Graphics processing

When tile-based rendering is performed in a graphics processing system, a list representing segments to be processed is maintained for a respective sub-region of a tile to be rendered, where each list entry represents a set of one or more segments and includes an indication of a coverage of the set of segments represented by the list entry within the tile sub-region. The coverage information of the list entries is then used to set information for entries in the list representing segments to be processed for the sub-region that indicates whether one or more processing operations are eligible to be performed for the segments represented by the entries in the list. 当在图形处理系统中执行基于图块的渲染时，针对待渲染的图块的相应子区域维护表示待处理的片段的列表，其中每个列表条目表示一组一个或多个片段并且包括列表条目所表示的一组片段在图块子区域内的覆盖范围的指示。然后使用列表条目的覆盖范围信息来为表示针对子区域待处理的片段的列表中的条目设置指示是否有资格针对列表中的条目所表示的片段执行一个或多个处理操作的信息。