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ui.text.pango: lazy render images like core-text backend.

db4
John Benediktsson 2012-09-21 08:16:13 -07:00
parent fc7f7a736a
commit 07194b4741
1 changed files with 4 additions and 2 deletions
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basis/ui/text/pango/pango.factor
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@ -163,7 +163,6 @@ MEMO: missing-font-metrics ( font -- metrics )
dup [ string>> ] [ font>> ] bi <PangoLayout> >>layout
dup layout>> layout-extents [ >>ink-rect ] [ >>logical-rect ] bi*
dup layout-metrics >>metrics
dup draw-layout >>image
] with-destructors ;
M: layout dispose* layout>> g_object_unref ;
@ -176,6 +175,9 @@ SYMBOL: cached-layouts
: cached-line ( font string -- line )
cached-layout layout>> first-line ;
: layout>image ( layout -- image )
dup image>> [ dup draw-layout >>image ] unless image>> ;
SINGLETON: pango-renderer
M: pango-renderer string-dim
@ -186,7 +188,7 @@ M: pango-renderer flush-layout-cache
cached-layouts get purge-cache ;
M: pango-renderer string>image ( font string -- image loc )
cached-layout [ image>> ] [ text-position vneg ] bi ;
cached-layout [ layout>image ] [ text-position vneg ] bi ;
M: pango-renderer x>offset ( x font string -- n )
cached-layout swap x>line-offset ;