OpenTypeMathData.h [plain text]
#pragma once
#include "Glyph.h"
#include <wtf/Ref.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
#if !ENABLE(OPENTYPE_MATH) && USE(HARFBUZZ)
#include <hb-ot.h>
#endif
namespace WebCore {
class FontPlatformData;
class SharedBuffer;
class Font;
class OpenTypeMathData : public RefCounted<OpenTypeMathData> {
public:
static Ref<OpenTypeMathData> create(const FontPlatformData& font)
{
return adoptRef(*new OpenTypeMathData(font));
}
~OpenTypeMathData();
#if ENABLE(OPENTYPE_MATH)
bool hasMathData() const { return m_mathBuffer; }
#elif USE(HARFBUZZ)
bool hasMathData() const { return m_mathFont.get(); }
#else
bool hasMathData() const { return false; }
#endif
enum MathConstant {
ScriptPercentScaleDown,
ScriptScriptPercentScaleDown,
DelimitedSubFormulaMinHeight,
DisplayOperatorMinHeight,
MathLeading,
AxisHeight,
AccentBaseHeight,
FlattenedAccentBaseHeight,
SubscriptShiftDown,
SubscriptTopMax,
SubscriptBaselineDropMin,
SuperscriptShiftUp,
SuperscriptShiftUpCramped,
SuperscriptBottomMin,
SuperscriptBaselineDropMax,
SubSuperscriptGapMin,
SuperscriptBottomMaxWithSubscript,
SpaceAfterScript,
UpperLimitGapMin,
UpperLimitBaselineRiseMin,
LowerLimitGapMin,
LowerLimitBaselineDropMin,
StackTopShiftUp,
StackTopDisplayStyleShiftUp,
StackBottomShiftDown,
StackBottomDisplayStyleShiftDown,
StackGapMin,
StackDisplayStyleGapMin,
StretchStackTopShiftUp,
StretchStackBottomShiftDown,
StretchStackGapAboveMin,
StretchStackGapBelowMin,
FractionNumeratorShiftUp,
FractionNumeratorDisplayStyleShiftUp,
FractionDenominatorShiftDown,
FractionDenominatorDisplayStyleShiftDown,
FractionNumeratorGapMin,
FractionNumDisplayStyleGapMin,
FractionRuleThickness,
FractionDenominatorGapMin,
FractionDenomDisplayStyleGapMin,
SkewedFractionHorizontalGap,
SkewedFractionVerticalGap,
OverbarVerticalGap,
OverbarRuleThickness,
OverbarExtraAscender,
UnderbarVerticalGap,
UnderbarRuleThickness,
UnderbarExtraDescender,
RadicalVerticalGap,
RadicalDisplayStyleVerticalGap,
RadicalRuleThickness,
RadicalExtraAscender,
RadicalKernBeforeDegree,
RadicalKernAfterDegree,
RadicalDegreeBottomRaisePercent
};
struct AssemblyPart {
Glyph glyph;
bool isExtender;
};
float getMathConstant(const Font&, MathConstant) const;
float getItalicCorrection(const Font&, Glyph) const;
void getMathVariants(Glyph, bool isVertical, Vector<Glyph>& sizeVariants, Vector<AssemblyPart>& assemblyParts) const;
private:
explicit OpenTypeMathData(const FontPlatformData&);
#if ENABLE(OPENTYPE_MATH)
RefPtr<SharedBuffer> m_mathBuffer;
#elif USE(HARFBUZZ)
struct HbFontDeleter {
void operator()(hb_font_t* font)
{
hb_font_destroy(font);
}
};
std::unique_ptr<hb_font_t, HbFontDeleter> m_mathFont;
#endif
};
}