The microtype package

IMPLEMENTATION: Font setup 62\MT@get@font@dimen\MT@info@missing@char\MT@scale@factor1207 \MT@count=\wd\z@1208 \else1209 \MT@count=\fontcharwd\MT@font\MT@char@\relax1210 \fi1211 1212 \ifnum\MT@count=\z@ \MT@info@missing@char \fi1213 }For letterspaced fonts, we have to subtract the letterspacing amount from thecharacters’ widths. The protrusion amounts will be adjusted in \MT@set@pr@codes.The letterspaced font is already loaded so that 1em = \fontdimen 6.1214 1215 \MT@requires@pdftex6{1216 \g@addto@macro\MT@get@charwd{%1217 \MT@ifdefined@c@T\MT@letterspace@1218 {\advance\MT@count -\dimexpr\MT@letterspace@ sp *\dimexpr 1em/1000\relax}%1219 }1220 }\relax1221 }{No adjustment with versions 0.14f and 0.14g.1222 \def\MT@scale@to@em{%1223 \MT@count=\@tempb\relax1224 \ifnum\MT@count=\z@ \else1225 \MT@scale@factor1226 \fi1227 }We need this in \MT@warn@code@too@large (neutralised).1228 \def\MT@get@charwd{\MT@count=\MT@dimen@six}1229 }1230 1231 For the space unit.1232 1233 \def\MT@get@font@dimen#1{%1234 \ifnum\fontdimen#1\MT@font=\z@1235 \MT@warning@nl{Font `\MT@@font’ does not specify its\MessageBreak1236 \@backslashchar fontdimen #1 (it’s zero)!\MessageBreak1237 You should use a different `unit’ for \MT@curr@list@name}%1238 \else1239 \MT@count=\fontdimen#1\MT@font1240 \fi1241 }Info about missing characters, or characters with zero width.1242 \def\MT@info@missing@char{%1243 \MT@info@nl{Character `\the\MT@toks’1244 ^^X \iffontchar\MT@font\MT@char@1245 has a width of 0pt1246 ^^X \else is missing\fi1247 ^^Q \MessageBreak (it’s probably missing)1248 \MessageBreak in font `\MT@@font’.\MessageBreak1249 Ignoring protrusion settings for this character}%1250 }Furthermore, we might have to multiply with a factor.1251 \def\MT@scale@factor{%1252 \ifnum\csname MT@\MT@feat @factor@\endcsname=\@m \else1253 \expandafter\MT@scale\expandafter \@tempcntb1254 \csname MT@\MT@feat @factor@\endcsname \@m1255 \fi1256 \ifnum\@tempcntb>\csname MT@\MT@feat @max\endcsname\relax