def svgToPath(filename):
"""Return QPainterPath instance from an svg file.
No colors will be included. If the file contains multiple paths,
they will be connected to form one single path.
It will also return a boolean indicates if the path is closed or not."""
path = QPainterPath()
info = findPath(filename)
start = QPointF(0, 0)
last_cp = start # last control point, for S cubic bezier curve.
last_qp = start # last control point, for T quadratic bezier curve.
for idx in range(len(info)):
line = info[idx]
cmd = line[0]
if (cmd.upper() == 'Z'):
path.closeSubpath()
continue
coords = re.split(r'\s+|,|(?<=\d)(?=-)', line[1])
if (cmd.upper() == 'V'):
# only last coordinate matters.
coord = eval(coords[-1])
verticalLineTo(path, coord, cmd)
continue
if (cmd.upper() == 'H'):
# only last coordinate matters.
coord = eval(coords[-1])
horizontalLineTo(path, coord, cmd)
continue
# pair two values into one
coords = [x+','+y for x, y in zip(coords[::2], coords[1::2])]
coords = list(map(getPoint, coords))
if (cmd.upper() == 'M'):
# if m is at the start of the path
if (line == info[0]):
start = coords[0]
moveTo(path, start, 'M')
# m is not at the start of the path
else:
path.closeSubpath()
lineTo(path, coords[0], cmd)
for i in range(1, len(coords)):
lineTo(path, coords[i], cmd)
continue
if (cmd.upper() == 'L'):
for coord in coords:
lineTo(path, coord, cmd)
continue
if (cmd.upper() == 'C'):
for i in range(len(coords)//3):
# Saving coordinates for smoothcurve command
last_cp = cubicTo(path, *coords[i*3:i*3+3], absolute=cmd)
continue
if (cmd.upper() == 'S'):
if not (info[idx-1][0].upper() in 'SC'):
last_cp = path.currentPoint()
for i in range(len(coords)//2):
last_cp = smoothCubicTo(path, last_cp,
*coords[i*2:i*2+2], absolute=cmd)
continue
if (cmd.upper() == 'Q'):
for i in range(len(coords)//2):
# Saving coordinates for T smooth curve command
last_qp = quadTo(path, *coords[i*2:i*2+2], absolute=cmd)
continue
if (cmd.upper() == 'T'):
if not (info[idx-1][0].upper() in 'QT'):
last_qp = path.currentPoint()
for coord in coords:
last_qp = smoothQuadTo(path, last_qp, coord, absolute=cmd)
continue
raise Exception('svg file contains command {}, which is not supported'
.format(cmd))
closed = True
if ((abs((path.currentPosition() - start).x()) > 1) and
(abs((path.currentPosition() - start).y()) > 1)):
closed = False
path.translate(-start)
path.translate(-path.boundingRect().center())
return path, closed
