Install Now
dv2dt - convert a binary TeX DVI file to DTL text representation
Contents
Description
dv2dt converts a binary TeX DVI file to an editable text file in DTL (DVITextLanguage) format. The
companion dt2dv(1) utility can convert the DTL file back to a binary DVI file.
Dtl Command Description
A DTL file contains one line per command, with a limit of 1024 characters per line. Each command
contains a symbolic operation name, followed by zero or more parameter values. The parameter value
descriptions are not repeated here; they can be found in the previous section.
variety <variety-name>
This command specifies the name of the DTL file type; it has no DVI file equivalent.
(text) Series of set_char commands, for printable ASCII text.
\( Literal ASCII left parenthesis in (text).
\) Literal ASCII right parenthesis in (text).
\\ Literal ASCII backslash in (text).
\" Literal ASCII double quote in (text).
\XY Set_char for character with hexadecimal code XY, not in parentheses, but by itself
for readability.
s1,s2,s2,s3 Set, with (1,2,3,4)-byte charcodes.
srset_rule.
p1,p2,p2,p3 Put, with (1,2,3,4)-byte charcodes.
prput_rule.
nopnop (do nothing).
bopbop (beginning of page).
eopeop (end of page).
[ Push.
] Pop.
r1,r2,r3,r4 Right, with (1,2,3,4)-byte argument.
w0,w1,w2,w3,w4 As in DVI.
x0,x1,x2,x3,x4 As in DVI.
d1,d2,d3,d4 Down, with (1,2,3,4)-byte argument.
y0,y1,y2,y3,y4 As in DVI.
z0,z1,z2,z3,z4 As in DVI.
fnfnt_num (set current font to font number in 0 to 63).
f1,f2,f3,f4fnt (set current font to (1,2,3,4)-byte font number).
specialxxx (special commands with (1,2,3,4)-byte string length).
fdfnt_def (assign a number to a named font).
pre Preamble.
postpost (begin postamble).
post_postpost_post (end postamble).
opcode Undefined DVI command (250 to 255).
Dvi Command Description
TeX DVI files contain a compact binary description of typeset pages, as a stream of operation code bytes,
each immediately followed by zero or more parameter bytes. The format of DVI files is fully described in
Donald E. Knuth, TeX:TheProgram, Addison-Wesley (1986), ISBN 0-201-13437-3, as well as in the
dvitype(1) literate program source code.
For convenience, we provide a summary of DVI commands here. In the following list, operation code bytes
are given as unsigned decimal values, followed by their symbolic names (not present in the DVI file), and
a short description. A designation like b[+n] means that the operation code byte is followed by a
parameter b which uses n bytes, and is signed. Without the plus sign, the parameter is unsigned. Signed
integer parameter values are always represented in two's complement arithmetic, which is the system
followed by most computers manufactured today, including all personal computers and workstations.
0set_char_0 Set character 0 from current font.
...127set_char_127 Set character 127 from current font.
128set1c[1] Set 1-byte unsigned character (uchar) number c.
129set2c[2] Set 2-byte uchar number c.
130set3c[3] Set 3-byte uchar number c.
131set4c[+4] Set 4-byte signed character (schar) number c.
132set_rulea[+4]b[+4]
Set rule, height a, width b.
133put1c[1] Put 1-byte uchar c.
134put2c[2] Put 2-byte uchar c.
135put3c[3] Put 3-byte uchar c.
136put4c[+4] Put 4-byte schar c.
137put_rulea[+4]b[+4]
Put rule, height a, width b.
138nop Do nothing.
139bopc0[+4]...c9[+4]p[+4]
Beginning of page. The parameters c0...c9 are the TeX page counters, the contents
of TeX count registers \count0...\count9. The parameter p is the byte offset from
the beginning of the DVI file of the previous bop operation code byte. The first such
command in the file has p=-1.
140eop End of page.
141push Push (h,v,w,x,y,z) onto stack.
142pop Pop (h,v,w,x,y,z) from stack.
143right1b[+1]
Move right b units.
144right2b[+2]
Move right b units.
145right3b[+3]
Move right b units.
146right4b[+4]
Move right b units.
147w0 Move right w units.
148w1b[+1] Move right b units, and set w=b.
149w2b[+2] Move right b units, and set w=b.
150w3b[+3] Move right b units, and set w=b.
151w4b[+4] Move right b units, and set w=b.
