1 ! Copyright (C) 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors alien.c-types assocs cache kernel math math.vectors
4 namespaces opengl.textures pango.cairo pango.layouts ui.gadgets.worlds
5 ui.text ui.text.private pango sequences ;
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 : rendered-layout ( font string -- texture )
18 world get world-text-handle [
19 cached-layout [ image>> ] [ text-position vneg ] bi <texture>
22 M: pango-renderer draw-string ( font string -- )
23 rendered-layout draw-texture ;
25 M: pango-renderer x>offset ( x font string -- n )
26 cached-layout swap x>line-offset ;
28 M: pango-renderer offset>x ( n font string -- x )
29 cached-layout swap line-offset>x ;
31 M: pango-renderer font-metrics ( font -- metrics )
32 " " cached-layout metrics>> clone f >>width ;
34 M: pango-renderer line-metrics ( font string -- metrics )
35 [ " " line-metrics clone 0 >>width ]
36 [ cached-layout metrics>> ]
39 pango-renderer font-renderer set-global