1 ! Copyright (C) 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: assocs accessors alien core-graphics.types core-text
4 core-text.fonts kernel hashtables namespaces sequences
5 ui.gadgets.worlds ui.text ui.text.private opengl opengl.gl
6 opengl.textures destructors combinators core-foundation
7 core-foundation.strings math math.vectors init colors colors.constants
11 SINGLETON: core-text-renderer
13 M: core-text-renderer init-text-rendering
14 <cache-assoc> >>text-handle drop ;
16 M: core-text-renderer string-dim
17 [ " " string-dim { 0 1 } v* ]
21 M: core-text-renderer flush-layout-cache
22 cached-lines get purge-cache ;
24 : rendered-line ( font string -- texture )
25 world get world-text-handle
26 [ cached-line [ image>> ] [ loc>> ] bi <texture> ]
29 M: core-text-renderer draw-string ( font string -- )
30 rendered-line draw-texture ;
32 M: core-text-renderer x>offset ( x font string -- n )
35 swap 0 <CGPoint> CTLineGetStringIndexForPosition
38 M: core-text-renderer offset>x ( n font string -- x )
39 cached-line line>> swap f
40 CTLineGetOffsetForStringIndex ;
42 M: core-text-renderer font-metrics ( font -- metrics )
45 M: core-text-renderer line-metrics ( font string -- metrics )
46 [ " " line-metrics clone 0 >>width ]
47 [ cached-line metrics>> ]
50 core-text-renderer font-renderer set-global