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/*
* Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <winsock2.h>
#include "FontCache.h"
#include "Font.h"
#include "SimpleFontData.h"
#include "StringHash.h"
#include "UnicodeRange.h"
#include <windows.h>
#include <mlang.h>
#if PLATFORM(CG)
#include <ApplicationServices/ApplicationServices.h>
#include <WebKitSystemInterface/WebKitSystemInterface.h>
#endif
using std::min;
namespace WebCore
{
void FontCache::platformInit()
{
#if PLATFORM(CG)
wkSetUpFontCache(1536 * 1024 * 4); // This size matches Mac.
#endif
}
IMLangFontLink2* FontCache::getFontLinkInterface()
{
static IMultiLanguage *multiLanguage;
if (!multiLanguage) {
if (CoCreateInstance(CLSID_CMultiLanguage, 0, CLSCTX_ALL, IID_IMultiLanguage, (void**)&multiLanguage) != S_OK)
return 0;
}
static IMLangFontLink2* langFontLink;
if (!langFontLink) {
if (multiLanguage->QueryInterface(&langFontLink) != S_OK)
return 0;
}
return langFontLink;
}
static int CALLBACK metaFileEnumProc(HDC hdc, HANDLETABLE* table, CONST ENHMETARECORD* record, int tableEntries, LPARAM logFont)
{
if (record->iType == EMR_EXTCREATEFONTINDIRECTW) {
const EMREXTCREATEFONTINDIRECTW* createFontRecord = reinterpret_cast<const EMREXTCREATEFONTINDIRECTW*>(record);
*reinterpret_cast<LOGFONT*>(logFont) = createFontRecord->elfw.elfLogFont;
}
return true;
}
static int CALLBACK linkedFontEnumProc(CONST LOGFONT* logFont, CONST TEXTMETRIC* metrics, DWORD fontType, LPARAM hfont)
{
*reinterpret_cast<HFONT*>(hfont) = CreateFontIndirect(logFont);
return false;
}
static const Vector<String>* getLinkedFonts(String& family)
{
static HashMap<String, Vector<String>*> systemLinkMap;
Vector<String>* result = systemLinkMap.get(family);
if (result)
return result;
result = new Vector<String>;
systemLinkMap.set(family, result);
HKEY fontLinkKey;
if (FAILED(RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"Software\\Microsoft\\Windows NT\\CurrentVersion\\FontLink\\SystemLink", 0, KEY_READ, &fontLinkKey)))
return result;
DWORD linkedFontsBufferSize = 0;
RegQueryValueEx(fontLinkKey, family.charactersWithNullTermination(), 0, NULL, NULL, &linkedFontsBufferSize);
WCHAR* linkedFonts = reinterpret_cast<WCHAR*>(malloc(linkedFontsBufferSize));
if (SUCCEEDED(RegQueryValueEx(fontLinkKey, family.charactersWithNullTermination(), 0, NULL, reinterpret_cast<BYTE*>(linkedFonts), &linkedFontsBufferSize))) {
unsigned i = 0;
unsigned length = linkedFontsBufferSize / sizeof(*linkedFonts);
while (i < length) {
while (i < length && linkedFonts[i] != ',')
i++;
i++;
unsigned j = i;
while (j < length && linkedFonts[j])
j++;
result->append(String(linkedFonts + i, j - i));
i = j + 1;
}
}
free(linkedFonts);
RegCloseKey(fontLinkKey);
return result;
}
static const Vector<DWORD, 4>& getCJKCodePageMasks()
{
// The default order in which we look for a font for a CJK character. If the user's default code page is
// one of these, we will use it first.
