公开(公告)号：WO1997039437A1

公开(公告)日：1997-10-23

申请号：PCT/US1997005983

申请日：1997-04-11

Applicant: INTERGRAPH CORPORATION

Inventor： INTERGRAPH CORPORATION ,  BUCKELEW, Matt, E. ,  CARLTON, Stewart, G. ,  DEMING, James, L. ,  FARMER, Michael, S. ,  HEINRICH, Steven, J. ,  MOSLEY, Mark, A. ,  WHITMORE, Clifford, A.

IPC: G09G01/16

CPC classification number: G09G5/363 ,  G09G5/022 ,  G09G5/39 ,  G09G5/393 ,  G09G5/395 ,  G09G5/399 ,  G09G2360/12 ,  G09G2360/121 ,  G09G2360/123 ,  G09G2360/128 ,  G11C7/1015 ,  G11C7/1018 ,  G11C8/00 ,  G11C8/04

Abstract: In standard display systems pixel data are stored in the frame buffer such that all data related to a pixel (both intensity values and non-display data as masks, Fast Clear etc.) are stored in a memory word; consecutive pixels of a line are stored in subsequent memory words. This data arrangement causes several memory accesses to be necessary for operations as drawing etc. on a set of neighbouring pixels. The present invention speeds up such operations by subdividing the display area in (rectangular) blocks, whose pixel data are stored in corresponding blocks of subsequent memory words. For each pixel, display data only are stored in a block, and non-display data are stored elsewhere, so that burst access mode can be used for accessing a set of neighbouring pixel display data in a single operation. The arrangement based on rectangular blocks is particularly advantageous for writing triangles, vectors etc. Each block is preferably stored across interleaved memory banks, that may be accessed in parallel for rendering and display. Dual bank operation (opening two pages at once) can be effected according to a checker-board block allocation, which still improves triangle and vector management. The invention is particularly suitable for SDRAM arrays having a single access port.

Abstract translation: 在标准显示系统中，将像素数据存储在帧缓冲器中，使得与像素（强度值和非显示数据作为掩码，快速清除等）相关的所有数据都存储在存储器字中; 一行的连续像素被存储在随后的存储字中。 该数据排列导致对一组相邻像素上的绘图等操作需要几个存储器访问。 本发明通过将（矩形）块中的显示区域细分，将其像素数据存储在后续存储字的相应块中来加速这种操作。 对于每个像素，仅显示数据被存储在块中，并且非显示数据被存储在别处，使得突发存取模式可用于在单个操作中访问一组相邻像素显示数据。 基于矩形块的布置对于写入三角形，向量等是特别有利的。每个块优选地存储在交叉存储器组之间，可以并行访问以进行渲染和显示。 双行操作（一次打开两页）可以根据棋盘块分配进行，这仍然可以改善三角形和矢量管理。 本发明特别适用于具有单个访问端口的SDRAM阵列。