diff options
Diffstat (limited to 'Lib/fontTools/pens/boundsPen.py')
| -rw-r--r-- | Lib/fontTools/pens/boundsPen.py | 170 |
1 files changed, 86 insertions, 84 deletions
diff --git a/Lib/fontTools/pens/boundsPen.py b/Lib/fontTools/pens/boundsPen.py index 227c22f5..d833cc89 100644 --- a/Lib/fontTools/pens/boundsPen.py +++ b/Lib/fontTools/pens/boundsPen.py @@ -8,91 +8,93 @@ __all__ = ["BoundsPen", "ControlBoundsPen"] class ControlBoundsPen(BasePen): - """Pen to calculate the "control bounds" of a shape. This is the - bounding box of all control points, so may be larger than the - actual bounding box if there are curves that don't have points - on their extremes. - - When the shape has been drawn, the bounds are available as the - ``bounds`` attribute of the pen object. It's a 4-tuple:: - - (xMin, yMin, xMax, yMax). - - If ``ignoreSinglePoints`` is True, single points are ignored. - """ - - def __init__(self, glyphSet, ignoreSinglePoints=False): - BasePen.__init__(self, glyphSet) - self.ignoreSinglePoints = ignoreSinglePoints - self.init() - - def init(self): - self.bounds = None - self._start = None - - def _moveTo(self, pt): - self._start = pt - if not self.ignoreSinglePoints: - self._addMoveTo() - - def _addMoveTo(self): - if self._start is None: - return - bounds = self.bounds - if bounds: - self.bounds = updateBounds(bounds, self._start) - else: - x, y = self._start - self.bounds = (x, y, x, y) - self._start = None - - def _lineTo(self, pt): - self._addMoveTo() - self.bounds = updateBounds(self.bounds, pt) - - def _curveToOne(self, bcp1, bcp2, pt): - self._addMoveTo() - bounds = self.bounds - bounds = updateBounds(bounds, bcp1) - bounds = updateBounds(bounds, bcp2) - bounds = updateBounds(bounds, pt) - self.bounds = bounds - - def _qCurveToOne(self, bcp, pt): - self._addMoveTo() - bounds = self.bounds - bounds = updateBounds(bounds, bcp) - bounds = updateBounds(bounds, pt) - self.bounds = bounds + """Pen to calculate the "control bounds" of a shape. This is the + bounding box of all control points, so may be larger than the + actual bounding box if there are curves that don't have points + on their extremes. + + When the shape has been drawn, the bounds are available as the + ``bounds`` attribute of the pen object. It's a 4-tuple:: + + (xMin, yMin, xMax, yMax). + + If ``ignoreSinglePoints`` is True, single points are ignored. + """ + + def __init__(self, glyphSet, ignoreSinglePoints=False): + BasePen.__init__(self, glyphSet) + self.ignoreSinglePoints = ignoreSinglePoints + self.init() + + def init(self): + self.bounds = None + self._start = None + + def _moveTo(self, pt): + self._start = pt + if not self.ignoreSinglePoints: + self._addMoveTo() + + def _addMoveTo(self): + if self._start is None: + return + bounds = self.bounds + if bounds: + self.bounds = updateBounds(bounds, self._start) + else: + x, y = self._start + self.bounds = (x, y, x, y) + self._start = None + + def _lineTo(self, pt): + self._addMoveTo() + self.bounds = updateBounds(self.bounds, pt) + + def _curveToOne(self, bcp1, bcp2, pt): + self._addMoveTo() + bounds = self.bounds + bounds = updateBounds(bounds, bcp1) + bounds = updateBounds(bounds, bcp2) + bounds = updateBounds(bounds, pt) + self.bounds = bounds + + def _qCurveToOne(self, bcp, pt): + self._addMoveTo() + bounds = self.bounds + bounds = updateBounds(bounds, bcp) + bounds = updateBounds(bounds, pt) + self.bounds = bounds class BoundsPen(ControlBoundsPen): - """Pen to calculate the bounds of a shape. It calculates the - correct bounds even when the shape contains curves that don't - have points on their extremes. This is somewhat slower to compute - than the "control bounds". - - When the shape has been drawn, the bounds are available as the - ``bounds`` attribute of the pen object. It's a 4-tuple:: - - (xMin, yMin, xMax, yMax) - """ - - def _curveToOne(self, bcp1, bcp2, pt): - self._addMoveTo() - bounds = self.bounds - bounds = updateBounds(bounds, pt) - if not pointInRect(bcp1, bounds) or not pointInRect(bcp2, bounds): - bounds = unionRect(bounds, calcCubicBounds( - self._getCurrentPoint(), bcp1, bcp2, pt)) - self.bounds = bounds - - def _qCurveToOne(self, bcp, pt): - self._addMoveTo() - bounds = self.bounds - bounds = updateBounds(bounds, pt) - if not pointInRect(bcp, bounds): - bounds = unionRect(bounds, calcQuadraticBounds( - self._getCurrentPoint(), bcp, pt)) - self.bounds = bounds + """Pen to calculate the bounds of a shape. It calculates the + correct bounds even when the shape contains curves that don't + have points on their extremes. This is somewhat slower to compute + than the "control bounds". + + When the shape has been drawn, the bounds are available as the + ``bounds`` attribute of the pen object. It's a 4-tuple:: + + (xMin, yMin, xMax, yMax) + """ + + def _curveToOne(self, bcp1, bcp2, pt): + self._addMoveTo() + bounds = self.bounds + bounds = updateBounds(bounds, pt) + if not pointInRect(bcp1, bounds) or not pointInRect(bcp2, bounds): + bounds = unionRect( + bounds, calcCubicBounds(self._getCurrentPoint(), bcp1, bcp2, pt) + ) + self.bounds = bounds + + def _qCurveToOne(self, bcp, pt): + self._addMoveTo() + bounds = self.bounds + bounds = updateBounds(bounds, pt) + if not pointInRect(bcp, bounds): + bounds = unionRect( + bounds, calcQuadraticBounds(self._getCurrentPoint(), bcp, pt) + ) + self.bounds = bounds |