Printing device performing resource monitoring process to increase amount of available space of memory

A printing device comprising:

• a memory;
• a printing mechanism;
• and
• a computer,
• wherein the computer is configured to perform:
• an acquiring process to acquire an image file having a plurality of objects, the image file defining a plurality of pages;
• a raster data creating process to analyze the acquired image file and create raster data based on the image file by using a result of analyzing, the raster data including a plurality of sets of raster data for respective ones of the plurality of pages;
• and
• a printing process to print a plurality of images for respective ones of the plurality of pages based on the created raster data,
• wherein in the raster data creating process, the computer is configured to perform:
• selecting a target object from the plurality of objects in the image file;
• an object process based on the selected target object in which a selected one of a first process and a second process is performed;
• and
• a drawing process to create the raster data,
• wherein the first process is performed when the target object includes data on a reference to another object, the first process being to store, in the memory, data as a set of extraction data having a reference to the other data to be used to create the raster data by analyzing and at least partially extracting data from the target object,
• wherein the second process is performed when the target object includes content data, the second process being to create a set of intermediate data based on the target object, and to store the created set of intermediate data in the memory,
• wherein each time a new target object is selected, the object process is performed on the new target object, and a corresponding one of a set of extraction data and a set of intermediate data is stored in the memory,
• wherein executing the drawing process on one or more created sets of intermediate data creates the raster data,
• wherein the computer is configured to further perform:
• a resource monitoring process, when the memory is in a prescribed state during the raster data creating process, the resource monitoring process being to increase an amount of available space of the memory by deleting one or more sets of extraction data,
• each having a reference to other data, from the memory,
• the prescribed state being a state satisfying that the amount of available space of the memory is smaller than a previous amount of available space of the memory before the raster data creating process is performed and satisfying a prescribed condition,
• wherein the raster data creating process is performed on a page-to-page basis to create the plurality of sets of raster data for respective ones of the plurality of pages,
• wherein the raster data creating process performs:
• analyzing one or more objects for one page, and creating a set of raster data used for printing the one page after all of one or more sets of intermediate data for the one page are stored in the memory, and
• subsequent to the creating the set of raster data used for printing the one page, deleting all of the one or more sets of intermediate data for the one page from the memory while maintaining one or more sets of extraction data in the memory,
• wherein the computer is configured to further perform:
• an intermediate flush process when the amount of available space of the memory is smaller than a prescribed determination amount and before storing all of the one or more sets of intermediate data required for creating the set of raster data for the one page in the memory is complete, the intermediate flush process performing
• creating a set of intermediate raster data based on two or more sets of intermediate data for the one page;
• and
• deleting from the memory all the two or more sets of intermediate data used for creating the set of intermediate raster data to increase the amount of available space of the memory, the set of intermediate raster data being intermediate data in a raster format,
• wherein the deleting the one or more sets of extraction data, each having the reference to the other data, from the memory in the resource monitoring process is performed to reduce a number of times the intermediate flush process is to be performed, and
• wherein once the deleting the one or more sets of extraction data, each having the reference to the other data, from the memory in the resource monitoring process is performed, the intermediate flush process is not performed until the amount of available space of the memory is smaller than the prescribed determination amount.