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Diffstat (limited to 'webkit/port/platform/graphics/chromium/FontUtilsChromiumWin.cpp')
| -rw-r--r-- | webkit/port/platform/graphics/chromium/FontUtilsChromiumWin.cpp | 338 |
1 files changed, 0 insertions, 338 deletions
diff --git a/webkit/port/platform/graphics/chromium/FontUtilsChromiumWin.cpp b/webkit/port/platform/graphics/chromium/FontUtilsChromiumWin.cpp deleted file mode 100644 index 3128259..0000000 --- a/webkit/port/platform/graphics/chromium/FontUtilsChromiumWin.cpp +++ /dev/null @@ -1,338 +0,0 @@ -// Copyright (c) 2006-2008, 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 "StringHash.h" -#include "UniscribeHelper.h" -#include <unicode/locid.h> -#include <unicode/uchar.h> -#include <wtf/HashMap.h> - -namespace WebCore { - -namespace { - -// 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; - }; - - const static FontMap fontMap[] = { - {USCRIPT_LATIN, L"times new roman"}, - {USCRIPT_GREEK, L"times new roman"}, - {USCRIPT_CYRILLIC, L"times new roman"}, - {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_ORIYA, L"kalinga"}, - {USCRIPT_TAMIL, L"latha"}, - {USCRIPT_TELUGU, L"gautami"}, - {USCRIPT_KANNADA, L"tunga"}, - {USCRIPT_MALAYALAM, L"kartika"}, - {USCRIPT_LAO, L"dokchampa"}, - {USCRIPT_TIBETAN, L"microsoft himalaya"}, - {USCRIPT_GEORGIAN, L"sylfaen"}, - {USCRIPT_ARMENIAN, L"sylfaen"}, - {USCRIPT_ETHIOPIC, L"nyala"}, - {USCRIPT_CANADIAN_ABORIGINAL, L"euphemia"}, - {USCRIPT_CHEROKEE, L"plantagenet cherokee"}, - {USCRIPT_YI, L"microsoft yi balti"}, - {USCRIPT_SINHALA, L"iskoola pota"}, - {USCRIPT_SYRIAC, L"estrangelo edessa"}, - {USCRIPT_KHMER, L"daunpenh"}, - {USCRIPT_THAANA, L"mv boli"}, - {USCRIPT_MONGOLIAN, L"mongolian balti"}, - {USCRIPT_MYANMAR, L"padauk"}, - // For USCRIPT_COMMON, we map blocks to scripts when - // that makes sense. - }; - - for (int i = 0; i < sizeof(fontMap) / sizeof(fontMap[0]); ++i) - scriptFontMap[fontMap[i].script] = fontMap[i].family; - - // 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. - Locale locale = Locale::getDefault(); - const UChar* localeFamily = NULL; - if (locale == Locale::getJapanese()) { - localeFamily = scriptFontMap[USCRIPT_HIRAGANA]; - } else if (locale == Locale::getKorean()) { - localeFamily = scriptFontMap[USCRIPT_HANGUL]; - } else { - // Use Simplified Chinese font for all other locales including - // Traditional Chinese because Simsun (SC font) has a wider - // coverage (covering both SC and TC) than PMingLiu (TC font). - // This also speeds up the TC version of Chrome when rendering SC - // pages. - localeFamily = scriptFontMap[USCRIPT_SIMPLIFIED_HAN]; - } - if (localeFamily) - scriptFontMap[USCRIPT_HAN] = localeFamily; -} - -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(NULL); - HGDIOBJ oldFont = SelectObject(dc, hfont); - TEXTMETRIC tm; - BOOL gotMetrics = GetTextMetrics(dc, &tm); - SelectObject(dc, oldFont); - ReleaseDC(NULL, dc); - return gotMetrics ? tm.tmAscent : kUndefinedAscent; -} - -struct FontData { - FontData() : hfont(NULL), ascent(kUndefinedAscent), scriptCache(NULL) {} - 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 - -// TODO(jungshik) : 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 NULL; - ASSERT(script < USCRIPT_CODE_LIMIT); - return scriptFontMap[script]; -} - -// TODO(jungshik) -// - 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 || - script == USCRIPT_INVALID_CODE) { - U16_NEXT(characters, i, length, ucs4); - UErrorCode err = U_ZERO_ERROR; - script = uscript_getScript(ucs4, &err); - // silently ignore the error - } - - // hack for full width ASCII. For the full-width ASCII, use the font - // for Han (which is locale-dependent). - if (0xFF00 < ucs4 && ucs4 < 0xFF5F) - script = USCRIPT_HAN; - - // 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:] - // TODO(jungshik): make this more efficient with a wider coverage - if (script == USCRIPT_COMMON || script == USCRIPT_INHERITED) { - UBlockCode block = ublock_getCode(ucs4); - switch (block) { - case UBLOCK_BASIC_LATIN: - script = USCRIPT_LATIN; - break; - case UBLOCK_CJK_SYMBOLS_AND_PUNCTUATION: - script = USCRIPT_HAN; - break; - case UBLOCK_HIRAGANA: - case UBLOCK_KATAKANA: - script = USCRIPT_HIRAGANA; - break; - case UBLOCK_ARABIC: - script = USCRIPT_ARABIC; - break; - case UBLOCK_GREEK: - script = USCRIPT_GREEK; - break; - 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. - script = USCRIPT_DEVANAGARI; - break; - case UBLOCK_ARMENIAN: - script = USCRIPT_ARMENIAN; - break; - case UBLOCK_GEORGIAN: - script = USCRIPT_GEORGIAN; - break; - case UBLOCK_KANNADA: - script = USCRIPT_KANNADA; - break; - } - } - - // Another lame work-around to cover non-BMP characters. - const UChar* family = getFontFamilyForScript(script, generic); - if (!family) { - int plane = ucs4 >> 16; - switch (plane) { - case 1: - family = L"code2001"; - break; - case 2: - 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 && family && *family); - - // It does not matter that we leak font data when we exit. - static FontDataCache fontDataCache; - - // TODO(jungshik) : 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); - // TODO(jungshik): 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) { - // TODO(jungshik) : consider defining UNDEFINED or INVALID for style and - // returning it when logfont is NULL - if (!logfont) { - ASSERT_NOT_REACHED(); - return FontStyleNormal; - } - return (logfont->lfItalic ? FontStyleItalic : FontStyleNormal) | - (logfont->lfUnderline ? FontStyleUnderlined : FontStyleNormal) | - (logfont->lfWeight >= 700 ? FontStyleBold : FontStyleNormal); -} - -} // namespace WebCore |