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Improve OpenType to Fontconfig weight mapping

This commit is contained in:
Behdad Esfahbod 2016-03-08 17:20:28 -08:00
parent 27d61f1ddc
commit d709220d74
1 changed files with 19 additions and 6 deletions
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25
src/fcweight.c
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@ -54,14 +54,27 @@ FcWeightFromOpenType (int ot_weight)
{
int i;
/* Follow WPF Font Selection Model's advice. */
if (1 <= ot_weight && ot_weight <= 9)
ot_weight *= 100;
/* Loosely based on WPF Font Selection Model's advice. */
/* WPF Font Selection Model rejects 1000, we allow it
* because Pango uses that number. */
if (ot_weight < 1 || ot_weight > 1000)
if (ot_weight < 0)
return -1;
else if (1 <= ot_weight && ot_weight <= 9)
{
/* WPF Font Selection Model says do "ot_weight *= 100",
* but Greg Hitchcock revealed that GDI had a mapping
* reflected below: */
switch (ot_weight) {
case 1: ot_weight = 80; break;
case 2: ot_weight = 160; break;
case 3: ot_weight = 240; break;
case 4: ot_weight = 320; break;
case 5: ot_weight = 400; break;
case 6: ot_weight = 550; break;
case 7: ot_weight = 700; break;
case 8: ot_weight = 800; break;
case 9: ot_weight = 900; break;
}
}
for (i = 1; ot_weight > map[i].ot; i++)
;