R Under development (unstable) (2025-12-16 r89184 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> message("*** devDump() ...")
*** devDump() ...
> 
> library("R.devices")
R.devices v2.17.3 successfully loaded. See ?R.devices for help.
> graphics.off()
> 
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Copy content of current screen device
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> if (interactive()) {
+   # Open device
+   plot(1:10)
+ 
+   devList0 <- devList()
+   devEval("png,jpg,pdf", name="count", tags="copy")
+   stopifnot(all.equal(devList(), devList0))
+ 
+   # Sanity checks
+   print(devList())
+   stopifnot(length(devList()) == 1L)
+ 
+ 
+   # Same using a default name
+   devList0 <- devList()
+   devEval("png,jpg,pdf")
+   stopifnot(all.equal(devList(), devList0))
+   stopifnot(length(devList()) == 1L)
+ 
+   # Close device
+   devOff()
+ 
+   stopifnot(length(devList()) == 0L)
+ 
+ 
+   # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+   # Copy content of all screen devices
+   # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+   # Open several devices
+   idxs <- NULL
+ 
+   idxs <- c(idxs, devNew())
+   plot(1:10)
+ 
+   idxs <- c(idxs, devNew())
+   plot(cos)
+ 
+   # Automatially "dump" image files of all open devices
+   devDump()
+ 
+   # "Manual" saving of defined
+   which <- devList()
+   print(which)
+ 
+   # Save all
+   devEval("png,pdf", which=which)
+ 
+   # Close all opened devices
+   devOff(idxs)
+ } # if (interactive())
> 
> 
> message("*** devDump() ... DONE")
*** devDump() ... DONE
> 
> proc.time()
   user  system elapsed 
   0.40    0.10    0.48