On Mon, Jan 10, 2011 at 06:08:01PM -0300, Francisco Balzarotti wrote:
> I'm working with a homemade afm, I'd like to export files from the
> acquisition software (that I wrote) to Gwyddion.
> I'd like to export topography and error images. No additional data.
>
> I'm not quite sure which is the most suitable -and simple- file format to
> use. Any thoughts?
If you don't mind having each channel as a separate file then GSF
http://gwyddion.net/documentation/user-guide-en/gsf.html
that was created for this purpose. It can be saved by simple code such
as
static void
save_gsf(GwyDataField *field, const gchar *filename)
{
const gchar header_template[] =
"Gwyddion Simple Field 1.0\n"
"XRes = %u\n"
"YRes = %u\n"
"XReal = %g\n"
"YReal = %g\n"
"XYUnits = m\n"
"ZUnits = m\n"
"Title = Topography\n";
const gchar padding[4] = { 0, 0, 0, 0 };
gchar *header = g_strdup_printf(header_template,
field->xres, field->yres,
field->xreal, field->yreal);
gsize len = strlen(header);
gsize npad = 4 - (len % 4);
gsize i, n = field->xres * field->yres;
gfloat *fltdata = g_new(gfloat, n);
FILE *fh = fopen(filename, "wb");
if (fh) {
for (i = 0; i < n; i++)
fltdata[i] = field->data[i];
fwrite(header, len, 1, fh);
fwrite(padding, npad, 1, fh);
fwrite(fltdata, sizeof(gfloat), n, fh);
fclose(fh);
}
else {
fprintf(stderr, "Cannot open %s: %s\n", filename, strerror(errno));
}
g_free(fltdata);
g_free(header);
}
Regards,
Yeti
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