Query Capabilities of the Current Graphics Device
Query the capabilities of the current graphics device.
dev.capabilities(what = NULL)
- a character vector partially matching the names of the
components listed in section
NULLwhich lists all available capabilities.
The capabilities have to be specified by the author of the graphics
device, unless they can be deduced from missing hooks. Thus they will
often by returned as
NA, and may reflect the maximal
capabilities of the underlying device where several output formats are
supported by one device.
Most recent devices support semi-transparent colours provided the graphics format does (which PostScript does not). On the other hand, relatively few graphics formats support (fully or semi-) transparent backgrounds: generally the latter is found only in PDF and PNG plots.
- A named list with some or all of the following components, any of which may
semiTransparency logical: Does the device support semi-transparent colours? transparentBackground character: Does the device support (semi)-transparent backgrounds? Possible values are
"fully"(only full transparency) and
"semi"(semi-transparent background colours are supported).
rasterImage character: To what extent does the device support raster images as used by
grid.raster? Possible values
"non-missing"(support only for arrays without any missing values).
capture logical: Does the current device support raster capture as used by
locator logical: Does the current device support
events character: Which events can be generated on this device? Currently this will be a subset of
c("MouseDown", "MouseMove", "MouseUp", "Keybd"), but other events may be supported in the future.
getGraphicsEvent for details on interactive events.