a Eb,@sdZddlZddlmZddlmZddlmZddlm Z ddl m Z m Z m Z mZmZd d gZd Zd ZeeZeZd dZGdddeZddZddZddZddZd!ddZd"dd ZddZd d Z dS)#aConverts cubic bezier curves to quadratic splines. Conversion is performed such that the quadratic splines keep the same end-curve tangents as the original cubics. The approach is iterative, increasing the number of segments for a spline until the error gets below a bound. Respective curves from multiple fonts will be converted at once to ensure that the resulting splines are interpolation-compatible. N) AbstractPen)PointToSegmentPen)ReverseContourPen)curves_to_quadratic)UnequalZipLengthsErrorIncompatibleSegmentNumberErrorIncompatibleSegmentTypesErrorIncompatibleGlyphsErrorIncompatibleFontsErrorfonts_to_quadraticfont_to_quadraticgMbP?z&com.github.googlei18n.cu2qu.curve_typecGs.ttdd|Ddkr"t|tt|S)zyEnsure each argument to zip has the same length. Also make sure a list is returned for python 2/3 compatibility. css|]}t|VqdSNlen).0arS/home/ja/django-apps/lartica_env/lib/python3.9/site-packages/fontTools/cu2qu/ufo.py 7zzip..r)rsetrlist_zip)argsrrrzip2src@sXeZdZdZddZddZddZdd Zd d Zd d Z ddZ ddZ ddZ dS)GetSegmentsPenzPen to collect segments into lists of points for conversion. Curves always include their initial on-curve point, so some points are duplicated between segments. cCsd|_g|_dSr)_last_ptsegmentsselfrrr__init__CszGetSegmentsPen.__init__cGs&|dvr|d|_|j||fdS)N)movelineqcurvecurve)rrappend)r tagrrrr _add_segmentGs zGetSegmentsPen._add_segmentcCs|d|dS)Nr"r)r ptrrrmoveToLszGetSegmentsPen.moveTocCs|d|dS)Nr#r*r+rrrlineToOszGetSegmentsPen.lineTocGs|jd|jg|RdS)Nr$r)rr ZpointsrrrqCurveToRszGetSegmentsPen.qCurveTocGs|jd|jg|RdS)Nr%r/r0rrrcurveToUszGetSegmentsPen.curveTocCs|ddS)Ncloser*rrrr closePathXszGetSegmentsPen.closePathcCs|ddS)Nendr*rrrrendPath[szGetSegmentsPen.endPathcCsdSrr)r Z glyphNameZtransformationrrr addComponent^szGetSegmentsPen.addComponentN) __name__ __module__ __qualname____doc__r!r)r-r.r1r2r4r6r7rrrrr<srcCs"t}t|dd}|||jS)z6Get a glyph's segments as extracted by GetSegmentsPen.T)ZoutputImpliedClosingLine)rrZ drawPointsr)glyphpenZpointPenrrr _get_segmentsbs  r>cCs||}|rt|}|D]\}}|dkr<|j|q |dkrP|j|q |dkrl|j|ddq |dkr|j|ddq |dkr|q |dkr|q t d |q dS) z=Draw segments as extracted by GetSegmentsPen back to a glyph.r"r#r%rNr$r3r5zUnhandled segment type "%s") Z clearContoursZgetPenrr-r.r2r1r4r6AssertionError)r<rreverse_directionr=r(rrrr _set_segmentsus$     rAcstdd|DsJdtdd|D|}t|dtfdd|dd Ds`Jd td }||dd||<d d|DS) z2Return quadratic approximations of cubic segments.css|]}|ddkVqdS)rr%Nrrsrrrrrz)_segments_to_quadratic..zNon-cubic given to convertcSsg|] }|dqS)rrrBrrr rz*_segments_to_quadratic..rc3s|]}t|kVqdSrrrBnrrrrrNzConverted incompatiblycSsg|] }d|fqS)r$r)rprrrrDr)allrrstrget)rmax_errstatsZ new_pointsZ spline_lengthrrEr_segments_to_quadratics & rNc sztdd|D}Wnty0t|Yn0t|s>dS|}g}i}t|D]h\}} | ddtfdd| ddDsd d| D||<nd krt| ||} d }|| qR|rt|} t|| D]\} } t| | |q|rt ||d |S) zDo the actual conversion of a set of compatible glyphs, after arguments have been set up. Return True if the glyphs were modified, else