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sendto_silhouette.py
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#!/usr/bin/env python3
#
# Inkscape extension for driving a silhouette cameo
# (C) 2013 [email protected]. Licensed under CC-BY-SA-3.0 or GPL-2.0 at your choice.
# (C) 2014 - 2022 [email protected] and contributors
__version__ = "1.27" # Keep in sync with sendto_silhouette.inx ca line 79
__author__ = "Juergen Weigert <[email protected]> and contributors"
import sys, os, time, math, operator, re
# we sys.path.append() the directory where this script lives.
sys.path.append(os.path.dirname(os.path.abspath(sys.argv[0])))
sys_platform = sys.platform.lower()
if sys_platform.startswith("win"):
sys.path.append(r"C:\Program Files\Inkscape\share\inkscape\extensions")
elif sys_platform.startswith("darwin"):
sys.path.append("/Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions")
else: # linux
sys.path.append("/usr/share/inkscape/extensions")
# We will use the inkex module with the predefined Effect base class.
# As of Inkscape 1.1, inkex cannot be loaded if stdout is closed,
# which it might be if we are coming here via silhouette_multi.
# This manipulation of sys.stdout should be removed if the issue
# https://gitlab.com/inkscape/extensions/-/issues/412
# is resolved in a future version.
dummy_stdout=False
if not sys.stdout:
sys.stdout=os.fdopen(os.open(os.devnull, os.O_WRONLY|os.O_APPEND), 'w')
dummy_stdout=True
if dummy_stdout:
sys.stdout.close()
sys.stdout=None
import inkex
from inkex.extensions import EffectExtension
from inkex import addNS, Boolean
from inkex.paths import Path, CubicSuperPath
from inkex.transforms import Transform
from inkex.bezier import beziersplitatt, maxdist
from lxml.etree import Element
from gettext import gettext
from optparse import SUPPRESS_HELP
from tempfile import NamedTemporaryFile
inkex.localization.localize()
from silhouette.Graphtec import SilhouetteCameo, CAMEO_MATS
from silhouette.Strategy import MatFree
from silhouette.convert2dashes import splitPath
import silhouette.StrategyMinTraveling
import silhouette.read_dump
from silhouette.Geometry import dist_sq, XY_a
N_PAGE_WIDTH = 3200.0
N_PAGE_HEIGHT = 800.0
IDENTITY_TRANSFORM = [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]
def px2mm(px):
"""
Convert inkscape pixels to mm.
The default inkscape unit, called 'px' is 96dpi
"""
return px*25.4/96
# Lifted with impunity from eggbot.py
# Added all known inkscape units. https://github.com/fablabnbg/inkscape-silhouette/issues/19
def parseLengthWithUnits(str):
"""
Parse an SVG value which may or may not have units attached
This version is greatly simplified in that it only allows: no units,
units of px, mm, and %. Everything else, it returns None for.
There is a more general routine to consider in scour.py if more
generality is ever needed.
"""
u = "px"
s = str.strip()
if s[-2:] == "px":
s = s[:-2]
elif s[-2:] == "mm":
u = "mm"
s = s[:-2]
elif s[-2:] == "pt":
u = "pt"
s = s[:-2]
elif s[-2:] == "pc":
u = "pc"
s = s[:-2]
elif s[-2:] == "cm":
u = "cm"
s = s[:-2]
elif s[-2:] == "in":
u = "in"
s = s[:-2]
elif s[-1:] == "%":
u = "%"
s = s[:-1]
try:
v = float(s)
except:
return None, None
return v, u
def subdivideCubicPath(sp, flat, i=1):
"""
Break up a bezier curve into smaller curves, each of which
is approximately a straight line within a given tolerance
(the "smoothness" defined by [flat]).
This is a modified version of cspsubdiv.cspsubdiv() rewritten
to avoid recurrence.
