| /* |
| * Copyright (c) 2006, 2007, 2008, 2009 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 <unicode/locid.h> |
| #include "sky/engine/platform/NotImplemented.h" |
| #include "sky/engine/platform/fonts/AlternateFontFamily.h" |
| #include "sky/engine/platform/fonts/FontCache.h" |
| #include "sky/engine/platform/fonts/FontDescription.h" |
| #include "sky/engine/platform/fonts/FontFaceCreationParams.h" |
| #include "sky/engine/platform/fonts/SimpleFontData.h" |
| #include "sky/engine/public/platform/Platform.h" |
| #include "sky/engine/public/platform/linux/WebSandboxSupport.h" |
| #include "sky/engine/wtf/Assertions.h" |
| #include "sky/engine/wtf/text/AtomicString.h" |
| #include "sky/engine/wtf/text/CString.h" |
| #include "third_party/skia/include/core/SkStream.h" |
| #include "third_party/skia/include/core/SkTypeface.h" |
| #include "third_party/skia/include/ports/SkFontMgr.h" |
| |
| #if !OS(WIN) && !OS(ANDROID) |
| #include "third_party/skia/include/ports/SkFontConfigInterface.h" |
| #endif |
| |
| #if !OS(WIN) && !OS(ANDROID) && !OS(IOS) && !OS(MACOSX) |
| // TODO(bungeman) remove this temporary code ASAP. |
| // This namespace exists to ease transition of SkTypeface from using SkStream to SkStreamAsset. |
| namespace tmp { |
| // Like std::declval but only returns lvalue references, ok since it isn't used on rvalue references. |
| template<typename T> T& declvall(); |
| // The return type of SkFontConfigInterface::openStream(const SkFontConfigInterface::FontIdentity&). |
| using StreamType = decltype(tmp::declvall<SkFontConfigInterface>().openStream(tmp::declvall<const SkFontConfigInterface::FontIdentity&>())); |
| } |
| static tmp::StreamType streamForFontconfigInterfaceId(int fontconfigInterfaceId) |
| { |
| SkAutoTUnref<SkFontConfigInterface> fci(SkFontConfigInterface::RefGlobal()); |
| SkFontConfigInterface::FontIdentity fontIdentity; |
| fontIdentity.fID = fontconfigInterfaceId; |
| return fci->openStream(fontIdentity); |
| } |
| #endif |
| |
| namespace blink { |
| |
| static int toSkiaWeight(FontWeight weight) |
| { |
| switch (weight) { |
| case FontWeight100: |
| return SkFontStyle::kThin_Weight; |
| case FontWeight200: |
| return SkFontStyle::kExtraLight_Weight; |
| case FontWeight300: |
| return SkFontStyle::kLight_Weight; |
| case FontWeight400: |
| return SkFontStyle::kNormal_Weight; |
| case FontWeight500: |
| return SkFontStyle::kMedium_Weight; |
| case FontWeight600: |
| return SkFontStyle::kSemiBold_Weight; |
| case FontWeight700: |
| return SkFontStyle::kBold_Weight; |
| case FontWeight800: |
| return SkFontStyle::kExtraBold_Weight; |
| case FontWeight900: |
| return SkFontStyle::kBlack_Weight; |
| } |
| ASSERT_NOT_REACHED(); |
| return SkFontStyle::kNormal_Weight; |
| } |
| |
| static SkFontStyle::Slant toSkiaSlant(FontStyle style) |
| { |
| switch (style) { |
| case FontStyleNormal: |
| return SkFontStyle::kUpright_Slant; |
| case FontStyleItalic: |
| return SkFontStyle::kItalic_Slant; |
| } |
| ASSERT_NOT_REACHED(); |
| return SkFontStyle::kUpright_Slant; |
| } |
| |
| static int toSkiaWidth(FontStretch stretch) |
| { |
| // Numeric values matching OS/2 & Windows Metrics usWidthClass table. |
| // https://www.microsoft.com/typography/otspec/os2.htm |
| return static_cast<int>(stretch); |
| } |
| |
| static SkFontStyle toSkiaFontStyle(const FontDescription& fontDescription) |
| { |
| return SkFontStyle(toSkiaWeight(fontDescription.weight()), |
| toSkiaWidth(fontDescription.stretch()), |
| toSkiaSlant(fontDescription.style())); |
