package harfbuzzimport ( "fmt" "github.com/go-text/typesetting/font" ot "github.com/go-text/typesetting/font/opentype" "github.com/go-text/typesetting/font/opentype/tables" )type aatLayoutFeatureType = uint16 const ( aatLayoutFeatureTypeLigatures = 1 aatLayoutFeatureTypeLetterCase = 3 aatLayoutFeatureTypeVerticalSubstitution = 4 aatLayoutFeatureTypeNumberSpacing = 6 aatLayoutFeatureTypeVerticalPosition = 10 aatLayoutFeatureTypeFractions = 11 aatLayoutFeatureTypeTypographicExtras = 14 aatLayoutFeatureTypeMathematicalExtras = 15 aatLayoutFeatureTypeCharacterAlternatives = 17 aatLayoutFeatureTypeStyleOptions = 19 aatLayoutFeatureTypeCharacterShape = 20 aatLayoutFeatureTypeNumberCase = 21 aatLayoutFeatureTypeTextSpacing = 22 aatLayoutFeatureTypeTransliteration = 23 aatLayoutFeatureTypeRubyKana = 28 aatLayoutFeatureTypeItalicCjkRoman = 32 aatLayoutFeatureTypeCaseSensitiveLayout = 33 aatLayoutFeatureTypeAlternateKana = 34 aatLayoutFeatureTypeStylisticAlternatives = 35 aatLayoutFeatureTypeContextualAlternatives = 36 aatLayoutFeatureTypeLowerCase = 37 aatLayoutFeatureTypeUpperCase = 38 aatLayoutFeatureTypeLanguageTagType = 39 )type aatLayoutFeatureSelector = uint16 const ( aatLayoutFeatureSelectorRequiredLigaturesOn = 0 aatLayoutFeatureSelectorRequiredLigaturesOff = 1 aatLayoutFeatureSelectorCommonLigaturesOn = 2 aatLayoutFeatureSelectorCommonLigaturesOff = 3 aatLayoutFeatureSelectorRareLigaturesOn = 4 aatLayoutFeatureSelectorRareLigaturesOff = 5 aatLayoutFeatureSelectorContextualLigaturesOn = 18 aatLayoutFeatureSelectorContextualLigaturesOff = 19 aatLayoutFeatureSelectorHistoricalLigaturesOn = 20 aatLayoutFeatureSelectorHistoricalLigaturesOff = 21 aatLayoutFeatureSelectorSmallCaps = 3 aatLayoutFeatureSelectorSubstituteVerticalFormsOn = 0 aatLayoutFeatureSelectorSubstituteVerticalFormsOff = 1 aatLayoutFeatureSelectorMonospacedNumbers = 0 aatLayoutFeatureSelectorProportionalNumbers = 1 aatLayoutFeatureSelectorNormalPosition = 0 aatLayoutFeatureSelectorSuperiors = 1 aatLayoutFeatureSelectorInferiors = 2 aatLayoutFeatureSelectorOrdinals = 3 aatLayoutFeatureSelectorScientificInferiors = 4 aatLayoutFeatureSelectorNoFractions = 0 aatLayoutFeatureSelectorVerticalFractions = 1 aatLayoutFeatureSelectorDiagonalFractions = 2 aatLayoutFeatureSelectorSlashedZeroOn = 4 aatLayoutFeatureSelectorSlashedZeroOff = 5 aatLayoutFeatureSelectorMathematicalGreekOn = 10 aatLayoutFeatureSelectorMathematicalGreekOff = 11 aatLayoutFeatureSelectorNoStyleOptions = 0 aatLayoutFeatureSelectorTitlingCaps = 4 aatLayoutFeatureSelectorTraditionalCharacters = 0 aatLayoutFeatureSelectorSimplifiedCharacters = 1 aatLayoutFeatureSelectorJis1978Characters = 2 aatLayoutFeatureSelectorJis1983Characters = 3 aatLayoutFeatureSelectorJis1990Characters = 4 aatLayoutFeatureSelectorExpertCharacters = 10 aatLayoutFeatureSelectorJis2004Characters = 11 aatLayoutFeatureSelectorHojoCharacters = 12 aatLayoutFeatureSelectorNlccharacters = 13 aatLayoutFeatureSelectorTraditionalNamesCharacters = 14 aatLayoutFeatureSelectorLowerCaseNumbers = 0 aatLayoutFeatureSelectorUpperCaseNumbers = 1 aatLayoutFeatureSelectorProportionalText = 0 aatLayoutFeatureSelectorMonospacedText = 1 aatLayoutFeatureSelectorHalfWidthText = 2 aatLayoutFeatureSelectorThirdWidthText = 3 aatLayoutFeatureSelectorQuarterWidthText = 4 aatLayoutFeatureSelectorAltProportionalText = 5 aatLayoutFeatureSelectorAltHalfWidthText = 6 aatLayoutFeatureSelectorNoTransliteration = 0 aatLayoutFeatureSelectorHanjaToHangul = 1 aatLayoutFeatureSelectorRubyKanaOn = 2 aatLayoutFeatureSelectorRubyKanaOff = 3 aatLayoutFeatureSelectorCjkItalicRomanOn = 2 aatLayoutFeatureSelectorCjkItalicRomanOff = 3 aatLayoutFeatureSelectorCaseSensitiveLayoutOn = 0 aatLayoutFeatureSelectorCaseSensitiveLayoutOff = 1 aatLayoutFeatureSelectorCaseSensitiveSpacingOn = 2 aatLayoutFeatureSelectorCaseSensitiveSpacingOff = 3 aatLayoutFeatureSelectorAlternateHorizKanaOn = 0 aatLayoutFeatureSelectorAlternateHorizKanaOff = 1 aatLayoutFeatureSelectorAlternateVertKanaOn = 2 aatLayoutFeatureSelectorAlternateVertKanaOff = 3 aatLayoutFeatureSelectorStylisticAltOneOn = 2 aatLayoutFeatureSelectorStylisticAltOneOff = 3 aatLayoutFeatureSelectorStylisticAltTwoOn = 4 aatLayoutFeatureSelectorStylisticAltTwoOff = 5 aatLayoutFeatureSelectorStylisticAltThreeOn = 6 aatLayoutFeatureSelectorStylisticAltThreeOff = 7 aatLayoutFeatureSelectorStylisticAltFourOn = 8 aatLayoutFeatureSelectorStylisticAltFourOff = 9 aatLayoutFeatureSelectorStylisticAltFiveOn = 10 aatLayoutFeatureSelectorStylisticAltFiveOff = 11 aatLayoutFeatureSelectorStylisticAltSixOn = 12 aatLayoutFeatureSelectorStylisticAltSixOff = 13 aatLayoutFeatureSelectorStylisticAltSevenOn = 14 aatLayoutFeatureSelectorStylisticAltSevenOff = 15 aatLayoutFeatureSelectorStylisticAltEightOn = 16 aatLayoutFeatureSelectorStylisticAltEightOff = 17 aatLayoutFeatureSelectorStylisticAltNineOn = 18 aatLayoutFeatureSelectorStylisticAltNineOff = 19 aatLayoutFeatureSelectorStylisticAltTenOn = 20 aatLayoutFeatureSelectorStylisticAltTenOff = 21 aatLayoutFeatureSelectorStylisticAltElevenOn = 22 aatLayoutFeatureSelectorStylisticAltElevenOff = 23 aatLayoutFeatureSelectorStylisticAltTwelveOn = 24 aatLayoutFeatureSelectorStylisticAltTwelveOff = 25 aatLayoutFeatureSelectorStylisticAltThirteenOn = 26 aatLayoutFeatureSelectorStylisticAltThirteenOff = 27 aatLayoutFeatureSelectorStylisticAltFourteenOn = 28 aatLayoutFeatureSelectorStylisticAltFourteenOff = 29 aatLayoutFeatureSelectorStylisticAltFifteenOn = 30 aatLayoutFeatureSelectorStylisticAltFifteenOff = 31 aatLayoutFeatureSelectorStylisticAltSixteenOn = 32 aatLayoutFeatureSelectorStylisticAltSixteenOff = 33 aatLayoutFeatureSelectorStylisticAltSeventeenOn = 34 aatLayoutFeatureSelectorStylisticAltSeventeenOff = 35 aatLayoutFeatureSelectorStylisticAltEighteenOn = 36 aatLayoutFeatureSelectorStylisticAltEighteenOff = 37 aatLayoutFeatureSelectorStylisticAltNineteenOn = 38 aatLayoutFeatureSelectorStylisticAltNineteenOff = 39 aatLayoutFeatureSelectorStylisticAltTwentyOn = 40 aatLayoutFeatureSelectorStylisticAltTwentyOff = 41 aatLayoutFeatureSelectorContextualAlternatesOn = 0 aatLayoutFeatureSelectorContextualAlternatesOff = 1 aatLayoutFeatureSelectorSwashAlternatesOn = 2 aatLayoutFeatureSelectorSwashAlternatesOff = 3 aatLayoutFeatureSelectorContextualSwashAlternatesOn = 4 aatLayoutFeatureSelectorContextualSwashAlternatesOff = 5 aatLayoutFeatureSelectorDefaultLowerCase = 0 aatLayoutFeatureSelectorLowerCaseSmallCaps = 1 