Arguments are two grobs clippee and clipper plus use_R41_clipping, image res, and the normal grob arguments like name...
Use getOption("ggpattern.use_R41_clipping")) as default for use_R41_clipping
If isTRUE(use_R41_clipping) then use the new R 4.1 clip = grob within a viewport functionality otherwise convert both clippee and clipper to identically dimensioned rasters with help of res and then calculate and return an appropriately clipped rasterGrob
Uses:
No longer any need for pattern authors to manually clip pattern boundaries when creating new patterns (although there may be a performance hit versus explicitly clipping with tools like {sf}) which may be particularly hard for certain desired patterns like #40
Can take any existing patternGrob and provide support for "holes"
New 'clipGrob()' function:
clippeeandclipperplususe_R41_clipping, imageres, and the normal grob arguments likename...getOption("ggpattern.use_R41_clipping"))as default foruse_R41_clippingisTRUE(use_R41_clipping)then use the new R 4.1clip = grobwithin a viewport functionality otherwise convert bothclippeeandclipperto identically dimensioned rasters with help ofresand then calculate and return an appropriately clippedrasterGrobUses:
{sf}) which may be particularly hard for certain desired patterns like #40