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/*
* 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.
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* 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
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if !OS(WIN) && !OS(ANDROID)
#include "SkFontConfigInterface.h"
#endif
#include "SkFontMgr.h"
#include "SkStream.h"
#include "SkTypeface.h"
#include "platform/NotImplemented.h"
#include "platform/fonts/AlternateFontFamily.h"
#include "platform/fonts/FontCache.h"
#include "platform/fonts/FontDescription.h"
#include "platform/fonts/FontFaceCreationParams.h"
#include "platform/fonts/SimpleFontData.h"
#include "public/platform/Platform.h"
#include "public/platform/linux/WebSandboxSupport.h"
#include "wtf/Assertions.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/CString.h"
#include <unicode/locid.h>
#if !OS(WIN) && !OS(ANDROID)
static SkStream* streamForFontconfigInterfaceId(int fontconfigInterfaceId)
{
SkAutoTUnref<SkFontConfigInterface> fci(SkFontConfigInterface::RefGlobal());
SkFontConfigInterface::FontIdentity fontIdentity;
fontIdentity.fID = fontconfigInterfaceId;
return fci->openStream(fontIdentity);
}
#endif
namespace blink {
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);
}
#if OS(WIN)
// Try some more Windows-specific fallbacks.
if (!fontPlatformData) {
DEFINE_STATIC_LOCAL(const FontFaceCreationParams, msuigothicCreationParams, (AtomicString("MS UI Gothic", AtomicString::ConstructFromLiteral)));
fontPlatformData = getFontPlatformData(description, msuigothicCreationParams);
}
if (!fontPlatformData) {
DEFINE_STATIC_LOCAL(const FontFaceCreationParams, mssansserifCreationParams, (AtomicString("Microsoft Sans Serif", AtomicString::ConstructFromLiteral)));
fontPlatformData = getFontPlatformData(description, mssansserifCreationParams);
}
#endif
ASSERT(fontPlatformData);
return fontDataFromFontPlatformData(fontPlatformData, shouldRetain);
}
#if OS(WIN)
static inline SkFontStyle fontStyle(const FontDescription& fontDescription)
{
int width = static_cast<int>(fontDescription.stretch());
int weight = (fontDescription.weight() - FontWeight100 + 1) * 100;
SkFontStyle::Slant slant = fontDescription.style() == FontStyleItalic
? SkFontStyle::kItalic_Slant
: SkFontStyle::kUpright_Slant;
return SkFontStyle(weight, width, slant);
}
COMPILE_ASSERT(FontStretchUltraCondensed == SkFontStyle::kUltraCondensed_Width,
FontStretchUltraCondensedMapsTokUltraCondensed_Width);
COMPILE_ASSERT(FontStretchNormal == SkFontStyle::kNormal_Width,
FontStretchNormalMapsTokNormal_Width);
COMPILE_ASSERT(FontStretchUltraExpanded == SkFontStyle::kUltaExpanded_Width,
FontStretchUltraExpandedMapsTokUltaExpanded_Width);
#endif
PassRefPtr<SkTypeface> FontCache::createTypeface(const FontDescription& fontDescription, const FontFaceCreationParams& creationParams, CString& name)
{
#if !OS(WIN) && !OS(ANDROID)
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();
}
int style = SkTypeface::kNormal;
if (fontDescription.weight() >= FontWeight600)
style |= SkTypeface::kBold;
if (fontDescription.style())
style |= SkTypeface::kItalic;
#if OS(WIN)
if (s_sideloadedFonts) {
HashMap<String, SkTypeface*>::iterator sideloadedFont =
s_sideloadedFonts->find(name.data());
if (sideloadedFont != s_sideloadedFonts->end())
return adoptRef(sideloadedFont->value);
}
if (m_fontManager) {
return adoptRef(useDirectWrite()
? m_fontManager->matchFamilyStyle(name.data(), fontStyle(fontDescription))
: m_fontManager->legacyCreateTypeface(name.data(), style)
);
}
#endif
// FIXME: Use m_fontManager, SkFontStyle and matchFamilyStyle instead of
// CreateFromName on all platforms.
return adoptRef(SkTypeface::CreateFromName(name.data(), static_cast<SkTypeface::Style>(style)));
}
#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