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import unittest
try:
from fontTools.pens.quartzPen import QuartzPen
from Quartz.CoreGraphics import CGPathApply
from Quartz.CoreGraphics import kCGPathElementMoveToPoint
from Quartz.CoreGraphics import kCGPathElementAddLineToPoint
from Quartz.CoreGraphics import kCGPathElementAddQuadCurveToPoint
from Quartz.CoreGraphics import kCGPathElementAddCurveToPoint
from Quartz.CoreGraphics import kCGPathElementCloseSubpath
PATH_ELEMENTS = {
# CG constant key desc num_points
kCGPathElementMoveToPoint: ('moveto', 1),
kCGPathElementAddLineToPoint: ('lineto', 1),
kCGPathElementAddCurveToPoint: ('curveto', 3),
kCGPathElementAddQuadCurveToPoint: ('qcurveto', 2),
kCGPathElementCloseSubpath: ('close', 0),
}
PYOBJC_AVAILABLE = True
except ImportError:
PYOBJC_AVAILABLE = False
def draw(pen):
pen.moveTo((50, 0))
pen.lineTo((50, 500))
pen.lineTo((200, 500))
pen.curveTo((350, 500), (450, 400), (450, 250))
pen.curveTo((450, 100), (350, 0), (200, 0))
pen.closePath()
def quartzPathApplier(elements, element):
num_points = 0
elem_type = None
if element.type in PATH_ELEMENTS:
num_points = PATH_ELEMENTS[element.type][1]
elem_type = PATH_ELEMENTS[element.type][0]
elements.append((elem_type, element.points.as_tuple(num_points)))
def quartzPathElements(path):
elements = []
CGPathApply(path, elements, quartzPathApplier)
return elements
def quartzPathToString(path):
elements = quartzPathElements(path)
output = []
for element in elements:
elem_type, elem_points = element
path_points = " ".join([f"{p.x} {p.y}" for p in elem_points])
output.append(f"{elem_type} {path_points}")
return " ".join(output)
@unittest.skipUnless(PYOBJC_AVAILABLE, "pyobjc not installed")
class QuartzPenTest(unittest.TestCase):
def test_draw(self):
pen = QuartzPen(None)
draw(pen)
self.assertEqual(
"moveto 50.0 0.0 lineto 50.0 500.0 lineto 200.0 500.0 curveto 350.0 500.0 450.0 400.0 450.0 250.0 curveto 450.0 100.0 350.0 0.0 200.0 0.0 close ",
quartzPathToString(pen.path)
)
def test_empty(self):
pen = QuartzPen(None)
self.assertEqual("", quartzPathToString(pen.path))
if __name__ == '__main__':
import sys
sys.exit(unittest.main())
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