cu2quPen

class fontTools.pens.cu2quPen.Cu2QuPen(other_pen, max_err, reverse_direction=False, stats=None, all_quadratic=True)[source]

Bases: FilterPen

A filter pen to convert cubic bezier curves to quadratic b-splines using the FontTools SegmentPen protocol.

Parameters:

  • other_pen – another SegmentPen used to draw the transformed outline.

  • max_err – maximum approximation error in font units. For optimal results, if you know the UPEM of the font, we recommend setting this to a value equal, or close to UPEM / 1000.

  • reverse_direction – flip the contours’ direction but keep starting point.

  • stats – a dictionary counting the point numbers of quadratic segments.

  • all_quadratic – if True (default), only quadratic b-splines are generated. if False, quadratic curves or cubic curves are generated depending on which one is more economical.

curveTo(*points)[source]
class fontTools.pens.cu2quPen.Cu2QuPointPen(other_point_pen, max_err, reverse_direction=False, stats=None, all_quadratic=True)[source]

Bases: BasePointToSegmentPen

A filter pen to convert cubic bezier curves to quadratic b-splines using the FontTools PointPen protocol.

Parameters:

  • other_point_pen – another PointPen used to draw the transformed outline.

  • max_err – maximum approximation error in font units. For optimal results, if you know the UPEM of the font, we recommend setting this to a value equal, or close to UPEM / 1000.

  • reverse_direction – reverse the winding direction of all contours.

  • stats – a dictionary counting the point numbers of quadratic segments.

  • all_quadratic – if True (default), only quadratic b-splines are generated. if False, quadratic curves or cubic curves are generated depending on which one is more economical.

addComponent(baseGlyphName, transformation)[source]
class fontTools.pens.cu2quPen.Cu2QuMultiPen(other_pens, max_err, reverse_direction=False)[source]

Bases: object

A filter multi-pen to convert cubic bezier curves to quadratic b-splines in a interpolation-compatible manner, using the FontTools SegmentPen protocol.

Parameters:

  • other_pens – list of SegmentPens used to draw the transformed outlines.

  • max_err – maximum approximation error in font units. For optimal results, if you know the UPEM of the font, we recommend setting this to a value equal, or close to UPEM / 1000.

  • reverse_direction – flip the contours’ direction but keep starting point.

This pen does not follow the normal SegmentPen protocol. Instead, its moveTo/lineTo/qCurveTo/curveTo methods take a list of tuples that are arguments that would normally be passed to a SegmentPen, one item for each of the pens in other_pens.

moveTo(pts)[source]
lineTo(pts)[source]
qCurveTo(pointsList)[source]
curveTo(pointsList)[source]
closePath()[source]
endPath()[source]
addComponent(glyphName, transformations)[source]