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Diffstat (limited to 'WebCore/platform/graphics/chromium/FontUtilsChromiumWin.cpp')
| -rw-r--r-- | WebCore/platform/graphics/chromium/FontUtilsChromiumWin.cpp | 438 |
1 files changed, 0 insertions, 438 deletions
diff --git a/WebCore/platform/graphics/chromium/FontUtilsChromiumWin.cpp b/WebCore/platform/graphics/chromium/FontUtilsChromiumWin.cpp deleted file mode 100644 index bea0572..0000000 --- a/WebCore/platform/graphics/chromium/FontUtilsChromiumWin.cpp +++ /dev/null @@ -1,438 +0,0 @@ -/* - * Copyright (c) 2006, 2007, 2008, 2009, 2010, Google 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: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * 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. - * * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT - * OWNER OR 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 "FontUtilsChromiumWin.h" - -#include <limits> - -#include "PlatformString.h" -#include "UniscribeHelper.h" -#include <unicode/locid.h> -#include <unicode/uchar.h> -#include <wtf/HashMap.h> -#include <wtf/text/StringHash.h> - -namespace WebCore { - -namespace { - -bool isFontPresent(const UChar* fontName) -{ - HFONT hfont = CreateFont(12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - fontName); - if (!hfont) - return false; - HDC dc = GetDC(0); - HGDIOBJ oldFont = static_cast<HFONT>(SelectObject(dc, hfont)); - WCHAR actualFontName[LF_FACESIZE]; - GetTextFace(dc, LF_FACESIZE, actualFontName); - actualFontName[LF_FACESIZE - 1] = 0; - SelectObject(dc, oldFont); - DeleteObject(hfont); - ReleaseDC(0, dc); - // We don't have to worry about East Asian fonts with locale-dependent - // names here for now. - return !wcscmp(fontName, actualFontName); -} - -// A simple mapping from UScriptCode to family name. This is a sparse array, -// which works well since the range of UScriptCode values is small. -typedef const UChar* ScriptToFontMap[USCRIPT_CODE_LIMIT]; - -void initializeScriptFontMap(ScriptToFontMap& scriptFontMap) -{ - struct FontMap { - UScriptCode script; - const UChar* family; - }; - - static const FontMap fontMap[] = { - {USCRIPT_LATIN, L"times new roman"}, - {USCRIPT_GREEK, L"times new roman"}, - {USCRIPT_CYRILLIC, L"times new roman"}, - // FIXME: Consider trying new Vista fonts before XP fonts for CJK. - // Some Vista users do want to use Vista cleartype CJK fonts. If we - // did, the results of tests with CJK characters would have to be - // regenerated for Vista. - {USCRIPT_SIMPLIFIED_HAN, L"simsun"}, - {USCRIPT_TRADITIONAL_HAN, L"pmingliu"}, - {USCRIPT_HIRAGANA, L"ms pgothic"}, - {USCRIPT_KATAKANA, L"ms pgothic"}, - {USCRIPT_KATAKANA_OR_HIRAGANA, L"ms pgothic"}, - {USCRIPT_HANGUL, L"gulim"}, - {USCRIPT_THAI, L"tahoma"}, - {USCRIPT_HEBREW, L"david"}, - {USCRIPT_ARABIC, L"tahoma"}, - {USCRIPT_DEVANAGARI, L"mangal"}, - {USCRIPT_BENGALI, L"vrinda"}, - {USCRIPT_GURMUKHI, L"raavi"}, - {USCRIPT_GUJARATI, L"shruti"}, - {USCRIPT_TAMIL, L"latha"}, - {USCRIPT_TELUGU, L"gautami"}, - {USCRIPT_KANNADA, L"tunga"}, - {USCRIPT_GEORGIAN, L"sylfaen"}, - {USCRIPT_ARMENIAN, L"sylfaen"}, - {USCRIPT_THAANA, L"mv boli"}, - {USCRIPT_CANADIAN_ABORIGINAL, L"euphemia"}, - {USCRIPT_CHEROKEE, L"plantagenet cherokee"}, - {USCRIPT_MONGOLIAN, L"mongolian balti"}, - // For USCRIPT_COMMON, we map blocks to scripts when - // that makes sense. - }; - - struct ScriptToFontFamilies { - UScriptCode script; - const UChar** families; - }; - - // Kartika on Vista or earlier lacks the support for Chillu - // letters added to Unicode 5.1. - // Try AnjaliOldLipi (a very widely used Malaylalam font with the full - // Unicode 5.x support) before falling back to Kartika. - static const UChar* malayalamFonts[] = {L"AnjaliOldLipi", L"Lohit Malayalam", L"Kartika", L"Rachana", 0}; - // Try Khmer OS before Vista fonts because 'Khmer OS' goes along better - // with Latin and looks