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
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
|
% \iffalse meta-comment
%
% Copyright (C) 2008-2009 by Hans Hagen, Taco Hoekwater and Elie Roux
% <elie.roux@telecom-bretagne.eu>.
%
% This work is under the CC0 license.
%
% This Current Maintainer of this work is Elie Roux.
%
% This work consists of the main source file luamplib.dtx
% and the derived files
% luamplib.sty, luamplib.lua, luamplib-createmem.lua and luamplib.pdf.
%
%
% Unpacking:
% tex luamplib.dtx
%
% Documentation:
% pdflatex luamplib.dtx
%
% The class ltxdoc loads the configuration file ltxdoc.cfg
% if available. Here you can specify further options, e.g.
% use A4 as paper format:
% \PassOptionsToClass{a4paper}{article}
%
%
%<*ignore>
\begingroup
\def\x{LaTeX2e}%
\expandafter\endgroup
\ifcase 0\ifx\install y1\fi\expandafter
\ifx\csname processbatchFile\endcsname\relax\else1\fi
\ifx\fmtname\x\else 1\fi\relax
\else\csname fi\endcsname
%</ignore>
%<*install>
\input docstrip.tex
\Msg{************************************************************************}
\Msg{* Installation}
\Msg{* Package: luamplib 2009/03/09 v1.01 metapost package for LuaTeX with luamplib.}
\Msg{************************************************************************}
\keepsilent
\askforoverwritefalse
\let\MetaPrefix\relax
\preamble
This is a generated file.
Copyright (C) 2008-2009 by Hans Hagen, Taco Hoekwater and Elie Roux
<elie.roux@telecom-bretagne.eu>.
This work is under the CC0 license.
This Current Maintainer of this work is Elie Roux.
This work consists of the main source file luamplib.dtx
and the derived files
luamplib.sty, luamplib.lua, luamplib-createmem.lua and luamplib.pdf.
\endpreamble
\let\MetaPrefix\DoubleperCent
\generate{%
\usedir{tex/luatex/mplib}%
\file{luamplib.sty}{\from{luamplib.dtx}{package}}%
}
% The following hacks are to generate a lua file with lua comments starting by -- instead of %%
\def\MetaPrefix{-- }
\def\luapostamble{%
\MetaPrefix^^J%
\MetaPrefix\space End of File `\outFileName'.%
}
\def\currentpostamble{\luapostamble}%
\generate{%
\usedir{tex/luatex/mplib}%
\file{luamplib.lua}{\from{luamplib.dtx}{lua}}%
\file{luamplib-createmem.lua}{\from{luamplib.dtx}{gen-lua}}%
}
\obeyspaces
\Msg{************************************************************************}
\Msg{*}
\Msg{* To finish the installation you have to move the following}
\Msg{* files into a directory searched by TeX:}
\Msg{*}
\Msg{* luamplib.sty luamplib.lua}
\Msg{*}
\Msg{* Happy TeXing!}
\Msg{*}
\Msg{************************************************************************}
\endbatchfile
%</install>
%<*ignore>
\fi
%</ignore>
%<*driver>
\NeedsTeXFormat{LaTeX2e}
\ProvidesFile{luamplib.drv}%
[2009/03/09 v1.01 mplib package for LuaTeX.]%
\documentclass{ltxdoc}
\begin{document}
\DocInput{luamplib.dtx}%
\end{document}
%</driver>
% \fi
%
% \CheckSum{2}
%
% \CharacterTable
% {Upper-case \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
% Lower-case \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
% Digits \0\1\2\3\4\5\6\7\8\9
% Exclamation \! Double quote \" Hash (number) \#
% Dollar \$ Percent \% Ampersand \&
% Acute accent \' Left paren \( Right paren \)
% Asterisk \* Plus \+ Comma \,
% Minus \- Point \. Solidus \/
% Colon \: Semicolon \; Less than \<
% Equals \= Greater than \> Question mark \?
