?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
text along path
[PyX/mjg.git] / pyx / dvi / dvifile.py
blobd65e952f2c5988ac57be9844ce7057cef23cc20e
1 # -*- encoding: utf-8 -*-
2 #
3 #
4 # Copyright (C) 2002-2011 Jörg Lehmann <joergl@users.sourceforge.net>
5 # Copyright (C) 2003-2004,2006,2007 Michael Schindler <m-schindler@users.sourceforge.net>
6 # Copyright (C) 2002-2011 André Wobst <wobsta@users.sourceforge.net>
7 #
8 # This file is part of PyX (http://pyx.sourceforge.net/).
9 #
10 # PyX 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 of the License, or
13 # (at your option) any later version.
14 #
15 # PyX 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 PyX; if not, write to the Free Software
22 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
23
24 import cStringIO, math, re, string, struct, sys, warnings
25 from pyx import bbox, canvas, canvasitem, color, epsfile, filelocator, path, reader, trafo, unit
26 import texfont, tfmfile
27
28
29 _DVI_CHARMIN = 0 # typeset a character and move right (range min)
30 _DVI_CHARMAX = 127 # typeset a character and move right (range max)
31 _DVI_SET1234 = 128 # typeset a character and move right
32 _DVI_SETRULE = 132 # typeset a rule and move right
33 _DVI_PUT1234 = 133 # typeset a character
34 _DVI_PUTRULE = 137 # typeset a rule
35 _DVI_NOP = 138 # no operation
36 _DVI_BOP = 139 # beginning of page
37 _DVI_EOP = 140 # ending of page
38 _DVI_PUSH = 141 # save the current positions (h, v, w, x, y, z)
39 _DVI_POP = 142 # restore positions (h, v, w, x, y, z)
40 _DVI_RIGHT1234 = 143 # move right
41 _DVI_W0 = 147 # move right by w
42 _DVI_W1234 = 148 # move right and set w
43 _DVI_X0 = 152 # move right by x
44 _DVI_X1234 = 153 # move right and set x
45 _DVI_DOWN1234 = 157 # move down
46 _DVI_Y0 = 161 # move down by y
47 _DVI_Y1234 = 162 # move down and set y
48 _DVI_Z0 = 166 # move down by z
49 _DVI_Z1234 = 167 # move down and set z
50 _DVI_FNTNUMMIN = 171 # set current font (range min)
51 _DVI_FNTNUMMAX = 234 # set current font (range max)
52 _DVI_FNT1234 = 235 # set current font
53 _DVI_SPECIAL1234 = 239 # special (dvi extention)
54 _DVI_FNTDEF1234 = 243 # define the meaning of a font number
55 _DVI_PRE = 247 # preamble
56 _DVI_POST = 248 # postamble beginning
57 _DVI_POSTPOST = 249 # postamble ending
58
59 _DVI_VERSION = 2 # dvi version
60
61 # position variable indices
62 _POS_H = 0
63 _POS_V = 1
64 _POS_W = 2
65 _POS_X = 3
66 _POS_Y = 4
67 _POS_Z = 5
68
69 # reader states
70 _READ_PRE = 1
71 _READ_NOPAGE = 2
72 _READ_PAGE = 3
73 _READ_POST = 4 # XXX not used
74 _READ_POSTPOST = 5 # XXX not used
75 _READ_DONE = 6
76
77
78 class DVIError(Exception): pass
79
80 # save and restore colors
81
82 class _savecolor(canvasitem.canvasitem):
83 def processPS(self, file, writer, context, registry, bbox):
84 file.write("currentcolor currentcolorspace\n")
85
86 def processPDF(self, file, writer, context, registry, bbox):
87 file.write("q\n")
88
89
90 class _restorecolor(canvasitem.canvasitem):
91 def processPS(self, file, writer, context, registry, bbox):
92 file.write("setcolorspace setcolor\n")
93
94 def processPDF(self, file, writer, context, registry, bbox):
95 file.write("Q\n")
96
97 class _savetrafo(canvasitem.canvasitem):
98 def processPS(self, file, writer, context, registry, bbox):
99 file.write("matrix currentmatrix\n")
100
101 def processPDF(self, file, writer, context, registry, bbox):
102 file.write("q\n")
103
104
105 class _restoretrafo(canvasitem.canvasitem):
106 def processPS(self, file, writer, context, registry, bbox):
107 file.write("setmatrix\n")
108
109 def processPDF(self, file, writer, context, registry, bbox):
