tex/lily-ps-defs.tex

   1 %
   2 % WARNING: don't leave blank lines in the PS-code; they are
   3 % transformed into \par
   4 %
   5
   6 %
   7 % Should put in a lily-ps.ps header?
   8 %
   9 %
  10
  11 %
  12 % header info (macros/defs, etc) should go into a \special{! ... },
  13 % note the ! sign.  See dvips.info for details.
  14 %
  15
  16 % Use of
  17 % /foo { operatorname } bind def
  18 %
  19 % ``compiles'' operatorname binding in the body of foo, making
  20 % the code faster, and more reliable (less flexible)
  21
  22
  23 % transplant a TeX dimension into the PS output.
  24 \def\PSsetTeXdimen#1{\expandafter\special{! /#1 (\the\csname #1\endcsname) deftexdimen}}
  25
  26 \def\turnOnPostScript{
  27 \def\embeddedps##1{%
  28         % This sets CTM so that you get to the currentpoint
  29         % by executing a 0 0 moveto
  30         \special{ps: @beginspecial @setspecial ##1 @endspecial}
  31 }
  32
  33 %
  34 % width, slope, height
  35 %
  36 \special{! % round cappings
  37 1 setlinecap
  38 /draw_beam
  39 {
  40         2 div /beam_thick exch def
  41         /beam_slope exch def
  42         /beam_wd exch def
  43         beam_slope beam_wd mul /beam_ht exch def
  44         0 beam_thick neg moveto
  45         beam_wd beam_ht rlineto
  46         0 beam_thick 2 mul rlineto
  47         0 beam_thick lineto
  48         closepath fill
  49 } bind def
  50 % PS helper: convert (0.2pt) to the token 0.2
  51 /settexdimen {  /thestring exch def
  52         thestring 0 thestring length 2 sub
  53         getinterval
  54         token
  55         pop exch pop }
  56 def
  57 %
  58 /deftexdimen {
  59         settexdimen
  60         def
  61 } def
  62 }
  63
  64
  65 \PSsetTeXdimen{staffrulethickness}
  66 \PSsetTeXdimen{staffheight}
  67 \special{! %
  68 /draw_decresc
  69         {
  70                 staffrulethickness setlinewidth
  71                 /cresc_cont exch def
  72                 /cresc_ht exch def
  73                 /cresc_wd exch def
  74 %
  75                 cresc_wd cresc_cont moveto
  76                 0 cresc_ht lineto
  77                 stroke
  78                 cresc_wd cresc_cont neg moveto
  79                 0 cresc_ht neg lineto
  80                 stroke
  81         }
  82         bind def
  83         /draw_cresc
  84         {
  85                 staffrulethickness setlinewidth
  86                 /cresc_cont exch def
  87                 /cresc_ht exch def
  88                 /cresc_wd exch def
  89 %
  90                 0 cresc_cont moveto
  91                 cresc_wd cresc_ht lineto
  92                 stroke
  93                 0 cresc_cont neg moveto
  94                 cresc_wd cresc_ht neg lineto
  95                 stroke
  96         }
  97         bind def
  98  /lily_distance {
  99         1 copy mul exch 1 copy mul add sqrt
 100  } bind def
 101  /draw_plet
 102         {
 103                 staffrulethickness setlinewidth
 104                 /dir exch def
 105                 /plet_dy exch def
 106                 /plet_dx exch def
 107                 staffheight 2 div /plet_gapx exch def
 108                 plet_dy plet_dx div plet_gapx mul /plet_gapy exch def
 109                 staffheight 4 div dir mul /plet_h exch def
 110 %
 111                 0 0 moveto
 112                 0 plet_h lineto
 113                 plet_dx plet_gapx sub 2 div
 114                         plet_dy plet_gapy sub 2 div plet_h add lineto
 115                 plet_dx plet_gapx add 2 div
 116                         plet_dy plet_gapy add 2 div plet_h add moveto
 117                 plet_dx plet_dy plet_h add lineto
 118                 plet_dx plet_dy lineto
 119                 stroke
 120         }
 121         bind def
 122  staffheight 2 div /slurhtlimit exch def
 123  /slurratio 0.3333 def
 124  %
 125  %  (b*ratio)/(1 + b / htlimit)
 126  /getslurcontrol
 127  {
 128         slurhtlimit add /slurheight exch def
 129         slurheight 90 div /slur_alpha exch def
 130         slurratio 60 div slur_alpha div  /slur_beta  exch def
 131         slur_beta mul 1 atan slur_alpha mul
 132  } bind def
 133  staffrulethickness 1.5 mul  /slur_thick exch def
 134  /draw_slur
 135  {
 136         staffrulethickness setlinewidth
 137         0 0 moveto
 138         /slur_dir exch def
 139         /slur_height exch def
 140         /slur_dy exch def
 141         /slur_dx exch def
 142         slur_dy slur_dx lily_distance /slur_b  exch def
 143         slur_b slur_height getslurcontrol
 144         slur_dir mul /slur_ht exch def
 145         slur_b slur_height getslurcontrol /slur_indent exch def
 146 %
 147         slur_dy slur_dx atan rotate
 148         slur_indent slur_ht
 149         slur_b slur_indent sub slur_ht
 150         slur_b 0
 151         rcurveto
 152  %
 153         slur_indent neg slur_ht slur_dir slur_thick mul  sub
 154         slur_indent slur_b sub slur_ht slur_dir slur_thick mul  sub
 155         slur_b neg  0
 156         rcurveto
 157  %
 158         gsave
 159                 fill
 160         grestore
 161         stroke
 162  } bind def}}
 163
 164
 165
 166
 167 \def\turnOnExperimentalFeatures{
 168 % draw a slur in embedded postscript
 169 \special{ps:
 170 }}