def processPS(self, file, writer, context, registry, bbox):
# process pattern, letting it register its resources and calculate the bbox of the pattern
patternfile = cStringIO.StringIO()
realpatternbbox = bboxmodule.empty()
canvas.canvas.processPS(self, patternfile, writer, pswriter.context(),
registry, realpatternbbox)
patternproc = patternfile.getvalue()
patternfile.close()
if self.xstep is None:
xstep = unit.topt(realpatternbbox.width())
else:
xstep = unit.topt(self.xstep)
if self.ystep is None:
ystep = unit.topt(realpatternbbox.height())
else:
ystep = unit.topt(self.ystep)
if not xstep:
raise ValueError("xstep in pattern cannot be zero")
if not ystep:
raise ValueError("ystep in pattern cannot be zero")
patternbbox = self.patternbbox or realpatternbbox.enlarged(
self.bboxenlarge)
patternprefix = "\n".join(
("<<", "/PatternType %d" % self.patterntype, "/PaintType %d" %
self.painttype, "/TilingType %d" % self.tilingtype,
"/BBox [%g %g %g %g]" % patternbbox.highrestuple_pt(),
"/XStep %g" % xstep, "/YStep %g" % ystep,
"/PaintProc {\nbegin\n"))
patterntrafostring = self.patterntrafo is None and "matrix" or str(
self.patterntrafo)
patternsuffix = "end\n} bind\n>>\n%s\nmakepattern" % patterntrafostring
registry.add(
pswriter.PSdefinition(
self.id, "".join((patternprefix, patternproc, patternsuffix))))
# activate pattern
file.write("%s setpattern\n" % self.id)
import os, string, tempfile, warnings
import canvasitem, bbox, filelocator, unit, trafo, pswriter
# PostScript-procedure definitions (cf. 5002.EPSF_Spec_v3.0.pdf)
# with important correction in EndEPSF:
# end operator is missing in the spec!
_BeginEPSF = pswriter.PSdefinition("BeginEPSF", """{
/b4_Inc_state save def
/dict_count countdictstack def
/op_count count 1 sub def
userdict begin
/showpage { } def
0 setgray 0 setlinecap
1 setlinewidth 0 setlinejoin
10 setmiterlimit [ ] 0 setdash newpath
/languagelevel where
{pop languagelevel
1 ne
{false setstrokeadjust false setoverprint
} if
} if
} bind""")
_EndEPSF = pswriter.PSdefinition("EndEPSF", """{
end
count op_count sub {pop} repeat
countdictstack dict_count sub {end} repeat
b4_Inc_state restore
} bind""")
def processPS(self, file, writer, context, registry, bbox):
if self.PSstoreimage and not self.PSsinglestring:
registry.add(
pswriter.PSdefinition(
"imagedataaccess",
"{ /imagedataindex load " # get list index
"dup 1 add /imagedataindex exch store " # store increased index
"/imagedataid load exch get }")
) # select string from array
if self.PSstoreimage:
registry.add(
PSimagedata(self.PSimagename, self.data, self.PSsinglestring,
self.PSmaxstrlen))
bbox += self.bbox()
file.write("gsave\n")
if self.palettedata is not None:
file.write("[ /Indexed %s %i\n" %
(self.palettecolorspace, len(self.palettedata) / 3 - 1))
file.write("%%%%BeginData: %i ASCII Lines\n" %
ascii85lines(len(self.palettedata)))
file.write("<~")
ascii85stream(file, self.palettedata)
file.write("~>\n" "%%EndData\n")
file.write("] setcolorspace\n")
else:
file.write("%s setcolorspace\n" % self.colorspace)
if self.PSstoreimage and not self.PSsinglestring:
file.write(
"/imagedataindex 0 store\n" # not use the stack since interpreters differ in their stack usage
"/imagedataid %s store\n" % self.PSimagename)
file.write("<<\n" "/ImageType 1\n" "/Width %i\n" % self.imagewidth)
file.write("/Height %i\n" % self.imageheight)
file.write("/BitsPerComponent 8\n"
"/ImageMatrix %s\n" % self.imagematrixPS)
file.write("/Decode %s\n" % self.decode)
file.write("/DataSource ")
if self.PSstoreimage:
if self.PSsinglestring:
file.write("/%s load" % self.PSimagename)
else:
file.write(
"/imagedataaccess load"
) # some printers do not allow for inline code here -> we store it in a resource
else:
