1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
|
###########################################################################
# #
# coltex #
# #
# Jeffrey H. Kingston #
# 30 October 2002 #
# #
# Include file providing @ColourCommand and @TextureCommand symbols. #
# #
# This program is free software; you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation; either Version 3, or (at your option) #
# any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program; if not, write to the Free Software #
# Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA #
# #
# As a special exception, when this file is read by Lout when processing #
# a Lout source document, you may use the result without restriction. #
# #
###########################################################################
@SysInclude { lengths } # @PSLengths (needed for @TextureCommand)
###########################################################################
# #
# @ColourCommand #
# #
# Jeff Kingston #
# 19 October 2001 #
# Updated for compatibility with textures 28 October 2002. #
# #
# @ColourCommand converts a colour expressed in a manner that the #
# ordinary user can comprehend into the PostScript or PDF command #
# needed to obtain that colour, suitable for passing to @SetColour #
# or including in the left parameter of @Graphic. #
# #
# This symbol is needed in various places so I've taken the coward's #
# way out and @SysIncluded it at those places. #
# #
# Examples of behaviour for the PostScript back end: #
# #
# Parameter Result #
# ------------------------------------------------------------ #
# black "0.0 0.0 0.0 LoutSetRGBColor" #
# darkblue "0.0 0.0 0.5 LoutSetRGBColor" #
# white "1.0 1.0 1.0 LoutSetRGBColor" #
# none "" #
# nochange "" #
# "" "" #
# rgb <red> <blue> <green> "<red> <blue> <green> LoutSetRGBColor" #
# cmyk <c> <m> <y> <k> "<c> <m> <y> <k> LoutSetCMYKColor" #
# ------------------------------------------------------------ #
# #
# See the Expert's Guide for the use of LoutSetRGBColor and #
# LoutSetCMYKColor rather than setrgbcolor and setcmykcolor. #
# #
# @ColourCommand also does the right thing for the PDF back end; #
# its result is always empty for the PlainText back end. #
# #
###########################################################################
def @ColourCommand right @Body
{
def @RGB right coords
{
@BackEnd @Case {
PostScript @Yield { coords "LoutSetRGBColor" }
PDF @Yield { coords "rg" coords "RG" }
PlainText @Yield ""
}
}
def @CMYK right coords
{
@BackEnd @Case {
PostScript @Yield { coords "LoutSetCMYKColor" }
PDF @Yield { coords "k" coords "K" }
PlainText @Yield ""
}
}
def @RGBElse right alt
{
{ "rgb" @Common @Body } @Case {
"rgb" @Yield @RGB { "rgb" @Rump @Body }
else @Yield alt
}
}
def @CMYKElse right alt
{
{ "cmyk" @Common @Body } @Case {
"cmyk" @Yield @CMYK { "cmyk" @Rump @Body }
else @Yield alt
}
}
def @NoChangeElse right alt
{
@Body @Case {
{ "nochange" "none" "" } @Yield ""
else @Yield alt
}
}
def @RGBCoords
{
@Body @Case {
black @Yield { 0.0 0.0 0.0 }
darkblue @Yield { 0.0 0.0 0.5 }
blue @Yield { 0.0 0.0 1.0 }
lightblue @Yield { 0.5 0.5 1.0 }
darkgreen @Yield { 0.0 0.5 0.0 }
green @Yield { 0.0 1.0 0.0 }
lightgreen @Yield { 0.5 1.0 0.5 }
darkred @Yield { 0.5 0.0 0.0 }
red @Yield { 1.0 0.0 0.0 }
lightred @Yield { 1.0 0.5 0.5 }