static const UINT CJKCodePages[] = {
932, /* Japanese */
936, /* Simplified Chinese */
950, /* Traditional Chinese */
949 /* Korean */
};
static Vector<DWORD, 4> codePageMasks;
static bool initialized;
if (!initialized) {
initialized = true;
IMLangFontLink2* langFontLink = FontCache::getFontLinkInterface();
if (!langFontLink)
return codePageMasks;
UINT defaultCodePage;
DWORD defaultCodePageMask = 0;
if (GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_RETURN_NUMBER | LOCALE_IDEFAULTANSICODEPAGE, reinterpret_cast<LPWSTR>(&defaultCodePage), sizeof(defaultCodePage)))
langFontLink->CodePageToCodePages(defaultCodePage, &defaultCodePageMask);
if (defaultCodePage == CJKCodePages[0] || defaultCodePage == CJKCodePages[1] || defaultCodePage == CJKCodePages[2] || defaultCodePage == CJKCodePages[3])
codePageMasks.append(defaultCodePageMask);
for (unsigned i = 0; i < 4; ++i) {
if (defaultCodePage != CJKCodePages[i]) {
DWORD codePageMask;
langFontLink->CodePageToCodePages(CJKCodePages[i], &codePageMask);
codePageMasks.append(codePageMask);
}
}
}
return codePageMasks;
}
static bool currentFontContainsCharacter(HDC hdc, UChar character)
{
static Vector<char, 512> glyphsetBuffer;
glyphsetBuffer.resize(GetFontUnicodeRanges(hdc, 0));
GLYPHSET* glyphset = reinterpret_cast<GLYPHSET*>(glyphsetBuffer.data());
GetFontUnicodeRanges(hdc, glyphset);
// FIXME: Change this to a binary search.
unsigned i = 0;
while (i < glyphset->cRanges && glyphset->ranges[i].wcLow <= character)
i++;
return i && glyphset->ranges[i - 1].wcLow + glyphset->ranges[i - 1].cGlyphs > character;
}
static HFONT createMLangFont(IMLangFontLink2* langFontLink, HDC hdc, DWORD codePageMask, UChar character = 0)
{
HFONT MLangFont;
HFONT hfont = 0;
if (SUCCEEDED(langFontLink->MapFont(hdc, codePageMask, character, &MLangFont)) && MLangFont) {
LOGFONT lf;
GetObject(MLangFont, sizeof(LOGFONT), &lf);
langFontLink->ReleaseFont(MLangFont);
hfont = CreateFontIndirect(&lf);
}
return hfont;
}
const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
{
UChar character = characters[0];
SimpleFontData* fontData = 0;
HDC hdc = GetDC(0);
HFONT primaryFont = font.primaryFont()->fontDataForCharacter(character)->platformData().hfont();
HGDIOBJ oldFont = SelectObject(hdc, primaryFont);
HFONT hfont = 0;
if (IMLangFontLink2* langFontLink = getFontLinkInterface()) {
// Try MLang font linking first.
DWORD codePages = 0;
langFontLink->GetCharCodePages(character, &codePages);
if (codePages && findCharUnicodeRange(character) == cRangeSetCJK) {
// The CJK character may belong to multiple code pages. We want to
// do font linking against a single one of them, preferring the default
// code page for the user's locale.
const Vector<DWORD, 4>& CJKCodePageMasks = getCJKCodePageMasks();
unsigned numCodePages = CJKCodePageMasks.size();
for (unsigned i = 0; i < numCodePages && !hfont; ++i) {
hfont = createMLangFont(langFontLink, hdc, CJKCodePageMasks[i]);
if (hfont && !(codePages & CJKCodePageMasks[i])) {
// We asked about a code page that is not one of the code pages
// returned by MLang, so the font might not contain the character.
SelectObject(hdc, hfont);
if (!currentFontContainsCharacter(hdc, character)) {
DeleteObject(hfont);
hfont = 0;
}
SelectObject(hdc, primaryFont);
}
}
} else
hfont = createMLangFont(langFontLink, hdc, codePages, character);
}
// A font returned from MLang is trusted to contain the character.
bool containsCharacter = hfont;
if (!hfont) {
// To find out what font Uniscribe would use, we make it draw into a metafile and intercept
// calls to CreateFontIndirect().
