Data processing apparatus, data processing method, and storage medium

A data processing apparatus comprising:

• a processor;
• and
• a memory storing instructions that, when executed by the processor, cause the processor to perform operations comprising:
• reading out data of a first area of image data to be subjected to image processing from an external memory, sequentially interpreting a plurality of commands included in a command list obtained from the external memory, and transmitting the data of the first area to an image processing circuit according to the command;
• and
• receiving data obtained by performing the image processing on the data of the first area from the image processing circuit and writing the received data in the external memory according to the command,
• wherein, based on a control signal indicating that data of a second area following to the data of the first area can be read out from the external memory,
• reading out data comprises controlling readout of a following command to a command indicating suspension from the external memory and continuation, suspension, or restart of transmission of the data of the second area, and
• based on a control signal indicating that the data of the second area following to the data of the first area can be read out from the external memory,
• receiving data comprises controlling, in a case that the command indicating suspension is received, continuation, suspension, or restart of writing of the data of the second area to the external memory.