To prepare a page for display or printing. Rasterization is performed by a raster image processor (RIP), which turns text and images into the matrix of pixels (bitmap) that will be displayed on screen or printed on the page. Various conversions may take place. For example, the mathematical coordinates of vector and outline fonts as well as vector drawings must be converted into bitmaps. Existing bitmaps may have to be scaled into different-sized bitmaps.