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/*
* Copyright (C) 2006, 2010, 2013 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef FontGlyphs_h
#define FontGlyphs_h
#include "FontSelector.h"
#include "SimpleFontData.h"
#include "WidthCache.h"
#include <wtf/Forward.h>
#include <wtf/MainThread.h>
namespace WebCore {
class GlyphPageTreeNode;
class GraphicsContext;
class IntRect;
class FontDescription;
class FontPlatformData;
class FontSelector;
const int cAllFamiliesScanned = -1;
class FontGlyphs : public RefCounted<FontGlyphs> {
WTF_MAKE_NONCOPYABLE(FontGlyphs);
public:
typedef HashMap<int, GlyphPageTreeNode*, DefaultHash<int>::Hash> GlyphPages;
class GlyphPagesStateSaver {
public:
GlyphPagesStateSaver(FontGlyphs& glyphs)
: m_glyphs(glyphs)
, m_pages(glyphs.m_pages)
, m_pageZero(glyphs.m_pageZero)
{
}
~GlyphPagesStateSaver()
{
m_glyphs.m_pages = m_pages;
m_glyphs.m_pageZero = m_pageZero;
}
private:
FontGlyphs& m_glyphs;
GlyphPages& m_pages;
GlyphPageTreeNode* m_pageZero;
};
static PassRefPtr<FontGlyphs> create(PassRefPtr<FontSelector> fontSelector) { return adoptRef(new FontGlyphs(fontSelector)); }
static PassRefPtr<FontGlyphs> createForPlatformFont(const FontPlatformData& platformData) { return adoptRef(new FontGlyphs(platformData)); }
~FontGlyphs() { releaseFontData(); }
bool isForPlatformFont() const { return m_isForPlatformFont; }
std::pair<GlyphData, GlyphPage*> glyphDataAndPageForCharacter(const FontDescription&, UChar32, bool mirror, FontDataVariant) const;
bool isFixedPitch(const FontDescription&) const;
void determinePitch(const FontDescription&) const;
bool loadingCustomFonts() const { return m_loadingCustomFonts; }
FontSelector* fontSelector() const { return m_fontSelector.get(); }
// FIXME: It should be possible to combine fontSelectorVersion and generation.
unsigned fontSelectorVersion() const { return m_fontSelectorVersion; }
unsigned generation() const { return m_generation; }
WidthCache& widthCache() const { return m_widthCache; }
const SimpleFontData* primarySimpleFontData(const FontDescription&) const;
const FontData* primaryFontData(const FontDescription& description) const { return realizeFontDataAt(description, 0); }
const FontData* realizeFontDataAt(const FontDescription&, unsigned index) const;
private:
FontGlyphs(PassRefPtr<FontSelector>);
FontGlyphs(const FontPlatformData&);
void releaseFontData();
mutable Vector<RefPtr<FontData>, 1> m_realizedFontData;
mutable GlyphPages m_pages;
mutable GlyphPageTreeNode* m_pageZero;
mutable const SimpleFontData* m_cachedPrimarySimpleFontData;
RefPtr<FontSelector> m_fontSelector;
mutable WidthCache m_widthCache;
unsigned m_fontSelectorVersion;
mutable int m_familyIndex;
unsigned short m_generation;
mutable unsigned m_pitch : 3; // Pitch
mutable bool m_loadingCustomFonts : 1;
bool m_isForPlatformFont : 1;
};
inline bool FontGlyphs::isFixedPitch(const FontDescription& description) const
{
if (m_pitch == UnknownPitch)
determinePitch(description);
return m_pitch == FixedPitch;
};
inline const SimpleFontData* FontGlyphs::primarySimpleFontData(const FontDescription& description) const
{
ASSERT(isMainThread());
if (!m_cachedPrimarySimpleFontData)
m_cachedPrimarySimpleFontData = primaryFontData(description)->fontDataForCharacter(' ');
return m_cachedPrimarySimpleFontData;
}
}
#endif
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