cairoWriteFunc: CairoWriteFunc
In RGtk2: R Bindings for Gtk 2.8.0 and Above

Description Signature Author(s) References

A callback used by cairo for outputting graphics data in formats like svg and png.

CairoWriteFunc(data, length, user_data): The type of function which is called when a backend needs to write data to an output stream. It is passed the closure which was specified by the user at the time the write function was registered, the data to write and the length of the data in bytes. The write function should return CAIRO_STATUS_SUCCESS if all the data was successfully written, CAIRO_STATUS_WRITE_ERROR otherwise.

data: [raw] the buffer containing the data to write
length: [numeric] the amount of data to write
user_data: [R object] user-supplied data

Michael Lawrence

http://www.cairographics.org/manual/cairo-PNG-Support.html

RGtk2 documentation built on Oct. 14, 2021, 5:08 p.m.