wrap_plot() overrides ggsave() "bg" argument

[picasa]

Hi, not sure if i should post in patchwork or ggsave repository, but i noticed that the bg argument from ggsave was not functioning as expected with a plot constructed by patchwork: in the below example, the file "test_ok.jpg" has the expected background color, while "test_nok.jpg" has default background. Is it a normal behaviour for patchwork plots ?

Thanks !

library(ggplot2)
library(patchwork)

p1 <- ggplot(data = cars) + geom_point(aes(x=speed, y=dist)) + theme_void()

p2 <- wrap_plots(p1)

ggsave(p1, file = "test_ok.jpg", width = 1, height = 1, bg = "#124270")
ggsave(p2, file = "test_nok.jpg", width = 1, height = 1, bg = "#124270")

^{Created on 2022-02-11 by the reprex package (v2.0.1)}

[thomasp85]

This is because a patchwork has its own distinct theme and background as well (which defaults to "white"). You can override this using either plot_annotation(theme = ...) or by applying a theme with the & operator which will set the theme of all included plots as well as the full patchwork

p3 <- p2 & theme_void()

ggsave(p3, file = "test_hopefully_ok.jpg", width = 1, height = 1, bg = "#124270")