Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/FontCache.h

-/*
- * 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/PassRefPtr.h"
-#include "wtf/RefPtr.h"
-#include "wtf/Vector.h"
-#include "wtf/text/CString.h"
-#include "wtf/text/WTFString.h"
-#include "wtf/unicode/Unicode.h"
-
-#if OS(WIN)
-#include <windows.h>
-#include <objidl.h>
-#include <mlang.h>
-#endif
-
-#if OS(WIN) && !ENABLE(GDI_FONTS_ON_WINDOWS)
-#include "SkFontMgr.h"
-#endif
-
-class SkTypeface;
-
-namespace WebCore {
-
-class FontPlatformData;
-class FontData;
-class FontDescription;
-class FontSelector;
-class OpenTypeVerticalData;
-class SimpleFontData;
-
-enum ShouldRetain { Retain, DoNotRetain };
-enum PurgeSeverity { PurgeIfNeeded, ForcePurge };
-
-class FontCache {
-    friend class FontCachePurgePreventer;
-
-    WTF_MAKE_NONCOPYABLE(FontCache); WTF_MAKE_FAST_ALLOCATED;
-public:
-    friend FontCache* fontCache();
-
-    void releaseFontData(const SimpleFontData*);
-
-    // This method is implemented by the plaform and used by
-    // FontFastPath to lookup the font for a given character.
-    PassRefPtr<SimpleFontData> platformFallbackForCharacter(const FontDescription&, UChar32, const SimpleFontData* fontDataToSubstitute, bool disallowSynthetics);
-
-    // Also implemented by the platform.
-    void platformInit();
-
-    PassRefPtr<SimpleFontData> getFontData(const FontDescription&, const AtomicString&, bool checkingAlternateName = false, ShouldRetain = Retain);
-    PassRefPtr<SimpleFontData> getLastResortFallbackFont(const FontDescription&, ShouldRetain = Retain);
-    SimpleFontData* getNonRetainedLastResortFallbackFont(const FontDescription&);
-    bool isPlatformFontAvailable(const FontDescription&, const AtomicString&);
-
-    void addClient(FontSelector*);
-    void removeClient(FontSelector*);
-
-    unsigned short generation();
-    void invalidate();
-
-#if OS(WIN)
-    PassRefPtr<SimpleFontData> fontDataFromDescriptionAndLogFont(const FontDescription&, ShouldRetain, const LOGFONT&, wchar_t* outFontFamilyName);
-#endif
-
-#if ENABLE(OPENTYPE_VERTICAL)
-    typedef uint32_t FontFileKey;
-    PassRefPtr<OpenTypeVerticalData> getVerticalData(const FontFileKey&, const FontPlatformData&);
-#endif
-
-#if OS(ANDROID)
-    static AtomicString getGenericFamilyNameForScript(const AtomicString& familyName, UScriptCode);
-#else
-    struct SimpleFontFamily {
-        String name;
-        bool isBold;
-        bool isItalic;
-    };
-    static void getFontFamilyForCharacter(UChar32, const char* preferredLocale, SimpleFontFamily*);
-#endif
-
-private:
-    FontCache();
-    ~FontCache();
-
-    void purge(PurgeSeverity = PurgeIfNeeded);
-
-    void disablePurging() { m_purgePreventCount++; }
-    void enablePurging()
-    {
-        ASSERT(m_purgePreventCount);
-        if (!--m_purgePreventCount)
-            purge(PurgeIfNeeded);
-    }
-
-    // FIXME: This method should eventually be removed.
-    FontPlatformData* getFontPlatformData(const FontDescription&, const AtomicString& family, bool checkingAlternateName = false);
-
-    // These methods are implemented by each platform.
-    FontPlatformData* createFontPlatformData(const FontDescription&, const AtomicString& family, float fontSize);
-
-    // Implemented on skia platforms.
-    PassRefPtr<SkTypeface> createTypeface(const FontDescription&, const AtomicString& family, CString& name);
-
-    PassRefPtr<SimpleFontData> fontDataFromFontPlatformData(const FontPlatformData*, ShouldRetain = Retain);
-
-    // Don't purge if this count is > 0;
-    int m_purgePreventCount;
-
-#if OS(WIN) && !ENABLE(GDI_FONTS_ON_WINDOWS)
-    OwnPtr<SkFontMgr> m_fontManager;
-    bool m_useSubpixelPositioning;
-#endif
-
-#if OS(MACOSX) || OS(ANDROID)
-    friend class ComplexTextController;
-#endif
-    friend class SimpleFontData; // For fontDataFromFontPlatformData
-    friend class FontFallbackList;
-};
-
-// Get the global fontCache.
-FontCache* fontCache();
-
-class FontCachePurgePreventer {
-public:
-    FontCachePurgePreventer() { fontCache()->disablePurging(); }
-    ~FontCachePurgePreventer() { fontCache()->enablePurging(); }
-};
-
-}
-
-#endif