An image forming apparatus according to the present invention generates objects based on print data, stores the generated objects, determines whether or not a series of objects to be subjected to pseudo-transparency processing in the stored objects is subjected to an avoidance processing to deal with a shortage of the memory, which includes rendering objects to create a bitmap, encoding the bitmap for lossy compression and storing the compressed image as a new object, and controls execution of the avoidance processing on the basis of the determination result.