Point command processing method of pdi

Abstract

Abstract PURPOSE:To attain the coloring for each display dot and optional size block by using a means which calculates and stores the position coordinates of dots to be drawn, a means which checks that those dots exist within a drawing area and a means which draws the colored dots. CONSTITUTION:A point command is processed by a receiver operation code, and the X and Y coordinates are calculated for the first dot based on the data showing the logical coordinates and the logical picture element size of the dot in response to the designation of a P-domain in the data. These X and Y coordinates are stored to each register. When the present command is equal to a POINT-A, the X coordinates is transferred and stored to a drawing register after confirming that the X coordinates exist within a drawing range. Then the Y coordinates is transferred and stored to the drawing register after confirming that the Y coordinates exists within a drawing area. Then the dots are drawn in colors based on the coloring data as well as the contents of both X and Y drawing registers. This operation is performed successively with all dots within a logical picture element size. Then the designated dot is colored.

Inventors

• 👤 Takahiro Yamazaki
• 👤 山崎　隆宏
• 👤 Masakatsu Yamamoto
• 👤 山本　昌克

Bibliographic Details