Get a list of available renderers.
This function will only work after starting a device with hgd().
Usage
hgd_renderers(which = dev.cur())
Value
List of renderers with the following named items:
$id: Renderer ID,
$mime: File mime type,
$ext: File extension,
$name: Human readable name,
$type: Renderer type (currently either plot or other),
$bin: Is the file a binary blob or text.