return False. cSsg|] }t|qSr)r>)rgrrrrDrz(_glyphs_to_quadratic..Frc3s|]}|dkVqdS)rNrrBr(rrrrz'_glyphs_to_quadratic..rNcSsg|] }|dqS)rrrBrrrrDrr%T)r) rrrany enumeraterIrNr'rAr ) glyphsrLr@rMZsegments_by_locationZglyphs_modifiedZnew_segments_by_locationZ incompatibleirZnew_segments_by_glyphr< new_segmentsrrPr_glyphs_to_quadratics0     rVFcCs\|dur i}|std}t|ttfr,|}n|gt|}t|t|ksNJt||||S)aConvert the curves of a set of compatible of glyphs to quadratic. All curves will be converted to quadratic at once, ensuring interpolation compatibility. If this is not required, calling glyphs_to_quadratic with one glyph at a time may yield slightly more optimized results. Return True if glyphs were modified, else return False. Raises IncompatibleGlyphsError if glyphs have non-interpolatable outlines. Ni)DEFAULT_MAX_ERR isinstancertuplerrV)rSrLr@rM max_errorsrrrglyphs_to_quadratics r[Tc sX|rjdd|D}t|dkrTtt|}|dkr@tddS|dkrJqjt|nt|dkrjtdd urvir|rtd s|stt |t t frt|t|ksJ|} n|r|gt|} t t t frt|tksJd d t |D} nrfd d |D} d} i} t jdd|DD]} g} g}t || D],\}}| |vrR| || ||qRz| t| ||O} Wn8ty}zt||| | <WYd }~n d }~00q<| rt| | r|rt}tddfdd|D|rT|D],}|jtd}|dkr&d|jt<d} q&| S)aConvert the curves of a collection of fonts to quadratic. All curves will be converted to quadratic at once, ensuring interpolation compatibility. If this is not required, calling fonts_to_quadratic with one font at a time may yield slightly more optimized results. Return True if fonts were modified, else return False. By default, cu2qu stores the curve type in the fonts' lib, under a private key "com.github.googlei18n.cu2qu.curve_type", and will not try to convert them again if the curve type is already set to "quadratic". Setting 'remember_curve_type' to False disables this optimization. Raises IncompatibleFontsError if same-named glyphs from different fonts have non-interpolatable outlines. cSsh|]}|jtdqS)cubic)librKCURVE_TYPE_LIB_KEYrfrrr rz%fonts_to_quadratic..rZ quadraticz%Curves already converted to quadraticFr\z'fonts may contain different curve typesNz4Only one of max_err and max_err_em can be specified.cSsg|]\}}|jj|qSrinfoZ unitsPerEm)rr`errrrDsz&fonts_to_quadratic..csg|]}|jjqSrrbr_) max_err_emrrrDrcss|]}|VqdSr)keysr_rrrrrz%fonts_to_quadratic..zNew spline lengths: %sz, c3s|]}d||fVqdS)z%s: %dNr)rl)rMrrr+sT)rnextiterloggerrcNotImplementedErrorwarning TypeErrorrWrXrrYrrunionr'rVr errorr sortedrfjoinr]rKr^)ZfontsrerLr@rMZ dump_statsZremember_curve_typeZ curve_typesZ curve_typerZmodifiedZ glyph_errorsnamerSZcur_max_errorsfontroexcZspline_lengthsr)rerMrr sx         "     cKst|gfi|S)zConvenience wrapper around glyphs_to_quadratic, for just one glyph. Return True if the glyph was modified, else return False. )r[)r<kwargsrrrglyph_to_quadratic7srwcKst|gfi|S)zConvenience wrapper around fonts_to_quadratic, for just one font. Return True if the font was modified, else return False. )r )rtrvrrrr ?s)NFN)NNFNFT)!r;loggingZfontTools.pens.basePenrZfontTools.pens.pointPenrZ fontTools.pens.reverseContourPenrrerrorsrrr r r __all__rWr^ getLoggerr8rjrrrr>rArNrVr[r rwr rrrrs0       &'  Y