jke-dZddlZddlmZddlmZddlmZddlm Z ddl m Z m Z m Z mZmZd d gZd Zd Zej&eZeZd ZGddeZdZdZddZddZ ddZ ddZdZdZ y)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_typecpttd|Ddk7rt|tt |S)zyEnsure each argument to zip has the same length. Also make sure a list is returned for python 2/3 compatibility. c32K|]}t|ywNlen).0as 5/usr/lib/python3/dist-packages/fontTools/cu2qu/ufo.py zzip..<s$!s1v$sr)rsetrlist_zip)argss rzipr7s6  3$t$ $%*$d++ d cFeZdZdZdZdZdZdZdZdZ dZ d Z d Z y ) 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. c d|_g|_yr)_last_ptsegmentsselfs r__init__zGetSegmentsPen.__init__Hs  rcZ|dvr |d|_|jj||fy)N)movelineqcurvecurve)r!r"append)r$tagrs r _add_segmentzGetSegmentsPen._add_segmentLs, 5 5 HDM c4[)rc(|jd|y)Nr'r.r$pts rmoveTozGetSegmentsPen.moveToQ &"%rc(|jd|y)Nr(r0r1s rlineTozGetSegmentsPen.lineToTr4rc@|jd|jg|y)Nr)r.r!r$pointss rqCurveTozGetSegmentsPen.qCurveToWs(DMM;F;rc@|jd|jg|y)Nr*r8r9s rcurveTozGetSegmentsPen.curveToZs'4==:6:rc&|jdy)Ncloser0r#s r closePathzGetSegmentsPen.closePath]s '"rc&|jdy)Nendr0r#s rendPathzGetSegmentsPen.endPath`s % rcyr)r$ glyphNametransformations r addComponentzGetSegmentsPen.addComponentcs rN) __name__ __module__ __qualname____doc__r%r.r3r6r;r=r@rCrHrErrrrAs4 * &&<;#! rrcjt}t|d}|j||jS)z6Get a glyph's segments as extracted by GetSegmentsPen.T)outputImpliedClosingLine)rr drawPointsr")glyphpenpointPens r _get_segmentsrSgs2  C!tDH X <<rc|j|j}|r t|}|D]\}}|dk(r|j||dk(r|j|0|dk(r|j |ddH|dk(r|j |dd`|dk(r|jv|dk(r|jtd |zy) z=Draw segments as extracted by GetSegmentsPen back to a glyph.r'r(r*rNr)r?rBzUnhandled segment type "%s") clearContoursgetPenrr3r6r=r;r@rCAssertionError)rPr"reverse_directionrQr-rs r _set_segmentsrYzs  ,,.C$F T &= CJJ  F] CJJ  G^ CKKab " H_ CLL$qr( # G^ MMO E\ KKM !>!DE EFrctd|DsJdt|Dcgc]}|d c}||}t|dtfd|ddDsJdtdz }|j |ddz||<|sd k(r|Dcgc]}d |fc}S|Dcgc]}d |fc}Scc}wcc}wcc}w) z2Return quadratic approximations of cubic segments.c3,K|] }|ddk(yw)rr*NrE)rss rrz)_segments_to_quadratic..s11qtw1szNon-cubic given to convertrrc3:K|]}t|k(ywrr)rr\ns rrz)_segments_to_quadratic..s3qs1v{3sNzConverted incompatiblyr)r*)allrrstrget) r"max_errstats all_quadraticr\ new_points spline_lengthpr^s @r_segments_to_quadraticrjs 11 1O3OO 1$H%=qad%=w VJ JqMA 3JqrN3 3M5MM 3AJM 99]A6:E-Q'12!1 22&01! 11&>31s B6 B;( Cc t|Dcgc] }t|c}}t |sy|}g}i} t |D]j\} } | ddt fd| ddDs| D cgc]} | d c} | | <ndk(rt| |||} |s| | k7rd}| } |j| l|r)t|}t||D]\}} t|| || r t|| |Scc}w#t$r t|wxYwcc} w) 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. Frc3.K|] }|dk(yw)rNrE)rr\r-s rrz'_glyphs_to_quadratic..s511Q43;5srNr*T)r") rrSrr any enumeraterarjr,rYr )glyphsrdrXrerfgsegments_by_locationglyphs_modifiednew_segments_by_location incompatibleir"r\ new_segmentsnew_segments_by_glyphrPr-s @r_glyphs_to_quadraticrxsK5"v$F!]1%5$FG # $(O!L !56 2 8qk!n5 55-56qt6LO G^1'5-L  8"&#H ''1 2 #%= >#&v/D#E B E< %/@ A B+F\JJ ?