110 file.write("Q\n")
111
112
113 class DVIfile:
114
115 def __init__(self, filename, debug=0, debugfile=sys.stdout, singlecharmode=0):
116 """ opens the dvi file and reads the preamble """
117 self.filename = filename
118 self.debug = debug
119 self.debugfile = debugfile
120 self.debugstack = []
121 self.singlecharmode = singlecharmode
122
123 self.fonts = {}
124 self.activefont = None
125
126 # stack of fonts and fontscale currently used (used for VFs)
127 self.fontstack = []
128 self.stack = []
129
130 # pointer to currently active page
131 self.actpage = None
132
133 # stack for self.file, self.fonts and self.stack, needed for VF inclusion
134 self.statestack = []
135
136 self.file = reader.reader(self.filename)
137
138 # currently read byte in file (for debugging output)
139 self.filepos = None
140
141 self._read_pre()
142
143 # helper routines
144
145 def flushtext(self, fontmap):
146 """ finish currently active text object """
147 if self.activetext:
148 x, y, charcodes = self.activetext
149 x_pt, y_pt = x * self.pyxconv, -y*self.pyxconv
150 self.actpage.insert(self.activefont.text_pt(x_pt, y_pt, charcodes, fontmap=fontmap))
151 if self.debug:
152 self.debugfile.write("[%s]\n" % "".join([chr(char) for char in self.activetext[2]]))
153 self.activetext = None
154
155 def putrule(self, height, width, advancepos, fontmap):
156 self.flushtext(fontmap)
157 x1 = self.pos[_POS_H] * self.pyxconv
158 y1 = -self.pos[_POS_V] * self.pyxconv
159 w = width * self.pyxconv
160 h = height * self.pyxconv
161
162 if height > 0 and width > 0:
163 if self.debug:
164 self.debugfile.write("%d: %srule height %d, width %d (???x??? pixels)\n" %
165 (self.filepos, advancepos and "set" or "put", height, width))
166 self.actpage.fill(path.rect_pt(x1, y1, w, h))
167 else:
168 if self.debug:
169 self.debugfile.write("%d: %srule height %d, width %d (invisible)\n" %
170 (self.filepos, advancepos and "set" or "put", height, width))
171
172 if advancepos:
173 if self.debug:
174 self.debugfile.write(" h:=%d+%d=%d, hh:=???\n" %
175 (self.pos[_POS_H], width, self.pos[_POS_H]+width))
176 self.pos[_POS_H] += width * self.scale
177
178 def putchar(self, char, advancepos, id1234, fontmap):
179 dx = advancepos and self.activefont.getwidth_dvi(char) or 0
180
181 if self.debug:
182 self.debugfile.write("%d: %s%s%d h:=%d+%d=%d, hh:=???\n" %
183 (self.filepos,
184 advancepos and "set" or "put",
185 id1234 and "%i " % id1234 or "char",
186 char,
187 self.pos[_POS_H], dx, self.pos[_POS_H]+dx))
188
189 if isinstance(self.activefont, texfont.virtualfont):
190 # virtual font handling
191 afterpos = list(self.pos)
192 afterpos[_POS_H] += dx
193 self._push_dvistring(self.activefont.getchar(char), self.activefont.getfonts(), afterpos,
194 self.activefont.getsize_pt(), fontmap)
195 else:
196 if self.activetext is None:
197 self.activetext = (self.pos[_POS_H], self.pos[_POS_V], [])
198 self.activetext[2].append(char)
199 self.pos[_POS_H] += dx
200
201 if (not advancepos) or self.singlecharmode:
202 self.flushtext(fontmap)
203
204 def usefont(self, fontnum, id1234, fontmap):
205 self.flushtext(fontmap)
206 self.activefont = self.fonts[fontnum]
207 if self.debug:
208 self.debugfile.write("%d: fnt%s%i current font is %s\n" %
209 (self.filepos,
210 id1234 and "%i " % id1234 or "num",
211 fontnum,
212 self.fonts[fontnum].name))
213
214
215 def definefont(self, cmdnr, num, c, q, d, fontname):
216 # cmdnr: type of fontdef command (only used for debugging output)
217 # c: checksum
218 # q: scaling factor (fix_word)
219 # Note that q is actually s in large parts of the documentation.
