An image forming device includes a layouter for generating layout data for a document file; a renderer for generating rendering data for the document file; a data control section connected to the layouter and the renderer; and a print section. The data control section includes a detector for detecting location information on image data when the data control section receives a request for dimensions information on the image data from the layouter and when the data control section receives a request for the image data from the renderer; an acquirer for acquiring the requested image data and the dimensions information on the image data on the basis of the location information detected by the detector; and an output controller for controlling so that the document file is output to the layouter and the image data and the dimensions information on the image data acquired by the acquirer are outputted to the renderer and the layouter, respectively.