R: Save Cairo X11 Plot to File

savePlot {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 cairo-based `X11` devices 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.

For devices with buffering this copies the buffer's image surface, so works even if `dev.hold` has been called.

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`.

### Note

There is a similar function of the same name but more types for `windows` devices on Windows.

### See Also

`X11`, `dev.copy`, `dev.print`

[Package grDevices version 3.1.2 Index]