這篇文章示範字體檔案的某一個單字的修改，透過自動化的方式，簡化手動去操作FontForge，可以提升更多的效率。影片示範重點為：

1. 取出字體檔特定的文字
   copy selected glyph out, ex command:
   copy_selected_out.py --input KurewaGothicCjkTc-Regular.sfdir --output new.sfdir --string 揄
2. 修改好的點陣圖轉成向量圖格式
   bmp to svg, ex command:
   potrace -b svg -u 50 orig/U_25540.bmp -o orig/U_25540.bmp.svg
3. svg 匯入字體檔案
   import svg to font, ex command:
   fontforge ~/Documents/sh/import_svg.py --input new.sfdir --svg_path orig --filename_pattern="U_%s.bmp.svg" --filename_source=unicode_int

Youtube 影片：苦累蛙圓體修正錯字示範
https://youtu.be/26ENvQD50cA

相關文章

Max學習字體的筆記
https://codereview.max-everyday.com/font-readme/

字型轉圖片 font to image
https://codereview.max-everyday.com/font-to-image/

dumping SVG outlines into a FontForge file
https://stackoverflow.max-everyday.com/2021/06/dumping-svg-outlines-into-a-fontforge-file/

苦累蛙圓體 Kurewa Gothic
https://max-everyday.com/2021/06/kurewa-gothic/

苦累蛙圓體下載點
https://github.com/max32002/kurewa-gothic

相關網頁：

• 妄想者造字记
  https://zhuanlan.zhihu.com/p/23607678
• 中文像素字体制作
  https://indienova.com/u/hata/blogread/26923
• Converting rasters to SVG, and creating a rudimentary font with font-forge – Part 4 of an XKCD font saga
  https://pelson.github.io/2017/xkcd_font_raster_to_vector_and_basic_font_creation/
• 字体生成小记
  http://www.shushilvshe.com/data/font-build.html
• 幫字型檔補缺字
  https://max-everyday.com/2020/02/how-to-add-new-glyph-to-font/

最後成功後的執行畫面：

上面圖片裡的「桌」是前一篇文章的產物，參考看看：
Python 在圖像上輸出文字
https://stackoverflow.max-everyday.com/2020/12/python-draw-text/

有了 bmp 檔案後，要怎麼變成字型檔案呢？常見的解法是先用 potrace,Inkscape,autotrace 自動描邊的軟體把圖片轉成向量格式，手動的指令可以參考看看：

Looking at the potrace website you can apparently go directly from BMP to SVG.

$ potrace -s input.bmp -o output.svg

autotrace

Another option to potrace is autotrace.

$ autotrace -output-file ouput.svg -output-format svg --color-count 4 input.bmp

You’ll likely have to play with the --color-count to get an image that suites your needs.

有了 .svg 檔案，可以手動在 fontforge 裡做匯入(import)，當然最理想的作法是寫python腳本程式來自動匯入，才會比較有效率和省時間。

直接使用空的字型檔案，或直接匯入 .svg 都會讓圖片產生偏移，奇怪的是坐標內容是正確的，執行結果：

解決這個問題滿簡單的，不要使用空的字型檔，而是去更新一個要修改的字(.glyph) 就可以解決了，max 的 sample code:
https://github.com/max32002/MaxFontScripts/blob/master/bmp2ttf.py

import os

BMP_PATH = './bmp/'
SVG_PATH = './svg/'
FONT_PROJECT= './myfont.sfdir'
FONT_PATH= './myfont.ttf'

import fontforge
# new font.
#font = fontforge.font()
# open exist font.
print("Open font:", FONT_PROJECT)
font=fontforge.open(FONT_PROJECT)

# prepare environment
if not os.path.exists(BMP_PATH):
    # make dir.
    print('mkdir bmp folder')
    os.system('mkdir -p ' + BMP_PATH)

if not os.path.exists(SVG_PATH):
    # make dir.
    print('mkdir svg folder')
    os.system('mkdir -p ' + SVG_PATH)

print('bmp transform to svg...')

for filename in os.listdir(BMP_PATH):
    bmp_filepath = os.path.join(BMP_PATH, filename)
    svg_filename = filename.replace('.bmp','.svg')
    svg_filepath = os.path.join(SVG_PATH, svg_filename)
    command='potrace -s ' + bmp_filepath + ' -o ' + svg_filepath

    try:
        os.system(command)
    except Exception as e:
        print(e)

print('bmp transform to svg finished, move svg image to svg folder.')