HDC metaFileDc = CreateEnhMetaFile(hdc, NULL, NULL, NULL);
SelectObject(metaFileDc, primaryFont);
bool scriptStringOutSucceeded = false;
SCRIPT_STRING_ANALYSIS ssa;
// FIXME: If length is greater than 1, we actually return the font for the last character.
// This function should be renamed getFontDataForCharacter and take a single 32-bit character.
if (SUCCEEDED(ScriptStringAnalyse(metaFileDc, characters, length, 0, -1, SSA_METAFILE | SSA_FALLBACK | SSA_GLYPHS | SSA_LINK,
0, NULL, NULL, NULL, NULL, NULL, &ssa))) {
scriptStringOutSucceeded = SUCCEEDED(ScriptStringOut(ssa, 0, 0, 0, NULL, 0, 0, FALSE));
ScriptStringFree(&ssa);
}
HENHMETAFILE metaFile = CloseEnhMetaFile(metaFileDc);
if (scriptStringOutSucceeded) {
LOGFONT logFont;
logFont.lfFaceName[0] = 0;
EnumEnhMetaFile(0, metaFile, metaFileEnumProc, &logFont, NULL);
if (logFont.lfFaceName[0])
hfont = CreateFontIndirect(&logFont);
}
DeleteEnhMetaFile(metaFile);
}
String familyName;
const Vector<String>* linkedFonts = 0;
unsigned linkedFontIndex = 0;
while (hfont) {
SelectObject(hdc, hfont);
WCHAR name[LF_FACESIZE];
GetTextFace(hdc, LF_FACESIZE, name);
familyName = name;
if (containsCharacter || currentFontContainsCharacter(hdc, character))
break;
if (!linkedFonts)
linkedFonts = getLinkedFonts(familyName);
SelectObject(hdc, oldFont);
DeleteObject(hfont);
hfont = 0;
if (linkedFonts->size() <= linkedFontIndex)
break;
LOGFONT logFont;
logFont.lfCharSet = DEFAULT_CHARSET;
memcpy(logFont.lfFaceName, linkedFonts->at(linkedFontIndex).characters(), linkedFonts->at(linkedFontIndex).length() * sizeof(WCHAR));
logFont.lfFaceName[linkedFonts->at(linkedFontIndex).length()] = 0;
EnumFontFamiliesEx(hdc, &logFont, linkedFontEnumProc, reinterpret_cast<LPARAM>(&hfont), 0);
linkedFontIndex++;
}
if (hfont) {
if (!familyName.isEmpty()) {
FontPlatformData* result = getCachedFontPlatformData(font.fontDescription(), familyName);
if (result)
fontData = getCachedFontData(result);
}
SelectObject(hdc, oldFont);
DeleteObject(hfont);
}
ReleaseDC(0, hdc);
return fontData;
}
FontPlatformData* FontCache::getSimilarFontPlatformData(const Font& font)
{
return 0;
}
FontPlatformData* FontCache::getLastResortFallbackFont(const FontDescription& fontDescription)
{
// FIXME: Would be even better to somehow get the user's default font here. For now we'll pick
// the default that the user would get without changing any prefs.
