2 # -*- coding: ISO-8859-1 -*-
5 # Copyright (C) 2002, 2003 Jörg Lehmann <joergl@users.sourceforge.net>
6 # Copyright (C) 2002, 2003 André Wobst <wobsta@users.sourceforge.net>
8 # This file is part of PyX (http://pyx.sourceforge.net/).
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 import base
, bbox
, canvas
, prolog
, unit
, trafo
27 # PostScript-procedure definitions (cf. 5002.EPSF_Spec_v3.0.pdf)
28 # with important correction in EndEPSF:
29 # end operator is missing in the spec!
31 _BeginEPSF
= prolog
.definition("BeginEPSF", """{
32 /b4_Inc_state save def
33 /dict_count countdictstack def
34 /op_count count 1 sub def
37 0 setgray 0 setlinecap
38 1 setlinewidth 0 setlinejoin
39 10 setmiterlimit [ ] 0 setdash newpath
43 {false setstrokeadjust false setoverprint
48 _EndEPSF
= prolog
.definition("EndEPSF", """{
50 count op_count sub {pop} repeat
51 countdictstack dict_count sub {end} repeat
55 def _readbbox(filename
):
56 """returns bounding box of EPS file filename as 4-tuple (llx, lly, urx, ury)"""
59 file = open(filename
, "r")
61 raise IOError, "cannot open EPS file '%s'" % filename
63 bbpattern
= re
.compile( r
"""^%%BoundingBox:\s+([+-]?\d+)
66 \s+([+-]?\d+)\s*$""" , re
.VERBOSE
)
68 for line
in file.xreadlines():
70 if line
=="%%EndComments\n":
71 # XXX: BoundingBox-Deklaration kann auch an Ende von Datei
72 # verschoben worden sein...
73 # ...but evaluation of such a bbox directive requires
74 # a parsing of the DSC!
76 "bounding box not found in header of EPS file '%s'" % \
79 bbmatch
= bbpattern
.match(line
)
80 if bbmatch
is not None:
81 # conversion strings->int
82 (llx
, lly
, urx
, ury
) = map(int, bbmatch
.groups())
83 return bbox
._bbox
(llx
, lly
, urx
, ury
)
86 "bounding box not found in EPS file '%s'" % filename
89 class epsfile(base
.PSCmd
):
91 """class for epsfiles"""
95 width
=None, height
=None, scale
=None,
103 inserts EPS file named filename at position (x,y). If clip is
104 set, the result gets clipped to the bbox of the EPS file. If
105 translatebbox is not set, the EPS graphics is not translated to
106 the corresponding origin. With showbb set, the bbox is drawn.
107 If bbox is specified, it overrides the bounding box in the epsfile
112 self
._x
= unit
.topt(x
)
113 self
._y
= unit
.topt(y
)
114 self
.filename
= filename
115 self
.mybbox
= bbox
or _readbbox(self
.filename
)
117 # determine scaling in x and y direction
118 self
.scalex
= self
.scaley
= scale
120 if width
is not None or height
is not None:
121 if scale
is not None:
122 raise ValueError("cannot set both width and/or height and scale simultaneously")
123 if height
is not None:
124 self
.scaley
= unit
.topt(height
)/(self
.mybbox
.ury
-self
.mybbox
.lly
)
125 if width
is not None:
126 self
.scalex
= unit
.topt(width
)/(self
.mybbox
.urx
-self
.mybbox
.llx
)
128 if self
.scalex
is None:
129 self
.scalex
= self
.scaley
130 if self
.scaley
is None:
131 self
.scaley
= self
.scalex
133 # set the actual width and height of the eps file (after a
135 self
._width
= (self
.mybbox
.urx
-self
.mybbox
.llx
)
137 self
._width
*= self
.scalex
139 self
._height
= (self
.mybbox
.ury
-self
.mybbox
.lly
)
141 self
._height
*= self
.scaley
143 # take alignment into account
145 if self
.align
[0]=="b":
147 elif self
.align
[0]=="c":
148 self
._y
-= self
._height
/2.0
149 elif self
.align
[0]=="t":
150 self
._y
-= self
._height
152 raise ValueError("vertical alignment can only be b (bottom), c (center), or t (top)")
154 if self
.align
[1]=="l":
156 elif self
.align
[1]=="c":
157 self
._x
-= self
._width
/2.0
158 elif self
.align
[1]=="r":
159 self
._x
-= self
._width
161 raise ValueError("horizontal alignment can only be l (left), c (center), or r (right)")
164 self
.translatebbox
= translatebbox
165 self
.showbbox
= showbbox
167 self
.trafo
= trafo
._translate
(self
._x
, self
._y
)
169 if self
.scalex
is not None:
170 self
.trafo
= self
.trafo
* trafo
._scale
(self
.scalex
, self
.scaley
)
173 self
.trafo
= self
.trafo
* trafo
._translate
(-self
.mybbox
.llx
, -self
.mybbox
.lly
)
176 return self
.mybbox
.transformed(self
.trafo
)
179 return [_BeginEPSF
, _EndEPSF
]
181 def write(self
, file):
183 epsfile
=open(self
.filename
,"r")
185 raise IOError, "cannot open EPS file '%s'" % self
.filename
187 file.write("BeginEPSF\n")
189 bbrect
= self
.mybbox
.rect().transformed(self
.trafo
)
192 canvas
._newpath
().write(file)
194 canvas
._stroke
().write(file)
197 canvas
._newpath
().write(file)
199 canvas
._clip
().write(file)
201 self
.trafo
.write(file)
203 file.write("%%%%BeginDocument: %s\n" % self
.filename
)
204 file.write(epsfile
.read())
205 file.write("%%EndDocument\n")
206 file.write("EndEPSF\n")