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$Integrating TEX, MetaPost, JavaScript and PDF - Pragma ADE$

140 Extensions [fonts.composing.define] \definefontfeature [default-plus-compose] [compose=yes] \definefont [MyFont] [Serif*default-plus-compose] Fonts like Latin Modern have lots of glyphs but still lack some. Although the composer can add some of the missing, some of those new virtual glyphs probably will never look real good. For instance, putting additional accents on top of already accented uppercase characters will fail when that character has a rather tight (or even clipped) boundingbox in order not to spoil the lineheight. You can get some more insight in the process by turning on tracing: \enabletrackers[fonts.composing.visualize] One reason why composing can be suboptimal is that it uses the boundingbox of the characters that are combined. If you really depend on a specific font and need some of the missing characters it makes sense to spend some time on optimizing the rendering. This can be done via the goodies mechanism. As an example we’ve added lm-compose-test.lfg to the distribution. First we show how it looks at the T E X end: \enabletrackers[fonts.composing.visualize] \definefontfeature [default-plus-compose] [compose=yes] \loadfontgoodies [lm-compose-test] % playground \definefont [MyComposedSerif] [file:lmroman10regular*default-plus-compose at 48pt] B Ḃ Ḅ The positions of the dot accents on top and below the capital B is defined in a goodie file: return {
} name = "lm-compose-test", version = "1.00", comment = "Goodies that demonstrate composition.", author = "Hans and Mojca", copyright = "ConTeXt development team", compositions = { ["lmroman12-regular"] = compose, } As this is an experimental feature there are several ways to deal with this. For instance: local defaultfraction = 10.0 local compose = { dy = defaultfraction, [0x1E02] = { -- B dot above dy = 150 }, [0x1E04] = { -- B dot below dy = 150 }, } Here the fraction is relative to the difference between the height of the accentee and the accent. A better solution is the following: local compose = { [0x1E02] = { -- B dot above anchored = "top", }, [0x1E04] = { -- B dot below anchored = "bottom", }, [0x0042] = { -- B anchors = { top = { x = 300, y = 700, }, bottom = { x = 300, y = -30, }, }, }, [0x0307] = { anchors = { 141 Extensions
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explaining luatex and mkiv Fonts ou
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2 Contents 5.4 Goodies 73 5.5 Analy
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4 Contents
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6 Introduction In this manual we wi
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8 Font formats a b g l q . ; ? ffi
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10 Font formats When T E X ships ou
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12 A.4 A.3 Font formats multiple ac
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14 Font formats can be rules that t
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16 Font formats /fonts/tfm/vendor/t
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18 Modes raw tfm normalized tfm raw
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20 Modes shown next: kern cyrl dflt
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22 Modes ccmp cyrl mkd абвгде
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24 Modes dlig latn gag abcdefghijkl
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26 Modes liga latn nsm abcdefghijkl
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28 Modes salt latn mol abcdefghijkl
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30 Modes glyph 256 font 42: U+00074
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36 Modes optimizer that can apply a
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38 Modes ا خǇَ﮲ ف﮲َ step
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40 Modes dir +TRT glyph 256 font 49
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42 Modes and now we get: 123 normal
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44 Modes MkIV run can be faster tha
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46 Lookups \font \MyFontG = lmr12 s
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48 Lookups 3.4 Name Say that we wan
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50 Lookups We add another specifier
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52 Methods \definefont [MyFont] [Bo
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54 Methods } copyright = "ConTeXt d
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56 Features of all, all we get to s
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58 Features in base mode. A single
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60 Features accumulate within a wor
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62 Features features analyze=yes, c
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64 Features \definedfont[lmroman10-
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66 Features single substitutions or
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68 F -0.492 eatures result ffi feat
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70 Features font 80: lmroman10-regu
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72 Features font 46: cambria.ttf @
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74 Features } } This goodie file is
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76 Features { name = "msbm10.tfm",
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78 Features \starttypescript[somefo
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80 Features \setupbodyfont [mojcasf
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82 Features } normalweight = "extra
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84 Features "QF.waqf", "SKTH.waqf",
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86 Features featureset=smallcaps] O
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88 Features } }, When defining the
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Page 94 and 95: 92 Features } } ["LMRoman-Bold"] =
Page 96 and 97: 94 Features In fact, in addition to
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Page 100 and 101: 98 Features step 1 I don't wanna kn
Page 102 and 103: 100 Features If you’re lucky your
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Page 140 and 141: 138 Extensions protrusion classes T
Page 144 and 145: 142 } Extensions top = { x = -250,
Page 146 and 147: 144 Extensions
Page 148 and 149: 146 Hooks
Page 150 and 151: 148 ) Appendix (LIG C l O 10) (KRN
Page 152 and 153: 150 ) Appendix (KRN O 177 R 0.056)
Page 154 and 155: 152 Appendix Notice Copyright 2003-
Page 156 and 157: 154 Appendix ... KPX seven.prop hyp
Page 158 and 159: 156 Appendix name = , features = ,
Page 160 and 161: 158 Appendix [] = "", ... default =
Page 162: 160 Appendix A.10 Discretionary nod
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