def __init__(self, dist, angle, strokestyles=[]):
     pattern.__init__(self, painttype=1, tilingtype=1, xstep=dist, ystep=dist, bbox=None, trafo=trafo.rotate(angle))
     self.strokestyles = attr.mergeattrs([style.linewidth.THIN] + strokestyles)
     attr.checkattrs(self.strokestyles, [style.strokestyle])
     self.dist = dist
     self.angle = angle
     self.stroke(path.line_pt(0, 0, 0, unit.topt(dist)), self.strokestyles)
     self.stroke(path.line_pt(0, 0, unit.topt(dist), 0), self.strokestyles)

    def __init__(self, angle, x=None, y=None, epsilon=_marker):
        vector = 0, 0 
        if x is not None or y is not None:
            if x is None or y is None:
                raise TrafoException("either specify both x and y or none of them")
            vector=_rvector(angle, unit.topt(x), unit.topt(y))

        trafo_pt.__init__(self, matrix=_rmatrix(angle), vector=vector, epsilon=epsilon)

    def _process(self, processMethod, contentfile, writer, context, registry, bbox):
        # usually, it is the bbox of the canvas enlarged by self.bboxenlarge, but
        # it might be a different bbox as specified in the page constructor
        assert not bbox
        if self.pagebbox:
            bbox.set(self.pagebbox)
        else:
            bbox.set(self.canvas.bbox()) # this bbox is not accurate
            bbox.enlarge(self.bboxenlarge)

        # check whether we expect a page trafo and use a temporary canvas to insert the
        # page canvas
        if self.paperformat and (self.rotated or self.centered or self.fittosize) and bbox:
            # calculate the pagetrafo
            paperwidth, paperheight = self.paperformat.width, self.paperformat.height

            # center (optionally rotated) output on page
            if self.rotated:
                pagetrafo = trafo.rotate(90).translated(paperwidth, 0)
                if self.centered or self.fittosize:
                    if not self.fittosize and (bbox.height() > paperwidth or bbox.width() > paperheight):
                        warnings.warn("content exceeds the papersize")
                    pagetrafo = pagetrafo.translated(-0.5*(paperwidth - bbox.height()) + bbox.bottom(),
                                                      0.5*(paperheight - bbox.width()) - bbox.left())
            else:
                if not self.fittosize and (bbox.width() > paperwidth or bbox.height() > paperheight):
                    warnings.warn("content exceeds the papersize")
                pagetrafo = trafo.translate(0.5*(paperwidth - bbox.width())  - bbox.left(),
                                            0.5*(paperheight - bbox.height()) - bbox.bottom())

            if self.fittosize:

                if 2*self.margin > paperwidth or 2*self.margin > paperheight:
                    raise ValueError("Margins too broad for selected paperformat. Aborting.")

                paperwidth -= 2 * self.margin
                paperheight -= 2 * self.margin

                # scale output to pagesize - margins
                if self.rotated:
                    sfactor = min(unit.topt(paperheight)/bbox.width_pt(), unit.topt(paperwidth)/bbox.height_pt())
                else:
                    sfactor = min(unit.topt(paperwidth)/bbox.width_pt(), unit.topt(paperheight)/bbox.height_pt())

                pagetrafo = pagetrafo.scaled(sfactor, sfactor, self.margin + 0.5*paperwidth, self.margin + 0.5*paperheight)

            bbox.transform(pagetrafo)
            cc = canvasmodule.canvas()
            cc.insert(self.canvas, [pagetrafo])
        else:
            cc = self.canvas

        getattr(style.linewidth.normal, processMethod)(contentfile, writer, context, registry, bbox)
        if self.pagebbox:
            bbox = bbox.copy() # don't alter the bbox provided to the constructor -> use a copy
        getattr(cc, processMethod)(contentfile, writer, context, registry, bbox)

    def __init__(self, xpos, ypos, image, width=None, height=None, **kwargs):
        xpos_pt = unit.topt(xpos)
        ypos_pt = unit.topt(ypos)
        if width is not None:
            width_pt = unit.topt(width)
        else:
            width_pt = None
        if height is not None:
            height_pt = unit.topt(height)
        else:
            height_pt = None

        bitmap_pt.__init__(self, xpos_pt, ypos_pt, image, width_pt=width_pt, height_pt=height_pt, **kwargs)

