1 ! Copyright (C) 2009, 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors assocs cache kernel math math.vectors
4 namespaces pango.cairo pango.layouts ui.text ui.text.private
8 SINGLETON: pango-renderer
10 M: pango-renderer string-dim
11 [ " " string-dim { 0 1 } v* ]
12 [ cached-layout logical-rect>> dim>> [ >integer ] map ] if-empty ;
14 M: pango-renderer flush-layout-cache
15 cached-layouts get purge-cache ;
17 M: pango-renderer string>image ( font string -- image loc )
18 cached-layout [ image>> ] [ text-position vneg ] bi ;
20 M: pango-renderer x>offset ( x font string -- n )
21 cached-layout swap x>line-offset ;
23 M: pango-renderer offset>x ( n font string -- x )
24 cached-layout swap line-offset>x ;
26 M: pango-renderer font-metrics ( font -- metrics )
27 " " cached-layout metrics>> clone f >>width ;
29 M: pango-renderer line-metrics ( font string -- metrics )
30 [ " " line-metrics clone 0 >>width ]
31 [ cached-layout metrics>> ]
34 pango-renderer font-renderer set-global