sky/engine/platform/fonts/FontPlatformData.h

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#ifndef SKY_ENGINE_PLATFORM_FONTS_FONTPLATFORMDATA_H_
#define SKY_ENGINE_PLATFORM_FONTS_FONTPLATFORMDATA_H_

#include "sky/engine/platform/SharedBuffer.h"
#include "sky/engine/platform/fonts/FontDescription.h"
#include "sky/engine/platform/fonts/FontOrientation.h"
#include "sky/engine/platform/fonts/FontRenderStyle.h"
#include "sky/engine/platform/fonts/opentype/OpenTypeVerticalData.h"
#include "sky/engine/wtf/Forward.h"
#include "sky/engine/wtf/HashTableDeletedValueType.h"
#include "sky/engine/wtf/RefPtr.h"
#include "sky/engine/wtf/text/CString.h"
#include "sky/engine/wtf/text/StringImpl.h"
#include "third_party/skia/include/core/SkPaint.h"

class SkTypeface;
typedef uint32_t SkFontID;

namespace blink {

class GraphicsContext;
class HarfBuzzFace;

class PLATFORM_EXPORT FontPlatformData {
public:
    // Used for deleted values in the font cache's hash tables. The hash table
    // will create us with this structure, and it will compare other values
    // to this "Deleted" one. It expects the Deleted one to be differentiable
    // from the 0 one (created with the empty constructor), so we can't just
    // set everything to 0.
    FontPlatformData(WTF::HashTableDeletedValueType);
    FontPlatformData();
    FontPlatformData(float textSize, bool syntheticBold, bool syntheticItalic);
    FontPlatformData(const FontPlatformData&);
    FontPlatformData(PassRefPtr<SkTypeface>, const char* name, float textSize, bool syntheticBold, bool syntheticItalic, FontOrientation = Horizontal, bool subpixelTextPosition = defaultUseSubpixelPositioning());
    FontPlatformData(const FontPlatformData& src, float textSize);
    ~FontPlatformData();

    String fontFamilyName() const;
    float size() const { return m_textSize; }
    bool isFixedPitch() const;

    SkTypeface* typeface() const { return m_typeface.get(); }
    HarfBuzzFace* harfBuzzFace() const;
    SkFontID uniqueID() const;
    unsigned hash() const;

    FontOrientation orientation() const { return m_orientation; }
    void setOrientation(FontOrientation orientation) { m_orientation = orientation; }
    void setSyntheticBold(bool syntheticBold) { m_syntheticBold = syntheticBold; }
    void setSyntheticItalic(bool syntheticItalic) { m_syntheticItalic = syntheticItalic; }
    bool operator==(const FontPlatformData&) const;
    FontPlatformData& operator=(const FontPlatformData&);
    bool isHashTableDeletedValue() const { return m_isHashTableDeletedValue; }
    bool fontContainsCharacter(UChar32 character);

#if ENABLE(OPENTYPE_VERTICAL)
    PassRefPtr<OpenTypeVerticalData> verticalData() const;
    PassRefPtr<SharedBuffer> openTypeTable(uint32_t table) const;
#endif

#ifndef NDEBUG
    String description() const;
#endif

    // The returned styles are all actual styles without FontRenderStyle::NoPreference.
    const FontRenderStyle& fontRenderStyle() const { return m_style; }
    void setupPaint(SkPaint*, GraphicsContext* = 0) const;

    static void setHinting(SkPaint::Hinting);
    static void setAutoHint(bool);
    static void setUseBitmaps(bool);
    static void setAntiAlias(bool);
    static void setSubpixelRendering(bool);

private:
    bool static defaultUseSubpixelPositioning();
    void querySystemForRenderStyle(bool useSkiaSubpixelPositioning);

    RefPtr<SkTypeface> m_typeface;
    CString m_family;
    float m_textSize;
    bool m_syntheticBold;
    bool m_syntheticItalic;
    FontOrientation m_orientation;
    FontRenderStyle m_style;
    mutable RefPtr<HarfBuzzFace> m_harfBuzzFace;
    bool m_isHashTableDeletedValue;
};

} // namespace blink

#endif  // SKY_ENGINE_PLATFORM_FONTS_FONTPLATFORMDATA_H_