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1 %

2 % PostScript prolog.

4 %

5 % Author: Markku Rossi <mtr@iki.fi>

6 %

7 %

8 % This file is part of GNU enscript.

9 %

10 % This program is free software; you can redistribute it and/or modify

11 % it under the terms of the GNU General Public License as published by

12 % the Free Software Foundation; either version 2, or (at your option)

13 % any later version.

14 %

15 % This program is distributed in the hope that it will be useful,

16 % but WITHOUT ANY WARRANTY; without even the implied warranty of

17 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

18 % GNU General Public License for more details.

19 %

20 % You should have received a copy of the GNU General Public License

21 % along with this program; see the file COPYING. If not, write to

22 % the Free Software Foundation, 51 Franklin Street, Fifth Floor,

23 % Boston, MA 02110-1301, USA.

24 %

26 % -- code follows this line --

27 %

28 % Procedures.

29 %

31 /_S { % save current state

32 /_s save def

33 } def

34 /_R { % restore from saved state

35 _s restore

36 } def

38 /S { % showpage protecting gstate

39 gsave

40 showpage

41 grestore

42 } bind def

44 /MF { % fontname newfontname -> - make a new encoded font

45 /newfontname exch def

46 /fontname exch def

48 /fontdict fontname findfont def

49 /newfont fontdict maxlength dict def

51 fontdict {

52 exch

53 dup /FID eq {

54 % skip FID pair

55 pop pop

56 } {

57 % copy to the new font dictionary

58 exch newfont 3 1 roll put

59 } ifelse

60 } forall

62 newfont /FontName newfontname put

64 % insert only valid encoding vectors

65 encoding_vector length 256 eq {

66 newfont /Encoding encoding_vector put

67 } if

69 newfontname newfont definefont pop

70 } def

72 /MF_PS { % fontname newfontname -> - make a new font preserving its enc

73 /newfontname exch def

74 /fontname exch def

76 /fontdict fontname findfont def

77 /newfont fontdict maxlength dict def

79 fontdict {

80 exch

81 dup /FID eq {

82 % skip FID pair

83 pop pop

84 } {

85 % copy to the new font dictionary

86 exch newfont 3 1 roll put

87 } ifelse

88 } forall

90 newfont /FontName newfontname put

92 newfontname newfont definefont pop

93 } def

95 /SF { % fontname width height -> - set a new font

96 /height exch def

97 /width exch def

99 findfont

100 [width 0 0 height 0 0] makefont setfont

101 } def

102

103 /SUF { % fontname width height -> - set a new user font

104 /height exch def

105 /width exch def

106

107 /F-gs-user-font MF

108 /F-gs-user-font width height SF

109 } def

110

111 /SUF_PS { % fontname width height -> - set a new user font preserving its enc

112 /height exch def

113 /width exch def

114

115 /F-gs-user-font MF_PS

116 /F-gs-user-font width height SF

117 } def

118

119 /M {moveto} bind def

120 /s {show} bind def

121

122 /Box { % x y w h -> - define box path

123 /d_h exch def /d_w exch def /d_y exch def /d_x exch def

124 d_x d_y moveto

125 d_w 0 rlineto

126 0 d_h rlineto

127 d_w neg 0 rlineto

128 closepath

129 } def

130

131 /bgs { % x y height blskip gray str -> - show string with bg color

132 /str exch def

133 /gray exch def

134 /blskip exch def

135 /height exch def

136 /y exch def

137 /x exch def

138

139 gsave

140 x y blskip sub str stringwidth pop height Box

141 gray setgray

142 fill

143 grestore

144 x y M str s

145 } def

146

147 /bgcs { % x y height blskip red green blue str -> - show string with bg color

148 /str exch def

149 /blue exch def

150 /green exch def

151 /red exch def

152 /blskip exch def

153 /height exch def

154 /y exch def

155 /x exch def

156

157 gsave

158 x y blskip sub str stringwidth pop height Box

159 red green blue setrgbcolor

160 fill

161 grestore

162 x y M str s

163 } def

164

165 % Highlight bars.

166 /highlight_bars { % nlines lineheight output_y_margin gray -> -

167 gsave

168 setgray

169 /ymarg exch def

170 /lineheight exch def

171 /nlines exch def

172

173 % This 2 is just a magic number to sync highlight lines to text.