| } |
| |
| void FontCache::platformInit() |
| { |
| } |
| |
| PassRefPtr<SimpleFontData> FontCache::fallbackOnStandardFontStyle( |
| const FontDescription& fontDescription, UChar32 character) |
| { |
| FontDescription substituteDescription(fontDescription); |
| substituteDescription.setStyle(FontStyleNormal); |
| substituteDescription.setWeight(FontWeightNormal); |
| |
| FontFaceCreationParams creationParams(substituteDescription.family().family()); |
| FontPlatformData* substitutePlatformData = getFontPlatformData(substituteDescription, creationParams); |
| if (substitutePlatformData && substitutePlatformData->fontContainsCharacter(character)) { |
| FontPlatformData platformData = FontPlatformData(*substitutePlatformData); |
| platformData.setSyntheticBold(fontDescription.weight() >= FontWeight600); |
| platformData.setSyntheticItalic(fontDescription.style() == FontStyleItalic); |
| return fontDataFromFontPlatformData(&platformData, DoNotRetain); |
| } |
| |
| return nullptr; |
| } |
| |
| #if !OS(WIN) && !OS(ANDROID) |
| PassRefPtr<SimpleFontData> FontCache::fallbackFontForCharacter(const FontDescription& fontDescription, UChar32 c, const SimpleFontData*) |
| { |
| // First try the specified font with standard style & weight. |
| if (fontDescription.style() == FontStyleItalic |
| || fontDescription.weight() >= FontWeight600) { |
| RefPtr<SimpleFontData> fontData = fallbackOnStandardFontStyle( |
| fontDescription, c); |
| if (fontData) |
| return fontData; |
| } |
| |
| FontCache::PlatformFallbackFont fallbackFont; |
| FontCache::getFontForCharacter(c, "", &fallbackFont); |
| if (fallbackFont.name.isEmpty()) |
| return nullptr; |
| |
| FontFaceCreationParams creationParams; |
| creationParams = FontFaceCreationParams(fallbackFont.filename, fallbackFont.fontconfigInterfaceId, fallbackFont.ttcIndex); |
| |
| // Changes weight and/or italic of given FontDescription depends on |
| // the result of fontconfig so that keeping the correct font mapping |
| // of the given character. See http://crbug.com/32109 for details. |
| bool shouldSetSyntheticBold = false; |
| bool shouldSetSyntheticItalic = false; |
| FontDescription description(fontDescription); |
| if (fallbackFont.isBold && description.weight() < FontWeightBold) |
| description.setWeight(FontWeightBold); |
| if (!fallbackFont.isBold && description.weight() >= FontWeightBold) { |
| shouldSetSyntheticBold = true; |
| description.setWeight(FontWeightNormal); |
| } |
| if (fallbackFont.isItalic && description.style() == FontStyleNormal) |
| description.setStyle(FontStyleItalic); |
| if (!fallbackFont.isItalic && description.style() == FontStyleItalic) { |
| shouldSetSyntheticItalic = true; |
| description.setStyle(FontStyleNormal); |
| } |
| |
| FontPlatformData* substitutePlatformData = getFontPlatformData(description, creationParams); |
| if (!substitutePlatformData) |
| return nullptr; |
| FontPlatformData platformData = FontPlatformData(*substitutePlatformData); |
| platformData.setSyntheticBold(shouldSetSyntheticBold); |
| platformData.setSyntheticItalic(shouldSetSyntheticItalic); |
| return fontDataFromFontPlatformData(&platformData, DoNotRetain); |
| } |
| |
| #endif // !OS(WIN) && !OS(ANDROID) |
| |
| PassRefPtr<SimpleFontData> FontCache::getLastResortFallbackFont(const FontDescription& description, ShouldRetain shouldRetain) |
| { |
| const FontFaceCreationParams fallbackCreationParams(getFallbackFontFamily(description)); |