220 # d: design size (fix_word)
221
222 # check whether it's a virtual font by trying to open it. if this fails, it is an ordinary TeX font
223 try:
224 fontfile = filelocator.open(fontname, [filelocator.format.vf], mode="rb")
225 except IOError:
226 afont = texfont.TeXfont(fontname, c, q/self.tfmconv, d/self.tfmconv, self.tfmconv, self.pyxconv, self.debug>1)
227 else:
228 afont = texfont.virtualfont(fontname, fontfile, c, q/self.tfmconv, d/self.tfmconv, self.tfmconv, self.pyxconv, self.debug>1)
229
230 self.fonts[num] = afont
231
232 if self.debug:
233 self.debugfile.write("%d: fntdef%d %i: %s\n" % (self.filepos, cmdnr, num, fontname))
234
235 # scale = round((1000.0*self.conv*q)/(self.trueconv*d))
236 # m = 1.0*q/d
237 # scalestring = scale!=1000 and " scaled %d" % scale or ""
238 # print ("Font %i: %s%s---loaded at size %d DVI units" %
239 # (num, fontname, scalestring, q))
240 # if scale!=1000:
241 # print " (this font is magnified %d%%)" % round(scale/10)
242
243 def special(self, s, fontmap):
244 x = self.pos[_POS_H] * self.pyxconv
245 y = -self.pos[_POS_V] * self.pyxconv
246 if self.debug:
247 self.debugfile.write("%d: xxx '%s'\n" % (self.filepos, s))
248 if not s.startswith("PyX:"):
249 warnings.warn("ignoring special '%s'" % s)
250 return
251
252 # it is in general not safe to continue using the currently active font because
253 # the specials may involve some gsave/grestore operations
254 self.flushtext(fontmap)
255
256 command, args = s[4:].split()[0], s[4:].split()[1:]
257 if command == "color_begin":
258 if args[0] == "cmyk":
259 c = color.cmyk(float(args[1]), float(args[2]), float(args[3]), float(args[4]))
260 elif args[0] == "gray":
261 c = color.gray(float(args[1]))
262 elif args[0] == "hsb":
263 c = color.hsb(float(args[1]), float(args[2]), float(args[3]))
264 elif args[0] == "rgb":
265 c = color.rgb(float(args[1]), float(args[2]), float(args[3]))
266 elif args[0] == "RGB":
267 c = color.rgb(int(args[1])/255.0, int(args[2])/255.0, int(args[3])/255.0)
268 elif args[0] == "texnamed":
269 try:
270 c = getattr(color.cmyk, args[1])
271 except AttributeError:
272 raise RuntimeError("unknown TeX color '%s', aborting" % args[1])
273 elif args[0] == "pyxcolor":
274 # pyx.color.cmyk.PineGreen or
275 # pyx.color.cmyk(0,0,0,0.0)
276 pat = re.compile(r"(pyx\.)?(color\.)?(?P<model>(cmyk)|(rgb)|(grey)|(gray)|(hsb))[\.]?(?P<arg>.*)")
277 sd = pat.match(" ".join(args[1:]))
278 if sd:
279 sd = sd.groupdict()
280 if sd["arg"][0] == "(":
281 numpat = re.compile(r"[+-]?((\d+\.\d*)|(\d*\.\d+)|(\d+))([eE][+-]\d+)?")
