDROID)
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FontEntry *fe = static_cast<FontEntry*>
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(gfxPlatformFontList::PlatformFontList()->FindFontForChar(aCh, GetFontAt(0)));
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if (fe) {
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nsRefPtr<gfxFT2Font> f = gfxFT2Font::GetOrMakeFont(fe, &mStyle);
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nsRefPtr<gfxFont> font = f.get();
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return font.forget();
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}
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#else
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nsRefPtr<gfxFont> selectedFont;
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nsRefPtr<gfxFont> refFont = GetFontAt(0);
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gfxToolkitPlatform *platform = gfxToolkitPlatform::GetPlatform();
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selectedFont = platform->FindFontForChar(aCh, refFont);
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if (selectedFont)
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return selectedFont.forget();
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#endif
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return nsnull;
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}
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#endif // !ANDROID
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/**
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* gfxFT2Font
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*/
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bool
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gfxFT2Font::InitTextRun(gfxContext *aContext,
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gfxTextRun *aTextRun,
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const PRUnichar *aString,
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PRUint32 aRunStart,
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PRUint32 aRunLength,
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PRInt32 aRunScript,
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bool aPreferPlatformShaping)
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{
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bool ok = false;
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#ifdef MOZ_GRAPHITE
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if (FontCanSupportGraphite()) {
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if (gfxPlatform::GetPlatform()->UseGraphiteShaping()) {
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if (!mGraphiteShaper) {
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mGraphiteShaper = new gfxGraphiteShaper(this);
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}
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ok = mGraphiteShaper->InitTextRun(aContext, aTextRun, aString,
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aRunStart, aRunLength,
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aRunScript);
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}
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}
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#endif
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if (!ok && gfxPlatform::GetPlatform()->UseHarfBuzzForScript(aRunScript)) {
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if (!mHarfBuzzShaper) {
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gfxFT2LockedFace face(this);
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mFUnitsConvFactor = face.XScale();
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mHarfBuzzShaper = new gfxHarfBuzzShaper(this);
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}
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ok = mHarfBuzzShaper->InitTextRun(aContext, aTextRun, aString,
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aRunStart, aRunLength, aRunScript);
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}
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if (!ok) {
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AddRange(aTextRun, aString, aRunStart, aRunLength);
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}
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|
|
|
aTextRun->AdjustAdvancesForSyntheticBold(aContext, aRunStart, aRunLength);
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
gfxFT2Font::AddRange(gfxTextRun *aTextRun, const PRUnichar *str, PRUint32 offset, PRUint32 len)
|
|
{
|
|
const PRUint32 appUnitsPerDevUnit = aTextRun->GetAppUnitsPerDevUnit();
|
|
// we'll pass this in/figure it out dynamically, but at this point there can be only one face.