"""
while True:
while True:
if i >= len(sp):
return
p0 = sp[i - 1][1]
p1 = sp[i - 1][2]
p2 = sp[i][0]
p3 = sp[i][1]
b = (p0, p1, p2, p3)
if maxdist(b) > flat:
break
i += 1
one, two = beziersplitatt(b, 0.5)
sp[i - 1][2] = one[1]
sp[i][0] = two[2]
p = [one[2], one[3], two[1]]
sp[i:1] = [p]
class teeFile:
def __init__(self, f1, f2):
self.f1 = f1
self.f2 = f2
def __del__(self, *args):
self.close()
def write(self, content):
self.f1.write(content)
self.f2.write(content)
def close(self):
self.f1.close()
self.f2.close()
class SendtoSilhouette(EffectExtension):
"""
Inkscape Extension to send to a Silhouette Cameo
"""
def __init__(self):
# Call the base class constructor.
EffectExtension.__init__(self)
self.cut = []
self.warnings = {}
self.handle = 255
self.pathcount = 0
self.resumeMode = False
self.bStopped = False
self.plotCurrentLayer = True
self.allLayers = True # True: all except hidden layers. False: only selected layers.
self.step_scaling_factor = 1 # see also px2mm()
self.ptFirst = None
self.fPrevX = None
self.fPrevY = None
self.fX = None
self.fY = None
self.svgLastPath = 0
self.nodeCount = 0
self.paths = []
self.transforms = {}
# For handling an SVG viewbox attribute, we will need to know the
# values of the document's <svg> width and height attributes as well
# as establishing a transform from the viewbox to the display.
self.docWidth = N_PAGE_WIDTH
self.docHeight = N_PAGE_HEIGHT
self.docTransform = IDENTITY_TRANSFORM
try:
self.tty = open("/dev/tty", "w")
except:
self.tty = None
self.log = self.tty
self.arg_parser.add_argument("--active-tab", dest = "active_tab",
help=SUPPRESS_HELP)
self.arg_parser.add_argument("-d", "--dashes",
dest = "dashes", type = Boolean, default = False,
help="convert paths with dashed strokes to separate subpaths for perforated cuts")
self.arg_parser.add_argument("-a", "--autocrop",
dest = "autocrop", type = Boolean, default = False,
help="trim away top and left margin (before adding offsets)")
self.arg_parser.add_argument("-b", "--bbox", "--bbox-only", "--bbox_only",
dest = "bboxonly", type = Boolean, default = False,
help="draft the objects bounding box instead of the objects")
self.arg_parser.add_argument("-c", "--bladediameter",
dest = "bladediameter", type = float, default = 0.9,
help="[0..2.3] diameter of the used blade [mm], default = 0.9")
self.arg_parser.add_argument("-C", "--cuttingmat",
choices=list(CAMEO_MATS.keys()), dest = "cuttingmat",
default = "cameo_12x12", help="Use cutting mat")
self.arg_parser.add_argument("-D", "--depth",
dest = "depth", type = int, default = -1,
help="[0..10], or -1 for media default")
self.arg_parser.add_argument("--log_paths",
dest = "dump_paths", type = Boolean, default = False,
help="Include final cut paths in log")
self.arg_parser.add_argument("--append_logs",
dest = "append_logs", type = Boolean, default = False,
help="Append to log and dump files rather than overwriting")
self.arg_parser.add_argument("--dry_run",
dest = "dry_run", type = Boolean, default = False,
help="Do not send commands to device (queries allowed)")
self.arg_parser.add_argument("-g", "--strategy",
dest = "strategy", default = "mintravel",
choices=("mintravel", "mintravelfull", "mintravelfwd", "matfree", "zorder"),
help="Cutting Strategy: mintravel, mintravelfull, mintravelfwd, matfree or zorder")
self.arg_parser.add_argument("--orient_paths",
dest = "orient_paths", default = "natural",
choices=("natural","desy","ascy","desx","ascx"),
help="Pre-orient paths: natural (as in svg), or [des(cending)|asc(ending)][y|x]")
self.arg_parser.add_argument("--fuse_paths",
dest = "fuse_paths", type = Boolean, default = True,
help="Merge any path with predecessor that ends at its start.")
self.arg_parser.add_argument("-l", "--sw_clipping",
dest = "sw_clipping", type = Boolean, default = True,
help="Enable software clipping")
self.arg_parser.add_argument("-m", "--media", "--media-id", "--media_id",
dest = "media", default = "132",
choices=("100", "101", "102", "106", "111", "112", "113",
"120", "121", "122", "123", "124", "125", "126", "127", "128", "129", "130",
"131", "132", "133", "134", "135", "136", "137", "138", "300"),
help="113 = pen, 132 = printer paper, 300 = custom")
self.arg_parser.add_argument("-o", "--overcut",
dest = "overcut", type = float, default = 0.5,
help="overcut on circular paths. [mm]")
self.arg_parser.add_argument("-M", "--multipass",
dest = "multipass", type = int, default = "1",
help="[1..8], cut/draw each path object multiple times.")
