savePlot              package:grDevices              R Documentation

Save Cairo X11 Plot to File

Description:

     Save the current page of a cairo 'X11()' device to a file.

Usage:

     savePlot(filename = paste("Rplot", type, sep="."),
              type = c("png", "jpeg", "tiff", "bmp"),
              device = dev.cur())

Arguments:

filename: filename to save to.

    type: file type: only '"png"' will be accepted for cairo version
          1.0.

  device: the device to save from.

Details:

     Only 'X11' devices of types '"cairo"' and '"nbcairo"' are
     supported.

     This works by copying the image surface to a file.  For PNG will
     always be a 24-bit per pixel PNG 'DirectClass' file, for JPEG the
     quality is 75% and for TIFF there is no compression.

     At present the plot is saved after rendering onto the canvas
     (default opaque white), so for the default 'bg = "transparent"'
     the effective background colour is the canvas colour.

Value:

     Invisible 'NULL'.

See Also:

     'X11', 'dev.copy', 'dev.print'