 def write(self, file, writer, registry):
     file.write("<<\n"
                "/Type /Page\n"
                "/Parent %i 0 R\n" % registry.getrefno(self.PDFpages))
     paperformat = self.page.paperformat
     if paperformat:
         file.write("/MediaBox [0 0 %f %f]\n" % (unit.topt(paperformat.width), unit.topt(paperformat.height)))
     else:
         file.write("/MediaBox [%f %f %f %f]\n" % self.PDFcontent.bbox.highrestuple_pt())
     if self.PDFcontent.bbox and writer.writebbox:
         file.write("/CropBox [%f %f %f %f]\n" % self.PDFcontent.bbox.highrestuple_pt())
     if self.page.rotated:
         file.write("/Rotate 90\n")
     file.write("/Contents %i 0 R\n" % registry.getrefno(self.PDFcontent))
     self.pageregistry.writeresources(file)
     file.write(">>\n")

    def _bracepath(self, x0_pt, y0_pt, x1_pt, y1_pt): # <<<
        height_pt = unit.topt(self.totalheight)
        totallength_pt = math.hypot(x1_pt - x0_pt, y1_pt - y0_pt)
        leftlength_pt = self.middlerelpos * totallength_pt
        rightlength_pt = totallength_pt - leftlength_pt
        ithick_pt = unit.topt(self.innerstrokesthickness)
        othick_pt = unit.topt(self.outerstrokesthickness)
        bthick_pt = unit.topt(self.barthickness)

        # create the left halfbrace with positive slanting
        # because we will mirror this part
        cos_iangle = math.cos(math.radians(0.5*self.innerstrokesangle - self.slantstrokesangle))
        sin_iangle = math.sin(math.radians(0.5*self.innerstrokesangle - self.slantstrokesangle))
        cos_oangle = math.cos(math.radians(self.outerstrokesangle - self.slantstrokesangle))
        sin_oangle = math.sin(math.radians(self.outerstrokesangle - self.slantstrokesangle))
        cos_slangle = math.cos(math.radians(-self.slantstrokesangle))
        sin_slangle = math.sin(math.radians(-self.slantstrokesangle))
        ilength_pt = self.innerstrokesrelheight * height_pt / cos_iangle
        olength_pt = self.outerstrokesrelheight * height_pt / cos_oangle

        bracepath = self._halfbracepath_pt(leftlength_pt, height_pt,
          ilength_pt, olength_pt, ithick_pt, othick_pt, bthick_pt, cos_iangle,
          sin_iangle, cos_oangle, sin_oangle, cos_slangle,
          sin_slangle).reversed().transformed(trafo.mirror(90))

        # create the right halfbrace with negative slanting
        cos_iangle = math.cos(math.radians(0.5*self.innerstrokesangle + self.slantstrokesangle))
        sin_iangle = math.sin(math.radians(0.5*self.innerstrokesangle + self.slantstrokesangle))
        cos_oangle = math.cos(math.radians(self.outerstrokesangle + self.slantstrokesangle))
        sin_oangle = math.sin(math.radians(self.outerstrokesangle + self.slantstrokesangle))
        cos_slangle = math.cos(math.radians(-self.slantstrokesangle))
        sin_slangle = math.sin(math.radians(-self.slantstrokesangle))
        ilength_pt = self.innerstrokesrelheight * height_pt / cos_iangle
        olength_pt = self.outerstrokesrelheight * height_pt / cos_oangle

        bracepath = bracepath << self._halfbracepath_pt(rightlength_pt, height_pt,
        ilength_pt, olength_pt, ithick_pt, othick_pt, bthick_pt, cos_iangle,
        sin_iangle, cos_oangle, sin_oangle, cos_slangle,
        sin_slangle)

        return bracepath.transformed(
          # two trafos for matching the given endpoints
          trafo.translate_pt(x0_pt, y0_pt) *
          trafo.rotate_pt(math.degrees(math.atan2(y1_pt-y0_pt, x1_pt-x0_pt))) *
          # one trafo to move the brace's left outer stroke to zero
          trafo.translate_pt(leftlength_pt, 0))

 def __init__(self, box1, box2, relangle=45,
              absbulge=None, relbulge=None, boxdists=[0,0]):
     if absbulge is not None:
         absbulge = unit.topt(absbulge)
     arc_pt.__init__(self, box1, box2,
                     relangle=relangle,
                     absbulge=absbulge, relbulge=relbulge,
                     boxdists=map(unit.topt, boxdists))

    def enlarged(self, all=0, bottom=None, left=None, top=None, right=None):
        """return bbox enlarged

        all is used, if bottom, left, top and/or right are not given.

