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Simplify check_device() for {ragg}/{svglite} #5476

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Oct 30, 2023
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4 changes: 2 additions & 2 deletions DESCRIPTION
Original file line number Diff line number Diff line change
Expand Up @@ -59,12 +59,12 @@ Suggests:
nlme,
profvis,
quantreg,
ragg,
ragg (>= 1.2.6),
RColorBrewer,
rmarkdown,
rpart,
sf (>= 0.7-3),
svglite (>= 1.2.0.9001),
svglite (>= 2.1.2),
testthat (>= 3.1.2),
vdiffr (>= 1.0.6),
xml2
Expand Down
71 changes: 16 additions & 55 deletions R/utilities-checks.R
Original file line number Diff line number Diff line change
Expand Up @@ -247,6 +247,20 @@ check_device = function(feature, action = "warn", op = NULL, maybe = FALSE,
dev_name <- names(dev_cur)
}

# {ragg} and {svglite} report capabilities, but need specific version
if (dev_name %in% c("agg_jpeg", "agg_ppm", "agg_png", "agg_tiff")) {
check_installed(
"ragg", version = "1.2.6",
reason = paste0("for checking device support for ", feat_name, ".")
)
}
if (dev_name == "devSVG") {
check_installed(
"svglite", version = "2.1.2",
reason = paste0("for checking device support for ", feat_name, ".")
)
}

# For blending/compositing, maybe test a specific operation
if (!is.null(op) && feature %in% c("blending", "compositing")) {
op <- arg_match0(op, c(.blend_ops, .compo_ops))
Expand Down Expand Up @@ -305,34 +319,8 @@ check_device = function(feature, action = "warn", op = NULL, maybe = FALSE,
}
}

# Test {ragg}'s capabilities
if (dev_name %in% c("agg_jpeg", "agg_ppm", "agg_png", "agg_tiff")) {
# We return ragg's version number if not installed, so we can suggest to
# install it.
capable <- switch(
feature,
clippingPaths =, alpha_masks =, gradients =,
patterns = if (is_installed("ragg", version = "1.2.0")) TRUE else "1.2.0",
FALSE
)
if (isTRUE(capable)) {
return(TRUE)
}
if (is.character(capable) && action != "test") {
check_installed(
"ragg", version = capable,
reason = paste0("for graphics support of ", feat_name, ".")
)
}
action_fun(paste0(
"The {.pkg ragg} package's {.field {dev_name}} device does not support ",
"{.emph {feat_name}}."
), call = call)
return(FALSE)
}

# The vdiffr version of the SVG device is known to not support any newer
# features
# If vdiffr has neither confirmed nor denied its capabilities, the feature
# is assumed to be not supported.
if (dev_name == "devSVG_vdiffr") {
action_fun(
"The {.pkg vdiffr} package's device does not support {.emph {feat_name}}.",
Expand All @@ -341,33 +329,6 @@ check_device = function(feature, action = "warn", op = NULL, maybe = FALSE,
return(FALSE)
}

# The same logic applies to {svglite} but is tested separately in case
# {ragg} and {svglite} diverge at some point.
if (dev_name == "devSVG") {
# We'll return a version number if not installed so we can suggest it
capable <- switch(
feature,
clippingPaths =, gradients =, alpha_masks =,
patterns = if (is_installed("svglite", version = "2.1.0")) TRUE else "2.1.0",
FALSE
)

if (isTRUE(capable)) {
return(TRUE)
}
if (is.character(capable) && action != "test") {
check_installed(
"svglite", version = capable,
reason = paste0("for graphics support of ", feat_name, ".")
)
}
action_fun(paste0(
"The {.pkg {pkg}} package's {.field {dev_name}} device does not ",
"support {.emph {feat_name}}."), call = call
)
return(FALSE)
}

# Last resort: list of known support prior to R 4.2.0
supported <- c("pdf", "cairo_pdf", "cairo_ps", "svg")
if (feature == "compositing") {
Expand Down
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