Invention Grant
- Patent Title: Path rendering with path clipping
- Patent Title (中): 路径渲染与路径剪辑
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Application No.: US13110777Application Date: 2011-05-18
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Publication No.: US08698837B2Publication Date: 2014-04-15
- Inventor: Mark J. Kilgard
- Applicant: Mark J. Kilgard
- Applicant Address: US CA Santa Clara
- Assignee: Nvidia Corporation
- Current Assignee: Nvidia Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Patterson + Sheridan, L.L.P.
- Main IPC: G09G5/02
- IPC: G09G5/02

Abstract:
One embodiment of the present invention sets forth a technique for rendering clipped paths by first generating clip stencil buffer state indicating pixels that are inside of the clip path. The clip stencil buffer state may also store an opacity value for each covered pixel to generate a mask that modulates the opacity of a draw path that is clipped. Clipped draw stencil buffer state is then generated indicating pixels of the draw path that should be covered based on the clip stencil buffer state and coverage of the draw path. The clipped draw path is then filled or stroked to produce the clipped draw path. The clip and draw paths may be filled or stroked without tessellating the paths. Path rendering may be accelerated when a GPU or other processor that is configured to perform operations to generate the clip stencil buffer state and the clipped draw stencil buffer state, and to fill or stroke the clipped draw path.
Public/Granted literature
- US20110285740A1 PATH RENDERING WITH PATH CLIPPING Public/Granted day:2011-11-24
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