|
|
gfxFT2LockedFace faceLock(this);
|
|
FT_Face face = faceLock.get();
|
|
|
|
gfxTextRun::CompressedGlyph g;
|
|
|
|
const gfxFT2Font::CachedGlyphData *cgd = nsnull, *cgdNext = nsnull;
|
|
|
|
FT_UInt spaceGlyph = GetSpaceGlyph();
|
|
|
|
for (PRUint32 i = 0; i < len; i++) {
|
|
PRUint32 ch = str[offset + i];
|
|
|
|
if (ch == 0) {
|
|
// treat this null byte as a missing glyph, don't create a glyph for it
|
|
aTextRun->SetMissingGlyph(offset + i, 0);
|
|
continue;
|
|
}
|
|
|
|
NS_ASSERTION(!gfxFontGroup::IsInvalidChar(ch), "Invalid char detected");
|
|
|
|
if (cgdNext) {
|
|
cgd = cgdNext;
|
|
cgdNext = nsnull;
|
|
} else {
|
|
cgd = GetGlyphDataForChar(ch);
|
|
}
|
|
|
|
FT_UInt gid = cgd->glyphIndex;
|
|
PRInt32 advance = 0;
|
|
|
|
if (gid == 0) {
|
|
advance = -1; // trigger the missing glyphs case below
|
|
} else {
|
|
// find next character and its glyph -- in case they exist
|
|
// and exist in the current font face -- to compute kerning
|
|
PRUint32 chNext = 0;
|
|
FT_UInt gidNext = 0;
|
|
FT_Pos lsbDeltaNext = 0;
|
|
|
|
if (FT_HAS_KERNING(face) && i + 1 < len) {
|
|
chNext = str[offset + i + 1];
|
|
if (chNext != 0) {
|
|
cgdNext = GetGlyphDataForChar(chNext);
|
|
gidNext = cgdNext->glyphIndex;
|
|
if (gidNext && gidNext != spaceGlyph)
|
|
lsbDeltaNext = cgdNext->lsbDelta;
|
|
}
|
|
}
|
|
|
|
advance = cgd->xAdvance;
|
|
|
|
// now add kerning to the current glyph's advance
|
|
if (chNext && gidNext) {
|
|
FT_Vector kerning; kerning.x = 0;
|
|
FT_Get_Kerning(face, gid, gidNext, FT_KERNING_DEFAULT, &kerning);
|
|
advance += kerning.x;
|
|
if (cgd->rsbDelta - lsbDeltaNext >= 32) {
|
|
advance -= 64;
|
|
} else if (cgd->rsbDelta - lsbDeltaNext < -32) {
|
|
advance += 64;
|
|
}
|
|
}
|
|
|
|
// convert 26.6 fixed point to app units
|
|
// round rather than truncate to nearest pixel
|
|
// because these advances are often scaled
|
|
advance = ((advance * appUnitsPerDevUnit + 32) >> 6);
|
|
}
|
|
#ifdef DEBUG_thebes_2
|
|
printf(" gid=%d, advance=%d (%s)\n", gid, advance,
|
|
NS_LossyConvertUTF16toASCII(font->GetName()).get());
|
|
#endif
|
|
|
|
if (advance >= 0 &&
|
|
gfxTextRun::CompressedGlyph::IsSimpleAdvance(advance) &&
|
|
gfxTextRun::CompressedGlyph::IsSimpleGlyphID(gid)) {
|
|
aTextRun->SetSimpleGlyph(offset + i, g.SetSimpleGlyph(advance, gid));
|
|
} else if (gid == 0) {
|
|
// gid = 0 only happens when the glyph is missing from the font
|
|
aTextRun->SetMissingGlyph(offset + i, ch);
|
|
} else {
|
|
gfxTextRun::DetailedGlyph details;
|
|
details.mGlyphID = gid;
|
|
NS_ASSERTION(details.mGlyphID == gid, "Seriously weird glyph ID detected!");
|
|
details.mAdvance = advance;
|
|
details.mXOffset = 0;
|
|
details.mYOffset = 0;
|
|
g.SetComplex(aTextRun->IsClusterStart(offset + i), true, 1);
|
|
aTextRun->SetGlyphs(offset + i, g, &details);
|
|
}
|
|
}
|
|
}
|
|
|
|
gfxFT2Font::gfxFT2Font(cairo_scaled_font_t *aCairoFont,
|
|
FT2FontEntry *aFontEntry,
|
|
const gfxFontStyle *aFontStyle,
|
|
bool aNeedsBold)
|
|
: gfxFT2FontBase(aCairoFont, aFontEntry, aFontStyle)
|
|
{
|
|
NS_ASSERTION(mFontEntry, "Unable to find font entry for font. Something is whack.");
|
|
mApplySyntheticBold = aNeedsBold;
|
|
mCharGlyphCache.Init(64);
|
|
}
|
|
|
|
gfxFT2Font::~gfxFT2Font()
|
|
{
|
|
}
|
|
|
|
cairo_font_face_t *
|
|
gfxFT2Font::CairoFontFace()
|
|
{
|
|
return GetFontEntry()->CairoFontFace();
|
|
}
|
|
|
|
/**
|
|
* Look up the font in the gfxFont cache. If we don't find it, create one.