aatLayoutFeatureSelectorLowerCasePetiteCaps = 2 aatLayoutFeatureSelectorDefaultUpperCase = 0 aatLayoutFeatureSelectorUpperCaseSmallCaps = 1 aatLayoutFeatureSelectorUpperCasePetiteCaps = 2 )var featureMappings = [...]aatFeatureMapping { {ot .NewTag ('a' , 'f' , 'r' , 'c' ), aatLayoutFeatureTypeFractions , aatLayoutFeatureSelectorVerticalFractions , aatLayoutFeatureSelectorNoFractions }, {ot .NewTag ('c' , '2' , 'p' , 'c' ), aatLayoutFeatureTypeUpperCase , aatLayoutFeatureSelectorUpperCasePetiteCaps , aatLayoutFeatureSelectorDefaultUpperCase }, {ot .NewTag ('c' , '2' , 's' , 'c' ), aatLayoutFeatureTypeUpperCase , aatLayoutFeatureSelectorUpperCaseSmallCaps , aatLayoutFeatureSelectorDefaultUpperCase }, {ot .NewTag ('c' , 'a' , 'l' , 't' ), aatLayoutFeatureTypeContextualAlternatives , aatLayoutFeatureSelectorContextualAlternatesOn , aatLayoutFeatureSelectorContextualAlternatesOff }, {ot .NewTag ('c' , 'a' , 's' , 'e' ), aatLayoutFeatureTypeCaseSensitiveLayout , aatLayoutFeatureSelectorCaseSensitiveLayoutOn , aatLayoutFeatureSelectorCaseSensitiveLayoutOff }, {ot .NewTag ('c' , 'l' , 'i' , 'g' ), aatLayoutFeatureTypeLigatures , aatLayoutFeatureSelectorContextualLigaturesOn , aatLayoutFeatureSelectorContextualLigaturesOff }, {ot .NewTag ('c' , 'p' , 's' , 'p' ), aatLayoutFeatureTypeCaseSensitiveLayout , aatLayoutFeatureSelectorCaseSensitiveSpacingOn , aatLayoutFeatureSelectorCaseSensitiveSpacingOff }, {ot .NewTag ('c' , 's' , 'w' , 'h' ), aatLayoutFeatureTypeContextualAlternatives , aatLayoutFeatureSelectorContextualSwashAlternatesOn , aatLayoutFeatureSelectorContextualSwashAlternatesOff }, {ot .NewTag ('d' , 'l' , 'i' , 'g' ), aatLayoutFeatureTypeLigatures , aatLayoutFeatureSelectorRareLigaturesOn , aatLayoutFeatureSelectorRareLigaturesOff }, {ot .NewTag ('e' , 'x' , 'p' , 't' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorExpertCharacters , 16 }, {ot .NewTag ('f' , 'r' , 'a' , 'c' ), aatLayoutFeatureTypeFractions , aatLayoutFeatureSelectorDiagonalFractions , aatLayoutFeatureSelectorNoFractions }, {ot .NewTag ('f' , 'w' , 'i' , 'd' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorMonospacedText , 7 }, {ot .NewTag ('h' , 'a' , 'l' , 't' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorAltHalfWidthText , 7 }, {ot .NewTag ('h' , 'i' , 's' , 't' ), 40 , 0 , 1 }, {ot .NewTag ('h' , 'k' , 'n' , 'a' ), aatLayoutFeatureTypeAlternateKana , aatLayoutFeatureSelectorAlternateHorizKanaOn , aatLayoutFeatureSelectorAlternateHorizKanaOff }, {ot .NewTag ('h' , 'l' , 'i' , 'g' ), aatLayoutFeatureTypeLigatures , aatLayoutFeatureSelectorHistoricalLigaturesOn , aatLayoutFeatureSelectorHistoricalLigaturesOff }, {ot .NewTag ('h' , 'n' , 'g' , 'l' ), aatLayoutFeatureTypeTransliteration , aatLayoutFeatureSelectorHanjaToHangul , aatLayoutFeatureSelectorNoTransliteration }, {ot .NewTag ('h' , 'o' , 'j' , 'o' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorHojoCharacters , 16 }, {ot .NewTag ('h' , 'w' , 'i' , 'd' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorHalfWidthText , 7 }, {ot .NewTag ('i' , 't' , 'a' , 'l' ), aatLayoutFeatureTypeItalicCjkRoman , aatLayoutFeatureSelectorCjkItalicRomanOn , aatLayoutFeatureSelectorCjkItalicRomanOff }, {ot .NewTag ('j' , 