Creates a new gdk.Pixbuf structure and allocates a buffer for it. The buffer has an optimal rowstride. Note that the buffer is not cleared; you will have to fill it completely yourself.
Color space for image
Whether the image should have transparency information
Number of bits per color sample
Width of image in pixels, must be > 0
Height of image in pixels, must be > 0
A newly-created gdk.Pixbuf with a reference count of 1, or NULL if not enough memory could be allocated for the image buffer.
ConstructionException GTK+ fails to create the object.