        """
        if self.llx_pt is None:
            return empty()
        bottom_pt = left_pt = top_pt = right_pt = unit.topt(all)
        if bottom is not None:
           bottom_pt = unit.topt(bottom)
        if left is not None:
           left_pt = unit.topt(left)
        if top is not None:
           top_pt = unit.topt(top)
        if right is not None:
           right_pt = unit.topt(right)
        return bbox_pt(self.llx_pt-left_pt, self.lly_pt-bottom_pt, self.urx_pt+right_pt, self.ury_pt+top_pt)

    def processPDF(self, file, writer, context, registry, bbox):
        # we need to keep track of the resources used by the pattern, hence
        # we create our own registry, which we merge immediately in the main registry
        patternregistry = pdfwriter.PDFregistry()

        patternfile = cStringIO.StringIO()
        realpatternbbox = bboxmodule.empty()
        canvas._canvas.processPDF(self, patternfile, writer, pdfwriter.context(), patternregistry, realpatternbbox)
        patternproc = patternfile.getvalue()
        patternfile.close()

        registry.mergeregistry(patternregistry)

        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(5*unit.pt)
        patterntrafo = self.patterntrafo or trafo.trafo()

        registry.add(PDFpattern(self.id, self.patterntype, self.painttype, self.tilingtype,
                                patternbbox, xstep, ystep, patterntrafo, patternproc, writer, registry, patternregistry))

        # activate pattern
        if context.colorspace != "Pattern":
            # we only set the fill color space (see next comment)
            file.write("/Pattern cs\n")
            context.colorspace = "Pattern"
        if context.strokeattr:
            # using patterns as stroke colors doesn't seem to work, so
            # we just don't do this...
            warnings.warn("ignoring stroke color for patterns in PDF")
        if context.fillattr:
            file.write("/%s scn\n"% self.id)

    def enlarge(self, all=0, bottom=None, left=None, top=None, right=None):
        """enlarge bbox in place

        all is used, if bottom, left, top and/or right are not given.

        """
        if self.llx_pt is None:
            return
        bottom_pt = left_pt = top_pt = right_pt = unit.topt(all)
        if bottom is not None:
           bottom_pt = unit.topt(bottom)
        if left is not None:
           left_pt = unit.topt(left)
        if top is not None:
           top_pt = unit.topt(top)
        if right is not None:
           right_pt = unit.topt(right)
        self.llx_pt -= left_pt
        self.lly_pt -= bottom_pt
        self.urx_pt += right_pt
        self.ury_pt += top_pt

 def path(self, centerradius=None, bezierradius=None, beziersoftness=None):
     pathitems = []
     if centerradius is not None and self.center is not None:
         r = unit.topt(centerradius)
         pathitems.append(path.arc_pt(self.center[0], self.center[1], r, 0, 360))
         pathitems.append(path.closepath())
     if bezierradius is not None or beziersoftness is not None:
         raise ValueError("smooth functionality removed; apply smooth deformer on path")
     pathitems.append(path.moveto_pt(self.corners[0][0], self.corners[0][1]))
     for x, y in self.corners[1:]:
         pathitems.append(path.lineto_pt(x, y))
     pathitems.append(path.closepath())
     return path.path(*pathitems)

    def _decocanvas(self, angle, dp, texrunner):
        dp.ensurenormpath()
        dist_pt = unit.topt(self.dist)

        c = canvas.canvas([canvas.clip(dp.path)])
        llx_pt, lly_pt, urx_pt, ury_pt = dp.path.bbox().highrestuple_pt()
        center_pt = 0.5*(llx_pt+urx_pt), 0.5*(lly_pt+ury_pt)
        radius_pt = 0.5*math.hypot(urx_pt-llx_pt, ury_pt-lly_pt) + dist_pt
        n = int(2*radius_pt / dist_pt) + 1
        for i in range(n):
            x_pt = center_pt[0] - radius_pt + i*dist_pt
            c.stroke(path.line_pt(x_pt, center_pt[1]-radius_pt, x_pt, center_pt[1]+radius_pt),
                     [trafo.rotate_pt(angle, center_pt[0], center_pt[1])] + self.strokestyles)
        return c