174 0 d_header_y ymarg sub 2 sub translate

175

176 /cw d_output_w cols div def

177 /nrows d_output_h ymarg 2 mul sub lineheight div cvi def

178

179 % for each column

180 0 1 cols 1 sub {

181 cw mul /xp exch def

182

183 % for each rows

184 0 1 nrows 1 sub {

185 /rn exch def

186 rn lineheight mul neg /yp exch def

187 rn nlines idiv 2 mod 0 eq {

188 % Draw highlight bar. 4 is just a magic indentation.

189 xp 4 add yp cw 8 sub lineheight neg Box fill

190 } if

191 } for

192 } for

193

194 grestore

195 } def

196

197 % Line highlight bar.

198 /line_highlight { % x y width height gray -> -

199 gsave

200 /gray exch def

201 Box gray setgray fill

202 grestore

203 } def

204

205 % Column separator lines.

206 /column_lines {

207 gsave

208 .1 setlinewidth

209 0 d_footer_h translate

210 /cw d_output_w cols div def

211 1 1 cols 1 sub {

212 cw mul 0 moveto

213 0 d_output_h rlineto stroke

214 } for

215 grestore

216 } def

217

218 % Column borders.

219 /column_borders {

220 gsave

221 .1 setlinewidth

222 0 d_footer_h moveto

223 0 d_output_h rlineto

224 d_output_w 0 rlineto

225 0 d_output_h neg rlineto

226 closepath stroke

227 grestore

228 } def

229

230 % Do the actual underlay drawing

231 /draw_underlay {

232 ul_style 0 eq {

233 ul_str true charpath stroke

234 } {

235 ul_str show

236 } ifelse

237 } def

238

239 % Underlay

240 /underlay { % - -> -

241 gsave

242 0 d_page_h translate

243 d_page_h neg d_page_w atan rotate

244

245 ul_gray setgray

246 ul_font setfont

247 /dw d_page_h dup mul d_page_w dup mul add sqrt def

248 ul_str stringwidth pop dw exch sub 2 div ul_h_ptsize -2 div moveto

249 draw_underlay

250 grestore

251 } def

252

253 /user_underlay { % - -> -

254 gsave

255 ul_x ul_y translate

256 ul_angle rotate

257 ul_gray setgray

258 ul_font setfont

259 0 0 ul_h_ptsize 2 div sub moveto

260 draw_underlay

261 grestore

262 } def

263

264 % Page prefeed

265 /page_prefeed { % bool -> -

266 statusdict /prefeed known {

267 statusdict exch /prefeed exch put

268 } {

269 pop

270 } ifelse

271 } def

272

273 % Wrapped line markers

274 /wrapped_line_mark { % x y charwith charheight type -> -

275 /type exch def

276 /h exch def

277 /w exch def

278 /y exch def

279 /x exch def

280

281 type 2 eq {

282 % Black boxes (like TeX does)

283 gsave

284 0 setlinewidth

285 x w 4 div add y M

286 0 h rlineto w 2 div 0 rlineto 0 h neg rlineto

287 closepath fill

288 grestore

289 } {

290 type 3 eq {

291 % Small arrows

292 gsave

293 .2 setlinewidth

294 x w 2 div add y h 2 div add M

295 w 4 div 0 rlineto

296 x w 4 div add y lineto stroke

297

298 x w 4 div add w 8 div add y h 4 div add M

299 x w 4 div add y lineto

300 w 4 div h 8 div rlineto stroke

301 grestore

302 } {

303 % do nothing

304 } ifelse

305 } ifelse

306 } def

307

308 % EPSF import.

309

310 /BeginEPSF {

311 /b4_Inc_state save def % Save state for cleanup

312 /dict_count countdictstack def % Count objects on dict stack

313 /op_count count 1 sub def % Count objects on operand stack

314 userdict begin

315 /showpage { } def

316 0 setgray 0 setlinecap

317 1 setlinewidth 0 setlinejoin

318 10 setmiterlimit [ ] 0 setdash newpath

319 /languagelevel where {

320 pop languagelevel

321 1 ne {

322 false setstrokeadjust false setoverprint

323 } if

324 } if

325 } bind def

326

327 /EndEPSF {

328 count op_count sub { pos } repeat % Clean up stacks

329 countdictstack dict_count sub { end } repeat

330 b4_Inc_state restore

331 } bind def

332

333 % Check PostScript language level.

334 /languagelevel where {

335 pop /gs_languagelevel languagelevel def

336 } {

337 /gs_languagelevel 1 def

338 } ifelse