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December 5, 2023 13:41
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Convert a text character to an SVG path.
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from svgpathtools import wsvg, Line, QuadraticBezier, Path | |
from freetype import Face | |
def tuple_to_imag(t): | |
return t[0] + t[1] * 1j | |
face = Face('./Vera.ttf') | |
face.set_char_size(48 * 64) | |
face.load_char('a') | |
outline = face.glyph.outline | |
y = [t[1] for t in outline.points] | |
# flip the points | |
outline_points = [(p[0], max(y) - p[1]) for p in outline.points] | |
start, end = 0, 0 | |
paths = [] | |
for i in range(len(outline.contours)): | |
end = outline.contours[i] | |
points = outline_points[start:end + 1] | |
points.append(points[0]) | |
tags = outline.tags[start:end + 1] | |
tags.append(tags[0]) | |
segments = [[points[0], ], ] | |
for j in range(1, len(points)): | |
segments[-1].append(points[j]) | |
if tags[j] and j < (len(points) - 1): | |
segments.append([points[j], ]) | |
for segment in segments: | |
if len(segment) == 2: | |
paths.append(Line(start=tuple_to_imag(segment[0]), | |
end=tuple_to_imag(segment[1]))) | |
elif len(segment) == 3: | |
paths.append(QuadraticBezier(start=tuple_to_imag(segment[0]), | |
control=tuple_to_imag(segment[1]), | |
end=tuple_to_imag(segment[2]))) | |
elif len(segment) == 4: | |
C = ((segment[1][0] + segment[2][0]) / 2.0, | |
(segment[1][1] + segment[2][1]) / 2.0) | |
paths.append(QuadraticBezier(start=tuple_to_imag(segment[0]), | |
control=tuple_to_imag(segment[1]), | |
end=tuple_to_imag(C))) | |
paths.append(QuadraticBezier(start=tuple_to_imag(C), | |
control=tuple_to_imag(segment[2]), | |
end=tuple_to_imag(segment[3]))) | |
else: | |
print(f"incompatible segment length: {len(segment)}") | |
start = end + 1 | |
path = Path(*paths) | |
wsvg(path, filename="text.svg") |
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... and with ctx:
svg = """
""".format(" ".join(ctx))<svg xmlns="http://www.w3.org/2000/svg"
width="100mm"
height="100mm"
viewBox="0 0 100 100"
version="1.1"
print(svg)