darkcyan @Yield { 0.0 0.5 0.5 }
cyan @Yield { 0.0 1.0 1.0 }
lightcyan @Yield { 0.5 1.0 1.0 }
darkmagenta @Yield { 0.5 0.0 0.5 }
magenta @Yield { 1.0 0.0 1.0 }
lightmagenta @Yield { 1.0 0.5 1.0 }
darkyellow @Yield { 0.5 0.5 0.0 }
yellow @Yield { 1.0 1.0 0.0 }
lightyellow @Yield { 1.0 1.0 0.5 }
darkgray @Yield { 0.2 0.2 0.2 }
gray @Yield { 0.5 0.5 0.5 }
lightgray @Yield { 0.8 0.8 0.8 }
darkgrey @Yield { 0.2 0.2 0.2 }
grey @Yield { 0.5 0.5 0.5 }
lightgrey @Yield { 0.8 0.8 0.8 }
white @Yield { 1.0 1.0 1.0 }
}
}
@RGBElse @CMYKElse @NoChangeElse @RGB @RGBCoords
}
###########################################################################
# #
# @TextureCommand #
# #
# @TextureCommand converts a texture expressed in a manner that the #
# ordinary user can comprehend into the PostScript texture dictionary #
# needed to obtain that texture, suitable for passing to @SetTexture #
# or including in the left parameter of @Graphic. #
# #
###########################################################################
def @TextureCommand
left type
named scale { 1 }
named hscale { 1 }
named vscale { 1 }
import @PSLengths named angle { 0d }
import @PSLengths named hshift { 0i }
import @PSLengths named vshift { 0i }
import @PSLengths named width { "dft" }
import @PSLengths named height { "dft" }
import @PSLengths named gap { "dft" }
import @PSLengths named radius { "dft" }
import @PSLengths named linewidth { "dft" }
named font { "dft" }
import @PSLengths named size { "dft" }
named value { "dft" }
{
def @Dft left x right y
{
y @Case {
"dft" @Yield x
else @Yield y
}
}
def @SolidTexture
{
"null LoutSetTexture"
}
def @StripedTexture
{
def @Width { "1 pt" @Dft width }
def @Gap { "1 pt" @Dft gap }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @Width @Gap "add dup ]"
@Width @Gap "add dup"
"{"
"pop 0 0 moveto"
@Width @Gap "add 0 lineto"
"0" @Width "rlineto"
"0" @Width "lineto"
"closepath fill"
"}"
"LoutMakeTexture LoutSetTexture"
}
def @GridTexture
{
def @Width { "1 pt" @Dft width }
def @Gap { "1 pt" @Dft gap }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @Width @Gap "add dup ]"
@Width @Gap "add dup"
"{"
"pop 0 0 moveto"
@Width @Gap "add 0 lineto"
"0" @Width "rlineto"
@Gap "neg 0 rlineto"
"0" @Gap "rlineto"
@Width "neg 0 rlineto"
"closepath fill"
"}"
"LoutMakeTexture LoutSetTexture"
}
def @DottedTexture
{
def @Radius { "0.5 pt" @Dft radius }
def @Gap { "2 pt" @Dft gap }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @Gap "dup ]"
@Gap "dup"
"{"
"pop" @Gap "2 div dup" @Radius "0 360 arc fill"
"}"
"LoutMakeTexture LoutSetTexture"
}
def @ChessboardTexture
{
def @Width { "2 pt" @Dft width }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @Width "2 mul dup ]"
@Width "2 mul dup"
"{"
"pop 0 0 moveto"
@Width "0 rlineto"
"0" @Width "rlineto"
@Width "neg 0 rlineto"
closepath
@Width @Width "moveto"
@Width "0 rlineto"
"0" @Width "rlineto"
@Width "neg 0 rlineto"
"closepath fill"
"}"
"LoutMakeTexture LoutSetTexture"
}
def @BrickworkTexture
{
def @Width { "6 pt" @Dft width }
def @Height { "2 pt" @Dft height }
def @Linewidth { "0.5 pt" @Dft linewidth }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @Width @Height "2 mul ]"
@Width @Height "2 mul"
"{"
"pop 0 0 moveto" @Width "0 rlineto"
"0" @Height "moveto" @Width "0 rlineto"
"0" @Height "2 mul moveto" @Width "0 rlineto"
