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improve handling of patterns with no bounding box

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This commit is contained in:
Jan Petykiewicz 2020-05-11 18:42:31 -07:00
parent 334633662e
commit 9fa527ea11
1 changed files with 13 additions and 2 deletions
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15
masque/file/svg.py
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@ -4,6 +4,7 @@ SVG file format readers and writers
import svgwrite import svgwrite
import numpy import numpy
import warnings
from .utils import mangle_name from .utils import mangle_name
from .. import Pattern from .. import Pattern
@ -40,7 +41,12 @@ def writefile(pattern: Pattern,
# Polygonize pattern # Polygonize pattern
pattern.polygonize() pattern.polygonize()
[bounds_min, bounds_max] = pattern.get_bounds() bounds = pattern.get_bounds()
if bounds is None:
bounds_min, bounds_max = numpy.array([[-1, -1], [1, 1]])
warnings.warn('Pattern had no bounds (empty?); setting arbitrary viewbox')
else:
bounds_min, bounds_max = bounds
viewbox = numpy.hstack((bounds_min - 1, (bounds_max - bounds_min) + 2)) viewbox = numpy.hstack((bounds_min - 1, (bounds_max - bounds_min) + 2))
viewbox_string = '{:g} {:g} {:g} {:g}'.format(*viewbox) viewbox_string = '{:g} {:g} {:g} {:g}'.format(*viewbox)
@ -100,7 +106,12 @@ def writefile_inverted(pattern: Pattern, filename: str):
# Polygonize and flatten pattern # Polygonize and flatten pattern
pattern.polygonize().flatten() pattern.polygonize().flatten()
[bounds_min, bounds_max] = pattern.get_bounds() bounds = pattern.get_bounds()
if bounds is None:
bounds_min, bounds_max = numpy.array([[-1, -1], [1, 1]])
warnings.warn('Pattern had no bounds (empty?); setting arbitrary viewbox')
else:
bounds_min, bounds_max = bounds
viewbox = numpy.hstack((bounds_min - 1, (bounds_max - bounds_min) + 2)) viewbox = numpy.hstack((bounds_min - 1, (bounds_max - bounds_min) + 2))
viewbox_string = '{:g} {:g} {:g} {:g}'.format(*viewbox) viewbox_string = '{:g} {:g} {:g} {:g}'.format(*viewbox)