print('generate fonts...')

for filename in os.listdir(SVG_PATH):
    svg = os.path.join(SVG_PATH, filename)
    try:
        #image filename example: "U_001234.svg"
        glyph = font.createChar(int('0x'+filename.split('.')[0][-4:], 16) ,filename.split('.')[0]) 
        
        # force overwrite, must clear before import.
        glyph.clear()
        # if .clear() clean too many infomation, use below code instead.
        #glyph.layers[0] = fontforge.layer()
        #glyph.layers[1] = fontforge.layer()

        glyph.importOutlines(svg)

        #glyph.correctDirection()
        glyph.simplify()
        glyph.round()

    except Exception as e:
        print(e)
    except Error as err:
        print(err)

# not necessary to save, save only for debug purpose.
#font.save(FONT_PROJECT)

font.generate(FONT_PATH)
font.close()

print('generate fonts finished.^_^y')









一開始以為 glyph.clear() 會把異體字對應的table清除，實際測試額外的 AltUni2 還有被保留，還沒有去測試 Substitution2 的資料會不會因為 glyph.clear() 造成遺失。



fontforge scripting 官方說明：
https://fontforge.org/docs/scripting/python/fontforge.htm
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			0
		
		
			
		
		
		https://stackoverflow.max-everyday.com/2020/02/python-font/
					https://stackoverflow.max-everyday.com/2020/02/python-font/#respond
		
		
		Mon, 10 Feb 2020 21:39:26 +0000
				
		
		
		http://stackoverflow.max-everyday.com/?p=3216

					
										Max 分享一些關於處理Python中的字體相關工具。








轉換系統



ufo2ft
https://github.com/googlefonts/ufo2ft
可以通過UFO to OTF/TTF



from defcon import Font
from ufo2ft import compileOTF
ufo = Font('MyFont-Regular.ufo')
otf = compileOTF(ufo)
otf.save('MyFont-Regular.otf')



ufo2fdk
https://github.com/robotools/ufo2fdk
從UFO to AFDKO的轉換



UFO Extractor
https://github.com/robotools/extractor
otf/ttf to UFO



>>> import extractor
>>> import defcon
>>> ufo = defcon.Font()
>>> extractor.extractUFO("/path/to/MyFont.ttf", ufo)
>>> ufo.save("/path/to/MyFont.ufo")



fontmake
https://github.com/googlefonts/fontmake
UFO to otf/ttf



Max 實際測試，這不是一般的折騰！遇到問題時，完全無解，參考看看：
https://stackoverflow.max-everyday.com/2020/02/ufo2ft-filtersrunning-removeoverlapsfilter/



AFDKO
https://github.com/adobe-type-tools/afdko
Adobe Font Development Kit for OpenType



Font Merger
https://github.com/iij/fontmerger
合併字型檔案
You can merge some fonts which are regular fonts and symbol fonts(Powerline, Font Awesome) and others.







編輯器



fontParts
https://github.com/robotools/fontParts
An API for interacting with the parts of fonts during the font development process. FontParts is the replacement for RoboFab.
The documentation is at fontparts.readthedocs.io.



defcon
https://github.com/robotools/defcon
A set of UFO based objects for use in font editing applications.



fonttools
https://github.com/fonttools/fonttools
A library to manipulate font files from Python.



The package is listed in the Python Package Index (PyPI), so you can install it with pip:



pip install fonttools



glyphsLib
https://github.com/googlefonts/glyphsLib
A bridge from Glyphs source files (.glyphs) to UFOs



ufoLib2
https://github.com/fonttools/ufoLib2
ufoLib2 is a UFO font library.







其他



ttfautohint-py
https://github.com/fonttools/ttfautohint-py
Python wrapper for ttfautohint, a free auto-hinter for TrueType fonts 



fontbakery
https://github.com/googlefonts/fontbakery
Font quality assurance tool written in Python 3.



kernDump
https://github.com/adobe-type-tools/kern-dump
Scripts for working with and analyzing kerning information







Max 比較建議使用的工具是 FontForge
https://github.com/fontforge/fontforge/releases



還有：Glyphr Studio Desktop



https://github.com/glyphr-studio/Glyphr-Studio-Desktop







相關文章：



Font­Tools 安裝與使用簡明指南
https://stackoverflow.max-everyday.com/2020/02/fonttools/



Awesome Typography
https://github.com/Jolg42/awesome-typography
]]>
					
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			0
		
		
			
