Patent ID: 9530177
Filing Date: 2016-12-27
CPC Classification: G06T,G09G

Claim Text:
1. A data access method, for a data access device to access data from N layers to display an image, N being a positive integer, each of the N layers comprising a horizontal start point, a horizontal end point, a vertical start point and a vertical end point, the method comprising: dividing the image into a plurality of regions according to the horizontal start points, the horizontal end points, the vertical start points and the vertical end points, wherein the regions respectively correspond to the layers; and accessing data from the respective layers corresponding to the regions when displaying the image, wherein the steps of dividing the image into the plurality of regions and accessing data from the respective layers corresponding to the regions comprise: defining a plurality of vertical sections according to the N vertical start points and the N vertical end points, and performing a sorting procedure according to a layer display priority sequence for one or a plurality of layers included in a range of each of the vertical sections to obtain a vertical sequence result for each of the vertical sections, where N is a positive integer; and defining a plurality of horizontal sections according to the N horizontal start points and the N horizontal end points, and performing a sorting procedure according to a layer display priority sequence and one or a plurality of layers included in a range of each of the horizontal sections to obtain a horizontal sequence result for each of the horizontal sections; wherein, the vertical sections are for the data access device to determine whether a vertical position of a horizontal scan line is located in one of the vertical sections; when the vertical position of the scan line is located in one of the vertical sections, the vertical sequence result corresponding to the vertical section and the N horizontal sequence results are for the data access device to determine to which of the N layers the horizontal section in the vertical section corresponds, and are for the data access device to accordingly access data from one of the N layers.