self.arg_parser.add_argument("-p", "--pressure",
dest = "pressure", type = int, default = 10,
help="[1..18], or 0 for media default")
self.arg_parser.add_argument("-P", "--sharpencorners",
dest = "sharpencorners", type = Boolean, default = False,
help="Lift head at sharp corners")
self.arg_parser.add_argument("--sharpencorners_start",
dest = "sharpencorners_start", type = float, default = 0.1,
help="Sharpen Corners - Start Ext. [mm]")
self.arg_parser.add_argument("--sharpencorners_end",
dest = "sharpencorners_end", type = float, default = 0.1,
help="Sharpen Corners - End Ext. [mm]")
self.arg_parser.add_argument("-r", "--reversetoggle",
dest = "reversetoggle", type = Boolean, default = False,
help="Cut each path the other direction. Affects every second pass when multipass.")
self.arg_parser.add_argument("-s", "--speed",
dest = "speed", type = int, default = 10,
help="[1..10], or 0 for media default")
self.arg_parser.add_argument("-S", "--smoothness", type = float,
dest="smoothness", default=.2, help="Smoothness of curves")
self.arg_parser.add_argument("-t", "--tool",
choices=("autoblade", "cut", "pen", "default"), dest = "tool", default = None, help="Optimize for pen or knive")
self.arg_parser.add_argument("-T", "--toolholder",
choices=("1", "2"), dest = "toolholder", default = None, help="[1..2]")
self.arg_parser.add_argument("--preview",
dest = "preview", type = Boolean, default = True,
help="show cut pattern graphically before sending")
self.arg_parser.add_argument("-V", "--version",
dest = "version", action = "store_true",
help="Just print version number ('"+self.version()+"') and exit.")
self.arg_parser.add_argument("-w", "--wait", "--wait-done", "--wait_done",
dest = "wait_done", type = Boolean, default = False,
help="After sending wait til device reports ready")
self.arg_parser.add_argument("-x", "--x-off", "--x_off",
type = float, dest = "x_off", default = 0.0, help="X-Offset [mm]")
self.arg_parser.add_argument("-y", "--y-off", "--y_off",
type = float, dest = "y_off", default = 0.0, help="Y-Offset [mm]")
self.arg_parser.add_argument("-R", "--regmark",
dest = "regmark", type = Boolean, default = False,
help="The document has registration marks.")
self.arg_parser.add_argument("--regsearch",
dest = "regsearch", type = Boolean, default = False,
help="Search for the registration marks.")
self.arg_parser.add_argument("-X", "--reg-x", "--regwidth",
type = float, dest = "regwidth", default = 180.0, help="X mark distance [mm]")
self.arg_parser.add_argument("-Y", "--reg-y", "--reglength",
type = float, dest = "reglength", default = 230.0, help="Y mark distance [mm]")
self.arg_parser.add_argument("--rego-x", "--regoriginx",
type = float, dest = "regoriginx", default = 15.0, help="X mark origin from left [mm]")
self.arg_parser.add_argument("--rego-y", "--regoriginy",
type = float, dest = "regoriginy", default = 20.0, help="X mark origin from top [mm]")
self.arg_parser.add_argument("-e", "--endposition", "--end-postition",
"--end_position", choices=("start", "below"),
dest = "endposition", default = "below", help="Position of head after cutting: start or below")
self.arg_parser.add_argument("--end_offset", type = float,
dest = "end_offset", default = 0.0,
help="Adjustment to the position after cutting")
self.arg_parser.add_argument("--logfile",
dest = "logfile", default = None,
help="Name of file in which to save log messages.")
self.arg_parser.add_argument("--cmdfile",
dest = "cmdfile", default = None,
help="Name of file to save transcript of cutter commands.")
self.arg_parser.add_argument("--inc_queries",
dest = "inc_queries", type = Boolean, default = False,
help="Include queries in cutter command transcript")
self.arg_parser.add_argument("--force_hardware",
dest = "force_hardware", default = None,
help = "Override hardware model of cutting device.")
