I've never used Gtk2::Gdk::Pixbuf myself, so this is just speculation...
What might be a problem is that binary data may normally contain \0, which terminates a regular C char* string (as opposed to Perl strings, which may contain \0 without problems). In other words, if you cast the binary blob to char*, you're (likely) cutting off any data after the first \0... (which would explain why it works in some cases)

There are Perl API functions that allow you to specifiy the number of bytes to be copied into a scalar (e.g. sv_setpvn(), see perlapi), but I have no idea how to tell Inline::C to do custom conversions... So, what I would try is to convert the data to a scalar (SV*) myself on the C side, and then specify that as the return type of GetImage().  Also, you'd have to figure out where to get the proper length from... (header?)

In reply to Re^4: Open CV problem by Anonyrnous Monk
in thread Open CV problem by russellp

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