The SAGE graphics architecture

M. Deering, David Naegle
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引用次数: 26

Abstract

The Scalable, Advanced Graphics Environment (SAGE) is a new high-end, multi-chip rendering architecture. Each single SAGE board can render in excess of 80 million fully lit, textured, anti-aliased triangles per second. SAGE brings high quality antialiasing filters to video rate hardware for the first time. To achieve this, the concept of a frame buffer is replaced by a fully double-buffered sample buffer of between 1 and 16 non-uniformly placed samples per final output pixel. The video output raster of samples is subject to convolution by a 5x5 programmable reconstruction and bandpass filter that replaces the traditional RAMDAC. The reconstruction filter processes up to 400 samples per output pixel, and supports any radially symmetric filter, including those with negative lobes (full Mitchell-Netravali filter). Each SAGE board comprises four parallel rendering sub-units, and supports up to two video output channels. Multiple SAGE systems can be tiled together to support even higher fill rates, resolutions, and performance.
SAGE图形架构
可扩展的高级图形环境(SAGE)是一种新的高端多芯片渲染架构。每个单一的SAGE板每秒可以渲染超过8000万个完全照明,纹理,抗锯齿的三角形。SAGE首次为视频速率硬件带来高质量的抗混叠滤波器。为了实现这一点,帧缓冲区的概念被一个完全双缓冲的样本缓冲区所取代,每个最终输出像素有1到16个不均匀放置的样本。采样的视频输出栅格通过5x5可编程重构带通滤波器进行卷积,该滤波器取代了传统的RAMDAC。重建滤波器每输出像素处理多达400个样本,并支持任何径向对称滤波器,包括那些负瓣(全米切尔-尼特拉瓦利滤波器)。每个SAGE板由四个并行渲染子单元组成,最多支持两个视频输出通道。多个SAGE系统可以拼接在一起,以支持更高的填充率、分辨率和性能。
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