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font-patcher: Correct icon path direction

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[why]
We create fonts with lots of path in the wrong direction. Although that
is usually fine it is not guaranteed to be ok with all renderers.

[how]
Just flatten the inserted glyph and then correct the path directions.

Output a debug message when that made the glyph worse or at least did
not fix the direction.

A complete patched font changes from

======== AurulentSansMNerdFont-Regular_OLD.otf ========
Sum of problems: open 0, intersect 295, direction 5099 (for a total of 9710 glyphs)
======== CaskaydiaCoveNerdFont-Regular_OLD.ttf ========
Sum of problems: open 0, intersect 188, direction 5201 (for a total of 12477 glyphs)

to

======== AurulentSansMNerdFont-Regular_NEW.otf ========
Sum of problems: open 0, intersect 222, direction 4 (for a total of 9710 glyphs)
======== CaskaydiaCoveNerdFont-Regular_NEW.ttf ========
Sum of problems: open 0, intersect 185, direction 0 (for a total of 12477 glyphs)

with

DEBUG: Problematic glyph E0D0 (4 -> 8): uniE0D0
DEBUG: Problematic glyph E261 (8 -> 4): chess-pawn
DEBUG: Problematic glyph E2A2 (4 -> 8): isle
DEBUG: Problematic glyph E74C (4 -> 8): uniE64C
DEBUG: Problematic glyph E767 (4 -> 8): uniE667
DEBUG: Problematic glyph F342 (0 -> 4): QubesOS
DEBUG: Problematic glyph F34E (4 -> 2): OpenSCAD
DEBUG: Problematic glyph F470 (4 -> 8): logo-github
DEBUG: Problematic glyph F0DE4 (8 -> 4): pen-off
DEBUG: Problematic glyph F10F7 (8 -> 4): application-brace
DEBUG: Problematic glyph F1304 (8 -> 4): ski
DEBUG: Problematic glyph F1367 (8 -> 4): sticker-check
DEBUG: Problematic glyph F1675 (8 -> 4): paw-outline

where the bits are
 2 : open path
 4 : self intersecting
 8 : wrong direction

One TTF and one OTF is shown because the standard direction is
opposite for both formats.

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
This commit is contained in:
Fini Jastrow 2024-03-19 01:41:33 +01:00
parent 81e7be81f8
commit b213530f86
1 changed files with 14 additions and 1 deletions
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15
font-patcher
View file

@ -6,7 +6,7 @@
from __future__ import absolute_import, print_function, unicode_literals
# Change the script version when you edit this script:
script_version = "4.10.1"
script_version = "4.11.0"
version = "3.1.1"
projectName = "Nerd Fonts"
@ -1443,6 +1443,19 @@ class font_patcher:
# Paste it
self.sourceFont.selection.select(currentSourceFontGlyph)
self.sourceFont.paste()
# Correct path(s) and check for problems
old_validate = self.sourceFont[currentSourceFontGlyph].validate(True)
self.sourceFont[currentSourceFontGlyph].removeOverlap()
self.sourceFont[currentSourceFontGlyph].correctDirection()
new_validate = self.sourceFont[currentSourceFontGlyph].validate(True)
# Usually self-intersection can not be fixed, so only show if we introduce it
if (new_validate & 0x4 and not (old_validate & 0x4)) or new_validate & (0x8 | 0x2):
logger.debug("Problematic glyph %04X (%X -> %X): %s",
currentSourceFontGlyph, old_validate & 0xE, new_validate & 0xE,
sym_glyph.glyphname)
# Name the glyph
self.sourceFont[currentSourceFontGlyph].glyphname = sym_glyph.glyphname
self.sourceFont[currentSourceFontGlyph].manualHints = True # No autohints for symbols