152x0 Move right x units.
153x1b[+1] Move right b units, and set x=b.
154x2b[+2] Move right b units, and set x=b.
155x3b[+3] Move right b units, and set x=b.
156x4b[+4] Move right b units, and set x=b.
157down1a[+1] Move down a units.
158down2a[+2] Move down a units.
159down3a[+3] Move down a units.
160down4a[+4] Move down a units.
161y0 Move right y units.
162y1a[+1] Move right a units, and set y=a.
163y2a[+2] Move right a units, and set y=a.
164y3a[+3] Move right a units, and set y=a.
165y4a[+4] Move right a units, and set y=a.
166z0 Move right z units.
167z1a[+1] Move right a units, and set z=a.
168z2a[+2] Move right a units, and set z=a.
169z3a[+3] Move right a units, and set z=a.
170z4a[+4] Move right a units, and set z=a.
171fnt_num_0 Set current font number (f)=0.
...234fnt_num_63 Set f=63.
235fnt1k[1] Set f=k.
236fnt2k[2] Set f=k.
237fnt3k[3] Set f=k.
238fnt4k[+4] Set f=k.
239xxx1k[1]x[k]
Special string x with k bytes.
240xxx2k[2]x[k]
Special string x with k bytes.
241xxx3k[3]x[k]
Special string x with k bytes.
242xxx4k[4]x[k]
Special string x with (unsigned) k bytes.
243fnt_def1k[1]c[4]s[4]d[4]a[1]l[1]n[a+l]
Define font k. The parameters are:
c Checksum for TFM file.
s Scale factor, in DVI units.
d Design size, in DVI units.
a Length of the ``area'' or directory.
l Length of the font name.
n Area and font name string(s).
244fnt_def2k[2]c[4]s[4]d[4]a[1]l[1]n[a+l]
Define font k.
245fnt_def3k[3]c[4]s[4]d[4]a[1]l[1]n[a+l]
Define font k.
246fnt_def4k[+4]c[4]s[4]d[4]a[1]l[1]n[a+l]
Define font k.
247prei[1]num[4]den[4]mag[4]k[1]x[k]
Begin preamble. The parameters are:
i DVI format. Standard TeX has ID=2, and TeX-XeT has ID=3.
num Numerator of 100 nm / DVI unit.
den Denominator of 100 nm / DVI unit.
mag 1000 * magnification.
k Comment length.
x Comment string.
248postp[4]num[4]den[4]mag[4]l[4]u[4]s[2]t[2]
Begin postamble. The parameters are:
p Pointer to final bop.
num,den,mag
Duplicates of values in preamble.
l Height-plus-depth of tallest page, in DVI units.
u Width of widest page, in DVI units.
s Maximum stack depth needed to process this DVI file.
t Total number of pages (bop commands) present.
249post_postq[4]i[1]223...223
End postamble. The parameters are:
q Byte offset from the beginning of the DVI file to the post command that started
the postamble.
i DVI format ID, as in the preamble.
223 At least four 223 bytes.
250 Undefined.
...255 Undefined.
Files
*.dvi binary TeX DVI file.
*.dtl text representation of a TeX DVI file in DVITextLanguage format.
Name
dv2dt - convert a binary TeX DVI file to DTL text representation
Sample Dtl File
The following 2-line TeX file
Hello.
\bye
when processed with the commands
tex hello.tex
dv2dt hello.dvi hello.dtl
produces this DTL file:
variety sequences-6
pre 2 25400000 473628672 1000 27 ' TeX output 1995.03.02:2334'
bop 1 0 0 0 0 0 0 0 0 0 -1
[
d3 -917504
]
d4 42152922
[
d4 -41497562
[
r3 1310720
fd1 0 11374260171 655360 655360 0 5 '' 'cmr10'
fn0
(Hello.)
]
]
d3 1572864
[
r4 15229091
(1)
]
eop
post 42 25400000 473628672 1000 43725786 30785863 2 1
fd1 0 11374260171 655360 655360 0 5 'cmr10'
post_post 152 2 223 223 223 223
The command
dt2dv hello.dtl hello.dvi
will reconstruct the original DVI file.
See Also
dt2dv(1), dvitype(1), tex(1).
Synopsis
dv2dtinput-DVI-fileoutput-DTL-file
If the filenames are omitted, then stdin and stdout are assumed.
PNG Icons
