Image forming device and image forming method

An image forming method, comprising:

• a receiving step of receiving document information and additional information;
• an intermediate data generation step of sequentially generating intermediate data for generating a raster image from the received information;
• a step of sequentially storing the generated intermediate data into a first buffer;
• and
• a compression step of generating a raster image compressed from the intermediate data of the document information in the first buffer to store the raster image into the second buffer, and deleting the intermediate data of the document information in the first buffer, in case that the received additional information includes a command to draw a special pattern.

A program on a computer-readable recording medium for performing a method comprising:

• a receiving step of receiving document information and additional information;
• an intermediate data generation step of sequentially generating intermediate data for generating a raster image from the received information;
• a step of sequentially storing the generated intermediate data into a first buffer;
• and
• a compression step of generating a raster image compressed from the intermediate data of the document information in the first buffer to store the raster image into the second buffer, and deleting the intermediate data of the document information in the first buffer, in case that the received additional information includes a command to draw a special pattern.