282 arg = tuple([float(x[0]) for x in numpat.findall(sd["arg"])])
283 try:
284 c = getattr(color, sd["model"])(*arg)
285 except TypeError or AttributeError:
286 raise RuntimeError("cannot access PyX color '%s' in TeX, aborting" % " ".join(args[1:]))
287 else:
288 try:
289 c = getattr(getattr(color, sd["model"]), sd["arg"])
290 except AttributeError:
291 raise RuntimeError("cannot access PyX color '%s' in TeX, aborting" % " ".join(args[1:]))
292 else:
293 raise RuntimeError("cannot access PyX color '%s' in TeX, aborting" % " ".join(args[1:]))
294 else:
295 raise RuntimeError("color model '%s' cannot be handled by PyX, aborting" % args[0])
296 self.actpage.insert(_savecolor())
297 self.actpage.insert(c)
298 elif command == "color_end":
299 self.actpage.insert(_restorecolor())
300 elif command == "rotate_begin":
301 self.actpage.insert(_savetrafo())
302 self.actpage.insert(trafo.rotate_pt(float(args[0]), x, y))
303 elif command == "rotate_end":
304 self.actpage.insert(_restoretrafo())
305 elif command == "scale_begin":
306 self.actpage.insert(_savetrafo())
307 self.actpage.insert(trafo.scale_pt(float(args[0]), float(args[1]), x, y))
308 elif command == "scale_end":
309 self.actpage.insert(_restoretrafo())
310 elif command == "epsinclude":
311 # parse arguments
312 argdict = {}
313 for arg in args:
314 name, value = arg.split("=")
315 argdict[name] = value
316
317 # construct kwargs for epsfile constructor
318 epskwargs = {}
319 epskwargs["filename"] = argdict["file"]
320 epskwargs["bbox"] = bbox.bbox_pt(float(argdict["llx"]), float(argdict["lly"]),
321 float(argdict["urx"]), float(argdict["ury"]))
322 if argdict.has_key("width"):
323 epskwargs["width"] = float(argdict["width"]) * unit.t_pt
324 if argdict.has_key("height"):
325 epskwargs["height"] = float(argdict["height"]) * unit.t_pt
326 if argdict.has_key("clip"):
327 epskwargs["clip"] = int(argdict["clip"])
328 self.actpage.insert(epsfile.epsfile(x * unit.t_pt, y * unit.t_pt, **epskwargs))
329 elif command == "marker":
330 if len(args) != 1:
331 raise RuntimeError("marker contains spaces")
332 for c in args[0]:
333 if c not in string.digits + string.letters + "@":
334 raise RuntimeError("marker contains invalid characters")
335 if self.actpage.markers.has_key(args[0]):
336 raise RuntimeError("marker name occurred several times")
337 self.actpage.markers[args[0]] = x * unit.t_pt, y * unit.t_pt
338 else:
339 raise RuntimeError("unknown PyX special '%s', aborting" % command)
340
341 # routines for pushing and popping different dvi chunks on the reader
342
343 def _push_dvistring(self, dvi, fonts, afterpos, fontsize, fontmap):
344 """ push dvi string with defined fonts on top of reader
345 stack. Every positions gets scaled relatively by the factor
346 scale. After interpretating the dvi chunk, continue with self.pos=afterpos.
347 The designsize of the virtual font is passed as a fix_word
348
349 """
350
351 #if self.debug:
352 # self.debugfile.write("executing new dvi chunk\n")
353 self.debugstack.append(self.debug)
354 self.debug = 0
355
356 self.statestack.append((self.file, self.fonts, self.activefont, afterpos, self.stack, self.scale))
357
358 # units in vf files are relative to the size of the font and given as fix_words
359 # which can be converted to floats by diving by 2**20.