'p' , '0' , '4' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorJis2004Characters , 16 }, {ot .NewTag ('j' , 'p' , '7' , '8' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorJis1978Characters , 16 }, {ot .NewTag ('j' , 'p' , '8' , '3' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorJis1983Characters , 16 }, {ot .NewTag ('j' , 'p' , '9' , '0' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorJis1990Characters , 16 }, {ot .NewTag ('l' , 'i' , 'g' , 'a' ), aatLayoutFeatureTypeLigatures , aatLayoutFeatureSelectorCommonLigaturesOn , aatLayoutFeatureSelectorCommonLigaturesOff }, {ot .NewTag ('l' , 'n' , 'u' , 'm' ), aatLayoutFeatureTypeNumberCase , aatLayoutFeatureSelectorUpperCaseNumbers , 2 }, {ot .NewTag ('m' , 'g' , 'r' , 'k' ), aatLayoutFeatureTypeMathematicalExtras , aatLayoutFeatureSelectorMathematicalGreekOn , aatLayoutFeatureSelectorMathematicalGreekOff }, {ot .NewTag ('n' , 'l' , 'c' , 'k' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorNlccharacters , 16 }, {ot .NewTag ('o' , 'n' , 'u' , 'm' ), aatLayoutFeatureTypeNumberCase , aatLayoutFeatureSelectorLowerCaseNumbers , 2 }, {ot .NewTag ('o' , 'r' , 'd' , 'n' ), aatLayoutFeatureTypeVerticalPosition , aatLayoutFeatureSelectorOrdinals , aatLayoutFeatureSelectorNormalPosition }, {ot .NewTag ('p' , 'a' , 'l' , 't' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorAltProportionalText , 7 }, {ot .NewTag ('p' , 'c' , 'a' , 'p' ), aatLayoutFeatureTypeLowerCase , aatLayoutFeatureSelectorLowerCasePetiteCaps , aatLayoutFeatureSelectorDefaultLowerCase }, {ot .NewTag ('p' , 'k' , 'n' , 'a' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorProportionalText , 7 }, {ot .NewTag ('p' , 'n' , 'u' , 'm' ), aatLayoutFeatureTypeNumberSpacing , aatLayoutFeatureSelectorProportionalNumbers , 4 }, {ot .NewTag ('p' , 'w' , 'i' , 'd' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorProportionalText , 7 }, {ot .NewTag ('q' , 'w' , 'i' , 'd' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorQuarterWidthText , 7 }, {ot .NewTag ('r' , 'l' , 'i' , 'g' ), aatLayoutFeatureTypeLigatures , aatLayoutFeatureSelectorRequiredLigaturesOn , aatLayoutFeatureSelectorRequiredLigaturesOff }, {ot .NewTag ('r' , 'u' , 'b' , 'y' ), aatLayoutFeatureTypeRubyKana , aatLayoutFeatureSelectorRubyKanaOn , aatLayoutFeatureSelectorRubyKanaOff }, {ot .NewTag ('s' , 'i' , 'n' , 'f' ), aatLayoutFeatureTypeVerticalPosition , aatLayoutFeatureSelectorScientificInferiors , aatLayoutFeatureSelectorNormalPosition }, {ot .NewTag ('s' , 'm' , 'c' , 'p' ), aatLayoutFeatureTypeLowerCase , aatLayoutFeatureSelectorLowerCaseSmallCaps , aatLayoutFeatureSelectorDefaultLowerCase }, {ot .NewTag ('s' , 'm' , 'p' , 'l' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorSimplifiedCharacters , 16 }, {ot .NewTag ('s' , 's' , '0' , '1' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltOneOn , aatLayoutFeatureSelectorStylisticAltOneOff }, {ot .NewTag ('s' , 's' , '0' , '2' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltTwoOn , aatLayoutFeatureSelectorStylisticAltTwoOff }, {ot .NewTag ('s' , 's' , '0' , '3' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltThreeOn , aatLayoutFeatureSelectorStylisticAltThreeOff }, {ot .NewTag ('s' , 