Thread: Pointer to integer without a cast

I'm trying to a get a pointer to my raster pixel data here, in cairo. But the problem is more of a broader c one. I hope Laser is around, she'll know this one. The second line of code is throwing a 'initialization makes pointer from integer without a cast'

Code:

cairo_rectangle_int_t *rect = &(cairo_rectangle_int_t){100, 100, 1, 1}; // COMPILES FINE
cairo_surface_t *image=cairo_surface_map_to_image(surface , rect); // THIS BARFS

I tried passing &rect into the initializer, that didn't work. Any ideas. Thanks. - Javaeyes

If I could find the API I'd be in a lot better shape, but I cannot find the API, I think it's so new that the devs may not have released it. I am posting also on the #cairo IRC channel and the devs do their best to answer me, but they are very busy, as are you. The type of surface is: cairo_surface_t *surface. So it's a pointer to a cairo_surface_t, which I am pretty sure is what the function initializer expects. I am assuming it returns another surface. Basically I'm passing in a surface, and then coordinates for a rectangle within that surface and returning a smaller surface -- which will then give me access to the raw raster pixel data. I'll keep searching for the API but when I google the function name only a couple pages show up and it is mostly devs discussing how the API should work.

Ahhhhhhhhhhhhh! Let me parse through the headers. Thanks Laser! I also directly asked the devs if there is an API somewhere where google hasn't indexed yet.

Hmm. Cairo has only 1 included header. I searched for the function name and nothing came up. The header also includes three other headers, and I searched them, but there's nothing there. Now I'm officially at a temporary dead end. Can you see any trails to follow Laser?

Did you include cairo.h ?

Yes I included cairo.h, also searched for the string literal "cairo_surface_map_to_image" within cairo.h, nothing shows up. I also parsed the file manually, by eye, and I cannot find it. Maybe it's just not there?

If a function isn't in a header file, you aren't going to be able to use it are you?