| /* |
| * Copyright (C) 2014 Frederic Wang (fred.wang@free.fr). All rights reserved. |
| * Copyright (C) 2016 Igalia S.L. All rights reserved. |
| * |
| * 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
| * OWNER OR 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. |
| */ |
| |
| #pragma once |
| |
| #include "Glyph.h" |
| #include <wtf/Forward.h> |
| #include <wtf/Ref.h> |
| #include <wtf/RefCounted.h> |
| #include <wtf/RefPtr.h> |
| |
| #if !ENABLE(OPENTYPE_MATH) && USE(HARFBUZZ) |
| #include "HbUniquePtr.h" |
| #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 |
| |
| // These constants are defined in the MATH table. |
| // The implementation of OpenTypeMathData::getMathConstant assumes that they correspond to the indices of the MathContant table. |
| 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) |
| HbUniquePtr<hb_font_t> m_mathFont; |
| #endif |
| }; |
| |
| } // namespace WebCore |