% Commercial at \@ Left bracket \[ Backslash \\
% Right bracket \] Circumflex \^ Underscore \_
% Grave accent \` Left brace \{ Vertical bar \|
% Right brace \} Tilde \~}
%
% \title{The \textsf{luamplib} package}
% \date{2009/03/09 v1.01}
% \author{Hans Hagen, Taco Hoekwater and Elie Roux \\ \texttt{elie.roux@telecom-bretagne.eu}}
%
% \maketitle
%
% \begin{abstract}
% Package to have metapost code typeset directly in a document with Lua\TeX .
% \end{abstract}
%
% \section{Documentation}
%
% This packages aims at providing a simple way to typeset directly metapost code in a document with Lua\TeX . Lua\TeX\ is built with the lua \texttt{mplib} library, that runs metapost code. This package is basically a wrapper (in Lua) for the Lua \texttt{mplib} functions and some \TeX\ functions to have the output of the \texttt{mplib} functions in the pdf.
%
% The package need to be in PDF mode in order to output something, as PDF specials are not supported by the DVI format and tools.
%
% The metapost figures are put in a \TeX\ \texttt{hbox} with dimensions adjusted to the metapost code.
%
% The code is from the \texttt{supp-mpl.lua} and \texttt{supp-mpl.tex} files from Con\TeX t, they have been adapted to \LaTeX\ and Plain by Elie Roux. The changes are:
%
% \begin{itemize}
% \item a \LaTeX\ environment
% \item all \TeX\ macros start by \texttt{mplib}
% \item use of the luatextra printing and module functions
% \end{itemize}
%
% Using this package is easy: in Plain, type your metapost code between the macros \texttt{mplibcode} and \texttt{endmplibcode}, and in \LaTeX\ in the \texttt{mplibcode} environment.
%
% In order to use metapost, some \texttt{.mem} files are needed. These files must be generated with the same version of \texttt{mplib} as the version of Lua\TeX . These files names can be changed, they are by default \texttt{luatex-plain.mem} and \texttt{luatex-mpfun.mem}. If this package is to be included in a distribution, some values may have to be changed in the file \texttt{luamplib.lua}, see comments.
%
%
% If your distribution does not provide valid \texttt{.mem} files (\TeX Live 2009 will be the first), you'll have to generate and install them by hand, with the script \texttt{luamplib-createmem.lua} included in this package.
%
% \section{Files}
%
% This package contains three files:
% \begin{itemize}
% \item \texttt{luamplib.lua} containing the lua code that calls mplib
% \item \texttt{luamplib.sty} containing the macros for \LaTeX\ and Plain
% \item \texttt{create-mem.lua}, a standalone mem generation script
% \end{itemize}
%
% \iffalse
%<*lua>
% \fi
%
% \subsection{\texttt{luamplib.lua}}
%
% First the \texttt{luamplib} module is registered as a Lua\TeX\ module, with some informations. Here we can't name it \texttt{mplib}, as the name is already taken.
%
% \begin{macrocode}
luamplib = { }
luamplib.module = {
name = "luamplib",
version = 1.01,
date = "2009/03/09",
description = "Lua functions to typeset Metapost directly with MPLib.",
author = "Hans Hagen, Taco Hoekwater & Elie Roux",
copyright = "ConTeXt Development Team & Elie Roux",
license = "CC0",
}
luatextra.provides_module(luamplib.module)
% \end{macrocode}
% This module is a stripped down version of libraries that are used
% by Con\TeX t.
% \begin{macrocode}
local format, concat, abs = string.format, table.concat, math.abs
% \end{macrocode}
%
% The \texttt{mem} file and the format name are hardcoded, and they can be set with \TeX\ if it's useful. The \TeX\ distributions should change these values if necessary.
%
% \begin{macrocode}
luamplib.currentformat = "plain"
luamplib.currentmem = "luatex-plain.mem"
local currentformat = luamplib.currentformat
local currentmem = luamplib.currentmem
function luamplib.setformat (name)
luamplib.currentformat = name
end
function luamplib.setmemfile(name)
luamplib.currentmem = name
end
% \end{macrocode}
%
% We use the \texttt{kpse} library unless a finder is already defined. To find the .mem files with kpse, we have to set the \texttt{engine} environment variable to \texttt{metapost}.