better/larger for the same size. - static const UChar* khmerFonts[] = {L"Khmer OS", L"MoolBoran", L"DaunPenh", L"Code2000", 0}; - // For the following 6 scripts, two or fonts are listed. The fonts in - // the 1st slot are not available on Windows XP. To support these - // scripts on XP, listed in the rest of slots are widely used - // fonts. - static const UChar* ethiopicFonts[] = {L"Nyala", L"Abyssinica SIL", L"Ethiopia Jiret", L"Visual Geez Unicode", L"GF Zemen Unicode", 0}; - static const UChar* oriyaFonts[] = {L"Kalinga", L"ori1Uni", L"Lohit Oriya", 0}; - static const UChar* laoFonts[] = {L"DokChampa", L"Saysettha OT", L"Phetsarath OT", L"Code2000", 0}; - static const UChar* tibetanFonts[] = {L"Microsoft Himalaya", L"Jomolhari", L"Tibetan Machine Uni", 0}; - static const UChar* sinhalaFonts[] = {L"Iskoola Pota", L"AksharUnicode", 0}; - static const UChar* yiFonts[] = {L"Microsoft Yi Balti", L"Nuosu SIL", L"Code2000", 0}; - // http://www.bethmardutho.org/support/meltho/download/index.php - static const UChar* syriacFonts[] = {L"Estrangelo Edessa", L"Estrangelo Nisibin", L"Code2000", 0}; - // No Myanmar/Burmese font is shipped with Windows, yet. Try a few - // widely available/used ones that supports Unicode 5.1 or later. - static const UChar* myanmarFonts[] = {L"Padauk", L"Parabaik", L"Myanmar3", L"Code2000", 0}; - - static const ScriptToFontFamilies scriptToFontFamilies[] = { - {USCRIPT_MALAYALAM, malayalamFonts}, - {USCRIPT_KHMER, khmerFonts}, - {USCRIPT_ETHIOPIC, ethiopicFonts}, - {USCRIPT_ORIYA, oriyaFonts}, - {USCRIPT_LAO, laoFonts}, - {USCRIPT_TIBETAN, tibetanFonts}, - {USCRIPT_SINHALA, sinhalaFonts}, - {USCRIPT_YI, yiFonts}, - {USCRIPT_SYRIAC, syriacFonts}, - {USCRIPT_MYANMAR, myanmarFonts}, - }; - - for (size_t i = 0; i < WTF_ARRAY_LENGTH(fontMap); ++i) - scriptFontMap[fontMap[i].script] = fontMap[i].family; - - // FIXME: Instead of scanning the hard-coded list, we have to - // use EnumFont* to 'inspect' fonts to pick up fonts covering scripts - // when it's possible (e.g. using OS/2 table). If we do that, this - // had better be pulled out of here. - for (size_t i = 0; i < WTF_ARRAY_LENGTH(scriptToFontFamilies); ++i) { - UScriptCode script = scriptToFontFamilies[i].script; - scriptFontMap[script] = 0; - const UChar** familyPtr = scriptToFontFamilies[i].families; - while (*familyPtr) { - if (isFontPresent(*familyPtr)) { - scriptFontMap[script] = *familyPtr; - break; - } - ++familyPtr; - } - } - - // Initialize the locale-dependent mapping. - // Since Chrome synchronizes the ICU default locale with its UI locale, - // this ICU locale tells the current UI locale of Chrome. - icu::Locale locale = icu::Locale::getDefault(); - const UChar* localeFamily = 0; - if (locale == icu::Locale::getJapanese()) - localeFamily = scriptFontMap[USCRIPT_HIRAGANA]; - else if (locale == icu::Locale::getKorean()) - localeFamily = scriptFontMap[USCRIPT_HANGUL]; - else if (locale == icu::Locale::getTraditionalChinese()) - localeFamily = scriptFontMap[USCRIPT_TRADITIONAL_HAN]; - else { - // For other locales, use the simplified Chinese font for Han. - localeFamily = scriptFontMap[USCRIPT_SIMPLIFIED_HAN]; - } - if (localeFamily) - scriptFontMap[USCRIPT_HAN] = localeFamily; -} - -// There are a lot of characters in USCRIPT_COMMON that can be covered -// by fonts for scripts closely related to them. See -// http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[:Script=Common:] -// FIXME: make this more efficient with a wider coverage -UScriptCode getScriptBasedOnUnicodeBlock(int ucs4) -{ - UBlockCode block = ublock_getCode(ucs4); - switch (block) { - case UBLOCK_CJK_SYMBOLS_AND_PUNCTUATION: - return USCRIPT_HAN; - case UBLOCK_HIRAGANA: - case UBLOCK_KATAKANA: - return USCRIPT_HIRAGANA; - case UBLOCK_ARABIC: - return USCRIPT_ARABIC; - case UBLOCK_THAI: - return USCRIPT_THAI; - case UBLOCK_GREEK: - return USCRIPT_GREEK; - case UBLOCK_DEVANAGARI: - // For Danda and Double Danda (U+0964, U+0965), use a Devanagari - // font for now although they're used by other scripts as well. - // Without a context, we can't do any better. - return USCRIPT_DEVANAGARI; - case UBLOCK_ARMENIAN: - return USCRIPT_ARMENIAN; - case UBLOCK_GEORGIAN: - return USCRIPT_GEORGIAN; - case UBLOCK_KANNADA: - return USCRIPT_KANNADA; - default: - return USCRIPT_COMMON; - } -} - -UScriptCode getScript(int ucs4) -{ - UErrorCode err = U_ZERO_ERROR; - UScriptCode script = uscript_getScript(ucs4, &err); - // If script is invalid, common or inherited or there's an error, - // infer a script based on the unicode block of a character. - if (script <= USCRIPT_INHERITED || U_FAILURE(err)) - script = getScriptBasedOnUnicodeBlock(ucs4); - return script; -} - -const int kUndefinedAscent = std::numeric_limits<int>::min(); - -// Given an HFONT, return the ascent. If GetTextMetrics fails, -// kUndefinedAscent is returned, instead. -int getAscent(HFONT hfont) -{ - HDC dc = GetDC(0); - HGDIOBJ oldFont = SelectObject(dc, hfont); - TEXTMETRIC tm; - BOOL gotMetrics = GetTextMetrics(dc, &tm); - SelectObject(dc, oldFont); - ReleaseDC(0, dc); - return gotMetrics ? tm.tmAscent : kUndefinedAscent; -} - -struct FontData { - FontData() - : hfont(0) - , ascent(kUndefinedAscent) - , scriptCache(0) - { - } - - HFONT hfont; - int ascent; - mutable SCRIPT_CACHE scriptCache; -}; - -// Again, using hash_map does not earn us much here. page_cycler_test intl2 -// gave us a 'better' result with map than with hash_map even though they're -// well-within 1-sigma of each other so that the difference is not significant. -// On the other hand, some pages in intl2 seem to take longer to load with map -// in the 1st pass. Need to experiment further. -typedef HashMap<String, FontData> FontDataCache; - -} // namespace - -// FIXME: this is font fallback code version 0.1 -// - Cover all the scripts -// - Get the default font for each script/generic family from the -// preference instead of hardcoding in the source. -// (at least, read values from the registry for IE font settings). -// - Support generic families (from FontDescription) -// - If the default font for a script is not available, -// try some more fonts known to support it. Finally, we can -// use EnumFontFamilies or similar APIs to come up with a list of -// fonts supporting the script and cache the result. -// - Consider using UnicodeSet (or UnicodeMap) converted from -// GLYPHSET (BMP) or directly read from truetype cmap tables to -// keep track of which character is supported by which font -// - Update script_font_cache in response to WM_FONTCHANGE - -const UChar* getFontFamilyForScript(UScriptCode script, - FontDescription::GenericFamilyType generic) -{ - static ScriptToFontMap scriptFontMap; - static bool initialized = false; - if (!initialized) { - initializeScriptFontMap(scriptFontMap); - initialized = true; - } - if (script == USCRIPT_INVALID_CODE) - return 0; - ASSERT(script < USCRIPT_CODE_LIMIT); - return scriptFontMap[script]; -} - -// FIXME: -// - Handle 'Inherited', 'Common' and 'Unknown' -// (see http://www.unicode.org/reports/tr24/#Usage_Model ) -// For 'Inherited' and 'Common', perhaps we need to -// accept another parameter indicating the previous family -// and just return it. -// - All the characters (or characters up to the point a single -// font can cover) need to be taken into account -const UChar* getFallbackFamily(const UChar* characters, - int length, - FontDescription::GenericFamilyType generic, - UChar32* charChecked, - UScriptCode* scriptChecked) -{ - ASSERT(characters && characters[0] && length > 0); - UScriptCode script = USCRIPT_COMMON; - - // Sometimes characters common to script (e.g. space) is at - // the beginning of a string so that we need to skip them - // to get a font required to render the string. - int i = 0; - UChar32 ucs4 = 0; - while (i < length && script == USCRIPT_COMMON) { - U16_NEXT(characters, i, length, ucs4); - script = getScript(ucs4); - } - - // For the full-width ASCII characters (U+FF00 - U+FF5E), use the font for - // Han (determined in a locale-dependent way above). Full-width ASCII - // characters are rather widely used in Japanese and Chinese documents and - // they're fully covered by Chinese, Japanese and Korean fonts. - if (0xFF00 < ucs4 && ucs4 < 0xFF5F) - script = USCRIPT_HAN; - - if (script == USCRIPT_COMMON) - script = getScriptBasedOnUnicodeBlock(ucs4); - - const UChar* family = getFontFamilyForScript(script, generic); - // Another lame work-around to cover non-BMP characters. - // If the font family for script is not found or the character is - // not in BMP (> U+FFFF), we resort to the hard-coded list of - // fallback fonts for now. - if (!family || ucs4 > 0xFFFF) { - int plane = ucs4 >> 16; - switch (plane) { - case 1: - family = L"code2001"; - break; - case 2: - // Use a Traditional Chinese ExtB font if in Traditional Chinese locale. - // Otherwise, use a Simplified Chinese ExtB font. Windows Japanese - // fonts do support a small subset of ExtB (that are included in JIS X 0213), - // but its coverage is rather sparse. - // Eventually, this should be controlled by lang/xml:lang. - if (icu::Locale::getDefault() == icu::Locale::getTraditionalChinese()) - family = L"pmingliu-extb"; - else - family = L"simsun-extb"; - break; - default: - family = L"lucida sans unicode"; - } - } - - if (charChecked) - *charChecked = ucs4; - if (scriptChecked) - *scriptChecked = script; - return family; -} - -// Be aware that this is not thread-safe. -bool getDerivedFontData(const UChar* family, - int style, - LOGFONT* logfont, - int* ascent, - HFONT* hfont, - SCRIPT_CACHE** scriptCache) -{ - ASSERT(logfont); - ASSERT(family); - ASSERT(*family); - - // It does not matter that we leak font data when we exit. - static FontDataCache fontDataCache; - - // FIXME: This comes up pretty high in the profile so that - // we need to measure whether using SHA256 (after coercing all the - // fields to char*) is faster than String::format. - String fontKey = String::format("%1d:%d:%ls", style, logfont->lfHeight, family); - FontDataCache::iterator iter = fontDataCache.find(fontKey); - FontData* derived; - if (iter == fontDataCache.end()) { - ASSERT(wcslen(family) < LF_FACESIZE); - wcscpy_s(logfont->lfFaceName, LF_FACESIZE, family); - // FIXME: CreateFontIndirect always comes up with - // a font even if there's no font matching the name. Need to - // check it against what we actually want (as is done in - // FontCacheWin.cpp) - pair<FontDataCache::iterator, bool> entry = fontDataCache.add(fontKey, FontData()); - derived = &entry.first->second; - derived->hfont = CreateFontIndirect(logfont); - // GetAscent may return kUndefinedAscent, but we still want to - // cache it so that we won't have to call CreateFontIndirect once - // more for HFONT next time. - derived->ascent = getAscent(derived->hfont); - } else { - derived = &iter->second; - // Last time, GetAscent failed so that only HFONT was - // cached. Try once more assuming that TryPreloadFont - // was called by a caller between calls. - if (kUndefinedAscent == derived->ascent) - derived->ascent = getAscent(derived->hfont); - } - *hfont = derived->hfont; - *ascent = derived->ascent; - *scriptCache = &(derived->scriptCache); - return *ascent != kUndefinedAscent; -} - -int getStyleFromLogfont(const LOGFONT* logfont) -{ - // FIXME: consider defining UNDEFINED or INVALID for style and - // returning it when logfont is 0 - if (!logfont) { - ASSERT_NOT_REACHED(); - return FontStyleNormal; - } - return (logfont->lfItalic ? FontStyleItalic : FontStyleNormal) | - (logfont->lfUnderline ? FontStyleUnderlined : FontStyleNormal) | - (logfont->lfWeight >= 700 ? FontStyleBold : FontStyleNormal); -} - -} // namespace WebCore |