# Can't set up the log here because arguments have not yet been parsed;
# defer that to the top of the effect() method, which is where all
# of the real activity happens.
def __del__(self, *args):
if self.log:
self.log.close() # will always close tty if there is one
def version(self):
return __version__
def author(self):
return __author__
def report(self, message, level):
"""
Display `message` to the appropriate output stream(s).
Each of the following `level` values encompasses all of the later ones:
error - display to standard error
log - record in logfile if there is one
tty - write to tty and flush if there is one
"""
if level == 'tty':
if self.tty:
print(message, file=self.tty)
self.tty.flush()
return
if level == 'log' or level == 'error':
if self.log:
print(message, file=self.log)
# That handles the tty also, because of the tee, but
# we have to flush the tty:
if self.tty:
self.tty.flush()
if level == 'log':
return
print(message, file=sys.stderr)
if level != 'error':
# oops accidentally used an invalid level
print(f" ... WARNING: message issued at invalid level {level}",
file=sys.stderr)
def penUp(self):
self.fPrevX = None # flag that we are up
self.fPrevY = None
def penDown(self):
self.paths.append([(self.fX, self.fY)])
self.fPrevX = self.fX # flag that we are down
self.fPrevY = self.fY
def plotLineAndTime(self):
"""
Send commands out the com port as a line segment (dx, dy) and a time (ms) the segment
should take to implement
"""
if self.bStopped:
return
if (self.fPrevX is None):
return
# assuming that penDown() was called before.
self.paths[-1].append((self.fX, self.fY))
def plotPath(self, path, matTransform):
# lifted from eggbot.py, gratefully bowing to the author
"""
Plot the path while applying the transformation defined
by the matrix [matTransform].
"""
# turn this path into a cubicsuperpath (list of beziers)...
d = path.get("d")
p = CubicSuperPath(d).transform(Transform(matTransform))
# ...and apply the transformation to each point
# p is now a list of lists of cubic beziers [control pt1, control pt2, endpoint]
# where the start-point is the last point in the previous segment.
for sp in p:
subdivideCubicPath(sp, self.options.smoothness)
nIndex = 0
for csp in sp:
if self.bStopped:
return
if self.plotCurrentLayer:
if nIndex == 0:
self.penUp()
self.virtualPenIsUp = True
elif nIndex == 1:
self.penDown()
self.virtualPenIsUp = False
nIndex += 1
self.fX = float(csp[1][0]) / self.step_scaling_factor
self.fY = float(csp[1][1]) / self.step_scaling_factor
# store home
if self.ptFirst is None:
self.ptFirst = (self.fX, self.fY)
if self.plotCurrentLayer:
self.plotLineAndTime()
self.fPrevX = self.fX
self.fPrevY = self.fY
def DoWePlotLayer(self, strLayerName):
"""
We are only plotting *some* layers. Check to see
whether or not we're going to plot this one.
First: scan first 4 chars of node id for first non-numeric character,
and scan the part before that (if any) into a number
Then, see if the number matches the layer.
"""
TempNumString = "x"
stringPos = 1
CurrentLayerName = strLayerName.lstrip() # remove leading whitespace
# Look at layer name. Sample first character, then first two, and
# so on, until the string ends or the string no longer consists of
# digit characters only.
MaxLength = len(CurrentLayerName)
if MaxLength > 0:
while stringPos <= MaxLength:
if str.isdigit(CurrentLayerName[:stringPos]):
TempNumString = CurrentLayerName[:stringPos] # Store longest numeric string so far
stringPos = stringPos + 1
else:
break
self.plotCurrentLayer = False # Temporarily assume that we aren't plotting the layer
if (str.isdigit(TempNumString)):
if (self.svgLayer == int(float(TempNumString))):
self.plotCurrentLayer = True # We get to plot the layer!
self.LayersPlotted += 1
# Note: this function is only called if we are NOT plotting all layers.
def recursivelyTraverseSvg(self, aNodeList,
parent_visibility="visible",
extra_transform=IDENTITY_TRANSFORM):
"""
Recursively traverse the svg file to plot out all of the
paths. The function keeps track of the composite transformation
that should be applied to each path.
This function handles path, group, line, rect, polyline, polygon,
circle, ellipse and use (clone) elements. Notable elements not
handled include text. Unhandled elements should be converted to
paths in Inkscape.
