1 ! Copyright (C) 2009 Slava Pestov.
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2 ! See http://factorcode.org/license.txt for BSD license.
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3 USING: accessors assocs cache kernel math math.vectors sequences fonts
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4 namespaces opengl.textures ui.text ui.text.private ui.gadgets.worlds
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6 IN: ui.text.uniscribe
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8 SINGLETON: uniscribe-renderer
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10 M: uniscribe-renderer string-dim
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11 [ " " string-dim { 0 1 } v* ]
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12 [ cached-script-string size>> ] if-empty ;
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14 M: uniscribe-renderer flush-layout-cache
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15 cached-script-strings get purge-cache ;
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17 : rendered-script-string ( font string -- texture )
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18 world get world-text-handle
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19 [ cached-script-string [ image>> { 0 0 } ] [ size>> ] bi <texture> ]
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22 M: uniscribe-renderer draw-string ( font string -- )
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23 dup dup selection? [ string>> ] when empty?
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24 [ 2drop ] [ rendered-script-string draw-texture ] if ;
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26 M: uniscribe-renderer x>offset ( x font string -- n )
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28 cached-script-string x>line-offset 0 = [ 1+ ] unless
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31 M: uniscribe-renderer offset>x ( n font string -- x )
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32 [ 2drop 0 ] [ cached-script-string line-offset>x ] if-empty ;
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34 M: uniscribe-renderer font-metrics ( font -- metrics )
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35 " " cached-script-string metrics>> clone f >>width ;
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37 M: uniscribe-renderer line-metrics ( font string -- metrics )
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38 [ " " line-metrics clone 0 >>width ]
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39 [ cached-script-string metrics>> 50 >>width 10 >>cap-height 10 >>x-height ]
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42 uniscribe-renderer font-renderer set-global
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