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
|
%D \module
%D [ file=mptopdf,
%D version=2000.03.27,
%D title=\METAPOST,
%D subtitle=conversion to \PDF,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
%D The file \type {mptopdf} provides a quick way to convert
%D \METAPOST\ files to \PDF\ using a slightly stripped down
%D plain \TEX, \PDFTEX, and a few \CONTEXT\ modules.
%D
%D First generate a format, which in \WEBC\ looks like:
%D
%D \starttyping
%D pdftex --ini mptopdf
%D \stoptyping
%D
%D or:
%D
%D \starttyping
%D texexec --make --tex=pdftex --format=mptopdf --alone
%D \stoptyping
%D
%D Since this conversion only works with \PDFTEX\ or \PDFETEX,
%D the session is aborted when another \TEX\ is used. When
%D finished, the resulting \type {fmt} file should be moved to
%D the right location.
%D
%D The conversion itself is accomplished by:
%D
%D \starttyping
%D pdftex &mptopdf \relax filename.number
%D \stoptyping
%D
%D The \type {\relax} is needed since we don't want to process
%D the file directly. Instead we pick up the filename using
%D \type {\everypar}. Since this file is still the first one
%D we load, although delayed, the jobname is as we expect. So,
%D at least in \WEBC, the result of the conversion comes
%D available in the file \type {filename.pdf}. This conversion
%D process is roughly compatible with:
%D
%D \starttyping
%D texexec --pdf --fig=c --result=filename filename.number
%D \stoptyping
%D
%D This uses \CONTEXT, and is therefore slower. Therefore,
%D we provide a small \PERL\ script that does a faster job,
%D using the minimal format. Given that a format is
%D generated, one can say:
%D
%D \starttyping
%D mptopdf somefile
%D mptopdf somefile.123
%D mptopdf mp*.*
%D \stoptyping
%D
%D The results are copied into files named \type
%D {somefile-number}. This mechanism will also be available
%D in a next release of \TEXUTIL.
%D The \TEX\ implementation is rather simple, since we use some
%D generic \CONTEXT\ modules. Because we need a few register
%D allocation macros, we preload plain \TEX. We don't load
%D fonts yet.
\input syst-tex.mkii
%D We check for the usage of \PDFTEX, and quit if another
%D \TEX\ is used.
\ifx\pdfoutput\undefined
\message{Sorry, you should use pdf(e)TeX instead.}
\expandafter \endinput
\fi
%D The conversion to \PDF\ is carried out by macros, that
%D are collected in the file:
\input supp-mis.mkii
\input supp-pdf.mkii
\input supp-mpe.mkii \MPcmykcolorstrue \MPspotcolorstrue
%D We use no output routine.
\output{}
%D Since we need to calculate and set the bounding box,
%D we definitely don't want to indent paragraphs.
\parindent=0pt
%D We use \type {\everypar} to pick up the filename and
%D process the \METAPOST\ graphic.
\everypar{\processMPfile}
%D The main macro shows a few \PDFTEX\ primitives. The main
%D work is done by the macro \type {\convertMPtoPDF} which is
%D defined in \type supp-pdf}. This macro interprets the
%D \METAPOST\ file. Close reading of this macro will probably
%D learn a few (\PDF) tricks. Apart from some path
%D transformations, which are needed since \PDF\ has a
%D different vision on paths, the graphic is positioned in
%D such a way that accuracy in \PDF\ xforms is guaranteed.
\ifx\makeMPintoPDFobject\undefined \newcount\makeMPintoPDFobject \fi
\def\processMPfile#1 %
{\pdfoutput=1
\pdfpkresolution600
\pdfcompresslevel=9
\makeMPintoPDFobject=1
\hsize=100in
\vsize=\hsize
\hoffset=-1in
\voffset=\hoffset
\topskip=0pt
\setbox0=\vbox{\convertMPtoPDF{#1}{1}{1}}%
\ifdim\wd0<1in \message{[warning: the width is less than 1in]}\fi
\ifdim\ht0<1in \message{[warning: the height is less than 1in]}\fi
\pdfpageheight=\ht0
\pdfpagewidth=\wd0
\box0
\bye}
%D The \type {\chardef} forces the converter to build a so
%D called xform object. This is needed in case the graphic
%D uses special trickery, like shading.
%D Since \ACROBAT\ has troubles with figures smaller than
%D 1~inch, we issue a warning. When embedding graphics in
%D documents, a size less that 1~inch does not harm. In
%D order to overload runtime directives in the \PDFTEX\
%D configuration file, we set the offsets and output method
%D in the macro.
%D
%D The resulting \PDF\ file is about as efficient as such a
%D self contained file can be. However, if needed, this \PDF\
%D file can be converted to \EPS\ using for instance the
%D \PDFTOPS\ program (in \WEBC) or \GHOSTSCRIPT.
%D A few helpers:
{\catcode`\.=12
\catcode`\p=12
\catcode`\t=12
\gdef\WITHOUTPT#1pt{#1}}
\def\withoutpt#1%
{\expandafter\WITHOUTPT#1}
\def\negatecolorcomponent#1% #1 = \macro
{\scratchdimen1pt\advance\scratchdimen-#1\onepoint
\ifdim\scratchdimen<\zeropoint\scratchdimen\zeropoint\fi
\edef#1{\withoutpt\the\scratchdimen}}
\let\negatedcolorcomponent\firstofoneargument
\def\negatedcolorcomponent#1%
{\ifdim\dimexpr1pt-#1pt\relax<\zeropoint
0pt%
\else
\expandafter\withoutpt\the\dimexpr1pt-#1pt\relax
\fi}
\def\negatecolorcomponent#1% #1 = \macro
{\edef#1{\negatedcolorcomponent{#1}}}
\countdef\realpageno=0 % to satisfy mkiv status reports
\dump
|
