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font: load fallback fonts on demand

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When instantiating a primary font, build the fallback font list, but
don't actually instantiate the fallback fonts.

Instead, remember the (full) pattern that we should use if/when we
instantiate it.

Then, when looking up a glyph and we need a fallback font, loop the
list and instantiate the font(s) there and then.
This commit is contained in:
Daniel Eklöf 2019-10-17 17:53:03 +02:00
parent e218e19ea3
commit 3c42691e1b
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GPG key ID: 5BBD4992C116573F
2 changed files with 35 additions and 19 deletions
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7
font.h
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@ -29,6 +29,11 @@ struct glyph {
typedef tll(struct glyph) hash_entry_t;
struct font_fallback {
char *pattern;
struct font *font;
};
struct font {
char *name;
@ -52,7 +57,7 @@ struct font {
} strikeout;
bool is_fallback;
tll(struct font *) fallbacks;
tll(struct font_fallback) fallbacks;
size_t ref_counter;