U md2@sddlZddlmZmZddlmZddlmZddlm Z ddl m Z ddl m Z Gdd d eZ Gd d d e ZGd d d ZdS)N)curve_to_quadraticcurves_to_quadratic)decomposeSuperBezierSegment) FilterPenReverseContourPen)BasePointToSegmentPen)ReverseContourPointPencs6eZdZdZd fdd ZfddZd d ZZS) Cu2QuPena A filter pen to convert cubic bezier curves to quadratic b-splines using the FontTools SegmentPen protocol. Args: 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. FNTcs.|r t|}t|||_||_||_dSN)rsuper__init__max_errstats all_quadratic)selfZ other_penrreverse_directionrr __class__P/home/sam/Atlas/atlas_env/lib/python3.8/site-packages/fontTools/pens/cu2quPen.pyr )s  zCu2QuPen.__init__cs|j|||f}t||j|j}|jdk rPtt|d}|j|dd|j|<|jrj|j|ddnDt|dkr|j|ddn$t|dkst t j |dddS)Nr) current_ptrrrrstrlengetqCurveToAssertionErrorr curveTo)rZpt1Zpt2Zpt3curveresultnrrr_convert_curve8s  zCu2QuPen._convert_curvecGsLt|}|dkr|j|n,|dkr>t|D]}|j|q,n |j|dS)Nr)rr%rr)rpointsr$segmentrrrr!Gs  zCu2QuPen.curveTo)FNT)__name__ __module__ __qualname____doc__r r%r! __classcell__rrrrr s r c@s`eZdZdZdejfdejfdejfdejfdZdd d Zd d Z d dZ ddZ ddZ dS) Cu2QuPointPenaA filter pen to convert cubic bezier curves to quadratic b-splines using the FontTools PointPen protocol. Args: 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. rrr)movelineqcurver"FNTcCs6t||rt||_n||_||_||_||_dSr )rr r penrrr)rZother_point_penrrrrrrrr js  zCu2QuPointPen.__init__cCst|dkst|dddk}g}|dd}|dd}|D]\}}|dkrF||D]}|d\} } } } |dd|dd} }|| || g}t||j|j}|jdk rtt|d}|j|dd|j|<dd|ddD}| | | | | f|jst|dkr(| d |gn| d|g|dd}q^q@| ||g|dd}q@|r|dd|dd}| |dS) Nrrr.r"rcSsg|]}|ddifqS)FNr).0ptrrr sz/Cu2QuPointPen._flushContour..r0) rr _split_super_bezier_segmentsrrrrrrappend _drawPoints)rsegmentsclosed new_segmentsZ prev_pointsZ prev_on_curve segment_typer& sub_pointson_curvesmoothnamekwargsZbcp1Zbcp2Zcubicquadr$Z new_pointsrrr _flushContour{s4     zCu2QuPointPen._flushContourc Csg}t|d}|dkr$||n|dkr|d\}}}}|d}ttdd|DD]p\} } g} | ddD]} | | ddifqr| |dkr| ||||fn| | dddif|| qZn td||S) Nrrr2cSsg|]\}}}}|qSrr)r3r4_rrrr5s z>Cu2QuPointPen._split_super_bezier_segments..FTz$expected 2 control points, found: %d)rr7 enumeraterr ) rr&Z sub_segmentsr$r>r?r@rAZnum_sub_segmentsir=Z new_segmentpointrrrr6s&     z*Cu2QuPointPen._split_super_bezier_segmentsc Cs(|j}|g}|j}t|D]\}\}}||kr||\}} | t||sltd|d|dt||dd} |dkr| }n&| D] \} } } }|j| d| | f|q|d\} } } }| dkr|dkstq|j| || | f|q td|q |D] \} } } }|j| d| | f|q|dS)Nzillegal z segment point count: expected z, got r2rr0zunexpected segment type: %r)r1Z beginPath_Cu2QuPointPen__points_requiredrErr ZaddPointendPath)rr9r1Zlast_offcurvesZpoints_requiredrFr<r&r$opZ offcurvesr4r?r@rArrrr8s0   zCu2QuPointPen._drawPointscCs |jdkst|j||dSr )Z currentPathr r1 addComponent)rZ baseGlyphNameZtransformationrrrrKszCu2QuPointPen.addComponent)FNT) r(r)r*r+operatoreqgerHr rCr6r8rKrrrrr-Ss  !#r-c@sreZdZdZdddZddZddZd d Zd d Zd dZ ddZ ddZ ddZ ddZ ddZddZdS) Cu2QuMultiPenaA filter multi-pen to convert cubic bezier curves to quadratic b-splines in a interpolation-compatible manner, using the FontTools SegmentPen protocol. Args: 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. 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