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[coretext] "Fix" crashes on CoreText < 10.10

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Fixes https://github.com/behdad/harfbuzz/issues/297
This commit is contained in:
Behdad Esfahbod 2016-07-22 17:41:43 -07:00
parent a732e00ea4
commit 489acf6c31
1 changed files with 8 additions and 0 deletions
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8
src/hb-coretext.cc
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@ -145,6 +145,14 @@ create_ct_font (CGFontRef cg_font, CGFloat font_size)
DEBUG_MSG (CORETEXT, cg_font, "Font CTFontCreateWithGraphicsFont() failed");
return NULL;
}
/* crbug.com/576941 and crbug.com/625902 and the investigation in the latter
* bug indicate that the cascade list reconfiguration occasionally causes
* crashes in CoreText on OS X 10.9, thus let's skip this step on older
* operating system versions. */
if (&CTGetCoreTextVersion != NULL && CTGetCoreTextVersion() < kCTVersionNumber10_10)
return ct_font;
CFURLRef original_url = (CFURLRef)CTFontCopyAttribute(ct_font, kCTFontURLAttribute);
/* Create font copy with cascade list that has LastResort first; this speeds up CoreText