1. A method of generating a representation of a page to be rendered, said page comprising one or more graphic objects, each graphic object being defined by two or more edges bounding a fill, said fill defining the colour at each pixel location within said edges, said method comprising the steps of: partitioning said page into a plurality of regions, each said region having a distinct corresponding fill sequence comprising a plurality of fills adapted to be composited to generate a colour at each pixel location within said region upon rendering; and generating said representation including a reference from each said region to a corresponding fill sequence such that at least two regions reference a common fill sequence.