Patent ID: 8498011

Claim:
An image forming apparatus comprising: an input unit configured to input image data; a rendering unit configured to perform rendering on the image data input by the input unit; an image forming unit configured to perform image forming based on image data on which the rendering is performed by the rendering unit; and a control unit configured to, when the input unit inputs image data of a second job while the image forming unit is performing image forming based on image data of a first job preceding to the second job, (i) control the rendering unit to perform rendering on the image data of the second job in low-speed different from zero and control the image forming unit to perform image forming based on the image data of the first job in high-speed, in a case that the rendering unit has completed rendering on the image data of the first job, and (ii) control the rendering unit to perform rendering on the image data of the first job in high-speed and control the image forming unit to perform image forming based on the image data of the first job in low-speed different from zero, in case that the rendering unit has not completed rendering on the image data of the first job.