"""
if not self.plotCurrentLayer:
return # saves us a lot of time ...
for node in aNodeList:
# Ignore invisible nodes
v = None
style = node.get("style")
if style is not None:
kvs = {k.strip(): v.strip() for k, v in [x.split(":", 1) for x in style.split(";")]}
if "display" in kvs and kvs["display"] == "none":
v = "hidden"
if v is None:
v = node.get("visibility", parent_visibility)
if v == "inherit":
v = parent_visibility
if v == "hidden" or v == "collapse":
continue
# calculate this object's transform
try: # inkscape 1.2
transform = self.compose_parent_transforms(node, IDENTITY_TRANSFORM)
transform = Transform(self.docTransform) @ transform
transform = Transform(extra_transform) @ transform
except: # inkscape 1.0
transform = self.compose_parent_transforms(node, IDENTITY_TRANSFORM)
transform = Transform(self.docTransform) * transform
transform = Transform(extra_transform) * transform
if node.tag == addNS("g", "svg") or node.tag == "g":
self.penUp()
if (node.get(addNS("groupmode", "inkscape")) == "layer"):
if (node.get("style", "") == "display:none"):
self.plotCurrentLayer = False
else:
self.plotCurrentLayer = True
if not self.allLayers:
# inkex.errormsg("Plotting layer named: " + node.get(addNS("label", "inkscape")))
self.DoWePlotLayer(node.get(addNS("label", "inkscape")))
self.recursivelyTraverseSvg(node, parent_visibility=v)
elif node.tag == addNS("use", "svg") or node.tag == "use":
# A <use> element refers to another SVG element via an xlink:href="#blah"
# attribute. We will handle the element by doing an XPath search through
# the document, looking for the element with the matching id="blah"
# attribute. We then recursively process that element after applying
# any necessary (x, y) translation.
#
# Notes:
# 1. We ignore the height and width attributes as they do not apply to
# path-like elements, and
# 2. Even if the use element has visibility="hidden", SVG still calls
# for processing the referenced element. The referenced element is
# hidden only if its visibility is "inherit" or "hidden".
refid = node.get(addNS("href", "xlink"))
if refid:
# [1:] to ignore leading "#" in reference
path = "//*[@id='%s']" % refid[1:]
refnode = node.xpath(path)
if refnode:
x = float(node.get("x", "0"))
y = float(node.get("y", "0"))
# Note: the transform has already been applied
try: # inkscape 1.2
refnode_transform = transform @ Transform("translate(%f, %f)" % (x, y))
# The docTransform will get applied again inside the recursive call
refnode_transform @= -Transform(self.docTransform)
except:
# inkscape 1.0
refnode_transform = transform * Transform("translate(%f, %f)" % (x, y))
# The docTransform will get applied again inside the recursive call
refnode_transform *= -Transform(self.docTransform)
v = node.get("visibility", v)
self.recursivelyTraverseSvg(refnode, parent_visibility=v, extra_transform=refnode_transform)
else:
pass
else:
pass
elif node.tag == addNS("path", "svg"):
if self.options.dashes:
splitPath(inkex, node)
self.pathcount += 1
# if we're in resume mode AND self.pathcount < self.svgLastPath,
# then skip over this path.
# if we're in resume mode and self.pathcount = self.svgLastPath,
# then start here, and set
# self.nodeCount equal to self.svgLastPathNC
if self.resumeMode and (self.pathcount == self.svgLastPath):
self.nodeCount = self.svgLastPathNC
if self.resumeMode and (self.pathcount < self.svgLastPath):
pass
else:
self.plotPath(node, transform)
if (not self.bStopped): # an "index" for resuming plots quickly-- record last complete path
self.svgLastPath += 1
self.svgLastPathNC = self.nodeCount
elif node.tag == addNS("rect", "svg") or node.tag == "rect":
