[XForms] Pixmap wrangling

[jon]

I am trying to make multiple variations of a single image by copying
then modifying a single included pixmap. So far I am failing.

PMSIZE is about 10 times larger than the actual data (for testing)


// Include a pixmap
#include "rgbbar.xpm"


// Later in code
char *pp;
char **ppp;

pp = (char*)calloc(1,PMSIZE);
memcpy (pp, *rgbbar_xpm, PMSIZE);

printf("Pointer created pp=  %p\n",pp);
printf("[%s]\n\n",pp);

ppp=&pp;
fl_set_pixmap_data(obj, ppp );




Output of above:
Pointer created pp=  0x55f95930e780
[237 38 22 1]

In fl_create_from_pixmapdata() [pixmap.c:521]: error converting:
(Invalid file)


Can anyone suggest what I am doing wrong ? The pixmap data itself is
valid as using fl_set_pixmap_file() works fine.

Thanks.
Jon