| const FontPlatformData* fontPlatformData = getFontPlatformData(description, fallbackCreationParams); |
| |
| // We should at least have Sans or Arial which is the last resort fallback of SkFontHost ports. |
| if (!fontPlatformData) { |
| DEFINE_STATIC_LOCAL(const FontFaceCreationParams, sansCreationParams, (AtomicString("Sans", AtomicString::ConstructFromLiteral))); |
| fontPlatformData = getFontPlatformData(description, sansCreationParams); |
| } |
| if (!fontPlatformData) { |
| DEFINE_STATIC_LOCAL(const FontFaceCreationParams, arialCreationParams, (AtomicString("Arial", AtomicString::ConstructFromLiteral))); |
| fontPlatformData = getFontPlatformData(description, arialCreationParams); |
| } |
| |
| ASSERT(fontPlatformData); |
| return fontDataFromFontPlatformData(fontPlatformData, shouldRetain); |
| } |
| |
| PassRefPtr<SkTypeface> FontCache::createTypeface(const FontDescription& fontDescription, const FontFaceCreationParams& creationParams, CString& name) |
| { |
| #if !OS(WIN) && !OS(ANDROID) && !OS(IOS) && !OS(MACOSX) |
| if (creationParams.creationType() == CreateFontByFciIdAndTtcIndex) { |
| // TODO(dro): crbug.com/381620 Use creationParams.ttcIndex() after |
| // https://code.google.com/p/skia/issues/detail?id=1186 gets fixed. |
| SkTypeface* typeface = nullptr; |
| if (Platform::current()->sandboxSupport()) |
| typeface = SkTypeface::CreateFromStream(streamForFontconfigInterfaceId(creationParams.fontconfigInterfaceId())); |
| else |
| typeface = SkTypeface::CreateFromFile(creationParams.filename().data()); |
| |
| if (typeface) |
| return adoptRef(typeface); |
| else |
| return nullptr; |
| } |
| #endif |
| |
| AtomicString family = creationParams.family(); |
| // If we're creating a fallback font (e.g. "-webkit-monospace"), convert the name into |
| // the fallback name (like "monospace") that fontconfig understands. |
| if (!family.length() || family.startsWith("-webkit-")) { |
| name = getFallbackFontFamily(fontDescription).string().utf8(); |
| } else { |
| // convert the name to utf8 |
| name = family.utf8(); |
| } |
| |
| SkFontStyle style = toSkiaFontStyle(fontDescription); |
| RefPtr<SkFontMgr> fm = adoptRef(SkFontMgr::RefDefault()); |
| RefPtr<SkTypeface> typeface = adoptRef(fm->matchFamilyStyle(name.data(), style)); |
| if (typeface) |
| return typeface.release(); |
| |
| int legacyStyle = SkTypeface::kNormal; |
| if (fontDescription.weight() >= FontWeight600) |
| legacyStyle |= SkTypeface::kBold; |
| if (fontDescription.style()) |
| legacyStyle |= SkTypeface::kItalic; |
| |
| // FIXME: Use fm, SkFontStyle and matchFamilyStyle instead of this legacy |
| // API. To make this work, we need to understand the extra fallback behavior |
| // in CreateFromName. |
| return adoptRef(SkTypeface::CreateFromName(name.data(), static_cast<SkTypeface::Style>(legacyStyle))); |
| } |
| |
| #if !OS(WIN) |
| FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const FontFaceCreationParams& creationParams, float fontSize) |
| { |
| CString name; |
| RefPtr<SkTypeface> tf(createTypeface(fontDescription, creationParams, name)); |
| if (!tf) |
| return 0; |
| |
| FontPlatformData* result = new FontPlatformData(tf, |
| name.data(), |
| fontSize, |
| (fontDescription.weight() >= FontWeight600 && !tf->isBold()) || fontDescription.isSyntheticBold(), |
| (fontDescription.style() && !tf->isItalic()) || fontDescription.isSyntheticItalic(), |
| fontDescription.orientation(), |
| fontDescription.useSubpixelPositioning()); |
| return result; |
| } |
| #endif // !OS(WIN) |
| |
| } // namespace blink |