公开(公告)号：US20020101428A1

公开(公告)日：2002-08-01

申请号：US10055959

申请日：2002-01-28

Applicant: Silicon Integrated Systems Corp.

Inventor： Chien-chung Hsiao ,  Kwo-woei Yet ,  Chung-yung Lee

IPC: G09G005/399 ,  G09G005/36 ,  G06T001/20

CPC classification number: G06T15/005 ,  G09G5/363 ,  G09G5/393 ,  G09G5/399 ,  G09G2340/10

Abstract: The invention provides a graphic engine and a method that reduces the idle time of the graphic engine by validity test. The validity test is performed when the back buffer is full and the graphic engine continues to write a primitive into a front buffer. The validity test compares the maximum Y-coordinate of the primitive with the Y-coordinate of the current scan line. If the maximum Y-coordinate of the primitive is less than the Y-coordinate of the current scan line, the graphic engine keeps on executing the primitive processing procedure. On the other hand, if the maximum Y-coordinate of the primitive is greater than or equal to the Y-coordinate of the current scan line, the graphic engine halts the primitive processing procedure until the maximum Y-coordinate of the primitive is less than the Y-coordinate of the current scan line.

Abstract translation: 本发明提供了一种通过有效性测试来减少图形引擎的空闲时间的图形引擎和方法。 当后台缓冲区已满并且图形引擎继续向原始缓冲区写入原语时，执行有效性测试。 有效性测试将原语的最大Y坐标与当前扫描线的Y坐标进行比较。 如果原语的最大Y坐标小于当前扫描线的Y坐标，则图形引擎将继续执行原始处理过程。 另一方面，如果原语的最大Y坐标大于或等于当前扫描线的Y坐标，则图形引擎停止原语处理过程，直到原语的最大Y坐标小于 当前扫描线的Y坐标。