		
		
		https://stackoverflow.max-everyday.com/2020/02/fonttools/
					https://stackoverflow.max-everyday.com/2020/02/fonttools/#respond
		
		
		Mon, 10 Feb 2020 21:14:19 +0000
				
		
		http://stackoverflow.max-everyday.com/?p=3213

					
										Max 最近在協助其他的好心人開發免費的字型，順便學一下關於字型的相關技術。




Font­Tools 是一套以 ttx 為核心的工具集，用於處理與字體編輯有關的各種問題，程序用 Python 編寫完成，代碼開源，具有良好的跨平台性。



FontForeg正式版和開發中的版本下載：
https://fontforge.org/en-US/downloads/



官網網站：
https://github.com/fonttools/fonttools



Font­Tools 由以下 4 個程序組成：



ttx 可將字體文件與 xml 文件進行雙向轉換
pyft­merge 可將數個字體文件合併成為一個字體文件
pyft­sub­set 可產生一個由字體的指定字符組成的子集
pyftin­spect 可顯示字體文件的二進制組成信息



安裝 Font­Tools



詳細介紹：
https://pypi.org/project/fonttools/



指令：



pip install fonttools







字體基本知識



一個字體由數個表（ta­ble）構成，字體的信息儲存在表中。一個最基本的字體文件一定會包含以下的表：



cmap: Char­ac­ter to glyph map­ping
head: Font header
hhea: Hor­i­zon­tal header
hmtx: Hor­i­zon­tal met­rics
maxp: Max­i­mum pro­file
name: Nam­ing ta­ble
OS/2: OS/2 and Win­dows spe­cific met­rics
post: Post­Script in­for­ma­tion: 



以上都不知道，也沒差，有個印象就好了。







使用 True­Type 曲線繪制的字體會包含如下的表：



cvt: Con­trol Value Table
fpgm: Font pro­gram
glyf: Glyph data
loca: In­dex to lo­ca­tion
prep: CVT Pro­gram
gasp: Grid-fit­ting/Scan-con­ver­sion (op­tional ta­ble) 



以上都不知道，也沒差，有個印象就好了。







使用 Post­Script 曲線繪制的字體會包含如下的表：



CFF: Post­Script font pro­gram (com­pact font for­mat)
VORG: Ver­ti­cal Ori­gin (op­tional ta­ble)







使用 SVG 曲線繪制的字體會包含如下的表：



SVG: The SVG (Scal­able Vec­tor Graph­ics) ta­ble







使用 Bitmap 圖形構成的字體會包含如下的表：



EBDT: Em­bed­ded bitmap data
EBLC: Em­bed­ded bitmap lo­ca­tion data
EBSC: Em­bed­ded bitmap scal­ing data
CBDT: Color bitmap data
CBLC: Color bitmap lo­ca­tion data







包含高級書法特性的字體會包含如下的表：



BASE: Base­line data
GDEF: Glyph de­f­i­n­i­tion data
GPOS: Glyph po­si­tion­ing data
GSUB: Glyph sub­sti­tu­tion data
JSTF: Jus­ti­fi­ca­tion data
MATH: Math lay­out data







包含其他特性的字體會包含如下的表：



DSIG: Dig­i­tal sig­na­ture
hdmx: Hor­i­zon­tal de­vice met­rics
kern: Kern­ing
LTSH: Lin­ear thresh­old data
PCLT: PCL 5 data
VDMX: Ver­ti­cal de­vice met­rics
vhea: Ver­ti­cal Met­rics header
vmtx: Ver­ti­cal Met­rics
COLR: Color ta­ble
CPAL: Color palette ta­ble 



對字體的修改基本上是圍繞著最上方的基本表進行的，如果要修改字符形態等才需要用到之後的表。



以上都不知道，也沒差，有個印象就好了。







ttx 指令使用說明



ttx 是 Font­Tools 的核心工具，用於將字體轉換為 xml 文件，或者將 xml 文件轉換回字體。ttx 所產生的 xml 文件的後綴名是 ttx，可以用各種文檔編輯器打開進行編輯。



