Abstract: A graphic apparatus is connected between a host computer and a monitor for admitting video data from a video source to display a picture on the monitor according to commands from the host computer. The graphic apparatus is constructed by a local memory, an admitting unit, a driver unit and a drawing tool. The local memory is provided separately from the host computer, and is functionally divided into a video memory area for storing video data including those representing a graphic pattern and a frame memory area for storing video data representing a picture to be displayed. The admitting unit operates in response to an admission command from the host computer for admitting video data from the video source and reserving the admitted video data in the video memory area. The driver unit operates in response to a drive command from the host computer for transferring the video data from the frame memory area to the monitor so as to display the picture.

Abstract: A texture mapping apparatus graphically applies a texture pattern to a polygonal area of an object presented in a display plane. A memory is defined with a texture plane corresponding to the display plane for recording in the texture plane pattern data representative of the texture pattern. A zone operator truncates the polygonal area sequentially in a longitudinal direction to determine a set of parallel zones which extend along a lateral direction in the display plane, and to subsequently determine a set of corresponding zones in the texture plane. A segment operator interpolatively divides one parallel zone to determine a stripe of lateral segments, and to subsequently determine a group of corresponding segments within the corresponding zone of the texture plane.