Joris,
I have added raster support only recently (last week ;)) and there was a bug
causing what you see. I have fixed it now so Cairo 1.4-7 will have the fix.
Thanks,
Simon
On Feb 15, 2011, at 9:48 AM, Joris Meys wrote:
> I was pointed to the Cairo package for plotting PNG images on a
> device. I've been playing around with it, but found that after I use
> the rasterImage function, I can't add anything any more to the device,
> eg :
>
> img <- readPNG(system.file("img", "Rlogo.png", package="png"))
> r = as.raster(img[,,1:3])
> r[img[,,4] == 0] = "white"
>
> CairoWin()
> plot(1:2,1:2,type="l")
> rasterImage(r,1,1,2,2)
> points(seq(1,2,by=0.1),seq(2,1,by=-0.1),col="black")
>
> The points are not plotted anymore.
>
> If I use the normal plotting device, I see the points plotted on top
> of the image.
>
> Cheers
> Joris
>
>
> --
> Joris Meys
> Statistical consultant
>
> Ghent University
> Faculty of Bioscience Engineering
> Department of Applied mathematics, biometrics and process control
>
> tel : +32 9 264 59 87
> joris.m...@ugent.be
> -------------------------------
> Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php
>
>
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