將字體全部的表轉換為 ttx 文件：



$ ttx font.ttf



將 ttx 文件轉換回字體文件。



$ ttx font.ttx







pyft­merge 使用說明



合併字體：



$ pyft­merge font1.otf font2.otf



實測結果：



合併失敗



➜  ttf pyftmerge temp.ttf temp2.ttf       
 WARNING: Dropped cmap subtable from font [0]: format  0, platformID  1, platEncID  0
 WARNING: Dropped cmap subtable from font [1]: format  0, platformID  1, platEncID  0
 Traceback (most recent call last):
   File "/usr/local/bin/pyftmerge", line 8, in <module>
     sys.exit(main())
   File "/usr/local/lib/python2.7/site-packages/fontTools/misc/loggingTools.py", line 375, in wrapper
     return func(*args, **kwds)
   File "/usr/local/lib/python2.7/site-packages/fontTools/merge.py", line 1157, in main
     font = merger.merge(args)
   File "/usr/local/lib/python2.7/site-packages/fontTools/merge.py", line 997, in merge
     table = clazz(tag).merge(self, tables)
   File "/usr/local/lib/python2.7/site-packages/fontTools/merge.py", line 160, in merge
     return m.mergeObjects(self, self.mergeMap, tables)
   File "/usr/local/lib/python2.7/site-packages/fontTools/merge.py", line 1043, in mergeObjects
     value = mergeLogic(getattr(table, key, NotImplemented) for table in tables)
   File "/usr/local/lib/python2.7/site-packages/fontTools/merge.py", line 49, in equal
     assert all(item == first for item in t), "Expected all items to be equal: %s" % lst
 AssertionError: Expected all items to be equal: [1024, 1000]







pyft­sub­set 使用說明



pyft­sub­set 可提取一個字體的部分字符，產生一個只由它們組成的新字體。通過這一子集化技術，可有效縮小字體文件的體積，便於網絡傳輸。



用法：



$ pyft­sub­set font.otf --text="漢字"



–text 選項用於指定需要保留的字符
–text-file 選項用於指定一個包含需要保留的字符的 txt 文檔
–out­put-file 選項用於指定輸出文件的保存位置
]]>
					
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			0
		
		
			
		
		
		https://stackoverflow.max-everyday.com/2020/02/ufo2ft-filtersrunning-removeoverlapsfilter/
					https://stackoverflow.max-everyday.com/2020/02/ufo2ft-filtersrunning-removeoverlapsfilter/#respond
		
		
		Mon, 10 Feb 2020 19:42:38 +0000
				
		
		
		
		http://stackoverflow.max-everyday.com/?p=3210

					
										在使用 fontmake 把 UFO 打包成  ttf 時遇到錯誤，完整錯誤訊息：




INFO:fontmake.font_project:Building TTF for JasonHandwriting2-JasonHandwriting2
 INFO:ufo2ft:Pre-processing glyphs
 INFO:ufo2ft.filters:Running DecomposeComponentsFilter on JasonHandwriting2-JasonHandwriting2
 INFO:ufo2ft.filters:Running RemoveOverlapsFilter on JasonHandwriting2-JasonHandwriting2
 Traceback (most recent call last):
   File "/usr/local/bin/fontmake", line 8, in <module>
     sys.exit(main())
   File "/usr/local/lib/python2.7/site-packages/fontmake/main.py", line 422, in main
     ufo_paths, is_instance=args.pop("masters_as_instances"), **args
   File "/usr/local/lib/python2.7/site-packages/fontmake/font_project.py", line 1026, in run_from_ufos
     self.build_ttfs(ufos, **kwargs)
   File "/usr/local/lib/python2.7/site-packages/fontmake/font_project.py", line 311, in build_ttfs
     self.save_otfs(ufos, ttf=True, *kwargs)   File "/usr/local/lib/python2.7/site-packages/fontTools/misc/loggingTools.py", line 375, in wrapper     return func(args, **kwds)
   File "/usr/local/lib/python2.7/site-packages/fontmake/font_project.py", line 578, in save_otfs
     for font, ufo in zip(fonts, ufos):
   File "/usr/local/lib/python2.7/site-packages/fontmake/font_project.py", line 441, in iter_compile     yield compile_func(ufo, **options)   File "/usr/local/lib/python2.7/site-packages/ufo2ft/init.py", line 198, in compileTTF     glyphSet = preProcessor.process()   File "/usr/local/lib/python2.7/site-packages/ufo2ft/preProcessor.py", line 49, in process     func(ufo, glyphSet)   File "/usr/local/lib/python2.7/site-packages/ufo2ft/filters/init.py", line 219, in call     if include(glyph) and filter(glyph):
   File "/usr/local/lib/python2.7/site-packages/ufo2ft/filters/removeOverlaps.py", line 50, in filter
     self.union(contours, pen)
   File "/usr/local/lib/python2.7/site-packages/booleanOperations/booleanOperationManager.py", line 101, in union
     return _performOperation("union", contours, [], outPen)
   File "/usr/local/lib/python2.7/site-packages/booleanOperations/booleanOperationManager.py", line 70, in _performOperation
     subjectInputContours = [InputContour(contour) for contour in subjectContours if contour and len(contour) > 1]
   File "/usr/local/lib/python2.7/site-packages/booleanOperations/flatten.py", line 69, in init
     self.segments = _convertPointsToSegments(points)
   File "/usr/local/lib/python2.7/site-packages/booleanOperations/flatten.py", line 441, in _convertPointsToSegments
     willBeReversed=willBeReversed
   File "/usr/local/lib/python2.7/site-packages/booleanOperations/flatten.py", line 171, in init
     for pt1, pt2 in decomposeQuadraticSegment(pointCoordinates[1:]):
   File "/usr/local/lib/python2.7/site-packages/fontTools/pens/basePen.py", line 360, in decomposeQuadraticSegment
     assert n > 0
 AssertionError