%
% \begin{macrocode}
luamplib.finder = luamplib.finder or function(name, mode, ftype)
if mode == "w" then
return name
else
local result
if ftype == 'mem' then
local envsave = os.getenv('engine')
os.setenv('engine', 'metapost')
result = kpse.find_file(name,ftype)
os.setenv('engine', envsave)
else
result = kpse.find_file(name,ftype)
end
return result
end
end
function luamplib.info (...)
luatextra.module_info('luamplib', format(...))
end
function luamplib.log (...)
luatextra.module_log('luamplib', format(...))
end
function luamplib.term (...)
luatextra.module_term('luamplib', format(...))
end
function luamplib.warning (...)
luatextra.module_warning('luamplib', format(...))
end
function luamplib.error (...)
luatextra.module_error('luamplib', format(...))
end
% \end{macrocode}
%
% This is a small hack for \LaTeX . In \LaTeX\ we read the metapost code line by line, but it needs to be passed entirely to \texttt{luamplib.process}, so we simply add the lines in \texttt{luamplib.data} and at the end we call \texttt{luamplib.process} on \texttt{luamplib.data}.
%
% \begin{macrocode}
luamplib.data = ""
function luamplib.resetdata()
luamplib.data = ""
end
function luamplib.addline(line)
luamplib.data = luamplib.data .. '\n' .. line
end
function luamplib.processlines()
luamplib.process(luamplib.data)
luamplib.resetdata()
end
% \end{macrocode}
%
%
% \begin{macro}{luamplib.load}
%
% This function is the one loading the metapost format we want. It uses the \texttt{luamplib.currentformat} and \texttt{luamplib.currentmem} to determine the format and the mem file to use.
%
% The rest of this module is not documented. More info can be found in the
% Lua\TeX\ manual, articles in user group journals and the files that
% ship with Con\TeX t.
%
% \begin{macrocode}
function luamplib.load()
local mpx = mplib.new {
ini_version = false,
mem_name = currentmem,
find_file = luamplib.finder
}
if mpx then
luamplib.log("using mem file %s", luamplib.finder(currentmem, 'r', 'mem'))
return mpx, nil
else
return nil, { status = 99, error = "out of memory or invalid format" }
end
end
% \end{macrocode}
%
% \end{macro}
%
% \begin{macrocode}
function luamplib.report(result)
if not result then
luamplib.error("no result object")
elseif result.status > 0 then
local t, e, l, f = result.term, result.error, result.log
if l then
luamplib.log(l)
end
if t then
luamplib.term(t)
end
if e then
if result.status == 1 then
luamplib.warning(e)
else
luamplib.error(e)
end
end
if not t and not e and not l then
if result.status == 1 then
luamplib.warning("unknown error, no error, terminal or log messages, maybe missing beginfig/endfig")
else
luamplib.error("unknown error, no error, terminal or log messages, maybe missing beginfig/endfig")
end
end
else
return true
end
return false
end
function luamplib.process(data)
local converted, result = false, {}
local mpx = luamplib.load()
if mpx and data then
local result = mpx:execute(data)
if luamplib.report(result) then
if result.fig then
converted = luamplib.convert(result)
else
luamplib.warning("no figure output")
end
end
else
luamplib.error("Mem file unloadable. Maybe generated with a different version of mplib?")
end
return converted, result
end
local function getobjects(result,figure,f)
return figure:objects()
end
function luamplib.convert(result, flusher)
luamplib.flush(result, flusher)
return true -- done
end
local function pdf_startfigure(n,llx,lly,urx,ury)
tex.sprint(format("\\mplibstarttoPDF{%s}{%s}{%s}{%s}",llx,lly,urx,ury))
end
local function pdf_stopfigure()
tex.sprint("\\mplibstoptoPDF")
end
function pdf_literalcode(fmt,...) -- table
tex.sprint(format("\\mplibtoPDF{%s}",format(fmt,...)))
