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Also collapse multiple straight lineto (m,l) segments that run in the same direction, just as we do for h,v

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This commit is contained in:
Eduard Braun 2017-05-16 21:55:44 +02:00
parent 05c2dde477
commit 3c3f60f4c0
1 changed files with 15 additions and 3 deletions
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18
scour/scour.py
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@ -403,7 +403,8 @@ default_properties = { # excluded all properties with 'auto' as default
}
def isSameSign(a, b): return (a <= 0 and b <= 0) or (a >= 0 and b >= 0)
def is_same_sign(a, b): return (a <= 0 and b <= 0) or (a >= 0 and b >= 0)
def is_same_slope(x1, y1, x2, y2): return y1/x1 - y2/x2 == 0
scinumber = re.compile(r"[-+]?(\d*\.?)?\d+[eE][-+]?\d+")
@ -2400,7 +2401,7 @@ def cleanPath(element, options):
newPath.append((cmd, data))
path = newPath
# For each h or v, collapse unnecessary coordinates that run in the same direction
# For each m, l, h or v, collapse unnecessary coordinates that run in the same direction
# i.e. "h-100-100" becomes "h-200" but "h300-100" does not change.
# If the path has intermediate markers we have to preserve intermediate nodes, though.
# Reuse the data structure 'path', since we're not adding or removing subcommands.
@ -2411,12 +2412,23 @@ def cleanPath(element, options):
if cmd in ['h', 'v'] and len(data) > 1 and not has_markers:
coordIndex = 1
while coordIndex < len(data):
if isSameSign(data[coordIndex - 1], data[coordIndex]):
if is_same_sign(data[coordIndex - 1], data[coordIndex]):
data[coordIndex - 1] += data[coordIndex]
del data[coordIndex]
_num_path_segments_removed += 1
else:
coordIndex += 1
if cmd in ['m', 'l'] and len(data) > 3 and not has_markers:
coordIndex = 2
while coordIndex < len(data):
if is_same_slope(data[coordIndex-2], data[coordIndex-1], data[coordIndex], data[coordIndex+1]):
data[coordIndex - 2] += data[coordIndex]
data[coordIndex - 1] += data[coordIndex+1]
del data[coordIndex]
del data[coordIndex]
_num_path_segments_removed += 1
else:
coordIndex += 2
# it is possible that we have consecutive h, v, c, t commands now
# so again collapse all consecutive commands of the same type into one command