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1. 发明授权

US11532115B2 Data structures, methods and tiling engines for storing tiling information in a graphics processing system 有权
公开(公告)号：US11532115B2
公开(公告)日：2022-12-20
申请号：US17172313
申请日：2021-02-10
申请人： Imagination Technologies Limited
发明人： Xile Yang , Robert Brigg , Michael John Livesley
IPC分类号： G06T15/00 , G06T1/20 , G06T1/60
摘要： Data structures, methods and tiling engines for storing tiling data in memory wherein the tiles are grouped into tile groups and the primitives are grouped into primitive blocks. The methods include, for each tile group: determining, for each tile in the tile group, which primitives of each primitive block intersect that tile; storing in memory a variable length control data block for each primitive block that comprises at least one primitive that intersects at least one tile of the tile group; and storing in memory a control stream comprising a fixed sized primitive block entry for each primitive block that comprises at least one primitive that intersects at least one tile of the tile group, each primitive block entry identifying a location in memory of the control data block for the corresponding primitive block. Each primitive block entry may comprise valid tile information identifying which tiles of the tile group are valid for the corresponding primitive block. A tile is a valid tile for a primitive block if at least one primitive in the primitive block intersects that tile.

2. 发明授权

US11481952B2 Allocation of primitives to primitive blocks 有权
公开(公告)号：US11481952B2
公开(公告)日：2022-10-25
申请号：US17039564
申请日：2020-09-30
申请人： Imagination Technologies Limited
发明人： Xile Yang , John W. Howson , Jonathan Redshaw
IPC分类号： G06T15/04 , G06T11/00 , G06T11/40 , G06T15/80
摘要： An application sends primitives to a graphics processing system so that an image of a 3D scene can be rendered. The primitives are placed into primitive blocks for storage and retrieval from a parameter memory. Rather than simply placing the first primitives into a primitive block until the primitive block is full and then placing further primitives into the next primitive block, multiple primitive blocks can be “open” such that a primitive block allocation module can allocate primitives to one of the open primitive blocks to thereby sort the primitives into primitive blocks according to their spatial positions. By grouping primitives together into primitive blocks in accordance with their spatial positions, the performance of a rasterization module can be improved. For example, in a tile-based rendering system this may mean that fewer primitive blocks need to be fetched by a hidden surface removal module in order to process a tile.

3. 发明申请

US20220245755A1 Task Assembly for SIMD Processing Using Characteristics of Computation Instance for Allocation to a Task 有权
公开(公告)号：US20220245755A1
公开(公告)日：2022-08-04
申请号：US17724863
申请日：2022-04-20
申请人： Imagination Technologies Limited
发明人： Andrea Sansottera , Xile Yang , John Howson , Jonathan Redshaw
IPC分类号： G06T1/20 , G06T15/00 , G06T15/10 , G06T1/60 , G06T15/80 , G06T17/20
摘要： A cache system in a graphics processing system stores graphics data items for use in rendering primitives. It is determined whether graphics data items relating to primitives to be rendered are present in the cache, and if not then computation instances for generating the graphics data items are created. Computation instances are allocated to tasks using a task assembly unit which stores task entries for respective tasks. The task entries indicate which computation instances have been allocated to the respective tasks. The task entries are associated with characteristics of computation instances which can be allocated to the respective tasks. A computation instance to be executed is allocated to a task based on the characteristics of the computation instance. SIMD processing logic executes computation instances of a task outputted from the task assembly unit to thereby determine graphics data items, which can be used to render the primitives.

4. 发明授权

US11341601B2 Task assembly for SIMD processing 有权
公开(公告)号：US11341601B2
公开(公告)日：2022-05-24
申请号：US17030800
申请日：2020-09-24
申请人： Imagination Technologies Limited
发明人： Andrea Sansottera , Xile Yang , John Howson , Jonathan Redshaw
IPC分类号： G06T1/20 , G06T15/00 , G06T15/10 , G06T1/60 , G06T15/80 , G06T17/20
摘要： A cache system in a graphics processing system stores graphics data items for use in rendering primitives. It is determined whether graphics data items relating to primitives to be rendered are present in the cache, and if not then computation instances for generating the graphics data items are created. Computation instances are allocated to tasks using a task assembly unit which stores task entries for respective tasks. The task entries indicate which computation instances have been allocated to the respective tasks. The task entries are associated with characteristics of computation instances which can be allocated to the respective tasks. A computation instance to be executed is allocated to a task based on the characteristics of the computation instance. SIMD processing logic executes computation instances of a task outputted from the task assembly unit to thereby determine graphics data items, which can be used to render the primitives.

5. 发明申请

US20220084281A1 Primitive Block Generator for Graphics Processing Systems 有权
公开(公告)号：US20220084281A1
公开(公告)日：2022-03-17
申请号：US17536671
申请日：2021-11-29
申请人： Imagination Technologies Limited
发明人： Xile Yang , Robert Brigg , John W. Howson
IPC分类号： G06T15/40 , G06T15/00 , G06T1/60
摘要： Methods and primitive block generators for generating primitive blocks in a graphics processing system. The methods comprise: receiving transformed position data for a current primitive, the transformed position data indicating a position of the current primitive in rendering space; determining a distance between the position of the current primitive and a position of a current primitive block based on the transformed position data for the current primitive; determining whether to add the current primitive to the current primitive block based on the distance and a fullness of the current primitive block; in response to determining that the current primitive is to be added to the current primitive block, adding the current primitive to the current primitive block; and in response to determining that the current primitive is not to be added to the current primitive block, flushing the current primitive block and adding the current primitive to a new current primitive block.