# Manually transform
#
# <rect x="X" y="Y" width="W" height="H"/>
#
# into
#
# <path d="MX, Y lW, 0 l0, H l-W, 0 z"/>
#
# I.e., explicitly draw three sides of the rectangle and the
# fourth side implicitly
self.pathcount += 1
# if we're in resume mode AND self.pathcount < self.svgLastPath,
# then skip over this path.
# if we're in resume mode and self.pathcount = self.svgLastPath,
# then start here, and set
# self.nodeCount equal to self.svgLastPathNC
if self.resumeMode and (self.pathcount == self.svgLastPath):
self.nodeCount = self.svgLastPathNC
if self.resumeMode and (self.pathcount < self.svgLastPath):
pass
else:
# Create a path with the outline of the rectangle
newpath = Element(addNS("path", "svg"))
x = float(node.get("x"))
y = float(node.get("y"))
w = float(node.get("width"))
h = float(node.get("height"))
s = node.get("style")
if s:
newpath.set("style", s)
t = node.get("transform")
if t:
newpath.set("transform", t)
a = []
a.append(["M", [x, y]])
a.append(["l", [w, 0]])
a.append(["l", [0, h]])
a.append(["l", [-w, 0]])
a.append(["Z", []])
newpath.set("d", str(Path(a)))
self.plotPath(newpath, transform)
elif node.tag == addNS("line", "svg") or node.tag == "line":
# Convert
#
# <line x1="X1" y1="Y1" x2="X2" y2="Y2/>
#
# to
#
# <path d="MX1, Y1 LX2, Y2"/>
self.pathcount += 1
# if we're in resume mode AND self.pathcount < self.svgLastPath,
# then skip over this path.
# if we're in resume mode and self.pathcount = self.svgLastPath,
# then start here, and set
# self.nodeCount equal to self.svgLastPathNC
if self.resumeMode and (self.pathcount == self.svgLastPath):
self.nodeCount = self.svgLastPathNC
if self.resumeMode and (self.pathcount < self.svgLastPath):
pass
else:
# Create a path to contain the line
newpath = Element(addNS("path", "svg"))
x1 = float(node.get("x1"))
y1 = float(node.get("y1"))
x2 = float(node.get("x2"))
y2 = float(node.get("y2"))
s = node.get("style")
if s:
newpath.set("style", s)
t = node.get("transform")
if t:
newpath.set("transform", t)
a = []
a.append(["M", [x1, y1]])
a.append(["L", [x2, y2]])
newpath.set("d", str(Path(a)))
self.plotPath(newpath, transform)
if (not self.bStopped): # an "index" for resuming plots quickly-- record last complete path
self.svgLastPath += 1
self.svgLastPathNC = self.nodeCount
elif node.tag == addNS("polyline", "svg") or node.tag == "polyline":
# Convert
#
# <polyline points="x1, y1 x2, y2 x3, y3 [...]"/>
#
# to
#
# <path d="Mx1, y1 Lx2, y2 Lx3, y3 [...]"/>
#
# Note: we ignore polylines with no points
pl = node.get("points", "").strip()
if pl == "":
pass
self.pathcount += 1
# if we're in resume mode AND self.pathcount < self.svgLastPath, then skip over this path.
# if we're in resume mode and self.pathcount = self.svgLastPath, then start here, and set
# self.nodeCount equal to self.svgLastPathNC
if self.resumeMode and (self.pathcount == self.svgLastPath):
self.nodeCount = self.svgLastPathNC
if self.resumeMode and (self.pathcount < self.svgLastPath):
pass
else:
pa = pl.split()
if not len(pa):
pass
# Issue 29: pre 2.5.? versions of Python do not have
# "statement-1 if expression-1 else statement-2"
# which came out of PEP 308, Conditional Expressions
# d = "".join(["M " + pa[i] if i == 0 else " L " + pa[i] for i in range(0, len(pa))])
d = "M " + pa[0]
for i in range(1, len(pa)):
d += " L " + pa[i]
newpath = Element(addNS("path", "svg"))
newpath.set("d", d)
s = node.get("style")
if s:
newpath.set("style", s)
t = node.get("transform")
if t:
newpath.set("transform", t)
self.plotPath(newpath, transform)
if (not self.bStopped): # an "index" for resuming plots quickly-- record last complete path
self.svgLastPath += 1
self.svgLastPathNC = self.nodeCount
elif node.tag == addNS("polygon", "svg") or node.tag == "polygon":
# Convert
#
# <polygon points="x1, y1 x2, y2 x3, y3 [...]"/>
#
# to
#
# <path d="Mx1, y1 Lx2, y2 Lx3, y3 [...] Z"/>
#
# Note: we ignore polygons with no points
pl = node.get("points", "").strip()
if pl == "":