解法：先使用 fontmake -h 查看沒有可以使用的參數，找到關於 overlaps



Handling of contours:
   --keep-overlaps       Do not remove any overlap.
   --overlaps-backend BACKEND
                         Select library to remove overlaps. Choose between:
                         booleanOperations, pathops (default:
                         booleanOperations)







由於 pathops 在 python2 已無法使用，python3 的安裝方法：



pip3 install --upgrade skia-pathops



由於直接執行 fontmake 會使用 python2 來執行，所以指令改成：



python3 -m fontmake







在 python3 使用 booleanOperations 



錯誤訊息：



INFO:fontmake.font_project:Building TTF for JasonHandwriting2-JasonHandwriting2
 INFO:ufo2ft:Pre-processing glyphs
 INFO:ufo2ft.filters:Running DecomposeComponentsFilter on JasonHandwriting2-JasonHandwriting2
 INFO:ufo2ft.filters:Running RemoveOverlapsFilter on JasonHandwriting2-JasonHandwriting2
 ERROR:ufo2ft.filters.removeOverlaps:Failed to remove overlaps for glyph00004
 Traceback (most recent call last):
   File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/runpy.py", line 193, in run_module_as_main     "main", mod_spec)   File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/runpy.py", line 85, in _run_code     exec(code, run_globals)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/main.py", line 471, in <module>     sys.exit(main())   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/main.py", line 460, in main     ufo_paths, is_instance=args.pop("masters_as_instances"), **args   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 1019, in run_from_ufos     self.build_ttfs(ufos, **kwargs)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 208, in build_ttfs     self.save_otfs(ufos, ttf=True, *kwargs)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontTools/misc/loggingTools.py", line 367, in wrapper     return func(args, **kwds)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 480, in save_otfs
     for font, ufo in zip(fonts, ufos):
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 345, in _iter_compile
     yield compile_func(ufo, debugFeatureFile=debugFeatureFile, **options)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/init.py", line 198, in compileTTF
     glyphSet = preProcessor.process()
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/preProcessor.py", line 49, in process
     func(ufo, glyphSet)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/filters/init.py", line 219, in call
     if include(glyph) and filter(glyph):
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/filters/removeOverlaps.py", line 50, in filter
     self.union(contours, pen)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/booleanOperationManager.py", line 100, in union
     return _performOperation("union", contours, [], outPen)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/booleanOperationManager.py", line 69, in _performOperation
     subjectInputContours = [InputContour(contour) for contour in subjectContours if contour and len(contour) > 1]
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/booleanOperationManager.py", line 69, in <listcomp>
     subjectInputContours = [InputContour(contour) for contour in subjectContours if contour and len(contour) > 1]
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/flatten.py", line 68, in init
     self.segments = _convertPointsToSegments(points)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/flatten.py", line 448, in _convertPointsToSegments
     point.segmentType
 booleanOperations.exceptions.UnsupportedContourError: ('Trying to perform operation on unsupported segment type.', 'qcurve')







