pswriter.py 文件源码

python
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项目:OpenRAM 作者: mguthaus 项目源码 文件源码
def __init__(self, document, file):
        if len(document.pages) != 1:
            raise ValueError("EPS file can be constructed out of a single page document only")
        page = document.pages[0]
        canvas = page.canvas

        try:
            file.write("")
        except:
            filename = file
            if not filename.endswith(".eps"):
                filename += ".eps"
            try:
                file = open(filename, "w")
            except IOError:
                raise IOError("cannot open output file")
        else:
            filename = "stream"

        pagefile = cStringIO.StringIO()
        registry = PSregistry()
        acontext = context()
        pagebbox = bbox.empty()

        page.processPS(pagefile, self, acontext, registry, pagebbox)

        file.write("%!PS-Adobe-3.0 EPSF-3.0\n")
        if pagebbox:
            file.write("%%%%BoundingBox: %d %d %d %d\n" % pagebbox.lowrestuple_pt())
            file.write("%%%%HiResBoundingBox: %g %g %g %g\n" % pagebbox.highrestuple_pt())
        file.write("%%%%Creator: PyX %s\n" % version.version)
        file.write("%%%%Title: %s\n" % filename)
        file.write("%%%%CreationDate: %s\n" %
                   time.asctime(time.localtime(time.time())))
        file.write("%%EndComments\n")

        file.write("%%BeginProlog\n")
        registry.output(file, self)
        file.write("%%EndProlog\n")

        file.write(pagefile.getvalue())
        pagefile.close()

        file.write("showpage\n")
        file.write("%%Trailer\n")
        file.write("%%EOF\n")
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