"0 0 moveto 0" @Height "rlineto"
@Width "0 moveto 0" @Height "rlineto"
@Width "2 div" @Height "moveto 0" @Height "rlineto"
"[] 0 setdash" @Linewidth "setlinewidth stroke"
"}"
"LoutMakeTexture LoutSetTexture"
}
def @HoneycombTexture
{
def @R { "2.0 pt" @Dft radius }
def @Linewidth { "0.5 pt" @Dft linewidth }
def @X { @R "0.5 mul" }
def @Y { @R "0.886 mul" }
def @NegX { @X "neg" }
def @NegY { @Y "neg" }
def @NegR { @R "neg" }
def @BoxWidth { @R @X "add 2 mul" }
def @BoxHeight { @Y "2 mul" }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @BoxWidth @BoxHeight "]"
@BoxWidth @BoxHeight
"{"
"pop"
@X "0 moveto"
@R "0 rlineto"
@X @Y "rlineto"
@R "0 rlineto"
@NegR "0 rlineto"
@NegX @Y "rlineto"
@NegR "0 rlineto"
@NegX @NegY "rlineto"
"closepath"
"[] 0 setdash" @Linewidth "setlinewidth stroke"
"}"
"LoutMakeTexture LoutSetTexture"
}
def @TriangularTexture
{
def @R { "4.0 pt" @Dft radius }
def @Linewidth { "0.5 pt" @Dft linewidth }
def @X { @R "0.5 mul" }
def @Y { @R "0.886 mul" }
def @BoxWidth { @R }
def @BoxHeight { @Y "2 mul" }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @BoxWidth @BoxHeight "]"
@BoxWidth @BoxHeight
"{"
"pop"
"0 0 moveto"
@R "0 lineto"
"0" @Y "2 mul lineto"
@R "0 rlineto"
"closepath"
"0" @Y "moveto"
@R "0 rlineto"
"[] 0 setdash" @Linewidth "setlinewidth stroke"
"}"
"LoutMakeTexture LoutSetTexture"
}
def @StringTexture
{
def @Width { "12 pt" @Dft width }
def @Height { "12 pt" @Dft height }
def @Font { "Times-Roman" @Dft font }
def @Size { "10 pt" @Dft size }
def @Value { "*" @Dft value }
scale hscale vscale angle hshift vshift
"2"
"[ 0 0" @Width @Height "]"
@Width @Height
"{"
"pop /"@Font "findfont" @Size "scalefont setfont"
"("@Value") dup false 0 0 moveto charpath flattenpath"
"pathbbox pop pop neg exch neg exch moveto show"
"}"
"LoutMakeTexture LoutSetTexture"
}
type @Case
{
"solid" @Yield @SolidTexture
"striped" @Yield @StripedTexture
"grid" @Yield @GridTexture
"dotted" @Yield @DottedTexture
"chessboard" @Yield @ChessboardTexture
"brickwork" @Yield @BrickworkTexture
"honeycomb" @Yield @HoneycombTexture
"triangular" @Yield @TriangularTexture
"string" @Yield @StringTexture
else @Yield type
}
}
###########################################################################
# #
# @TextureImport #
# #
# Used as an import for texture options. #
# #
# We cleverly replace @Texture by nothing inside those options, #
# and replace the known types by themselves plus @TextureCommand. #
# This allows the user to type #
# #
# texture { striped } #
# texture { striped @Texture } #
# texture { striped angle { 45d } } #
# texture { striped @Texture angle { 45d } } #
# #
# and it all winds up being a call to @TextureCommand. #
# #
###########################################################################
export
solid
striped
grid
dotted
chessboard
brickwork
honeycomb
triangular
string
@Texture
def @TextureImport
{
macro solid { "solid" @TextureCommand }
macro striped { "striped" @TextureCommand }
macro grid { "grid" @TextureCommand }
macro dotted { "dotted" @TextureCommand }
macro chessboard { "chessboard" @TextureCommand }
macro brickwork { "brickwork" @TextureCommand }
macro honeycomb { "honeycomb" @TextureCommand }
macro triangular { "triangular" @TextureCommand }
macro string { "string" @TextureCommand }
macro @Texture { }
}
|