's' , '0' , '4' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltFourOn , aatLayoutFeatureSelectorStylisticAltFourOff }, {ot .NewTag ('s' , 's' , '0' , '5' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltFiveOn , aatLayoutFeatureSelectorStylisticAltFiveOff }, {ot .NewTag ('s' , 's' , '0' , '6' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltSixOn , aatLayoutFeatureSelectorStylisticAltSixOff }, {ot .NewTag ('s' , 's' , '0' , '7' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltSevenOn , aatLayoutFeatureSelectorStylisticAltSevenOff }, {ot .NewTag ('s' , 's' , '0' , '8' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltEightOn , aatLayoutFeatureSelectorStylisticAltEightOff }, {ot .NewTag ('s' , 's' , '0' , '9' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltNineOn , aatLayoutFeatureSelectorStylisticAltNineOff }, {ot .NewTag ('s' , 's' , '1' , '0' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltTenOn , aatLayoutFeatureSelectorStylisticAltTenOff }, {ot .NewTag ('s' , 's' , '1' , '1' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltElevenOn , aatLayoutFeatureSelectorStylisticAltElevenOff }, {ot .NewTag ('s' , 's' , '1' , '2' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltTwelveOn , aatLayoutFeatureSelectorStylisticAltTwelveOff }, {ot .NewTag ('s' , 's' , '1' , '3' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltThirteenOn , aatLayoutFeatureSelectorStylisticAltThirteenOff }, {ot .NewTag ('s' , 's' , '1' , '4' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltFourteenOn , aatLayoutFeatureSelectorStylisticAltFourteenOff }, {ot .NewTag ('s' , 's' , '1' , '5' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltFifteenOn , aatLayoutFeatureSelectorStylisticAltFifteenOff }, {ot .NewTag ('s' , 's' , '1' , '6' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltSixteenOn , aatLayoutFeatureSelectorStylisticAltSixteenOff }, {ot .NewTag ('s' , 's' , '1' , '7' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltSeventeenOn , aatLayoutFeatureSelectorStylisticAltSeventeenOff }, {ot .NewTag ('s' , 's' , '1' , '8' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltEighteenOn , aatLayoutFeatureSelectorStylisticAltEighteenOff }, {ot .NewTag ('s' , 's' , '1' , '9' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltNineteenOn , aatLayoutFeatureSelectorStylisticAltNineteenOff }, {ot .NewTag ('s' , 's' , '2' , '0' ), aatLayoutFeatureTypeStylisticAlternatives , aatLayoutFeatureSelectorStylisticAltTwentyOn , aatLayoutFeatureSelectorStylisticAltTwentyOff }, {ot .NewTag ('s' , 'u' , 'b' , 's' ), aatLayoutFeatureTypeVerticalPosition , aatLayoutFeatureSelectorInferiors , aatLayoutFeatureSelectorNormalPosition }, {ot .NewTag ('s' , 'u' , 'p' , 's' ), aatLayoutFeatureTypeVerticalPosition , aatLayoutFeatureSelectorSuperiors , aatLayoutFeatureSelectorNormalPosition }, {ot .NewTag ('s' , 'w' , 's' , 'h' ), aatLayoutFeatureTypeContextualAlternatives , aatLayoutFeatureSelectorSwashAlternatesOn , aatLayoutFeatureSelectorSwashAlternatesOff }, {ot .NewTag ('t' , 'i' , 't' , 'l' ), aatLayoutFeatureTypeStyleOptions , aatLayoutFeatureSelectorTitlingCaps , aatLayoutFeatureSelectorNoStyleOptions }, {ot .NewTag ('t' , 'n' , 'a' , 'm' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorTraditionalNamesCharacters , 16 }, {ot .NewTag ('t' , 'n' , 'u' , 'm' ), aatLayoutFeatureTypeNumberSpacing , aatLayoutFeatureSelectorMonospacedNumbers , 4 }, {ot .NewTag ('t' , 'r' , 'a' , 'd' ), aatLayoutFeatureTypeCharacterShape , aatLayoutFeatureSelectorTraditionalCharacters , 16 }, {ot .NewTag ('t' , 'w' , 'i' , 'd' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorThirdWidthText , 7 }, {ot .NewTag ('u' , 'n' , 'i' , 'c' ), aatLayoutFeatureTypeLetterCase , 14 , 15 }, {ot .NewTag ('v' , 'a' , 'l' , 't' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorAltProportionalText , 7 }, {ot .NewTag ('v' , 'e' , 'r' , 't' ), aatLayoutFeatureTypeVerticalSubstitution , aatLayoutFeatureSelectorSubstituteVerticalFormsOn , aatLayoutFeatureSelectorSubstituteVerticalFormsOff }, {ot .NewTag ('v' , 'h' , 'a' , 'l' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorAltHalfWidthText , 7 }, {ot .NewTag ('v' , 'k' , 'n' , 'a' ), aatLayoutFeatureTypeAlternateKana , aatLayoutFeatureSelectorAlternateVertKanaOn , aatLayoutFeatureSelectorAlternateVertKanaOff }, {ot .NewTag ('v' , 'p' , 'a' , 'l' ), aatLayoutFeatureTypeTextSpacing , aatLayoutFeatureSelectorAltProportionalText , 7 }, {ot .NewTag ('v' , 'r' , 't' , '2' ), aatLayoutFeatureTypeVerticalSubstitution , aatLayoutFeatureSelectorSubstituteVerticalFormsOn , aatLayoutFeatureSelectorSubstituteVerticalFormsOff }, {ot .NewTag ('v' , 'r' , 't' , 'r' ), aatLayoutFeatureTypeVerticalSubstitution , 2 , 3 }, {ot .NewTag ('z' , 'e' , 'r' , 'o' ), aatLayoutFeatureTypeTypographicExtras , aatLayoutFeatureSelectorSlashedZeroOn , aatLayoutFeatureSelectorSlashedZeroOff },}const deletedGlyph = 0xFFFF type aatClassCache = otLayoutMappingCache type aatApplyContext struct { plan *otShapePlan font *Font face Face buffer *Buffer gdef tables .GDEF ankrTable tables .Ankr rangeFlags []rangeFlags subtableFlags GlyphMask bufferIsReversed bool usingBufferGlyphSet bool bufferGlyphSet intSet firstSet intSet secondSet intSet machineClassCache aatClassCache }func newAatApplyContext(plan *otShapePlan , font *Font , buffer *Buffer ) *aatApplyContext { var out aatApplyContext out .plan = plan out .font = font out .face = font .face out .buffer = buffer return &out }func (c *aatApplyContext ) reverseBuffer () { c .buffer .Reverse () c .bufferIsReversed = !c .bufferIsReversed }func (c *aatApplyContext ) setupBufferGlyphSet () { c .usingBufferGlyphSet = len (c .buffer .Info ) >= 4 if !c .usingBufferGlyphSet { return } c .buffer .collectGlyphs (&c .bufferGlyphSet )}func (c *aatApplyContext ) bufferIntersectsMachine () bool { if c .usingBufferGlyphSet { return c .bufferGlyphSet .Intersects (c .firstSet ) } for _ , info := range c .buffer .Info { if c .firstSet .hasGlyph (info .Glyph ) { return true } } return false }func (c *aatApplyContext ) outputGlyphs (glyphs []GID ) bool { if c .usingBufferGlyphSet { c .bufferGlyphSet .addGlyphs (glyphs ) } for _ , glyph := range glyphs { if glyph == deletedGlyph { c .buffer .scratchFlags |= bsfAatHasDeleted c .buffer .cur (0 ).setAatDeleted () } else { if c .gdef .GlyphClassDef != nil { c .buffer .cur (0 ).glyphProps = c .gdef .GlyphProps (gID (glyph )) } } c .buffer .outputGlyphIndex (glyph ) } return true }func (c *aatApplyContext ) replaceGlyph (glyph GID ) { if glyph == deletedGlyph { c .buffer .scratchFlags |= bsfAatHasDeleted c .buffer .cur (0 ).setAatDeleted () } if c .usingBufferGlyphSet { c .bufferGlyphSet .addGlyph (glyph ) } if c .gdef .GlyphClassDef != nil { c .buffer .cur (0 ).glyphProps = c .gdef .GlyphProps (gID (glyph )) } c .buffer .replaceGlyphIndex (glyph )}func (c *aatApplyContext ) deleteGlyph () { c .buffer .scratchFlags |= bsfAatHasDeleted c .buffer .cur (0 ).setAatDeleted () c .buffer .replaceGlyphIndex (deletedGlyph )}func (c *aatApplyContext ) replace_glyph_inplace (i int , glyph gID ) { c .buffer .Info [i ].Glyph = GID (glyph ) if c .usingBufferGlyphSet { c .bufferGlyphSet .addGlyph (GID (glyph )) } if c .gdef .GlyphClassDef != nil { c .buffer .Info [i ].glyphProps = c .gdef .GlyphProps (glyph ) }}func (c *aatApplyContext ) hasAnyFlags (flag GlyphMask ) bool { for _ , fl := range c .rangeFlags { if fl .flags &flag != 0 { return true } } return false }type stateTableDriver struct { machine font .AATStateTable }func newStateTableDriver(machine font .AATStateTable , _ Face ) stateTableDriver { return stateTableDriver {machine : machine }}func (s *stateTableDriver ) getClass (glyph GID , cache *aatClassCache ) uint16 { key := uint16 (glyph ) if v , ok := cache .get (key ); ok { return v } v := s .machine .GetClass (glyph ) cache .set (key , v ) return v }type driverContext interface { inPlace() bool isActionable(entry tables .AATStateEntry ) bool transition(buffer *Buffer , s stateTableDriver , entry tables .AATStateEntry )}func (s stateTableDriver ) drive (c driverContext , ac *aatApplyContext ) { const ( stateStartOfText = uint16 (0 ) classEndOfText = uint16 (0 ) DontAdvance = 0x4000 ) buffer := ac .buffer if !c .inPlace () { buffer .clearOutput () } state := stateStartOfText var lastRange int = -1 if len (ac .rangeFlags ) > 1 { lastRange = 0 } startStateSafeToBreakEot := !c .isActionable (s .machine .GetEntry (stateStartOfText , classEndOfText )) for buffer .idx = 0 ; ; { class := classEndOfText if buffer .idx < len (buffer .Info ) { class = s .getClass (buffer .Info [buffer .idx ].Glyph , &ac .machineClassCache ) } resume : if debugMode { fmt .Printf ("\t\tState machine - class %d at index %d\n" , class , buffer .idx ) } entry := s .machine .GetEntry (state , class ) nextState := entry .NewState isNotEpsilonTransition := entry .Flags &DontAdvance == 0 isNotActionable := !c .isActionable (entry ) if lastRange != -1 { range_ := lastRange if buffer .idx < len (buffer .Info ) { cluster := buffer .cur (0 ).Cluster for cluster < ac .rangeFlags [range_ ].clusterFirst { range_ -- } for cluster > ac .rangeFlags [range_ ].clusterLast { range_ ++ } lastRange = range_ } if !(ac .rangeFlags [range_ ].flags &ac .subtableFlags != 0 ) { if buffer .idx == len (buffer .Info ) { break } state = stateStartOfText buffer .nextGlyph () continue } } else { isNullTransition := state == stateStartOfText && nextState == stateStartOfText && startStateSafeToBreakEot && isNotActionable && isNotEpsilonTransition && lastRange == -1 if isNullTransition { oldKlass := class for class == oldKlass { c .transition (buffer , s , entry ) if buffer .idx == len (buffer .Info ) { break } buffer .nextGlyph () class = classEndOfText if buffer .idx < len (buffer .Info ) { class = s .getClass (buffer .Info [buffer .idx ].Glyph , &ac .machineClassCache ) } } if buffer .idx == len (buffer .Info ) { break } goto resume } } wouldbeEntry := s .machine .GetEntry (stateStartOfText , class ) isSafeToBreak := !c .isActionable (entry ) && ( state == stateStartOfText || ((entry .Flags &DontAdvance != 0 ) && nextState == stateStartOfText ) || ( !c .isActionable (wouldbeEntry ) && (nextState == wouldbeEntry .NewState ) && (entry .Flags &DontAdvance ) == (wouldbeEntry .Flags &DontAdvance ))) && !c .isActionable (s .machine .GetEntry (state , classEndOfText )) if !isSafeToBreak && buffer .backtrackLen () != 0 && buffer .idx < len (buffer .Info ) { buffer .unsafeToBreakFromOutbuffer (buffer .backtrackLen ()-1 , buffer .idx +1 ) } c .transition (buffer , s , entry ) state = nextState if debugMode { fmt .Printf ("\t\tState machine - new state %d\n" , state ) } if buffer .idx == len (buffer .Info ) { break } if isNotEpsilonTransition { buffer .nextGlyph () } else { if buffer .maxOps <= 0 { buffer .maxOps -- buffer .nextGlyph () } else { buffer .maxOps -- } } } if !c .inPlace () { buffer .swapBuffers () }}type aatFeatureMapping struct { otFeatureTag font .Tag aatFeatureType aatLayoutFeatureType selectorToEnable aatLayoutFeatureSelector selectorToDisable aatLayoutFeatureSelector }func aatLayoutFindFeatureMapping(tag font .Tag ) *aatFeatureMapping { low , high := 0 , len (featureMappings ) for low < high { mid := low + (high -low )/2 p := featureMappings [mid ].otFeatureTag if tag < p { high = mid } else if tag > p { low = mid + 1 } else { return &featureMappings [mid ] } } return nil }func (sp *otShapePlan ) aatLayoutSubstitute (font *Font , buffer *Buffer , features []Feature ) { var map_ aatMap if len (features ) != 0 { builder := newAatMapBuilder (font .face .Font , sp .props ) for _ , feature := range features { builder .addFeature (feature ) } builder .compile (&map_ ) } else { map_ = sp .aatMap } morx := font .face .Morx c := newAatApplyContext (sp , font , buffer ) c .buffer .unsafeToConcat (0 , maxInt ) c .setupBufferGlyphSet () for i , chain := range morx { accel := font .morxAccels [i ] c .rangeFlags = map_ .chainFlags [i ] c .applyMorx (chain , accel ) } }const bsfAatHasDeleted = bsfShaper0 func aatLayoutRemoveDeletedGlyphs(buffer *Buffer ) { if buffer .scratchFlags &bsfAatHasDeleted != 0 { buffer .deleteGlyphsInplace (func (info *GlyphInfo ) bool { return info .isAatDeleted () }) }}func (sp *otShapePlan ) aatLayoutPosition (font *Font , buffer *Buffer ) { kerx := font .face .Kerx c := newAatApplyContext (sp , font , buffer ) c .ankrTable = font .face .Ankr c .setupBufferGlyphSet () c .applyKernx (kerx , font .kerxAccels )}func collectLookupGlyphs(dst *intSet , src tables .AatLookupMixed ) { for _ , r := range src .Coverage () { dst .addRange (uint32 (r [0 ]), uint32 (r [1 ])) }}func (sp *otShapePlan ) aatLayoutTrack (font *Font , buffer *Buffer ) { c := newAatApplyContext (sp , font , buffer ) c .applyTrak (0 )}
The pages are generated with Golds v0.8.7 . (GOOS=linux GOARCH=amd64)
Golds is a Go 101 project developed by Tapir Liu .
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