|
|
* In either case, add a ref, append it to the aFonts array, and return it ---
|
|
* except for OOM in which case we do nothing and return null.
|
|
*/
|
|
already_AddRefed<gfxFT2Font>
|
|
gfxFT2Font::GetOrMakeFont(const nsAString& aName, const gfxFontStyle *aStyle,
|
|
bool aNeedsBold)
|
|
{
|
|
#ifdef ANDROID
|
|
FT2FontEntry *fe = static_cast<FT2FontEntry*>
|
|
(gfxPlatformFontList::PlatformFontList()->
|
|
FindFontForFamily(aName, aStyle, aNeedsBold));
|
|
#else
|
|
FT2FontEntry *fe = static_cast<FT2FontEntry*>
|
|
(gfxToolkitPlatform::GetPlatform()->FindFontEntry(aName, *aStyle));
|
|
#endif
|
|
if (!fe) {
|
|
NS_WARNING("Failed to find font entry for font!");
|
|
return nsnull;
|
|
}
|
|
|
|
nsRefPtr<gfxFT2Font> font = GetOrMakeFont(fe, aStyle, aNeedsBold);
|
|
return font.forget();
|
|
}
|
|
|
|
already_AddRefed<gfxFT2Font>
|
|
gfxFT2Font::GetOrMakeFont(FT2FontEntry *aFontEntry, const gfxFontStyle *aStyle,
|
|
bool aNeedsBold)
|
|
{
|
|
nsRefPtr<gfxFont> font = gfxFontCache::GetCache()->Lookup(aFontEntry, aStyle);
|
|
if (!font) {
|
|
cairo_scaled_font_t *scaledFont = aFontEntry->CreateScaledFont(aStyle);
|
|
font = new gfxFT2Font(scaledFont, aFontEntry, aStyle, aNeedsBold);
|
|
cairo_scaled_font_destroy(scaledFont);
|
|
if (!font)
|
|
return nsnull;
|
|
gfxFontCache::GetCache()->AddNew(font);
|
|
}
|
|
gfxFont *f = nsnull;
|
|
font.swap(f);
|
|
return static_cast<gfxFT2Font *>(f);
|
|
}
|
|
|
|
void
|
|
gfxFT2Font::FillGlyphDataForChar(PRUint32 ch, CachedGlyphData *gd)
|
|
{
|
|
gfxFT2LockedFace faceLock(this);
|
|
FT_Face face = faceLock.get();
|
|
|
|
FT_UInt gid = FT_Get_Char_Index(face, ch);
|
|
|
|
if (gid == 0) {
|
|
// this font doesn't support this char!
|
|
NS_ASSERTION(gid != 0, "We don't have a glyph, but font indicated that it supported this char in tables?");
|
|
gd->glyphIndex = 0;
|
|
return;
|
|
}
|
|
|
|
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
|
|
FT_Error err = FT_Load_Glyph(face, gid, FT_LOAD_NO_AUTOHINT | FT_LOAD_NO_HINTING);
|
|
#else
|
|
FT_Error err = FT_Load_Glyph(face, gid, FT_LOAD_DEFAULT);
|
|
#endif
|
|
|
|
if (err) {
|
|
// hmm, this is weird, we failed to load a glyph that we had?
|
|
NS_WARNING("Failed to load glyph that we got from Get_Char_index");
|
|
|
|
gd->glyphIndex = 0;
|
|
return;
|
|
}
|
|
|
|
gd->glyphIndex = gid;
|
|
gd->lsbDelta = face->glyph->lsb_delta;
|
|
gd->rsbDelta = face->glyph->rsb_delta;
|
|
gd->xAdvance = face->glyph->advance.x;
|
|
}
|