end
function pdf_textfigure(font,size,text,width,height,depth)
text = text:gsub(".","\\hbox{%1}") -- kerning happens in metapost
tex.sprint(format("\\mplibtextext{%s}{%s}{%s}{%s}{%s}",font,size,text,0,-( 7200/ 7227)/65536*depth))
end
local bend_tolerance = 131/65536
local rx, sx, sy, ry, tx, ty, divider = 1, 0, 0, 1, 0, 0, 1
local function pen_characteristics(object)
if luamplib.pen_info then
local t = luamplib.pen_info(object)
rx, ry, sx, sy, tx, ty = t.rx, t.ry, t.sx, t.sy, t.tx, t.ty
divider = sx*sy - rx*ry
return not (sx==1 and rx==0 and ry==0 and sy==1 and tx==0 and ty==0), t.width
else
rx, sx, sy, ry, tx, ty, divider = 1, 0, 0, 1, 0, 0, 1
return false, 1
end
end
local function concat(px, py) -- no tx, ty here
return (sy*px-ry*py)/divider,(sx*py-rx*px)/divider
end
local function curved(ith,pth)
local d = pth.left_x - ith.right_x
if abs(ith.right_x - ith.x_coord - d) <= bend_tolerance and abs(pth.x_coord - pth.left_x - d) <= bend_tolerance then
d = pth.left_y - ith.right_y
if abs(ith.right_y - ith.y_coord - d) <= bend_tolerance and abs(pth.y_coord - pth.left_y - d) <= bend_tolerance then
return false
end
end
return true
end
local function flushnormalpath(path,open)
local pth, ith
for i=1,#path do
pth = path[i]
if not ith then
pdf_literalcode("%f %f m",pth.x_coord,pth.y_coord)
elseif curved(ith,pth) then
pdf_literalcode("%f %f %f %f %f %f c",ith.right_x,ith.right_y,pth.left_x,pth.left_y,pth.x_coord,pth.y_coord)
else
pdf_literalcode("%f %f l",pth.x_coord,pth.y_coord)
end
ith = pth
end
if not open then
local one = path[1]
if curved(pth,one) then
pdf_literalcode("%f %f %f %f %f %f c",pth.right_x,pth.right_y,one.left_x,one.left_y,one.x_coord,one.y_coord )
else
pdf_literalcode("%f %f l",one.x_coord,one.y_coord)
end
elseif #path == 1 then
-- special case .. draw point
local one = path[1]
pdf_literalcode("%f %f l",one.x_coord,one.y_coord)
end
return t
end
local function flushconcatpath(path,open)
pdf_literalcode("%f %f %f %f %f %f cm", sx, rx, ry, sy, tx ,ty)
local pth, ith
for i=1,#path do
pth = path[i]
if not ith then
pdf_literalcode("%f %f m",concat(pth.x_coord,pth.y_coord))
elseif curved(ith,pth) then
local a, b = concat(ith.right_x,ith.right_y)
local c, d = concat(pth.left_x,pth.left_y)
pdf_literalcode("%f %f %f %f %f %f c",a,b,c,d,concat(pth.x_coord, pth.y_coord))
else
pdf_literalcode("%f %f l",concat(pth.x_coord, pth.y_coord))
end
ith = pth
end
if not open then
local one = path[1]
if curved(pth,one) then
local a, b = concat(pth.right_x,pth.right_y)
local c, d = concat(one.left_x,one.left_y)
pdf_literalcode("%f %f %f %f %f %f c",a,b,c,d,concat(one.x_coord, one.y_coord))
else
pdf_literalcode("%f %f l",concat(one.x_coord,one.y_coord))
end
elseif #path == 1 then
-- special case .. draw point
local one = path[1]
pdf_literalcode("%f %f l",concat(one.x_coord,one.y_coord))
end
return t
end
% \end{macrocode}
%
% Support for specials in DVI has been removed.
