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Diffstat (limited to 'Source/WebCore/platform/graphics/FontCache.h')
-rw-r--r-- | Source/WebCore/platform/graphics/FontCache.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/FontCache.h b/Source/WebCore/platform/graphics/FontCache.h new file mode 100644 index 0000000..e6845d9 --- /dev/null +++ b/Source/WebCore/platform/graphics/FontCache.h @@ -0,0 +1,117 @@ +/* + * Copyright (C) 2006, 2008 Apple Computer, Inc. All rights reserved. + * Copyright (C) 2007-2008 Torch Mobile, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. 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. + * 3. Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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. + */ + +#ifndef FontCache_h +#define FontCache_h + +#include <limits.h> +#include <wtf/Forward.h> +#include <wtf/Vector.h> +#include <wtf/unicode/Unicode.h> + +#if PLATFORM(WIN) +#include <objidl.h> +#include <mlang.h> +#endif + +namespace WebCore +{ + +class Font; +class FontPlatformData; +class FontData; +class FontDescription; +class FontSelector; +class SimpleFontData; + +class FontCache : public Noncopyable { +public: + friend FontCache* fontCache(); + + const FontData* getFontData(const Font&, int& familyIndex, FontSelector*); + void releaseFontData(const SimpleFontData*); + + // This method is implemented by the platform. + // FIXME: Font data returned by this method never go inactive because callers don't track and release them. + const SimpleFontData* getFontDataForCharacters(const Font&, const UChar* characters, int length); + + // Also implemented by the platform. + void platformInit(); + +#if OS(WINCE) && !PLATFORM(QT) +#if defined(IMLANG_FONT_LINK) && (IMLANG_FONT_LINK == 2) + IMLangFontLink2* getFontLinkInterface(); +#else + IMLangFontLink* getFontLinkInterface(); +#endif + static void comInitialize(); + static void comUninitialize(); + static IMultiLanguage* getMultiLanguageInterface(); +#elif PLATFORM(WIN) + IMLangFontLink2* getFontLinkInterface(); +#endif + + void getTraitsInFamily(const AtomicString&, Vector<unsigned>&); + + SimpleFontData* getCachedFontData(const FontDescription& fontDescription, const AtomicString& family, bool checkingAlternateName = false); + SimpleFontData* getLastResortFallbackFont(const FontDescription&); + + void addClient(FontSelector*); + void removeClient(FontSelector*); + + unsigned generation(); + void invalidate(); + + size_t fontDataCount(); + size_t inactiveFontDataCount(); + void purgeInactiveFontData(int count = INT_MAX); + +private: + FontCache(); + ~FontCache(); + + // FIXME: This method should eventually be removed. + FontPlatformData* getCachedFontPlatformData(const FontDescription&, const AtomicString& family, bool checkingAlternateName = false); + + // These methods are implemented by each platform. + SimpleFontData* getSimilarFontPlatformData(const Font&); + FontPlatformData* createFontPlatformData(const FontDescription&, const AtomicString& family); + + SimpleFontData* getCachedFontData(const FontPlatformData*); + + friend class SimpleFontData; // For getCachedFontData(const FontPlatformData*) + friend class FontFallbackList; +}; + +// Get the global fontCache. +FontCache* fontCache(); + +} + +#endif |