    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(5*unit.pt)

        patternprefix = "\n".join(("<<",
                                   "/PatternType %d" % self.patterntype,
                                   "/PaintType %d" % self.painttype,
                                   "/TilingType %d" % self.tilingtype,
                                   "/BBox[%d %d %d %d]" % patternbbox.lowrestuple_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)

 def decorate(self, dp, texrunner):
     dp.ensurenormpath()
     x0_pt, y0_pt = dp.path.atbegin_pt()
     x1_pt, y1_pt = dp.path.atend_pt()
     if self.reverse:
         x0_pt, y0_pt, x1_pt, y1_pt = x1_pt, y1_pt, x0_pt, y0_pt
     if self.stretch is not None:
         xm, ym = 0.5*(x0_pt+x1_pt), 0.5*(y0_pt+y1_pt)
         x0_pt, y0_pt = xm + self.stretch*(x0_pt-xm), ym + self.stretch*(y0_pt-ym)
         x1_pt, y1_pt = xm + self.stretch*(x1_pt-xm), ym + self.stretch*(y1_pt-ym)
     if self.dist is not None:
         d = unit.topt(self.dist)
         dx, dy = dp.path.rotation_pt(dp.path.begin()).apply_pt(0, 1)
         x0_pt += d*dx; y0_pt += d*dy
         dx, dy = dp.path.rotation_pt(dp.path.end()).apply_pt(0, 1)
         x1_pt += d*dx; y1_pt += d*dy
     dp.ornaments.fill(self._bracepath(x0_pt, y0_pt, x1_pt, y1_pt), self.fillattrs)

 def __init__(self, x1, y1, x2, y2, x3, y3):
     curveto_pt.__init__(self,
                         unit.topt(x1), unit.topt(y1),
                         unit.topt(x2), unit.topt(y2),
                         unit.topt(x3), unit.topt(y3))

 def __init__(self, coords, value):
     node_pt.__init__(self, [unit.topt(coord) for coord in coords], value)

    def __init__(self,
                 x, y, filename,
                 width=None, height=None, scale=None, align="bl",
                 clip=1, translatebbox=1, bbox=None,
                 kpsearch=0):
        """inserts epsfile

        Object for an EPS file named filename at position (x,y). Width, height,
        scale and aligment can be adjusted by the corresponding parameters. If
        clip is set, the result gets clipped to the bbox of the EPS file. If
        translatebbox is not set, the EPS graphics is not translated to the
        corresponding origin. If bbox is not None, it overrides the bounding
        box in the epsfile itself. If kpsearch is set then filename is searched
        using the kpathsea library.
        """

        self.x_pt = unit.topt(x)
        self.y_pt = unit.topt(y)
        self.filename = filename
        self.kpsearch = kpsearch
        if bbox:
            self.mybbox = bbox
        else:
            epsfile = self.open()
            self.mybbox = _readbbox(epsfile)
            epsfile.close()

        # determine scaling in x and y direction
        self.scalex = self.scaley = scale

        if width is not None or height is not None:
            if scale is not None:
                raise ValueError("cannot set both width and/or height and scale simultaneously")
            if height is not None:
                self.scaley = unit.topt(height)/(self.mybbox.ury_pt-self.mybbox.lly_pt)
            if width is not None:
                self.scalex = unit.topt(width)/(self.mybbox.urx_pt-self.mybbox.llx_pt)

            if self.scalex is None:
                self.scalex = self.scaley
            if self.scaley is None:
                self.scaley = self.scalex

        # set the actual width and height of the eps file (after a
        # possible scaling)
        self.width_pt  = self.mybbox.urx_pt-self.mybbox.llx_pt
        if self.scalex:
            self.width_pt *= self.scalex

        self.height_pt = self.mybbox.ury_pt-self.mybbox.lly_pt
        if self.scaley:
            self.height_pt *= self.scaley

        # take alignment into account
        self.align       = align
        if self.align[0]=="b":
            pass
        elif self.align[0]=="c":
            self.y_pt -= self.height_pt/2.0
        elif self.align[0]=="t":
            self.y_pt -= self.height_pt
        else:
            raise ValueError("vertical alignment can only be b (bottom), c (center), or t (top)")

        if self.align[1]=="l":
            pass
        elif self.align[1]=="c":
            self.x_pt -= self.width_pt/2.0
        elif self.align[1]=="r":
            self.x_pt -= self.width_pt
        else:
            raise ValueError("horizontal alignment can only be l (left), c (center), or r (right)")

        self.clip = clip
        self.translatebbox = translatebbox

        self.trafo = trafo.translate_pt(self.x_pt, self.y_pt)

        if self.scalex is not None:
            self.trafo = self.trafo * trafo.scale_pt(self.scalex, self.scaley)

        if translatebbox:
            self.trafo = self.trafo * trafo.translate_pt(-self.mybbox.llx_pt, -self.mybbox.lly_pt)

 def apply(self, x, y):
     # for the transformation we have to convert to points
     tx, ty = self.apply_pt(unit.topt(x), unit.topt(y))
     return tx * unit.t_pt, ty * unit.t_pt