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[coretext] Fix build

This commit is contained in:
Behdad Esfahbod 2017-10-13 10:30:19 +02:00
parent 95883fc5d4
commit c2cf68dbdf
1 changed files with 8 additions and 3 deletions
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11
src/hb-coretext.cc
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@ -38,13 +38,18 @@
#endif
/* https://developer.apple.com/documentation/coretext/1508745-ctfontcreatewithgraphicsfont */
#define HB_CORETEXT_DEFAULT_FONT_SIZE 12f
#define HB_CORETEXT_DEFAULT_FONT_SIZE 12.f
static CGFloat
coretext_font_size (float ptem)
{
ptem *= 96f / 72f;
return ptem <= 0f ? HB_CORETEXT_DEFAULT_FONT_SIZE : ptem;
/* CoreText points are CSS pixels (96 per inch),
* NOT typographic points (72 per inch).
*
* https://developer.apple.com/library/content/documentation/GraphicsAnimation/Conceptual/HighResolutionOSX/Explained/Explained.html
*/
ptem *= 96.f / 72.f;
return ptem <= 0.f ? HB_CORETEXT_DEFAULT_FONT_SIZE : ptem;
}
static void