Maxi/django-jsignature
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Sebastien Corbin
2022-01-17 13:44:27 +01:00
committed by Sébastien Corbin
parent 63c3d7d2dc
commit 382c824cca
3 changed files with 27 additions and 23 deletions
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14
jsignature/utils.py
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@@ -14,9 +14,13 @@ def draw_signature(data, as_file=False):
`data` can be a json object (list in fact) or a json string
if `as_file` is True, a temp file is returned instead of Image instance
"""
def _remove_empty_pts(pt):
return {'x': list(filter(lambda n: n is not None, pt['x'])), 'y': list(filter(lambda n: n is not None, pt['y']))}
return {
'x': list(filter(lambda n: n is not None, pt['x'])),
'y': list(filter(lambda n: n is not None, pt['y']))
}
if type(data) is str:
drawing = json.loads(data, object_hook=_remove_empty_pts)
elif type(data) is list:
@@ -29,13 +33,13 @@ def draw_signature(data, as_file=False):
height = int(round(max(chain(*[d['y'] for d in drawing])))) + 10
# Draw image
im = Image.new("RGBA", (width*AA, height*AA))
im = Image.new("RGBA", (width * AA, height * AA))
draw = ImageDraw.Draw(im)
for line in drawing:
len_line = len(line['x'])
points = [(line['x'][i]*AA, line['y'][i]*AA)
points = [(line['x'][i] * AA, line['y'][i] * AA)
for i in range(0, len_line)]
draw.line(points, fill="#000", width=2*AA)
draw.line(points, fill="#000", width=2 * AA)
im = ImageOps.expand(im)
# Smart crop
bbox = im.getbbox()