Imagination Technologies Limited

Diego Jesus

John William Howson

Xile Yang

Robert Brigg

Panagiotis Velentzas

Methods and tiling engines for tiling primitives in a tile based graphics processing system in which a rendering space is divided into a plurality of tiles. The method includes generating a multi-level hierarchy of tile groups, each level of the multi-level hierarchy comprising one or more tile groups comprising one or more of the plurality of tiles; receiving a plurality of primitive blocks, each primitive block comprising geometry data for one or more primitives; associating each of the plurality of primitive blocks with one or more of the tile groups up to a maximum number of tile groups such that if at least one primitive of a primitive block falls, at least partially, within the bounds of a tile, the primitive block is associated with at least one tile group that includes that tile; and generating a control stream for each tile group based on the associations, wherein each control stream comprises a primitive block entry for each primitive block associated with the corresponding tile group.

Data structures, methods and tiling engines for hierarchically storing tiling information in a graphics processing system

Methods and control stream generators for generating a control stream for a tile group comprising at least two tiles, the control stream identifying primitive blocks that are relevant to rendering at least one tile in the tile group. Information is received identifying one or more primitive blocks relevant to rendering at least one tile in the tile group, each primitive block comprising one or more primitives; generating a primitive block entry for each of the identified primitive blocks; and adding each primitive block entry to the control stream; wherein generating the primitive block entry for at least one of the identified primitive blocks comprises: (i) identifying a bounding box encompassing the one or more primitives of the primitive block; (ii) generating a coverage mask that indicates which tiles of the tile group that intersect the bounding box for the primitive block are valid for the primitive block, a tile being valid for a primitive block if at least one primitive of the primitive blocks falls, at least partially, within the bounds of the tile; and (iii) including the coverage mask in the primitive block entry.

Methods and control stream generators for generating a control stream for a tile group in a graphics processing system

Methods and control stream generators for generating a control stream for a tile group comprising at least two tiles, the control stream identifying primitive blocks that are relevant to rendering at least one tile in the tile group. The method includes: receiving information identifying one or more primitive blocks relevant to rendering at least one tile in the tile group, each primitive block comprising one or more primitives; generating a primitive block entry for each of the identified primitive blocks; and adding each primitive block entry to the control stream; wherein generating the primitive block entry for at least one of the identified primitive blocks comprises: (i) identifying a bounding box encompassing the one or more primitives of the primitive block; (ii) generating a coverage mask that indicates which tiles of the tile group that intersect the bounding box for the primitive block are valid for the primitive block, a tile being valid for a primitive block if at least one primitive of the primitive blocks falls, at least partially, within the bounds of the tile; and (iii) including the coverage mask in the primitive block entry.

Growing community of inventors

Watford, United Kingdom

Diego Jesus