Information about the graphics parameters (gc) device description (dd) and device calls

The following documentation is copied from: src/include/R_ext/GraphicsEngine.h

devinfo

Format

The devinfo object is a named list of gc, dd and device_call information.

Details

A structure containing graphical parameters

This is how graphical parameters are passed from graphics systems to the graphics engine AND from the graphics engine to graphics devices.

Devices are not *required* to honour graphical parameters (e.g., alpha transparency is going to be tough for some)

Information about the device description list (dd)

The structure is passed from C++ to the user callback function.

It can also be returned to the C++ code.

The C++ header file which defines this is: src/include/R_ext/GraphicsDevice.h