kopia lustrzana https://github.com/inkstitch/inkstitch
131 wiersze
4.5 KiB
Python
131 wiersze
4.5 KiB
Python
import libembroidery
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import inkex
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import simpletransform
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from .utils import Point
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from .svg import PIXELS_PER_MM, get_doc_size, get_viewbox_transform
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def make_thread(color):
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thread = libembroidery.EmbThread()
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thread.color = libembroidery.embColor_make(*color.rgb)
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thread.description = color.name
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thread.catalogNumber = ""
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return thread
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def add_thread(pattern, thread):
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"""Add a thread to a pattern and return the thread's index"""
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libembroidery.embPattern_addThread(pattern, thread)
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return libembroidery.embThreadList_count(pattern.threadList) - 1
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def get_flags(stitch):
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flags = 0
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if stitch.jump:
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flags |= libembroidery.JUMP
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if stitch.trim:
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flags |= libembroidery.TRIM
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if stitch.stop:
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flags |= libembroidery.STOP
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return flags
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def _string_to_floats(string):
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floats = string.split(',')
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return [float(num) for num in floats]
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def get_origin(svg):
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# The user can specify the embroidery origin by defining two guides
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# named "embroidery origin" that intersect.
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namedview = svg.find(inkex.addNS('namedview', 'sodipodi'))
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all_guides = namedview.findall(inkex.addNS('guide', 'sodipodi'))
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label_attribute = inkex.addNS('label', 'inkscape')
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guides = [guide for guide in all_guides
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if guide.get(label_attribute, "").startswith("embroidery origin")]
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# document size used below
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doc_size = list(get_doc_size(svg))
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# convert the size from viewbox-relative to real-world pixels
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viewbox_transform = get_viewbox_transform(svg)
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simpletransform.applyTransformToPoint(simpletransform.invertTransform(viewbox_transform), doc_size)
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default = [doc_size[0] / 2.0, doc_size[1] / 2.0]
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simpletransform.applyTransformToPoint(viewbox_transform, default)
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default = Point(*default)
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if len(guides) < 2:
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return default
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# Find out where the guides intersect. Only pay attention to the first two.
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guides = guides[:2]
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lines = []
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for guide in guides:
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# inkscape's Y axis is reversed from SVG's, and the guide is in inkscape coordinates
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position = Point(*_string_to_floats(guide.get('position')))
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position.y = doc_size[1] - position.y
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# This one baffles me. I think inkscape might have gotten the order of
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# their vector wrong?
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parts = _string_to_floats(guide.get('orientation'))
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direction = Point(parts[1], parts[0])
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# We have a theoretically infinite line defined by a point on the line
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# and a vector direction. Shapely can only deal in concrete line
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# segments, so we'll pick points really far in either direction on the
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# line and call it good enough.
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lines.append(shgeo.LineString((position + 100000 * direction, position - 100000 * direction)))
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intersection = lines[0].intersection(lines[1])
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if isinstance(intersection, shgeo.Point):
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origin = [intersection.x, intersection.y]
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simpletransform.applyTransformToPoint(viewbox_transform, origin)
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return Point(*origin)
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else:
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# Either the two guides are the same line, or they're parallel.
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return default
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def write_embroidery_file(file_path, stitch_plan, svg):
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origin = get_origin(svg)
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pattern = libembroidery.embPattern_create()
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for color_block in stitch_plan:
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add_thread(pattern, make_thread(color_block.color))
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for stitch in color_block:
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if stitch.stop and stitch is not color_block.last_stitch:
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# A STOP stitch that is not at the end of a color block
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# occurs when the user specified "STOP after". "STOP" is the
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# same thing as a color change, and the user will assign a
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# special color at the machine that tells it to pause after.
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# We need to add another copy of the same color here so that
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# the stitches after the STOP are still the same color.
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add_thread(pattern, make_thread(color_block.color))
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flags = get_flags(stitch)
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libembroidery.embPattern_addStitchAbs(pattern, stitch.x - origin.x, stitch.y - origin.y, flags, 1)
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libembroidery.embPattern_addStitchAbs(pattern, stitch.x - origin.x, stitch.y - origin.y, libembroidery.END, 1)
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# convert from pixels to millimeters
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libembroidery.embPattern_scale(pattern, 1/PIXELS_PER_MM)
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# SVG and embroidery disagree on the direction of the Y axis
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libembroidery.embPattern_flipVertical(pattern)
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libembroidery.embPattern_write(pattern, file_path)
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