改用 pathops，一樣有錯誤：



INFO:fontmake.font_project:Building TTF for JasonHandwriting2-JasonHandwriting2
 INFO:ufo2ft:Pre-processing glyphs
 INFO:ufo2ft.filters:Running DecomposeComponentsFilter on JasonHandwriting2-JasonHandwriting2
 INFO:ufo2ft.filters:Running RemoveOverlapsFilter on JasonHandwriting2-JasonHandwriting2
 ERROR:ufo2ft.filters.removeOverlaps:Failed to remove overlaps for glyph00004
 Traceback (most recent call last):
   File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/runpy.py", line 193, in run_module_as_main     "main", mod_spec)   File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/runpy.py", line 85, in _run_code     exec(code, run_globals)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/main.py", line 471, in <module>     sys.exit(main())   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/main.py", line 460, in main     ufo_paths, is_instance=args.pop("masters_as_instances"), **args   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 1019, in run_from_ufos     self.build_ttfs(ufos, **kwargs)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 208, in build_ttfs     self.save_otfs(ufos, ttf=True, *kwargs)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontTools/misc/loggingTools.py", line 367, in wrapper     return func(args, **kwds)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 480, in save_otfs
     for font, ufo in zip(fonts, ufos):
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 345, in _iter_compile
     yield compile_func(ufo, debugFeatureFile=debugFeatureFile, **options)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/init.py", line 198, in compileTTF
     glyphSet = preProcessor.process()
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/preProcessor.py", line 49, in process
     func(ufo, glyphSet)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/filters/init.py", line 219, in call
     if include(glyph) and filter(glyph):
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/filters/removeOverlaps.py", line 50, in filter
     self.union(contours, pen)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/booleanOperationManager.py", line 100, in union
     return performOperation("union", contours, [], outPen)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/booleanOperationManager.py", line 69, in _performOperation     subjectInputContours = [InputContour(contour) for contour in subjectContours if contour and len(contour) > 1]   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/booleanOperationManager.py", line 69, in <listcomp>     subjectInputContours = [InputContour(contour) for contour in subjectContours if contour and len(contour) > 1]   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/flatten.py", line 68, in init     self.segments = _convertPointsToSegments(points)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/booleanOperations/flatten.py", line 448, in _convertPointsToSegments     point.segmentType booleanOperations.exceptions.UnsupportedContourError: ('Trying to perform operation on unsupported segment type.', 'qcurve') ➜  ttf ./build_jason_font2.sh INFO:fontmake.font_project:Building TTF for JasonHandwriting2-JasonHandwriting2 INFO:ufo2ft:Pre-processing glyphs INFO:ufo2ft.filters:Running DecomposeComponentsFilter on JasonHandwriting2-JasonHandwriting2 INFO:ufo2ft.filters:Running RemoveOverlapsFilter on JasonHandwriting2-JasonHandwriting2 Traceback (most recent call last):   File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/runpy.py", line 193, in _run_module_as_main     "main", mod_spec)   File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/runpy.py", line 85, in _run_code     exec(code, run_globals)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/main.py", line 471, in <module>     sys.exit(main())   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/main.py", line 460, in main     ufo_paths, is_instance=args.pop("masters_as_instances"), **args   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 1019, in run_from_ufos     self.build_ttfs(ufos, **kwargs)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 208, in build_ttfs     self.save_otfs(ufos, ttf=True, *kwargs)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontTools/misc/loggingTools.py", line 367, in wrapper     return func(args, **kwds)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 480, in save_otfs
     for font, ufo in zip(fonts, ufos):
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontmake/font_project.py", line 345, in _iter_compile
     yield compile_func(ufo, debugFeatureFile=debugFeatureFile, *options)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/init.py", line 198, in compileTTF     glyphSet = preProcessor.process()   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/preProcessor.py", line 49, in process     func(ufo, glyphSet)   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/filters/init.py", line 219, in call     if include(glyph) and filter(glyph):
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufo2ft/filters/removeOverlaps.py", line 50, in filter
     self.union(contours, pen)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/pathops/operations.py", line 10, in union
     contour.draw(pen)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufoLib2/objects/contour.py", line 54, in draw
     self.drawPoints(pointPen)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/ufoLib2/objects/contour.py", line 78, in drawPoints
     pointPen.endPath()
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontTools/pens/pointPen.py", line 140, in endPath
     self._flushContour(segments)
   File "/Users/chunyuyao/Library/Python/3.7/lib/python/site-packages/fontTools/pens/pointPen.py", line 211, in _flushContour
     pen.qCurveTo(points)
   File "src/python/pathops/_pathops.pyx", line 700, in pathops._pathops.PathPen.qCurveTo
   File "src/python/pathops/_pathops.pyx", line 703, in pathops._pathops.PathPen._qCurveToOne
 TypeError: 'NoneType' object is not subscriptable
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