| /* |
| * Copyright (C) 2006, 2007 Apple Computer, Inc. |
| * Copyright (c) 2006, 2007, 2008, 2009, 2012 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 "core/platform/graphics/FontCache.h" |
| |
| #include "RuntimeEnabledFeatures.h" |
| #include "SkFontMgr.h" |
| #include "SkTypeface_win.h" |
| #include "core/platform/graphics/Font.h" |
| #include "core/platform/graphics/SimpleFontData.h" |
| #include "core/platform/graphics/chromium/FontFallbackWin.h" |
| #include "core/platform/graphics/chromium/FontPlatformDataChromiumWin.h" |
| |
| namespace WebCore { |
| |
| FontCache::FontCache() |
| : m_purgePreventCount(0) |
| { |
| SkFontMgr* fontManager = 0; |
| |
| // Prefer DirectWrite (if runtime feature is enabled) but fallback |
| // to GDI on platforms where DirectWrite is not supported. |
| if (RuntimeEnabledFeatures::directWriteEnabled()) |
| fontManager = SkFontMgr_New_DirectWrite(); |
| if (!fontManager) |
| fontManager = SkFontMgr_New_GDI(); |
| |
| m_fontManager = adoptPtr(fontManager); |
| } |
| |
| |
| static bool fontContainsCharacter(const FontPlatformData* fontData, const wchar_t* family, UChar32 character) |
| { |
| SkPaint paint; |
| fontData->setupPaint(&paint); |
| paint.setTextEncoding(SkPaint::kUTF32_TextEncoding); |
| |
| uint16_t glyph; |
| paint.textToGlyphs(&character, sizeof(character), &glyph); |
| return glyph; |
| } |
| |
| // Given the desired base font, this will create a SimpleFontData for a specific |
| // font that can be used to render the given range of characters. |
| PassRefPtr<SimpleFontData> FontCache::getFontDataForCharacter(const Font& font, const UChar32 character) |
| { |
| // FIXME: Consider passing fontDescription.dominantScript() |
| // to GetFallbackFamily here. |
| FontDescription fontDescription = font.fontDescription(); |
| UScriptCode script; |
| const wchar_t* family = getFallbackFamily(character, |
| fontDescription.genericFamily(), |
| &script); |
| FontPlatformData* data = 0; |
| if (family) |
| data = getFontResourcePlatformData(font.fontDescription(), AtomicString(family, wcslen(family)), false); |
| |
| // Last resort font list : PanUnicode. CJK fonts have a pretty |
| // large repertoire. Eventually, we need to scan all the fonts |
| // on the system to have a Firefox-like coverage. |
| // Make sure that all of them are lowercased. |
| const static wchar_t* const cjkFonts[] = { |
| L"arial unicode ms", |
| L"ms pgothic", |
| L"simsun", |
| L"gulim", |
| L"pmingliu", |
| L"wenquanyi zen hei", // Partial CJK Ext. A coverage but more widely known to Chinese users. |
| L"ar pl shanheisun uni", |
| L"ar pl zenkai uni", |
| L"han nom a", // Complete CJK Ext. A coverage. |
| L"code2000" // Complete CJK Ext. A coverage. |
| // CJK Ext. B fonts are not listed here because it's of no use |
| // with our current non-BMP character handling because we use |
| // Uniscribe for it and that code path does not go through here. |
| }; |
| |
| const static wchar_t* const commonFonts[] = { |
| L"tahoma", |
| L"arial unicode ms", |
| L"lucida sans unicode", |
| L"microsoft sans serif", |
| L"palatino linotype", |
| // Six fonts below (and code2000 at the end) are not from MS, but |
| // once installed, cover a very wide range of characters. |
| L"dejavu serif", |
| L"dejavu sasns", |
| L"freeserif", |
| L"freesans", |
| L"gentium", |
| L"gentiumalt", |
| L"ms pgothic", |
| L"simsun", |
| L"gulim", |
| L"pmingliu", |
| L"code2000" |
| }; |
| |
| const wchar_t* const* panUniFonts = 0; |
| int numFonts = 0; |
| if (script == USCRIPT_HAN) { |
| panUniFonts = cjkFonts; |
| numFonts = WTF_ARRAY_LENGTH(cjkFonts); |
| } else { |
| panUniFonts = commonFonts; |
| numFonts = WTF_ARRAY_LENGTH(commonFonts); |
| } |
| // Font returned from getFallbackFamily may not cover |character| |
| // because it's based on script to font mapping. This problem is |
| // critical enough for non-Latin scripts (especially Han) to |
| // warrant an additional (real coverage) check with fontCotainsCharacter. |
| int i; |
| for (i = 0; (!data || !fontContainsCharacter(data, family, character)) && i < numFonts; ++i) { |
| family = panUniFonts[i]; |
| data = getFontResourcePlatformData(font.fontDescription(), AtomicString(family, wcslen(family))); |
| } |
| // When i-th font (0-base) in |panUniFonts| contains a character and |
| // we get out of the loop, |i| will be |i + 1|. That is, if only the |
| // last font in the array covers the character, |i| will be numFonts. |
| // So, we have to use '<=" rather than '<' to see if we found a font |
| // covering the character. |
| if (i <= numFonts) |
| return getFontResourceData(data, DoNotRetain); |
| |
| return 0; |
| } |
| |
| static inline bool equalIgnoringCase(const AtomicString& a, const SkString& b) |
| { |
| return equalIgnoringCase(a, AtomicString::fromUTF8(b.c_str())); |
| } |
| |
| static bool typefacesMatchesFamily(const SkTypeface* tf, const AtomicString& family) |
| { |
| SkTypeface::LocalizedStrings* actualFamilies = tf->createFamilyNameIterator(); |
| bool matchesRequestedFamily = false; |
| SkTypeface::LocalizedString actualFamily; |
| |
| while (actualFamilies->next(&actualFamily)) { |
| if (equalIgnoringCase(family, actualFamily.fString)) { |
| matchesRequestedFamily = true; |
| break; |
| } |
| } |
| actualFamilies->unref(); |
| |
| // getFamilyName may return a name not returned by the createFamilyNameIterator. |
| // Specifically in cases where Windows substitutes the font based on the |
| // HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontSubstitutes registry entries. |
| if (!matchesRequestedFamily) { |
| SkString familyName; |
| tf->getFamilyName(&familyName); |
| if (equalIgnoringCase(family, familyName)) |
| matchesRequestedFamily = true; |
| } |
| |
| return matchesRequestedFamily; |
| } |
| |
| FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family, float fontSize) |
| { |
| CString name; |
| RefPtr<SkTypeface> tf = createTypeface(fontDescription, family, name); |
| if (!tf) |
| return 0; |
| |
| // Windows will always give us a valid pointer here, even if the face name |
| // is non-existent. We have to double-check and see if the family name was |
| // really used. |
| // FIXME: Do we need to use predefined fonts "guaranteed" to exist |
| // when we're running in layout-test mode? |
| if (!typefacesMatchesFamily(tf.get(), family)) { |
| return 0; |
| } |
| |
| FontPlatformData* result = new FontPlatformData(tf, |
| name.data(), |
| fontSize, |
| fontDescription.weight() >= FontWeightBold && !tf->isBold(), |
| fontDescription.italic() && !tf->isItalic(), |
| fontDescription.orientation()); |
| return result; |
| } |
| |
| } |