Copying a pixbuf

["Chris Garrett" <garrett91 hotmail com>]

Hi,

I am trying to write a function to copy an area of a pixbuf (using GTK2.0).  
I realise that gdk_pixbuf_copy_area() already does the job, but once I have 
got the basic functionality working I will extend it.

However, I cannot get that basic funcionality working yet :o(
I have written it to deal with 8bpp RGB pixbufs only at the moment.

I have attached some code to this email.  In the on_darea_expose() function, 
I can call the gdk_pixbuf_copy_area() function and then 
gdk_pixbuf_render_to_drawable() to simply copy across a portion of my pixbuf 
onto the exposed part of the drawing area.

However, if I substitute my function (ikandi_pixbuf_copy_area) for 
gdk_pixbuf_copy_area, things go haywire - the image gets distorted or the 
program segfaults.

I was hoping someone could take a brief look at my code since it is driving 
me mad and I cant see what I am doing wrong.  The irritating thing is that 
it sometimes works ok (depending on the shape and size of the drawing area 
at any point in time).

The code has function calls for the two copy functions in it (one is 
commented out) so that they can be swapped between and you can see that when 
gdk_pixbuf_copy_area() is used it works fine.

I hope someone can help me with this!

Best regards,

Chris.

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