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 string-dim
14 [ " " string-dim { 0 1 } v* ]
18 M: core-text-renderer flush-layout-cache
19 cached-lines get purge-cache ;
21 : rendered-line ( font string -- texture )
22 world get world-text-handle [
24 [ image>> ] [ loc>> ] [ image>> dim>> ] tri
28 M: core-text-renderer draw-string ( font string -- )
29 rendered-line draw-texture ;
31 M: core-text-renderer x>offset ( x font string -- n )
34 swap 0 <CGPoint> CTLineGetStringIndexForPosition
37 M: core-text-renderer offset>x ( n font string -- x )
38 cached-line line>> swap f
39 CTLineGetOffsetForStringIndex ;
41 M: core-text-renderer font-metrics ( font -- metrics )
44 M: core-text-renderer line-metrics ( font string -- metrics )
45 [ " " line-metrics clone 0 >>width ]
46 [ cached-line metrics>> ]
49 core-text-renderer font-renderer set-global