360 # This yields the following scale factor for the height and width of rects:
361 self.scale = fontsize/2**20/self.pyxconv
362
363 self.file = reader.stringreader(dvi)
364 self.fonts = fonts
365 self.stack = []
366 self.filepos = 0
367
368 self.usefont(0, 0, fontmap)
369
370 def _pop_dvistring(self, fontmap):
371 self.flushtext(fontmap)
372 #if self.debug:
373 # self.debugfile.write("finished executing dvi chunk\n")
374 self.debug = self.debugstack.pop()
375
376 self.file.close()
377 self.file, self.fonts, self.activefont, self.pos, self.stack, self.scale = self.statestack.pop()
378
379 # routines corresponding to the different reader states of the dvi maschine
380
381 def _read_pre(self):
382 afile = self.file
383 while 1:
384 self.filepos = afile.tell()
385 cmd = afile.readuchar()
386 if cmd == _DVI_NOP:
387 pass
388 elif cmd == _DVI_PRE:
389 if afile.readuchar() != _DVI_VERSION: raise DVIError
390 num = afile.readuint32()
391 den = afile.readuint32()
392 self.mag = afile.readuint32()
393
394 # For the interpretation of the lengths in dvi and tfm files,
395 # three conversion factors are relevant:
396 # - self.tfmconv: tfm units -> dvi units
397 # - self.pyxconv: dvi units -> (PostScript) points
398 # - self.conv: dvi units -> pixels
399 self.tfmconv = (25400000.0/num)*(den/473628672.0)/16.0
400
401 # calculate conv as described in the DVIType docu using
402 # a given resolution in dpi
403 self.resolution = 300.0
404 self.conv = (num/254000.0)*(self.resolution/den)
405
406 # self.pyxconv is the conversion factor from the dvi units
407 # to (PostScript) points. It consists of
408 # - self.mag/1000.0: magstep scaling
409 # - self.conv: conversion from dvi units to pixels
410 # - 1/self.resolution: conversion from pixels to inch
411 # - 72 : conversion from inch to points
412 self.pyxconv = self.mag/1000.0*self.conv/self.resolution*72
413
414 # scaling used for rules when VF chunks are interpreted
415 self.scale = 1
416
417 comment = afile.read(afile.readuchar())
418 return
419 else:
420 raise DVIError
421
422 def readpage(self, pageid=None, fontmap=None):
423 """ reads a page from the dvi file
424
425 This routine reads a page from the dvi file which is
426 returned as a canvas. When there is no page left in the
427 dvifile, None is returned and the file is closed properly."""
428
429 while 1:
430 self.filepos = self.file.tell()
431 cmd = self.file.readuchar()
432 if cmd == _DVI_NOP:
433 pass
434 elif cmd == _DVI_BOP:
435 ispageid = [self.file.readuint32() for i in range(10)]
436 if pageid is not None and ispageid != pageid:
437 raise DVIError("invalid pageid")
438 if self.debug:
439 self.debugfile.write("%d: beginning of page %i\n" % (self.filepos, ispageid[0]))
440 self.file.readuint32()
441 break
442 elif cmd == _DVI_POST:
443 self.file.close()
444 return None # nothing left
445 else:
446 raise DVIError
447
448 self.actpage = canvas.canvas()
449 self.actpage.markers = {}
450 self.pos = [0, 0, 0, 0, 0, 0]
451
452 # tuple (hpos, vpos, codepoints) to be output, or None if no output is pending
453 self.activetext = None
454
455 while 1:
456 afile = self.file
457 self.filepos = afile.tell()
458 try:
459 cmd = afile.readuchar()
