[Fontconfig] Font weights?

[Dave Pawson]

W3c css has
http://www.w3.org/TR/css3-fonts/#font-weight-prop

100 - Thin
200 - Extra Light (Ultra Light)
300 - Light
400 - Normal
500 - Medium
600 - Semi Bold (Demi Bold)
700 - Bold
800 - Extra Bold (Ultra Bold)
900 - Black (Heavy)

fontconfig has

#define FC_WEIGHT_THIN		    0
#define FC_WEIGHT_EXTRALIGHT	    40
#define FC_WEIGHT_ULTRALIGHT	    FC_WEIGHT_EXTRALIGHT
#define FC_WEIGHT_LIGHT		    50
#define FC_WEIGHT_BOOK		    75
#define FC_WEIGHT_REGULAR	    80
#define FC_WEIGHT_NORMAL	    FC_WEIGHT_REGULAR
#define FC_WEIGHT_MEDIUM	    100
#define FC_WEIGHT_DEMIBOLD	    180
#define FC_WEIGHT_SEMIBOLD	    FC_WEIGHT_DEMIBOLD
#define FC_WEIGHT_BOLD		    200
#define FC_WEIGHT_EXTRABOLD	    205
#define FC_WEIGHT_ULTRABOLD	    FC_WEIGHT_EXTRABOLD
#define FC_WEIGHT_BLACK		    210
#define FC_WEIGHT_HEAVY		    FC_WEIGHT_BLACK
#define FC_WEIGHT_EXTRABLACK	    215
#define FC_WEIGHT_ULTRABLACK	    FC_WEIGHT_EXTRABLACK

Is there any clear relationship between them please?


TIA



-- 
Dave Pawson
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http://www.dpawson.co.uk