Repeated contours in glyphs

[tamcy]

In this issue “repeated contours” refers to at least two contours that are completely overlapped. I believe they serve no real purpose and are inadvertently duplicated. After all, static fonts will have these overlapped contours removed during build. While they don’t cause usage problems and are certainly not high priority, it may still be worth fixing them someday so that the problem won’t propagate to new glyphs added in the future due to copy and paste.

The following list shows repeated contours as groups. For instance, [1,3] means contours 1 and 3 are repeated (entirely overlapped), and either one of them can be removed.

I first spotted 2 pairs of repeated contours in 肧 (uni80A7-HK), and decided to write a program to find glyphs with similar issue. So the list should be complete.

Glyph	Repeated contour groups
uni2600	(The whole glyph)
uni3229-JP	[1,3];[2,4]
uni3345	[4,6];[5,7]
uni465B-CN	[4,16]
uni5065uE0101-JP	[11,12]
uni56A5-TW	[1,14]
uni5964-JP	[1,12]
uni80A7-HK	[1,3];[2,4]
uni98BC-HK	[5,19]
uniAEF4	[1,8]
uniB1F5	[1,7]
uniB367	[5,7];[6,8]
uniC254	[3,10];[4,11]
uniC3A4	[1,10];[2,11]
uniCAC5	[3,9];[4,10]
uniCAC6	[3,9];[4,10]
uniCAC7	[3,9];[4,10]
uniCAC8	[3,9];[4,10]
uniCAC9	[3,9];[4,10]
uniCACA	[3,9];[4,10]
uniCACB	[3,9];[4,10]
uniCACE	[3,9];[4,10]
uniCAD5	[3,9];[4,10]
uniCAD7	[3,9];[4,10]
uniCB34	[3,9];[4,10]
uniCB35	[1,7];[2,8]
uniCB36	[3,9];[4,10]
uniCB37	[1,7];[2,8]
uniCB38	[1,7];[2,8]
uniCB39	[1,7];[2,8]
uniCB3A	[1,7];[2,8]
uniCB3B	[1,7];[2,8]
uniCB3E	[1,7];[2,8]
uniCB43	[1,7];[2,8]
uniCB45	[2,8];[3,9]
uniCB47	[1,7];[2,8]
uniCB51	[2,8];[3,9]
uniCB52	[2,8];[3,9]
uniCB53	[1,7];[2,8]
uniCB54	[2,8];[3,9]
uniCB55	[2,8];[3,9]
uniCB56	[2,8];[3,9]
uniCB57	[2,8];[3,9]
uniCB5A	[2,8];[3,9]
uniCB5F	[2,8];[3,9]
uniCB61	[2,8];[3,9]
uniCB63	[2,8];[3,9]
uniCBC0	[4,10];[5,11]
uniCBC1	[2,8];[3,9]
uniCBC2	[2,8];[3,9]
uniCBC3	[1,7];[2,8]
uniCBC4	[2,8];[3,9]
uniCBC5	[2,8];[3,9]
uniCBC6	[2,8];[3,9]
uniCBCA	[2,8];[3,9]
uniCBCF	[2,8];[3,9]
uniCBD1	[2,8];[3,9]
uniCBD3	[2,8];[3,9]
uniCBDC	[4,10];[5,11]
uniCBDD	[2,8];[3,9]
uniCBDE	[2,8];[3,9]
uniCBDF	[1,7];[2,8]
uniCBE0	[2,8];[3,9]
uniCBE1	[2,8];[3,9]
uniCBE2	[2,8];[3,9]
uniCBE3	[2,8];[3,9]
uniCBE6	[2,8];[3,9]
uniCBEB	[2,8];[3,9]
uniCBED	[2,8];[3,9]
uniCBEF	[2,8];[3,9]

[punchcutter]

Thanks for the list. I've noticed a few here and there before. I've fixed most of these now. I'll get them all fixed for the next release.