GPU Artwork Clipping and Culling via Depth Stencil Buffers
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Solution Overview
Problem
Rendering complex two-dimensional artwork on computer systems requires numerous time-consuming clipping and culling operations, which can be inefficient due to the need for atomic operations on every object, regardless of size.
Innovation Solution
The system automatically groups artwork objects using batch early engagement rules and performs culling and clipping operations using a graphics processing unit (GPU), configuring the depth buffer to reject pixels outside dirty regions and the stencil buffer to reject pixels outside clip paths, thereby reducing the number of necessary operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional CPU-based clipping and culling operations are performed on every artwork object, then rendering accuracy is maintained, but rendering time and computational complexity increase significantly
Solution Approach 1:
The patent segments the rendering process by separating clipping and culling operations from the main rendering pipeline. Artwork objects are pre-processed to determine which ones fall within the visible viewport and clip paths before being sent to the renderer, dividing the work between CPU (culling) and GPU (rendering)
Solution Approach 2:
The patent applies preliminary action by performing culling operations before rendering. The system calculates which artwork objects are visible within the viewport and clip paths in advance, eliminating invisible objects from the rendering process to save computational time
2Manufacturing precision
If clipping and culling operations are performed on every individual artwork object, then rendering precision is maintained, but device complexity and processing overhead increase
Solution Approach 1:
The patent merges multiple clipping and culling operations into a unified process. Instead of separately handling clip paths, viewports, and object bounds for each artwork object, the system combines these into a single visibility determination step that checks whether artwork bounding boxes intersect with the visible region
3Reliability
If all artwork objects are processed through clipping operations, then visual accuracy is maintained, but productivity and rendering throughput decrease
Solution Approach 1:
The patent extracts and removes invisible artwork objects from the processing pipeline before rendering. By calculating which objects fall outside the viewport or clip paths and excluding them from rendering, the system maintains visual accuracy for visible objects while improving overall rendering throughput
Data Source
AI summary
A method, system, and computer-readable storage medium are disclosed for rendering artwork using a graphics processing unit (GPU). The GPU may comprise a depth buffer and a stencil buffer. Artwork input comprising one or more dirty regions and one or more clip paths may be received at the GPU. A culling operation may be performed on the artwork input. The culling operation may comprise configuring the depth buffer to reject pixels located outside a union of the one or more dirty regions. A clipping operation may be performed on the artwork input. The clipping operation may comprise configuring the stencil buffer to reject pixels located outside an intersection of the one or more clip paths.