FontFallbackList.h [plain text]
#ifndef FontFallbackList_h
#define FontFallbackList_h
#include "FontSelector.h"
#include "SimpleFontData.h"
#include <wtf/Forward.h>
#include <wtf/MainThread.h>
namespace WebCore {
class Font;
class GlyphPageTreeNode;
class GraphicsContext;
class IntRect;
class FontDescription;
class FontPlatformData;
class FontSelector;
const int cAllFamiliesScanned = -1;
class FontFallbackList : public RefCounted<FontFallbackList> {
public:
static PassRefPtr<FontFallbackList> create() { return adoptRef(new FontFallbackList()); }
~FontFallbackList() { releaseFontData(); }
void invalidate(PassRefPtr<FontSelector>);
bool isFixedPitch(const Font* f) const { if (m_pitch == UnknownPitch) determinePitch(f); return m_pitch == FixedPitch; };
void determinePitch(const Font*) const;
bool loadingCustomFonts() const { return m_loadingCustomFonts; }
FontSelector* fontSelector() const { return m_fontSelector.get(); }
unsigned fontSelectorVersion() const { return m_fontSelectorVersion; }
unsigned generation() const { return m_generation; }
struct GlyphPagesHashTraits : HashTraits<int> {
static const int minimumTableSize = 16;
};
typedef HashMap<int, GlyphPageTreeNode*, DefaultHash<int>::Hash, GlyphPagesHashTraits> GlyphPages;
GlyphPageTreeNode* glyphPageZero() const { return m_pageZero; }
const GlyphPages& glyphPages() const { return m_pages; }
private:
friend class SVGTextRunRenderingContext;
void setGlyphPageZero(GlyphPageTreeNode* pageZero) { m_pageZero = pageZero; }
void setGlyphPages(const GlyphPages& pages) { m_pages = pages; }
FontFallbackList();
const SimpleFontData* primarySimpleFontData(const Font* f)
{
ASSERT(isMainThread() || pthread_main_np());
if (!m_cachedPrimarySimpleFontData)
m_cachedPrimarySimpleFontData = primaryFontData(f)->fontDataForCharacter(' ');
return m_cachedPrimarySimpleFontData;
}
const FontData* primaryFontData(const Font* f) const { return fontDataAt(f, 0); }
const FontData* fontDataAt(const Font*, unsigned index) const;
void setPlatformFont(const FontPlatformData&);
void releaseFontData();
mutable Vector<pair<const FontData*, bool>, 1> m_fontList;
mutable GlyphPages m_pages;
mutable GlyphPageTreeNode* m_pageZero;
mutable const SimpleFontData* m_cachedPrimarySimpleFontData;
RefPtr<FontSelector> m_fontSelector;
unsigned m_fontSelectorVersion;
mutable int m_familyIndex;
unsigned short m_generation;
mutable unsigned m_pitch : 3; mutable bool m_loadingCustomFonts : 1;
friend class Font;
};
}
#endif