460 except struct.error:
461 # we most probably (if the dvi file is not corrupt) hit the end of a dvi chunk,
462 # so we have to continue with the rest of the dvi file
463 self._pop_dvistring(fontmap)
464 continue
465 if cmd == _DVI_NOP:
466 pass
467 if cmd >= _DVI_CHARMIN and cmd <= _DVI_CHARMAX:
468 self.putchar(cmd, True, 0, fontmap)
469 elif cmd >= _DVI_SET1234 and cmd < _DVI_SET1234 + 4:
470 self.putchar(afile.readint(cmd - _DVI_SET1234 + 1), True, cmd-_DVI_SET1234+1, fontmap)
471 elif cmd == _DVI_SETRULE:
472 self.putrule(afile.readint32()*self.scale, afile.readint32()*self.scale, True, fontmap)
473 elif cmd >= _DVI_PUT1234 and cmd < _DVI_PUT1234 + 4:
474 self.putchar(afile.readint(cmd - _DVI_PUT1234 + 1), False, cmd-_DVI_SET1234+1, fontmap)
475 elif cmd == _DVI_PUTRULE:
476 self.putrule(afile.readint32()*self.scale, afile.readint32()*self.scale, False, fontmap)
477 elif cmd == _DVI_EOP:
478 self.flushtext(fontmap)
479 if self.debug:
480 self.debugfile.write("%d: eop\n \n" % self.filepos)
481 return self.actpage
482 elif cmd == _DVI_PUSH:
483 self.stack.append(list(self.pos))
484 if self.debug:
485 self.debugfile.write("%s: push\n"
486 "level %d:(h=%d,v=%d,w=%d,x=%d,y=%d,z=%d,hh=???,vv=???)\n" %
487 ((self.filepos, len(self.stack)-1) + tuple(self.pos)))
488 elif cmd == _DVI_POP:
489 self.flushtext(fontmap)
490 self.pos = self.stack.pop()
491 if self.debug:
492 self.debugfile.write("%s: pop\n"
493 "level %d:(h=%d,v=%d,w=%d,x=%d,y=%d,z=%d,hh=???,vv=???)\n" %
494 ((self.filepos, len(self.stack)) + tuple(self.pos)))
495 elif cmd >= _DVI_RIGHT1234 and cmd < _DVI_RIGHT1234 + 4:
496 self.flushtext(fontmap)
497 dh = afile.readint(cmd - _DVI_RIGHT1234 + 1, 1) * self.scale
498 if self.debug:
499 self.debugfile.write("%d: right%d %d h:=%d%+d=%d, hh:=???\n" %
500 (self.filepos,
501 cmd - _DVI_RIGHT1234 + 1,
502 dh,
503 self.pos[_POS_H],
504 dh,
505 self.pos[_POS_H]+dh))
506 self.pos[_POS_H] += dh
507 elif cmd == _DVI_W0:
508 self.flushtext(fontmap)
509 if self.debug:
510 self.debugfile.write("%d: w0 %d h:=%d%+d=%d, hh:=???\n" %
511 (self.filepos,
512 self.pos[_POS_W],
513 self.pos[_POS_H],
514 self.pos[_POS_W],
515 self.pos[_POS_H]+self.pos[_POS_W]))
516 self.pos[_POS_H] += self.pos[_POS_W]
517 elif cmd >= _DVI_W1234 and cmd < _DVI_W1234 + 4:
518 self.flushtext(fontmap)
519 self.pos[_POS_W] = afile.readint(cmd - _DVI_W1234 + 1, 1) * self.scale
520 if self.debug:
521 self.debugfile.write("%d: w%d %d h:=%d%+d=%d, hh:=???\n" %
522 (self.filepos,
523 cmd - _DVI_W1234 + 1,
524 self.pos[_POS_W],
525 self.pos[_POS_H],
526 self.pos[_POS_W],
527 self.pos[_POS_H]+self.pos[_POS_W]))
528 self.pos[_POS_H] += self.pos[_POS_W]
529 elif cmd == _DVI_X0:
530 self.flushtext(fontmap)
531 if self.debug:
532 self.debugfile.write("%d: x0 %d h:=%d%+d=%d, hh:=???\n" %
533 (self.filepos,
534 self.pos[_POS_X],
535 self.pos[_POS_H],
536 self.pos[_POS_X],
537 self.pos[_POS_H]+self.pos[_POS_X]))
538 self.pos[_POS_H] += self.pos[_POS_X]
539 elif cmd >= _DVI_X1234 and cmd < _DVI_X1234 + 4:
540 self.flushtext(fontmap)
541 self.pos[_POS_X] = afile.readint(cmd - _DVI_X1234 + 1, 1) * self.scale
542 if self.debug:
543 self.debugfile.write("%d: x%d %d h:=%d%+d=%d, hh:=???\n" %
