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Text File  |  1993-12-21  |  4.4 KB  |  97 lines
  1. % The basic correction for write-white fonts occurs in the definition
  2. %    font_setup.  This can be used to overwrite the write-black
  3. %     definition in cmbase.mf
  4. %
  5. def white_setup =
  6.  if monospace: let adjust_fit=mono_adjust_fit;
  7.   def mfudged=fudged enddef;
  8.   mono_charic#:=body_height#*slant;
  9.   if mono_charic#<0: mono_charic#:=0; fi
  10.   mono_charwd#:=9u#; define_whole_pixels(mono_charwd);
  11.  else: let adjust_fit=normal_adjust_fit;
  12.   def mfudged= enddef; fi
  13.  if math_fitting: let math_fit=do_math_fit
  14.  else: let math_fit=ignore_math_fit fi;
  15.  define_pixels(u,width_adj,serif_fit,cap_serif_fit,jut,cap_jut,beak,
  16.   bar_height,dish,bracket,beak_jut,stem_corr,vair_corr,apex_corr);
  17.  define_blacker_pixels(notch_cut,cap_notch_cut);
  18.  forsuffixes $=notch_cut,cap_notch_cut: if $<3: $:=3; fi endfor
  19.  define_whole_pixels(letter_fit,fine,crisp,tiny);
  20.  define_whole_vertical_pixels(body_height,asc_height,
  21.   cap_height,fig_height,x_height,comma_depth,desc_depth,serif_drop);
  22.  define_whole_blacker_pixels(thin_join,hair,stem,curve,flare,
  23.   dot_size,cap_hair,cap_stem,cap_curve);
  24.  define_whole_vertical_blacker_pixels(vair,bar,slab,cap_bar,cap_band);
  25.  define_corrected_pixels(o,apex_o);
  26.  forsuffixes $=hair,stem,cap_stem:
  27.   fudged$.#:=fudge*$.#; fudged$:=hround(fudged$.#*hppp+blacker);
  28.   forever: exitif fudged$>.9fudge*$; fudged$:=fudged$+1; endfor endfor
  29.  rule_thickness:=ceiling(rule_thickness#*hppp);
  30.  heavy_rule_thickness:=ceiling(3rule_thickness#*hppp);
  31.  oo:=vround(.5o#*hppp*o_correction)+eps;
  32.  apex_oo:=vround(.5apex_o#*hppp*o_correction)+eps;
  33.  lowres_fix(stem,curve,flare) 1.3;
  34.  lowres_fix(stem,curve) 1.2;
  35.  lowres_fix(cap_stem,cap_curve) 1.2;
  36.  lowres_fix(hair,cap_hair) 1.2;
  37.  lowres_fix(cap_band,cap_bar,bar,slab) 1.2;
  38.  stem':=hround(stem-stem_corr); cap_stem':=hround(cap_stem-stem_corr);
  39.  vair':=vround(vair+vair_corr);
  40.  vstem:=vround .8[vair,stem]; cap_vstem:=vround .8[vair,cap_stem];
  41.  ess:=(ess#/stem#)*stem; cap_ess:=(cap_ess#/cap_stem#)*cap_stem;
  42.  dw:=(curve#-stem#)*hppp; bold:=curve#*hppp+blacker;
  43.  dh#:=.6designsize;
  44.  stem_shift#:=if serifs: 2stem_corr# else: 0 fi;
  45.  more_super:=max(superness,sqrt .77superness);
  46.  hein_super:=max(superness,sqrt .81225258superness); % that's $2^{-.3}$
  47.  clear_pen_memory;
  48.  if fine=0: fine:=1; fi
  49.  forsuffixes $=fine,crisp,tiny:
  50. %%% fine $ %%%% temporary formatting convention for MFT
  51.   if $>fudged.hair: $:=fudged.hair; fi
  52.   $.breadth:=$;
  53.   pickup if $=0: nullpen else: pencircle scaled $; $:=$-eps fi;
  54.   $.nib:=savepen; breadth_[$.nib]:=$;
  55.   forsuffixes $$=lft,rt,top,bot: shiftdef($.$$,$$ 0); endfor endfor
  56. %%% @ $ %%%% restore ordinary formatting for $
  57.  min_Vround:=max(fine.breadth,crisp.breadth,tiny.breadth,2); % "WRITE WHITE" ONLY!
  58.  if min_Vround<vround min_Vround: min_Vround:=vround min_Vround; fi
  59.  if flare<vround flare: flare:=vround flare; fi
  60.  forsuffixes $=vair,bar,slab,cap_bar,cap_band,vair',vstem,cap_vstem,bold:
  61.   if $<min_Vround: $:=min_Vround; fi endfor
  62.  pickup pencircle scaled rule_thickness; rule.nib:=savepen;
  63.  math_axis:=good.y(math_axis#*hppp);
  64.  pickup pencircle scaled if hefty:(.6[vair,fudged.hair]) else:fudged.hair fi;
  65.  light_rule.nib:=savepen;
  66.  pickup pencircle xscaled cap_curve yscaled cap_hair rotated 30;
  67.  cal.nib:=savepen;
  68.  pair cal.extension; cal.extension:=(.75cap_curve,0) rotated 30;
  69.  pickup pencircle xscaled cap_curve yscaled cap_hair rotated 70;
  70.  tilted.nib:=savepen;
  71.  pickup pencircle xscaled curve yscaled cap_hair rotated 70;
  72.  med_tilted.nib:=savepen;
  73.  pickup pencircle xscaled cap_stem yscaled cap_hair rotated 30;
  74.  med_cal.nib:=savepen;
  75.  pickup pencircle xscaled stem yscaled cap_hair rotated 30;
  76.  light_cal.nib:=savepen;
  77.  pickup pencircle xscaled(cap_curve+dw) yscaled cap_hair rotated 30;
  78.  heavy_cal.nib:=savepen;
  79.  bot_flourish_line:=-.5u-o;
  80.  pair bend; bend=(.5u,0);
  81.  pair flourish_change; flourish_change=(4u,.2asc_height);
  82.  join_radius:=u;
  83.  currenttransform:=identity slanted slant
  84.   yscaled aspect_ratio scaled granularity;
  85.  if currenttransform=identity: let t_=relax
  86.  else: def t_ = transformed currenttransform enddef fi;
  87.  numeric paren_depth#; .5[body_height#,-paren_depth#]=math_axis#;
  88.  numeric asc_depth#; .5[asc_height#,-asc_depth#]=math_axis#;
  89.  body_depth:=desc_depth+body_height-asc_height;
  90.  shrink_fit:=1+hround(2letter_fit#*hppp)-2letter_fit;
  91.  if not string mode: if mode<=smoke: shrink_fit:=0; fi fi
  92. forsuffixes $=thin_join,hair,curve,flare,dot_size,cap_hair,cap_curve,
  93.  vair,bar,slab,cap_bar,cap_band,stem',cap_stem',vair',fudged.hair,
  94.  fudged.stem,fudged.cap_stem: $:=max($,2); endfor % "WRITE WHITE" ONLY!
  95.  enddef;
  96.  
  97.