Dear R Community,
I'm working on an R package that needs resizing of images. I try to keep
dependencies of Tcl packages as little as possible, so I implemented the
Image Scaling procedure in C as a Tcl extension found here
http://wiki.tcl.tk/25685 .
Here a temporary download link of the slightly modified source
http://www.waddell.ch/RnavGraph/imagescale_adrian_85.c
The file works with the Tcl version 8.5. I've added the gcc compile
commands I use for Linux, OSX and Windows (minGW) at the beginning of
the file.
I'm struggling to dynamically load the extension under Windows 7. That
is i tried to use
load imgscale.dll
where under Linux and OSX I use
load ./imgscale[info sharedlibextension]
Now my Questions: does anybody know how to deal with this C extension
such that when I distribute the R-package over CRAN it will work on
every OS? This includes the question why I can not load the extension in
Windows. Is there an R package out there which uses a C extension for a
Tcl function from which I could learn how to do this?
Thanks,
Adrian
