having trouble with gtk2-perl and cairo

[haricharan]

i am trying to convert a gtk script from C to perl. I converted most of it except this line
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
I found its python equivalent in pygtk to be
cr.set_operator(cairo.OPERATOR_SOURCE)
But i want it in perl. Can someone please tell how this line translates to perl. I checked the gtk2-perl documentation. Its not listed there....

[haricharan]

bump....

[haricharan]

no suggestions?????? :( :( :confused:

[slavik]

why not simply keep it?

check on the details about embedding C code inside Perl code ...

[Snargle]

I'm not familiar with operators, but there's a couple operator functions shown here:

http://cpan.uwinnipeg.ca/htdocs/Cairo/Cairo.html#cr_gt_set_operator_op

It looks like it takes arguments such as 'over', 'atop', 'in', etc.

A C function wouldn't be easy because it can't be passed $cr, which is a perl hash reference instead of a c struct pointer.

[haricharan]

why not simply keep it?

check on the details about embedding C code inside Perl code ...

i cant keep it as it.....my whole application is in perl....i wanted to embed windows with alpha masks for it....and important thing i dont know much of python.....i can try in C though..and also lemme try the embedding stuff...thank you anyway... :)

[haricharan]

I'm not familiar with operators, but there's a couple operator functions shown here:

http://cpan.uwinnipeg.ca/htdocs/Cairo/Cairo.html#cr_gt_set_operator_op

It looks like it takes arguments such as 'over', 'atop', 'in', etc.

A C function wouldn't be easy because it can't be passed $cr, which is a perl hash reference instead of a c struct pointer.

thanks for the link..but it doesnt give abt operator in much detail.....lemme try searching more!!

[Snargle]

This works:
$cr->set_operator ('source');

I'm sure it's equivalent to "cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);"

[haricharan]

This works:
$cr->set_operator ('source');

I'm sure it's equivalent to "cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);"

Thanks a lot it works....i had been trying all kinds of possibilities....but it didnt strike for me to use just 'source'...