62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
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from fontTools.pens.transformPen import TransformPen
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from fontTools.misc import etree
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from fontTools.misc.textTools import tostr
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from .parser import parse_path
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from .shapes import PathBuilder
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__all__ = [tostr(s) for s in ("SVGPath", "parse_path")]
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class SVGPath(object):
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"""Parse SVG ``path`` elements from a file or string, and draw them
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onto a glyph object that supports the FontTools Pen protocol.
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For example, reading from an SVG file and drawing to a Defcon Glyph:
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import defcon
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glyph = defcon.Glyph()
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pen = glyph.getPen()
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svg = SVGPath("path/to/a.svg")
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svg.draw(pen)
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Or reading from a string containing SVG data, using the alternative
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'fromstring' (a class method):
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data = '<?xml version="1.0" ...'
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svg = SVGPath.fromstring(data)
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svg.draw(pen)
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Both constructors can optionally take a 'transform' matrix (6-float
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tuple, or a FontTools Transform object) to modify the draw output.
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"""
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def __init__(self, filename=None, transform=None):
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if filename is None:
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self.root = etree.ElementTree()
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else:
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tree = etree.parse(filename)
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self.root = tree.getroot()
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self.transform = transform
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@classmethod
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def fromstring(cls, data, transform=None):
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self = cls(transform=transform)
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self.root = etree.fromstring(data)
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return self
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def draw(self, pen):
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if self.transform:
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pen = TransformPen(pen, self.transform)
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pb = PathBuilder()
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# xpath | doesn't seem to reliable work so just walk it
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for el in self.root.iter():
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pb.add_path_from_element(el)
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original_pen = pen
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for path, transform in zip(pb.paths, pb.transforms):
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if transform:
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pen = TransformPen(original_pen, transform)
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else:
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pen = original_pen
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parse_path(path, pen)
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