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clarify PLT_DISPLAY_BACKING_SCALE interaction with GTK+ 2/3

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Matthew Flatt 2015-08-17 06:05:58 -06:00
parent 63a62b0832
commit 6184a0d5c9
1 changed files with 7 additions and 4 deletions
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gui-doc/scribblings/gui/win-overview.scrbl
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@ -1025,9 +1025,12 @@ window has just been set. A ``point'' for font sizing is equivalent
to @racket[(/ 96 72)] drawing units. to @racket[(/ 96 72)] drawing units.
On Unix, if the @indexed-envvar{PLT_DISPLAY_BACKING_SCALE} environment On Unix, if the @indexed-envvar{PLT_DISPLAY_BACKING_SCALE} environment
variable is set to a positive real number, then it overrides any variable is set to a positive real number, then it overrides certain
system setting for @racketmodname[racket/gui] scaling. Menus, control system settings for @racketmodname[racket/gui] scaling. With GTK+ 3
labels using the default label font, and non-label control parts will (see @secref["libs"]), the environment variable overrides system-wide
not use the specified scale, however. text scaling; with GTK+ 2, the environment variable overrides both
text and control scaling. Menus, control labels using the default
label font, and non-label control parts will not use a scale specified
through @envvar{PLT_DISPLAY_BACKING_SCALE}, however.
@history[#:changed "1.14" @elem{Added support for scaling on Unix.}] @history[#:changed "1.14" @elem{Added support for scaling on Unix.}]