core-text-renderer

Vocabulary

ui.text.core-text

Definition

IN: ui.text.core-text

SINGLETON: core-text-renderer

Methods

USING: cache core-text namespaces ui.text.core-text
ui.text.private ;

M: core-text-renderer flush-layout-cache
    cached-lines get-global purge-cache ;


USING: core-text.fonts ui.text ui.text.core-text ;

M: core-text-renderer font-metrics cache-font-metrics ;


USING: accessors core-text kernel sequences ui.text
ui.text.core-text ui.text.core-text.private ;

M: core-text-renderer line-metrics
    [ " " line-metrics clone 0 >>width ]
    [ cached-line metrics>> scale-metrics ] if-empty ;


USING: accessors core-text io.encodings.string
io.encodings.utf16 math opengl sequences ui.text
ui.text.core-text ;

M:: core-text-renderer offset>x ( n font string -- x )
    font string cached-line line>> 0 n string subseq
    utf16n encode length 2 /i f CTLineGetOffsetForStringIndex
    gl-unscale ;


USING: accessors core-text math.vectors sequences
ui.text.core-text ui.text.core-text.private ui.text.private ;

M: core-text-renderer string-dim
    [ " " string-dim { 0 1 } v* ]
    [ cached-line dim>> scale-dim ] if-empty ;


USING: accessors core-text kernel ui.text ui.text.core-text
ui.text.core-text.private ;

M: core-text-renderer string>image
    cached-line [ line>image ] [ loc>> scale-dim ] bi ;


USING: accessors core-graphics.types core-text
io.encodings.string io.encodings.utf16 kernel math opengl
sequences ui.text ui.text.core-text ;

M:: core-text-renderer x>offset ( x font string -- n )
    x font string
    [ 2drop 0 ] [
        cached-line line>> swap gl-scale 0 <CGPoint>
        CTLineGetStringIndexForPosition 2 *
        0 swap string utf16n encode subseq utf16n decode length
    ] if-empty ;