Where plural rectangle drawing objects are provided in an overlapping manner in plural layers each having a different density, an intermediate code producing unit produces plural divisional objects upon dividing a region into prescribed pixel region units at each layer. The divisional object of a lower layer is set as a lower divisional object whereas the divisional object of a layer upper than the lower divisional object is set as an upper divisional object. The invented apparatus omits production of the intermediate code of the lower divisional object completely hiding under the upper divisional object and performs production of the intermediate code of the lower divisional object having a region protruding from the upper divisional object, at each of the prescribed pixel regions from the bottommost layer to the topmost layer.