pass
self.pathcount += 1
# if we're in resume mode AND self.pathcount < self.svgLastPath, then skip over this path.
# if we're in resume mode and self.pathcount = self.svgLastPath, then start here, and set
# self.nodeCount equal to self.svgLastPathNC
if self.resumeMode and (self.pathcount == self.svgLastPath):
self.nodeCount = self.svgLastPathNC
if self.resumeMode and (self.pathcount < self.svgLastPath):
pass
else:
pa = pl.split()
if not len(pa):
pass
# Issue 29: pre 2.5.? versions of Python do not have
# "statement-1 if expression-1 else statement-2"
# which came out of PEP 308, Conditional Expressions
# d = "".join(["M " + pa[i] if i == 0 else " L " + pa[i] for i in range(0, len(pa))])
d = "M " + pa[0]
for i in range(1, len(pa)):
d += " L " + pa[i]
d += " Z"
newpath = Element(addNS("path", "svg"))
newpath.set("d", d)
s = node.get("style")
if s:
newpath.set("style", s)
t = node.get("transform")
if t:
newpath.set("transform", t)
self.plotPath(newpath, transform)
if (not self.bStopped): # an "index" for resuming plots quickly-- record last complete path
self.svgLastPath += 1
self.svgLastPathNC = self.nodeCount
elif node.tag == addNS("ellipse", "svg") or node.tag == "ellipse" or \
node.tag == addNS("circle", "svg") or node.tag == "circle":
# Convert circles and ellipses to a path with two 180 degree arcs.
# In general (an ellipse), we convert
#
# <ellipse rx="RX" ry="RY" cx="X" cy="Y"/>
#
# to
#
# <path d="MX1, CY A RX, RY 0 1 0 X2, CY A RX, RY 0 1 0 X1, CY"/>
#
# where
#
# X1 = CX - RX
# X2 = CX + RX
#
# Note: ellipses or circles with a radius attribute of value 0 are ignored
if node.tag == addNS("ellipse", "svg") or node.tag == "ellipse":
rx = float(node.get("rx", "0"))
ry = float(node.get("ry", "0"))
else:
rx = float(node.get("r", "0"))
ry = rx
if rx == 0 or ry == 0:
pass
self.pathcount += 1
# if we're in resume mode AND self.pathcount < self.svgLastPath, then skip over this path.
# if we're in resume mode and self.pathcount = self.svgLastPath, then start here, and set
# self.nodeCount equal to self.svgLastPathNC
if self.resumeMode and (self.pathcount == self.svgLastPath):
self.nodeCount = self.svgLastPathNC
if self.resumeMode and (self.pathcount < self.svgLastPath):
pass
else:
cx = float(node.get("cx", "0"))
cy = float(node.get("cy", "0"))
x1 = cx - rx
x2 = cx + rx
d = "M %f, %f " % (x1, cy) + \
"A %f, %f " % (rx, ry) + \
"0 1 0 %f, %f " % (x2, cy) + \
"A %f, %f " % (rx, ry) + \
"0 1 0 %f, %f" % (x1, cy)
newpath = Element(addNS("path", "svg"))
newpath.set("d", d)
s = node.get("style")
if s:
newpath.set("style", s)
t = node.get("transform")
if t:
newpath.set("transform", t)
self.plotPath(newpath, transform)
if (not self.bStopped): # an "index" for resuming plots quickly-- record last complete path
self.svgLastPath += 1
self.svgLastPathNC = self.nodeCount
elif node.tag == addNS("metadata", "svg") or node.tag == "metadata":
pass
elif node.tag == addNS("defs", "svg") or node.tag == "defs":
pass
elif node.tag == addNS("namedview", "sodipodi") or node.tag == "namedview":
pass
elif node.tag == addNS("title", "svg") or node.tag == "title":
pass
elif node.tag == addNS("desc", "svg") or node.tag == "desc":
pass
elif node.tag == addNS("text", "svg") or node.tag == "text":
texts = []
plaintext = ""
if self.plotCurrentLayer:
for tnode in node.iterfind(".//"): # all subtree
if tnode is not None and tnode.text is not None:
texts.append(tnode.text)
if len(texts):
if "text" not in self.warnings:
inkex.errormsg(gettext("Warning: unable to draw text; " +
"please convert it to a path first. Or consider using the " +
"Hershey Text extension which can be installed in the " +
"'Render' category of extensions."))
self.warnings["text"] = 1
plaintext = "', '".join(texts)
self.report(f"Text ignored: '{plaintext}'", 'error')
pass
elif node.tag == addNS("image", "svg") or node.tag == "image":
if "image" not in self.warnings:
inkex.errormsg(gettext("Warning: unable to draw bitmap images; " +
"please convert them to line art first. Consider using the 'Trace bitmap...' " +
"tool of the 'Path' menu. Mac users please note that some X11 settings may " +
"cause cut-and-paste operations to paste in bitmap copies."))