static AtomicString timesStr("Times New Roman");
return getCachedFontPlatformData(fontDescription, timesStr);
}
static LONG toGDIFontWeight(FontWeight fontWeight)
{
static LONG gdiFontWeights[] = {
FW_THIN, // FontWeight100
FW_EXTRALIGHT, // FontWeight200
FW_LIGHT, // FontWeight300
FW_NORMAL, // FontWeight400
FW_MEDIUM, // FontWeight500
FW_SEMIBOLD, // FontWeight600
FW_BOLD, // FontWeight700
FW_EXTRABOLD, // FontWeight800
FW_HEAVY // FontWeight900
};
return gdiFontWeights[fontWeight];
}
static inline bool isGDIFontWeightBold(LONG gdiFontWeight)
{
return gdiFontWeight >= FW_SEMIBOLD;
}
static LONG adjustedGDIFontWeight(LONG gdiFontWeight, const String& family)
{
static AtomicString lucidaStr("Lucida Grande");
if (equalIgnoringCase(family, lucidaStr)) {
if (gdiFontWeight == FW_NORMAL)
return FW_MEDIUM;
if (gdiFontWeight == FW_BOLD)
return FW_SEMIBOLD;
}
return gdiFontWeight;
}
struct MatchImprovingProcData {
MatchImprovingProcData(LONG desiredWeight, bool desiredItalic)
: m_desiredWeight(desiredWeight)
, m_desiredItalic(desiredItalic)
, m_hasMatched(false)
{
}
LONG m_desiredWeight;
bool m_desiredItalic;
bool m_hasMatched;
LOGFONT m_chosen;
};
static int CALLBACK matchImprovingEnumProc(CONST LOGFONT* candidate, CONST TEXTMETRIC* metrics, DWORD fontType, LPARAM lParam)
{
MatchImprovingProcData* matchData = reinterpret_cast<MatchImprovingProcData*>(lParam);
if (!matchData->m_hasMatched) {
matchData->m_hasMatched = true;
matchData->m_chosen = *candidate;
return 1;
}
if (!candidate->lfItalic != !matchData->m_chosen.lfItalic) {
if (!candidate->lfItalic == !matchData->m_desiredItalic)
matchData->m_chosen = *candidate;
return 1;
}
unsigned chosenWeightDeltaMagnitude = abs(matchData->m_chosen.lfWeight - matchData->m_desiredWeight);
unsigned candidateWeightDeltaMagnitude = abs(candidate->lfWeight - matchData->m_desiredWeight);
// If both are the same distance from the desired weight, prefer the candidate if it is further from regular.
if (chosenWeightDeltaMagnitude == candidateWeightDeltaMagnitude && abs(candidate->lfWeight - FW_NORMAL) > abs(matchData->m_chosen.lfWeight - FW_NORMAL)) {
matchData->m_chosen = *candidate;
return 1;
}
// Otherwise, prefer the one closer to the desired weight.
if (candidateWeightDeltaMagnitude < chosenWeightDeltaMagnitude)
matchData->m_chosen = *candidate;
return 1;
}
static HFONT createGDIFont(const AtomicString& family, LONG desiredWeight, bool desiredItalic, int size)
{
HDC hdc = GetDC(0);
LOGFONT logFont;
logFont.lfCharSet = DEFAULT_CHARSET;
unsigned familyLength = min(family.length(), static_cast<unsigned>(LF_FACESIZE - 1));
memcpy(logFont.lfFaceName, family.characters(), familyLength * sizeof(UChar));
logFont.lfFaceName[familyLength] = 0;
logFont.lfPitchAndFamily = 0;
MatchImprovingProcData matchData(desiredWeight, desiredItalic);
EnumFontFamiliesEx(hdc, &logFont, matchImprovingEnumProc, reinterpret_cast<LPARAM>(&matchData), 0);
ReleaseDC(0, hdc);
if (!matchData.m_hasMatched)
return 0;
matchData.m_chosen.lfHeight = -size;
matchData.m_chosen.lfWidth = 0;
matchData.m_chosen.lfEscapement = 0;
matchData.m_chosen.lfOrientation = 0;
matchData.m_chosen.lfUnderline = false;
matchData.m_chosen.lfStrikeOut = false;
matchData.m_chosen.lfCharSet = DEFAULT_CHARSET;
#if PLATFORM(CG) || PLATFORM(CAIRO)
matchData.m_chosen.lfOutPrecision = OUT_TT_ONLY_PRECIS;
#else
matchData.m_chosen.lfOutPrecision = OUT_TT_PRECIS;
#endif
matchData.m_chosen.lfQuality = DEFAULT_QUALITY;
matchData.m_chosen.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
