Method Using Partial Swath Blocks to Buffer Rasterized Text in Multi-Line APA Printers
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
A method is described which allows for efficient use of printer memory, processing time, and ribbon by using a block structure for storing rasterized text rather than a full swath of memory. This method may be used as All-Points-Addressable (APA) printers that must rasterize characters from pel patterns or by using mathematical algorithms, and is especially useful for printers that normally print more than one line of text with each pass and/or also support image and graphics print objects. The tasks are temporarily stored in a buffer known as the Task Table. In this table, they are still in coded form, i.e., code points for text and vectors for graphics. A swath of print tasks is built by first linking the tasks in the task table that are completely located within the boundaries of the swath.