Inkjet printing apparatus and storage medium storing program

A non-transitory computer-readable storage medium storing a set of program instructions for a computer of an electronic device that controls an inkjet printing apparatus, the inkjet printing apparatus including a print engine including a head having a plurality of nozzles configured to eject ink, the print engine being configured to print an image on a recording medium by ejecting ink from the plurality of nozzles while the head moves relative to the recording medium, the set of program instructions, when executed by the computer, causing the electronic device to:

• extract an image resolution in a first direction of image data stored in a memory of the electronic device;
• determine, based on the image data, whether a code image is included in an image to be printed on the recording medium, the code image being formed with a plurality of print regions and a plurality of non-print regions;
• in response to determining that the code image is included, determine whether a print resolution in the first direction stored in the memory is lower than the extracted image resolution in the first direction;
• in response to determining that the print resolution is lower than the extracted image resolution, update the print resolution in the first direction with a value equal to or higher than the extracted image resolution in the first direction;
• and
• control the print engine to print the image on the recording medium with the updated print resolution in the first direction.