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.texture-cache 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 core-text-renderer <texture-cache> >>text-handle drop ;
16 M: core-text-renderer string-dim
17 [ " " string-dim { 0 1 } v* ] [ cached-line dim>> ] if-empty ;
19 M: core-text-renderer render-texture
20 drop first2 cached-line
21 [ dim>> ] [ bitmap>> ] bi
22 GL_BGRA_EXT GL_UNSIGNED_INT_8_8_8_8_REV
25 M: core-text-renderer finish-text-rendering
26 text-handle>> purge-texture-cache
27 cached-lines get purge-cache ;
29 : rendered-line ( font string -- texture )
30 2array world get text-handle>> get-texture ;
32 M: core-text-renderer draw-string ( font string -- )
33 rendered-line display-list>> glCallList ;
35 M: core-text-renderer x>offset ( x font string -- n )
38 swap 0 <CGPoint> CTLineGetStringIndexForPosition
41 M: core-text-renderer offset>x ( n font string -- x )
42 cached-line line>> swap f
43 CTLineGetOffsetForStringIndex ;
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