#ifndef FontCache_h
#define FontCache_h
#include "FontDescription.h"
#include "Timer.h"
#include <limits.h>
#include <wtf/Forward.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
#if PLATFORM(IOS)
#include <CoreText/CTFont.h>
#endif
#if OS(WINDOWS)
#include <windows.h>
#include <objidl.h>
#include <mlang.h>
#endif
namespace WebCore {
class FontCascade;
class FontPlatformData;
class FontSelector;
class OpenTypeVerticalData;
class Font;
#if PLATFORM(WIN)
#if USE(IMLANG_FONT_LINK2)
typedef IMLangFontLink2 IMLangFontLinkType;
#else
typedef IMLangFontLink IMLangFontLinkType;
#endif
#endif
struct FontDescriptionFontDataCacheKey {
explicit FontDescriptionFontDataCacheKey(unsigned size = 0)
: size(size)
, weight(0)
, flags(0)
{ }
FontDescriptionFontDataCacheKey(const FontDescription& description)
: size(description.computedPixelSize())
, weight(description.weight())
, flags(makeFlagKey(description))
{ }
static unsigned makeFlagKey(const FontDescription& description)
{
return static_cast<unsigned>(description.fontSynthesis()) << 6
| static_cast<unsigned>(description.widthVariant()) << 4
| static_cast<unsigned>(description.nonCJKGlyphOrientation()) << 3
| static_cast<unsigned>(description.orientation()) << 2
| static_cast<unsigned>(description.italic()) << 1
| static_cast<unsigned>(description.renderingMode());
}
bool operator==(const FontDescriptionFontDataCacheKey& other) const
{
return size == other.size && weight == other.weight && flags == other.flags;
}
bool operator!=(const FontDescriptionFontDataCacheKey& other) const
{
return !(*this == other);
}
inline unsigned computeHash() const
{
return StringHasher::hashMemory<sizeof(FontDescriptionFontDataCacheKey)>(this);
}
unsigned size;
unsigned weight;
unsigned flags;
};
class FontCache {
friend class WTF::NeverDestroyed<FontCache>;
WTF_MAKE_NONCOPYABLE(FontCache); WTF_MAKE_FAST_ALLOCATED;
public:
WEBCORE_EXPORT static FontCache& singleton();
RefPtr<Font> systemFallbackForCharacters(const FontDescription&, const Font* originalFontData, bool isPlatformFont, const UChar* characters, unsigned length);
void platformInit();
#if PLATFORM(IOS)
static float weightOfCTFont(CTFontRef);
#endif
#if PLATFORM(MAC)
WEBCORE_EXPORT static void setFontWhitelist(const Vector<String>&);
#endif
#if PLATFORM(WIN)
IMLangFontLinkType* getFontLinkInterface();
static void comInitialize();
static void comUninitialize();
static IMultiLanguage* getMultiLanguageInterface();
#endif
void getTraitsInFamily(const AtomicString&, Vector<unsigned>&);
WEBCORE_EXPORT RefPtr<Font> fontForFamily(const FontDescription&, const AtomicString&, bool checkingAlternateName = false);
WEBCORE_EXPORT Ref<Font> lastResortFallbackFont(const FontDescription&);
WEBCORE_EXPORT Ref<Font> fontForPlatformData(const FontPlatformData&);
RefPtr<Font> similarFont(const FontDescription&);
void addClient(FontSelector*);
void removeClient(FontSelector*);
unsigned short generation();
WEBCORE_EXPORT void invalidate();
WEBCORE_EXPORT size_t fontCount();
WEBCORE_EXPORT size_t inactiveFontCount();
WEBCORE_EXPORT void purgeInactiveFontData(unsigned count = UINT_MAX);
#if PLATFORM(WIN)
RefPtr<Font> fontFromDescriptionAndLogFont(const FontDescription&, const LOGFONT&, AtomicString& outFontFamilyName);
#endif
#if ENABLE(OPENTYPE_VERTICAL)
typedef AtomicString FontFileKey;
PassRefPtr<OpenTypeVerticalData> getVerticalData(const FontFileKey&, const FontPlatformData&);
#endif
private:
FontCache();
~FontCache() = delete;
void purgeTimerFired();
WEBCORE_EXPORT void purgeInactiveFontDataIfNeeded();
FontPlatformData* getCachedFontPlatformData(const FontDescription&, const AtomicString& family, bool checkingAlternateName = false);
#if PLATFORM(IOS)
FontPlatformData* getCustomFallbackFont(const UInt32, const FontDescription&);
PassRefPtr<Font> getSystemFontFallbackForCharacters(const FontDescription&, const Font*, const UChar* characters, unsigned length);
#endif
std::unique_ptr<FontPlatformData> createFontPlatformData(const FontDescription&, const AtomicString& family);
Timer m_purgeTimer;
#if PLATFORM(COCOA)
friend class ComplexTextController;
#endif
friend class Font;
};
}
#endif