Caches the display of an output pane, ready for later drawing.
capi
output-pane-cache-display output-pane &optional from-display-p
output-pane⇩ |
An output-pane. |
from-display-p⇩ |
A generalized boolean. |
The function output-pane-cache-display
caches the display of the output-pane output-pane, that is what it currently shows. The result can be used later by output-pane-draw-from-cached-display.
When from-display-p is false the cached display is created by a "dummy" call to the display-callback of output-pane. If from-display-p is true the cached display is created by copying whatever is currently showing on the screen. Note that any obscured part of the pane will not be copied in this case. The default value of from-display-p is false.
Before caching the display, output-pane-cache-display
performs an implicit call to output-pane-free-cached-display, which undoes the effect of all previous Cached Display interface calls.
output-pane
output-pane-draw-from-cached-display
output-pane-free-cached-display
start-drawing-with-cached-display
12.5 Transient display on output-pane and subclasses
CAPI User Guide and Reference Manual (Unix version) - 01 Dec 2021 19:32:42