544 (self.filepos,
545 cmd - _DVI_X1234 + 1,
546 self.pos[_POS_X],
547 self.pos[_POS_H],
548 self.pos[_POS_X],
549 self.pos[_POS_H]+self.pos[_POS_X]))
550 self.pos[_POS_H] += self.pos[_POS_X]
551 elif cmd >= _DVI_DOWN1234 and cmd < _DVI_DOWN1234 + 4:
552 self.flushtext(fontmap)
553 dv = afile.readint(cmd - _DVI_DOWN1234 + 1, 1) * self.scale
554 if self.debug:
555 self.debugfile.write("%d: down%d %d v:=%d%+d=%d, vv:=???\n" %
556 (self.filepos,
557 cmd - _DVI_DOWN1234 + 1,
558 dv,
559 self.pos[_POS_V],
560 dv,
561 self.pos[_POS_V]+dv))
562 self.pos[_POS_V] += dv
563 elif cmd == _DVI_Y0:
564 self.flushtext(fontmap)
565 if self.debug:
566 self.debugfile.write("%d: y0 %d v:=%d%+d=%d, vv:=???\n" %
567 (self.filepos,
568 self.pos[_POS_Y],
569 self.pos[_POS_V],
570 self.pos[_POS_Y],
571 self.pos[_POS_V]+self.pos[_POS_Y]))
572 self.pos[_POS_V] += self.pos[_POS_Y]
573 elif cmd >= _DVI_Y1234 and cmd < _DVI_Y1234 + 4:
574 self.flushtext(fontmap)
575 self.pos[_POS_Y] = afile.readint(cmd - _DVI_Y1234 + 1, 1) * self.scale
576 if self.debug:
577 self.debugfile.write("%d: y%d %d v:=%d%+d=%d, vv:=???\n" %
578 (self.filepos,
579 cmd - _DVI_Y1234 + 1,
580 self.pos[_POS_Y],
581 self.pos[_POS_V],
582 self.pos[_POS_Y],
583 self.pos[_POS_V]+self.pos[_POS_Y]))
584 self.pos[_POS_V] += self.pos[_POS_Y]
585 elif cmd == _DVI_Z0:
586 self.flushtext(fontmap)
587 if self.debug:
588 self.debugfile.write("%d: z0 %d v:=%d%+d=%d, vv:=???\n" %
589 (self.filepos,
590 self.pos[_POS_Z],
591 self.pos[_POS_V],
592 self.pos[_POS_Z],
593 self.pos[_POS_V]+self.pos[_POS_Z]))
594 self.pos[_POS_V] += self.pos[_POS_Z]
595 elif cmd >= _DVI_Z1234 and cmd < _DVI_Z1234 + 4:
596 self.flushtext(fontmap)
597 self.pos[_POS_Z] = afile.readint(cmd - _DVI_Z1234 + 1, 1) * self.scale
598 if self.debug:
599 self.debugfile.write("%d: z%d %d v:=%d%+d=%d, vv:=???\n" %
600 (self.filepos,
601 cmd - _DVI_Z1234 + 1,
602 self.pos[_POS_Z],
603 self.pos[_POS_V],
604 self.pos[_POS_Z],
605 self.pos[_POS_V]+self.pos[_POS_Z]))
606 self.pos[_POS_V] += self.pos[_POS_Z]
607 elif cmd >= _DVI_FNTNUMMIN and cmd <= _DVI_FNTNUMMAX:
608 self.usefont(cmd - _DVI_FNTNUMMIN, 0, fontmap)
609 elif cmd >= _DVI_FNT1234 and cmd < _DVI_FNT1234 + 4:
610 # note that according to the DVI docs, for four byte font numbers,
611 # the font number is signed. Don't ask why!
612 fntnum = afile.readint(cmd - _DVI_FNT1234 + 1, cmd == _DVI_FNT1234 + 3)
613 self.usefont(fntnum, cmd-_DVI_FNT1234+1, fontmap)
614 elif cmd >= _DVI_SPECIAL1234 and cmd < _DVI_SPECIAL1234 + 4:
615 self.special(afile.read(afile.readint(cmd - _DVI_SPECIAL1234 + 1)), fontmap)
616 elif cmd >= _DVI_FNTDEF1234 and cmd < _DVI_FNTDEF1234 + 4:
617 if cmd == _DVI_FNTDEF1234:
618 num = afile.readuchar()
619 elif cmd == _DVI_FNTDEF1234+1:
620 num = afile.readuint16()
621 elif cmd == _DVI_FNTDEF1234+2:
622 num = afile.readuint24()
623 elif cmd == _DVI_FNTDEF1234+3:
624 # Cool, here we have according to docu a signed int. Why?
625 num = afile.readint32()
626 self.definefont(cmd-_DVI_FNTDEF1234+1,
627 num,
628 afile.readint32(),
629 afile.readint32(),
630 afile.readint32(),
631 afile.read(afile.readuchar()+afile.readuchar()))
632 else:
633 raise DVIError
Michael J Gruber's PyX tree