%G !5,V4457s! C-C(C-( D(C--Dc|i}|s tdz}t|ttfr|}n|gt |z}t |t |k(sJt |||||S)aConvert the curves of a set of compatible of glyphs to quadratic. All curves will be converted to quadratic at once, ensuring interpolation compatibility. If this is not required, calling glyphs_to_quadratic with one glyph at a time may yield slightly more optimized results. Return True if glyphs were modified, else return False. Raises IncompatibleGlyphsError if glyphs have non-interpolatable outlines. i)DEFAULT_MAX_ERR isinstancertuplerrx)rordrXrerf max_errorss rglyphs_to_quadraticr~sm } !D('D%=) YV, z?c&k )) )  -um rc |r|Dchc]"}|jjtd$} }t| dk(r?t t | } | dvrt jdy| dk(rn.t| t| dkDrt jdi|r |r td|s|st}t|ttfrt|t|k(sJ|} n|r|gt|z} t|ttfrOt|t|k(sJt||D cgc]\}} |jj | z } }} n(|r&|Dcgc]}|jj |z} }d} i}t#j$d |DD]W}g}g}t| D]/\}}||vs |j'|||j'|1 | t)||||z} Y|r t/|| rK|rIt1j3}t jd d j5fd |Dz|rH|D]C}|jjtd} |rd nd}| |k7s/||jt<d} E| Scc}wcc} }wcc}w#t*$r%}t j-||||<Yd}~9d}~wwxYw)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. cubicr) quadraticmixedz%Curves already converted to quadraticFz'fonts may contain different curve typesNz4Only one of max_err and max_err_em can be specified.c3<K|]}|jywr)keys)rfs rrz%fonts_to_quadratic..-s61affh6szNew spline lengths: %sz, c32K|]}d||fzyw)z%s: %dNrE)rlres rrz%fonts_to_quadratic..CsJaQaM1JsrrT)librcCURVE_TYPE_LIB_KEYrnextiterloggerinfoNotImplementedErrorwarning TypeErrorrzr{rr|r unitsPerEmrunionr,rxr errorr sortedrjoin)fonts max_err_emrdrXre dump_statsremember_curve_typerfr curve_types curve_typer}emodified glyph_errorsnamerocur_max_errorsfontrexcspline_lengthsnew_curve_types ` rr r s6GLM!quuyy!3W=M M { q d;/0J33 CDw&)*55   ! NND E }gNOO '$ 'D%=)7|s5z))) YU+ *tUm,5zS_,,,8;E:8NO1aff''!+O O >CDaff''*4D DHL 667 %uj1 -KD%t| d4j)%%e, - % ,(95- H %$\22J - $yyJ>JJ L  D&8'BJ,9[wN^+/=+,  OIN<PD' % LL !$L  %s)'J0?#J5, J;6K K. K))K.c t|gfi|S)zConvenience wrapper around glyphs_to_quadratic, for just one glyph. Return True if the glyph was modified, else return False. )r~)rPkwargss rglyph_to_quadraticrPs w 1& 11rc t|gfi|S)zConvenience wrapper around fonts_to_quadratic, for just one font. Return True if the font was modified, else return False. )r )rrs rrrXs tf / //r)T)NFNT)NNFNFTT)!rLloggingfontTools.pens.basePenrfontTools.pens.pointPenr fontTools.pens.reverseContourPenrrerrorsrr r r r __all__rzr getLoggerrIrrrrrSrYrjrxr~r rrrErrrs .5>! !4 5 =   8 $ # [# L&F02$'VNRB  `F20r