Computer graphics processing and selective visual display system – Computer graphic processing system – Plural graphics processors
Patent
1998-12-22
2000-06-13
Tung, Kee M.
Computer graphics processing and selective visual display system
Computer graphic processing system
Plural graphics processors
345509, G06F 1300
Patent
active
060755431
ABSTRACT:
A system and method for managing multiple frame buffers. The system includes multiple frame buffers, and thus reduces the risk of dropped frames. The system controls and bounds render-to-display latency, and provides an application friendly and effective interface to the frame buffers. The system operates by estimating a latency of a frame that is yet to be rendered. The system determines whether the latency is greater than a target latency. If the latency is greater than the target latency, then the system blocks the application that is responsible for rendering the frame before rendering of the frame commences. As a result, render-to-display latency is bounded to the target latency. The system addresses the naming issue by providing the application with access to only the front buffer and the back buffer. In particular, the present system maintains a queue of one or more frame buffers. The newest frame buffer appended to the queue is considered to be the front buffer. The oldest frame buffer in the queue is displayed. A frame buffer not in the queue is considered to be the back buffer. Rendering is enabled to the back buffer. Once rendering to the back buffer is complete, the back buffer is appended to the queue and becomes the new front buffer.
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Neider et al., OpenGL Programming Guide: The Official Guide to Learning OpenGL, Release 1, Copyright 1993, Silicon Graphics, Inc.
OpenGL Architecture Review Board, OpenGL Reference Manual: The Official reference Document for OpenGL, Release 1, Copyright 1992, Silicon Graphics, Inc.
Silicon Graphics Inc.
Tung Kee M.
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