R Under development (unstable) (2025-07-22 r88445 ucrt) -- "Unsuffered Consequences"
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> # Try to reproduce testsvg.R from grid
> library(grid)
> library(gridSVG)

Attaching package: 'gridSVG'

The following objects are masked from 'package:grid':

    linearGradient, pattern, radialGradient

The following object is masked from 'package:grDevices':

    dev.off

> 
> dev.new(width=6, height=6)
dev.new(): using pdf(file="Rplots4.pdf")
> # Force white background and black foreground
> pushViewport(viewport(gp=gpar(col="black", fill="white")))
> grid.rect()
> # NOTE: that svg.R has transforms that assume that (0, 0)
> # is at bottom-left so y-locations and heights in "native"
> # coordinates on an X11 device are not
> # handled properly (by svg.R;  grid draws them fine).
> # So for the outer viewport, we fudge an approximation to the
> # "pixel" locations in testsvg.R
> # Ultimate fix requires something in svg.R transforms (ty and th)
> # Also, the viewport pushed above means that the "native"
> # device coordinates are no longer available here
> pushViewport(viewport(unit(1, "mm"), unit(1, "mm"),
+                        unit(0.5, "npc"), unit(0.6, "npc"),
+                        just=c("left", "bottom"),
+                        xscale=c(0, 11), yscale=c(0, 11)))
> grid.rect(gp=gpar(col="green"))
> grid.lines(1:10, 10:1,
+            default.units="native",
+            gp=gpar(col="green"))
> grid.polygon(c(1, 3, 4, 1), c(1, 1, 5, 4),
+            default.units="native",
+            gp=gpar(fill="grey", col=NA))
> grid.rect(rep(6, 2), c(3, 7), 2, 1,
+           just=c("left", "bottom"),
+           default.units="native",
+           gp=gpar(fill="cyan"))
> grid.text(c("some text", "some more text!"), 2, 8:7,
+           just="left",
+           default.units="native")
> grid.circle(rep(8, 2), 3, c(.1, 2),
+             default.units="native",
+             gp=gpar(col="blue", fill=NA))
> grid.text("centred text", 4, 5,
+           default.units="native", rot=20)
>   pushViewport(viewport(x=6, y=5, w=3, h=1,
+                          default.units="native",
+                          just=c("left", "bottom"),
+                          xscale=c(0, 1), yscale=c(0, 1)))
>   grid.rect(0, 0, 1, 1,
+             just=c("left", "bottom"),
+             default.units="native",
+             gp=gpar(fill=NA, col="black"))
>   grid.text("text in a box", 0.1, 0.5,
+             just=c("left", "bottom"),
+             default.units="native")
>   popViewport()
> grid.rect(5, 2, 2, 7,
+           default.units="native",
+           just=c("left", "bottom"),
+           gp=gpar(fill="green", alpha=.5))
> popViewport()
> 
> popViewport()
> 
> grid.export("grid.svg")
> dev.off()
null device 
          1 
> 
> proc.time()
   user  system elapsed 
   0.73    0.07    0.79