return CreateFontIndirect(&matchData.m_chosen);
}
struct TraitsInFamilyProcData {
TraitsInFamilyProcData(const AtomicString& familyName)
: m_familyName(familyName)
{
}
const AtomicString& m_familyName;
HashSet<unsigned> m_traitsMasks;
};
static int CALLBACK traitsInFamilyEnumProc(CONST LOGFONT* logFont, CONST TEXTMETRIC* metrics, DWORD fontType, LPARAM lParam)
{
TraitsInFamilyProcData* procData = reinterpret_cast<TraitsInFamilyProcData*>(lParam);
unsigned traitsMask = 0;
traitsMask |= logFont->lfItalic ? FontStyleItalicMask : FontStyleNormalMask;
traitsMask |= FontVariantNormalMask;
LONG weight = adjustedGDIFontWeight(logFont->lfWeight, procData->m_familyName);
traitsMask |= weight == FW_THIN ? FontWeight100Mask :
weight == FW_EXTRALIGHT ? FontWeight200Mask :
weight == FW_LIGHT ? FontWeight300Mask :
weight == FW_NORMAL ? FontWeight400Mask :
weight == FW_MEDIUM ? FontWeight500Mask :
weight == FW_SEMIBOLD ? FontWeight600Mask :
weight == FW_BOLD ? FontWeight700Mask :
weight == FW_EXTRABOLD ? FontWeight800Mask :
FontWeight900Mask;
procData->m_traitsMasks.add(traitsMask);
return 1;
}
void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
{
HDC hdc = GetDC(0);
LOGFONT logFont;
logFont.lfCharSet = DEFAULT_CHARSET;
unsigned familyLength = min(familyName.length(), static_cast<unsigned>(LF_FACESIZE - 1));
memcpy(logFont.lfFaceName, familyName.characters(), familyLength * sizeof(UChar));
logFont.lfFaceName[familyLength] = 0;
logFont.lfPitchAndFamily = 0;
TraitsInFamilyProcData procData(familyName);
EnumFontFamiliesEx(hdc, &logFont, traitsInFamilyEnumProc, reinterpret_cast<LPARAM>(&procData), 0);
copyToVector(procData.m_traitsMasks, traitsMasks);
ReleaseDC(0, hdc);
}
FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
{
bool isLucidaGrande = false;
static AtomicString lucidaStr("Lucida Grande");
if (equalIgnoringCase(family, lucidaStr))
isLucidaGrande = true;
bool useGDI = fontDescription.renderingMode() == AlternateRenderingMode && !isLucidaGrande;
// The logical size constant is 32. We do this for subpixel precision when rendering using Uniscribe.
// This masks rounding errors related to the HFONT metrics being different from the CGFont metrics.
// FIXME: We will eventually want subpixel precision for GDI mode, but the scaled rendering doesn't
// look as nice. That may be solvable though.
LONG weight = adjustedGDIFontWeight(toGDIFontWeight(fontDescription.weight()), family);
HFONT hfont = createGDIFont(family, weight, fontDescription.italic(), fontDescription.computedPixelSize() * (useGDI ? 1 : 32));
if (!hfont)
return 0;
if (isLucidaGrande)
useGDI = false; // Never use GDI for Lucida Grande.
LOGFONT logFont;
GetObject(hfont, sizeof(LOGFONT), &logFont);
bool synthesizeBold = isGDIFontWeightBold(weight) && !isGDIFontWeightBold(logFont.lfWeight);
bool synthesizeItalic = fontDescription.italic() && !logFont.lfItalic;
FontPlatformData* result = new FontPlatformData(hfont, fontDescription.computedPixelSize(), synthesizeBold, synthesizeItalic, useGDI);
#if PLATFORM(CG)
bool fontCreationFailed = !result->cgFont();
#elif PLATFORM(CAIRO)
bool fontCreationFailed = !result->fontFace();
#endif
if (fontCreationFailed) {
// The creation of the CGFontRef failed for some reason. We already asserted in debug builds, but to make
// absolutely sure that we don't use this font, go ahead and return 0 so that we can fall back to the next
// font.
delete result;
DeleteObject(hfont);
return 0;
}
return result;
}
}
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