if self.PSbinexpand == 2:
file.write("currentfile /ASCIIHexDecode filter")
else:
file.write("currentfile /ASCII85Decode filter")
if self.compressmode:
file.write(" /%sDecode filter" % self.compressmode)
file.write("\n")
file.write(">>\n")
if self.PSstoreimage:
file.write("image\n")
else:
if self.PSbinexpand == 2:
file.write("%%%%BeginData: %i ASCII Lines\n"
"image\n" % (asciihexlines(len(self.data)) + 1))
asciihexstream(file, self.data)
else:
# the datasource is currentstream (plus some filters)
file.write("%%%%BeginData: %i ASCII Lines\n"
"image\n" % (ascii85lines(len(self.data)) + 1))
ascii85stream(file, self.data)
file.write("~>\n")
file.write("%%EndData\n")
file.write("grestore\n")
def processPS(self, file, writer, context, registry, bbox):
mode, data, alpha, palettemode, palettedata = self.imagedata(True)
pstrafo = trafo.translate_pt(0, -1.0).scaled(
self.imagewidth, -self.imageheight) * self.pdftrafo.inverse()
PSsinglestring = self.PSstoreimage and len(data) < self.PSmaxstrlen
if PSsinglestring:
PSimagename = "image-%d-%s-singlestring" % (id(
self.image), self.compressmode)
else:
PSimagename = "image-%d-%s-stringarray" % (id(
self.image), self.compressmode)
if self.PSstoreimage and not PSsinglestring:
registry.add(
pswriter.PSdefinition(
"imagedataaccess",
"{ /imagedataindex load " # get list index
"dup 1 add /imagedataindex exch store " # store increased index
"/imagedataid load exch get }")
) # select string from array
if self.PSstoreimage:
registry.add(
PSimagedata(PSimagename, data, PSsinglestring,
self.PSmaxstrlen))
bbox += self.bbox()
file.write("gsave\n")
if palettedata is not None:
file.write("[ /Indexed %s %i\n" %
(devicenames[palettemode], len(palettedata) / 3 - 1))
file.write("%%%%BeginData: %i ASCII Lines\n" %
ascii85lines(len(palettedata)))
file.write("<~")
ascii85stream(file, palettedata)
file.write("~>\n" "%%EndData\n")
file.write("] setcolorspace\n")
else:
file.write("%s setcolorspace\n" % devicenames[mode])
if self.PSstoreimage and not PSsinglestring:
file.write(
"/imagedataindex 0 store\n" # not use the stack since interpreters differ in their stack usage
"/imagedataid %s store\n" % PSimagename)
file.write("<<\n")
if alpha:
file.write("/ImageType 3\n" "/DataDict\n" "<<\n")
file.write("/ImageType 1\n" "/Width %i\n" % self.imagewidth)
file.write("/Height %i\n" % self.imageheight)
file.write("/BitsPerComponent 8\n" "/ImageMatrix %s\n" % pstrafo)
file.write("/Decode %s\n" % decodestrings[mode])
file.write("/DataSource ")
if self.PSstoreimage:
if PSsinglestring:
file.write("/%s load" % PSimagename)
else:
file.write(
"/imagedataaccess load"
) # some printers do not allow for inline code here -> we store it in a resource
else:
if self.PSbinexpand == 2:
file.write("currentfile /ASCIIHexDecode filter")
else:
file.write("currentfile /ASCII85Decode filter")
if self.compressmode or self.imagecompressed:
file.write(" /%sDecode filter" %
(self.compressmode or self.imagecompressed))
file.write("\n")
file.write(">>\n")
if alpha:
file.write("/MaskDict\n"
"<<\n"
"/ImageType 1\n"
"/Width %i\n" % self.imagewidth)
file.write("/Height %i\n" % self.imageheight)
file.write("/BitsPerComponent 8\n" "/ImageMatrix %s\n" % pstrafo)
file.write("/Decode [1 0]\n" ">>\n" "/InterleaveType 1\n" ">>\n")
if self.PSstoreimage:
file.write("image\n")
else:
if self.PSbinexpand == 2:
file.write("%%%%BeginData: %i ASCII Lines\n"
"image\n" % (asciihexlines(len(data)) + 1))
asciihexstream(file, data)
file.write(">\n")
else:
# the datasource is currentstream (plus some filters)
file.write("%%%%BeginData: %i ASCII Lines\n"
"image\n" % (ascii85lines(len(data)) + 1))
ascii85stream(file, data)
file.write("~>\n")
file.write("%%EndData\n")
file.write("grestore\n")