%
% \begin{macrocode}
function luamplib.flush(result,flusher)
if result then
local figures = result.fig
if figures then
for f=1, #figures do
luamplib.info("flushing figure %s",f)
local figure = figures[f]
local objects = getobjects(result,figure,f)
local fignum = tonumber((figure:filename()):match("([%d]+)$") or figure:charcode() or 0)
local miterlimit, linecap, linejoin, dashed = -1, -1, -1, false
local bbox = figure:boundingbox()
local llx, lly, urx, ury = bbox[1], bbox[2], bbox[3], bbox[4] -- faster than unpack
if urx < llx then
-- invalid
pdf_startfigure(fignum,0,0,0,0)
pdf_stopfigure()
else
pdf_startfigure(fignum,llx,lly,urx,ury)
pdf_literalcode("q")
if objects then
for o=1,#objects do
local object = objects[o]
local objecttype = object.type
if objecttype == "start_bounds" or objecttype == "stop_bounds" then
-- skip
elseif objecttype == "start_clip" then
pdf_literalcode("q")
flushnormalpath(object.path,t,false)
pdf_literalcode("W n")
elseif objecttype == "stop_clip" then
pdf_literalcode("Q")
miterlimit, linecap, linejoin, dashed = -1, -1, -1, false
elseif objecttype == "special" then
-- not supported
elseif objecttype == "text" then
local ot = object.transform -- 3,4,5,6,1,2
pdf_literalcode("q %f %f %f %f %f %f cm",ot[3],ot[4],ot[5],ot[6],ot[1],ot[2])
pdf_textfigure(object.font,object.dsize,object.text,object.width,object.height,object.depth)
pdf_literalcode("Q")
else
local cs = object.color
if cs and #cs > 0 then
pdf_literalcode(luamplib.colorconverter(cs))
end
local ml = object.miterlimit
if ml and ml ~= miterlimit then
miterlimit = ml
pdf_literalcode("%f M",ml)
end
local lj = object.linejoin
if lj and lj ~= linejoin then
linejoin = lj
pdf_literalcode("%i j",lj)
end
local lc = object.linecap
if lc and lc ~= linecap then
linecap = lc
pdf_literalcode("%i J",lc)
end
local dl = object.dash
if dl then
local d = format("[%s] %i d",concat(dl.dashes or {}," "),dl.offset)
if d ~= dashed then
dashed = d
pdf_literalcode(dashed)
end
elseif dashed then
pdf_literalcode("[] 0 d")
dashed = false
end
local path = object.path
local transformed, penwidth = false, 1
local open = path and path[1].left_type and path[#path].right_type
local pen = object.pen
if pen then
if pen.type == 'elliptical' then
transformed, penwidth = pen_characteristics(object) -- boolean, value
pdf_literalcode("%f w",penwidth)
if objecttype == 'fill' then
objecttype = 'both'
end
else -- calculated by mplib itself
objecttype = 'fill'
end
end
if transformed then
pdf_literalcode("q")
end
if path then
if transformed then
flushconcatpath(path,open)
else
flushnormalpath(path,open)
end
if objecttype == "fill" then
pdf_literalcode("h f")
elseif objecttype == "outline" then
pdf_literalcode((open and "S") or "h S")
elseif objecttype == "both" then
pdf_literalcode("h B")
end
end
if transformed then
pdf_literalcode("Q")
end
local path = object.htap
if path then
if transformed then
pdf_literalcode("q")
end
if transformed then
flushconcatpath(path,open)
else
flushnormalpath(path,open)
end
if objecttype == "fill" then
pdf_literalcode("h f")
elseif objecttype == "outline" then
pdf_literalcode((open and "S") or "h S")
elseif objecttype == "both" then
pdf_literalcode("h B")
end
if transformed then
pdf_literalcode("Q")
end
end
if cr then
pdf_literalcode(cr)
end
end
end
end
pdf_literalcode("Q")
pdf_stopfigure()
end
end
end
end
end
function luamplib.colorconverter(cr)
local n = #cr
if n == 4 then
local c, m, y, k = cr[1], cr[2], cr[3], cr[4]
return format("%.3f %.3f %.3f %.3f k %.3f %.3f %.3f %.3f K",c,m,y,k,c,m,y,k), "0 g 0 G"
elseif n == 3 then
local r, g, b = cr[1], cr[2], cr[3]
return format("%.3f %.3f %.3f rg %.3f %.3f %.3f RG",r,g,b,r,g,b), "0 g 0 G"
else
local s = cr[1]
return format("%.3f g %.3f G",s,s), "0 g 0 G"
end
end
% \end{macrocode}
%
% \iffalse
%</lua>
% \fi
%
% \subsection{\texttt{luamplib.sty}}
%
% \iffalse
%<*package>
% \fi
%
%
% First we need to load fancyvrb, to define the environment mplibcode.