self.warnings["image"] = 1
pass
elif node.tag == addNS("pattern", "svg") or node.tag == "pattern":
pass
elif node.tag == addNS("radialGradient", "svg") or node.tag == "radialGradient":
# Similar to pattern
pass
elif node.tag == addNS("linearGradient", "svg") or node.tag == "linearGradient":
# Similar in pattern
pass
elif node.tag == addNS("style", "svg") or node.tag == "style":
# This is a reference to an external style sheet and not the value
# of a style attribute to be inherited by child elements
pass
elif node.tag == addNS("cursor", "svg") or node.tag == "cursor":
pass
elif node.tag == addNS("flowRoot", "svg") or node.tag == "flowRoot":
# contains a <flowRegion><rect y="91" x="369" height="383" width="375" ...
# see examples/fablab_logo_stencil.svg
pass
elif node.tag == addNS("color-profile", "svg") or node.tag == "color-profile":
# Gamma curves, color temp, etc. are not relevant to single color output
pass
elif not isinstance(node.tag, str):
# This is likely an XML processing instruction such as an XML
# comment. lxml uses a function reference for such node tags
# and as such the node tag is likely not a printable string.
# Further, converting it to a printable string likely won't
# be very useful.
pass
else:
if str(node.tag) not in self.warnings:
t = str(node.tag).split("}")
self.report(gettext(
f"Warning: unable to draw <{str(t[-1])}> object,"
f"please convert it to a path first."),
'error')
self.warnings[str(node.tag)] = 1
pass
def getLength(self, name, default):
"""
Get the <svg> attribute with name "name" and default value "default"
Parse the attribute into a value and associated units. Then, accept
no units (""), units of pixels ("px"), and units of percentage ("%").
"""
s = self.document.getroot().get(name)
if s:
v, u = parseLengthWithUnits(s)
if not v:
# Couldn't parse the value
self.report(f"getLength: unknown unit in '{s}'",
'error')
return None
elif (u == "") or (u == "px"):
return v
elif u == "mm":
return v*96./25.4 # inverse of px2mm
elif u == "in":
return v*96.
elif u == "cm":
return v*96./2.54 # inverse of 10*px2mm
elif u == "pt":
return v*96./72.
elif u == "pc":
return v*96./16.
elif u == "%":
return float(default) * v / 100.0
else:
self.report(f"getLength: Unknown unit: '{u}'", 'error')
return None
else:
# No width specified; assume the default value
return float(default)
def getDocProps(self):
"""
Get the document's height and width attributes from the <svg> tag.
Use a default value in case the property is not present or is
expressed in units of percentages.
"""
self.docHeight = self.getLength("height", N_PAGE_HEIGHT)
self.report(f"7 self.docHeight= {str(self.docHeight)}", 'tty')
self.docWidth = self.getLength("width", N_PAGE_WIDTH)
self.report(f"8 self.docWidth= {str(self.docWidth)}", 'tty')
return all((self.docHeight, self.docWidth))
def handleViewBox(self):
"""
Set up the document-wide transform in the event that the document has an SVG viewbox
"""
if self.getDocProps():
viewbox = self.document.getroot().get("viewBox")
if viewbox:
vinfo = viewbox.strip().replace(",", " ").split(" ")
if all((vinfo[2], vinfo[3])):
sx = self.docWidth / float(vinfo[2])
sy = self.docHeight / float(vinfo[3])
self.docTransform = Transform("scale(%f, %f)" % (sx, sy))
def is_closed_path(self, path):
return dist_sq(XY_a(path[0]), XY_a(path[-1])) < 0.01
def compose_parent_transforms(self, node, mat): # Inkscape >= 1.0
# This is adapted from Inkscape's simpletransform.py's composeParents()
# function. That one can't handle nodes that are detached from a DOM.
trans = node.get("transform")
if trans:
try: # inkscape 1.2
mat = Transform(trans) @ mat
except: # inkscape 1.0
mat = Transform(trans) * mat
if node.getparent() is not None:
if node.getparent().tag == addNS("g", "svg"):
mat = self.compose_parent_transforms(node.getparent(), mat)
return mat