6. 发明授权

US11257181B2 Tiling a primitive in a graphics processing system by edge-specific testing of a subset of tiles in a rendering space 有权
公开(公告)号：US11257181B2
公开(公告)日：2022-02-22
申请号：US16930191
申请日：2020-07-15
申请人： Imagination Technologies Limited
发明人： Xile Yang
IPC分类号： G06F13/14 , G06T1/20 , G06T11/40 , G06T15/00 , G06T1/60
摘要： In tile-based graphics processing systems, a tiling unit determines which tiles of a rendering space a primitive is in, such that the primitives in a tile can be rendered.
Rather than performing tiling calculations for each tile in a bounding box for a primitive, tiling tests can be performed for a subset of the tiles. Then the results of the tiling tests for the subset of tiles can be used to determine whether the primitive is in other tiles which are located within a region bounded by two or more of the tiles of the subset. In this way the tiling process can be implemented without performing tiling calculations for all of the tiles in the bounding box for a primitive. Reducing the number of tiling calculations can help to improve the efficiency of the graphics processing system (in terms of speed and power consumption) for rendering a primitive.

7. 发明授权

US11158023B2 Primitive block-based rasterization in graphics processing systems 有权
公开(公告)号：US11158023B2
公开(公告)日：2021-10-26
申请号：US16724234
申请日：2019-12-21
申请人： Imagination Technologies Limited
发明人： Robert Brigg , Xile Yang , John W. Howson
IPC分类号： G06T1/20 , G06T1/60 , G06T11/40
摘要： A graphics processing system having a rendering space divided into a plurality of tiles. The system comprises geometry processing logic and rasterization logic. The geometry processing logic is configured to generate transformed position data for each of a plurality of untransformed primitives based on untransformed geometry data associated therewith; group the plurality of untransformed primitives into a plurality of primitive blocks; and generate an untransformed display list for each tile based on the transformed position data. Each untransformed display list comprises: (i) information identifying each untransformed primitive block that comprises at least one untransformed primitive that, when transformed, falls at least partially with the tile; and (ii) for each identified untransformed primitive bock, information identifying the untransformed primitives or transformed primitives related to that untransformed primitive block relevant for rendering the tile. The rasterization logic is configured to fetch, for each primitive block identified in an untransformed display list for a tile, untransformed geometry data for all of the untransformed primitives in that untransformed primitive block; transform the fetched untransformed geometry data to generate transformed geometry data; and render the primitives from the transformed geometry data.

8. 发明申请

US20210279954A1 GRAPHICS PROCESSING METHOD AND SYSTEM FOR RENDERING ITEMS OF GEOMETRY BASED ON THEIR SIZE 有权
公开(公告)号：US20210279954A1
公开(公告)日：2021-09-09
申请号：US17169828
申请日：2021-02-08
申请人： Imagination Technologies Limited
发明人： Xile Yang , Robert Brigg
IPC分类号： G06T17/10 , G06T15/04 , G06T11/20
摘要： Methods and graphics processing systems render items of geometry using a rendering space which is subdivided into a plurality of first regions. Each of the first regions is sub-divided into a plurality of second regions. Each of a plurality of items of geometry is processed by identifying which of the first regions the item of geometry is present within, and for each identified first region determining an indication of the spatial coverage, within the identified first region, of the item of geometry, and using the determined indication of the spatial coverage within the identified first region to determine whether to add the item of geometry to a first control list for the identified first region or to add the item of geometry to one or more second control lists for a respective one or more of the second regions within the identified first region. Items of geometry within a second region can then be rendered using: (i) the first control list for the first region of which the second region is a part, and (ii) the second control list for the second region.

9. 发明申请

US20210279936A1 GRAPHICS PROCESSING METHOD AND SYSTEM FOR RENDERING ITEMS OF GEOMETRY BASED ON THEIR SIZE 有权
公开(公告)号：US20210279936A1
公开(公告)日：2021-09-09
申请号：US17169607
申请日：2021-02-08
申请人： Imagination Technologies Limited
发明人： Xile Yang , Robert Brigg
IPC分类号： G06T15/00 , G06T15/04 , G06T11/20
摘要： Methods and graphics processing systems render primitives using a rendering space which is subdivided into a plurality of regions. Geometry processing logic performs a geometry processing phase which determines, for each of a plurality of primitives which are present in a region, whether the primitive totally covers the region; and stores data for the primitives which are present in the region, wherein the stored data comprises, for each of the primitives which are determined to totally cover the region, data to indicate total coverage of the region. Rendering logic performs a rendering phase for rendering primitives within the region. The rendering phase retrieves the stored data for the primitives which are present in the region; selectively processes the primitives which are present in the region based on the retrieved data to determine which sample points within the region are covered by the primitives, wherein if the retrieved data includes data which indicates total coverage of the region for a particular primitive then the processing determines which sample points within the region are covered by the particular primitive is skipped; and determines rendered values at the sample points within the region based on the primitives which cover the respective sample points.

10. 发明申请

US20210248805A1 METHODS AND CONTROL STREAM GENERATORS FOR GENERATING A CONTROL STREAM FOR A TILE GROUP IN A GRAPHICS PROCESSING SYSTEM 有权
公开(公告)号：US20210248805A1
公开(公告)日：2021-08-12
申请号：US17170590
申请日：2021-02-08
申请人： Imagination Technologies Limited
发明人： Diego Jesus , John W. Howson , Panagiotis Velentzas , Robert Brigg , Xile Yang
IPC分类号： G06T15/00 , G06T11/40 , G06T1/20 , G06T1/60
摘要： 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.

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