%
% \begin{macrocode}
\expandafter\ifx\csname ProvidesPackage\endcsname\relax
\input luatextra.sty
\else
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{luamplib}
[2009/03/09 v1.01 mplib package for LuaTeX.]
\RequirePackage{luatextra}
\RequirePackage{fancyvrb}
\fi
% \end{macrocode}
% Loading of lua code.
% \begin{macrocode}
\luaUseModule{luamplib}
% \end{macrocode}
%
%
%
% There are (basically) two formats for metapost: \emph{plain} and \emph{mpfun}. The corresponding \texttt{.mem} files are (at least will be) \texttt{luatex-plain.mem} and \texttt{luatex-mpfun.mem} in \TeX Live. With these functions you can set the format and the mem files that will be used by this package. Warning: the package never generates the mem files, you have to do it by hand, with \texttt{create-mem.lua}.
%
% \begin{macrocode}
\def\mplibsetformat#1{\directlua0{luamplib.setformat([[#1]])}}
\def\mplibsetmemfile#1{\directlua0{luamplib.setmemfile([[#1]])}}
% \end{macrocode}
%
%
% MPLib only works in PDF mode, we don't do anything if we are in DVI mode, and we output a warning.
%
% \begin{macrocode}
\ifnum\pdfoutput>0
\let\mplibtoPDF\pdfliteral
\else
%\def\MPLIBtoPDF#1{\special{pdf:literal direct #1}} % not ok yet
\def\mplibtoPDF#1{}
\expandafter\ifx\csname PackageWarning\endcsname\relax
\write16{}
\write16{Warning: MPLib only works in PDF mode, no figure will be output.}
\write16{}
\else
\PackageWarning{mplib}{MPLib only works in PDF mode, no figure will be output.}
\fi
\fi
% \end{macrocode}
%
% The Plain-specific stuff.
%
% \begin{macrocode}
\expandafter\ifx\csname ProvidesPackage\endcsname\relax
\def\mplibsetupcatcodes{
\catcode`\{=12 \catcode`\}=12 \catcode`\#=12 \catcode`\^=12 \catcode`\~=12
\catcode`\_=12 \catcode`\%=12 \catcode`\&=12 \catcode`\$=12
}
\def\mplibcode{%
\bgroup %
\mplibsetupcatcodes %
\mplibdocode %
}
\long\def\mplibdocode#1\endmplibcode{%
\egroup %
\mplibprocess{#1}%
}
\long\def\mplibprocess#1{%
\luadirect{luamplib.process([[#1]])}%
}
\else
% \end{macrocode}
% The \LaTeX-specific parts. First a Hack for the catcodes in \LaTeX .
% \begin{macrocode}
\makeatletter
\begingroup
\catcode`\,=13
\catcode`\-=13
\gdef\FV@hack{%
\def,{\string,}%
\def-{\string-}%
}
\endgroup
% \end{macrocode}
% In \LaTeX\ (it's not the case in plain\TeX ), we get the metapost code line by line, here is the function handling a line.
