An image processing apparatus uses a first rendering processor that performs rendering of a first area within a page based on print data and a second rendering processor that performs rendering of a second area within the page based on the print data. The image processing apparatus includes a controller, having a processor which executes instructions stored in a memory or having circuitry, being configured to acquire image data arranged across the first area and the second area based on the print data, cause the first rendering processor having accessed the image data to acquire all pixels of the image data and to perform rendering with pixels within the first area of all the pixels of the image data, and cause the second rendering processor having accessed the image data to acquire all the pixels of the image data and to perform rendering with pixels within the second area of all the pixels of the image data.