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font-patcher: Drop box-drawing from SymbolsOnly

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[why]
The Box Drawing glyphs need to be carefully scaled. This can not be done
if the glyphs are pulled in via font-fallback I guess.

As people may have the fontconfig set up in a way to prefer the Symbols
Only font these glyphs could overrule other box drawing glyphs that
might fit better.

I'm not really sure about this one, but the glyphs look rather bad
anyhow, because they end up in the 1:1 ascpect ratio cell of the Symbols
Only font.

[how]
Just turn the set off if we patch the Symbols Only font.
Need to swap around two subroutine calls for that; first detect if we
are patching the Symbols Only font (through the font metrics) and then
set the patch sets up.

Fixes: #1210

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
This commit is contained in:
Fini Jastrow 2023-05-07 09:52:24 +02:00 committed by Fini
parent 417acefb2f
commit 7e0c17c294
1 changed files with 3 additions and 3 deletions
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6
font-patcher
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@ -324,7 +324,7 @@ class font_patcher:
self.font_dim = None # class 'dict'
self.font_extrawide = False
self.source_monospaced = None # Later True or False
self.symbolsonly = False
self.symbolsonly = False # Are we generating the SymbolsOnly font?
self.onlybitmaps = 0
self.essential = set()
self.config = configparser.ConfigParser(empty_lines_in_values=False, allow_no_value=True)
@ -337,8 +337,8 @@ class font_patcher:
self.setup_name_backup(font)
self.assert_monospace()
self.remove_ligatures()
self.setup_patch_set()
self.get_sourcefont_dimensions()
self.setup_patch_set()
self.improve_line_dimensions()
self.sourceFont.encoding = 'UnicodeFull' # Update the font encoding to ensure that the Unicode glyphs are available
self.onlybitmaps = self.sourceFont.onlybitmaps # Fetch this property before adding outlines. NOTE self.onlybitmaps initialized and never used
@ -784,7 +784,7 @@ class font_patcher:
def setup_patch_set(self):
""" Creates list of dicts to with instructions on copying glyphs from each symbol font into self.sourceFont """
box_enabled = self.source_monospaced # Box glyph only for monospaced
box_enabled = self.source_monospaced and not self.symbolsonly # Box glyph only for monospaced and not for Symbols Only
box_keep = False
if box_enabled:
self.sourceFont.selection.select(("ranges",), 0x2500, 0x259f)