% \begin{macrocode}
\newcommand\mplibaddlines[1]{%
\begingroup %
\FV@hack %
\def\FV@ProcessLine##1{%
\luadirect{luamplib.addline([[##1]])}%
}%
\csname FV@SV@#1\endcsname %
\endgroup %
}
\makeatother
% \end{macrocode}
% The \LaTeX\ environment is a modified \texttt{verbatim} environment.
% \begin{macrocode}
\newenvironment{mplibcode}{%
\VerbatimEnvironment %
\begin{SaveVerbatim}{memoire}%
}{%
\end{SaveVerbatim}%
\mplibaddlines{memoire}%
\luadirect{luamplib.processlines()}%
}
\fi
% \end{macrocode}
% We use a dedicated scratchbox.
% \begin{macrocode}
\ifx\mplibscratchbox\undefined \newbox\mplibscratchbox \fi
% \end{macrocode}
% We encapsulate the litterals.
% \begin{macrocode}
\def\mplibstarttoPDF#1#2#3#4{
\hbox\bgroup
\xdef\MPllx{#1}\xdef\MPlly{#2}%
\xdef\MPurx{#3}\xdef\MPury{#4}%
\xdef\MPwidth{\the\dimexpr#3bp-#1bp\relax}%
\xdef\MPheight{\the\dimexpr#4bp-#2bp\relax}%
\parskip0pt%
\leftskip0pt%
\parindent0pt%
\everypar{}%
\setbox\mplibscratchbox\vbox\bgroup
\noindent
}
\def\mplibstoptoPDF{%
\egroup %
\setbox\mplibscratchbox\hbox %
{\hskip-\MPllx bp%
\raise-\MPlly bp%
\box\mplibscratchbox}%
\setbox\mplibscratchbox\vbox to \MPheight
{\vfill
\hsize\MPwidth
\wd\mplibscratchbox0pt%
\ht\mplibscratchbox0pt%
\dp\mplibscratchbox0pt%
\box\mplibscratchbox}%
\wd\mplibscratchbox\MPwidth
\ht\mplibscratchbox\MPheight
\box\mplibscratchbox
\egroup
}
% \end{macrocode}
% Text items have a special handler.
% \begin{macrocode}
\def\mplibtextext#1#2#3#4#5{%
\begingroup
\setbox\mplibscratchbox\hbox
{\font\temp=#1 at #2bp%
\temp
#3}%
\setbox\mplibscratchbox\hbox
{\hskip#4 bp%
\raise#5 bp%
\box\mplibscratchbox}%
\wd\mplibscratchbox0pt%
\ht\mplibscratchbox0pt%
\dp\mplibscratchbox0pt%
\box\mplibscratchbox
\endgroup
}
% \end{macrocode}
%
% \iffalse
%</package>
% \fi
%
% \subsection{\texttt{luamplib-createmem.lua}}
%
% Finally a small standalone file to call with \texttt{texlua} that generates \texttt{luatex-plain.mem} in the current directory. To generate other formats in other names, simply change the last line. After the \texttt{mem} generation, you'll have to install it in a directory searchable by \TeX .
%
% \iffalse
%<*gen-lua>
% \fi
% \begin{macrocode}
kpse.set_program_name("kpsewhich")
function finder (name, mode, ftype)
if mode == "w" then
return name
else
local result = kpse.find_file(name,ftype)
return result
end
end
local preamble = [[
input %s ; dump ;
]]
% \end{macrocode}
% \begin{macro}{makeformat}
%
% \begin{macrocode}
makeformat = function (name, mem_name)
local mpx = mplib.new {
ini_version = true,
find_file = finder,
job_name = mem_name,
}
if mpx then
local result
result = mpx:execute(string.format(preamble,name))
print(string.format("dumping format %s in %s", name, mem_name))
mpx:finish()
end
end
makeformat("plain", "luatex-plain.mem")
% \end{macrocode}
% \end{macro}
% \iffalse
%</gen-lua>
% \fi
% \Finale
\endinput
|