High-performance graphics cores developed by Stellar Semiconductor Inc. and GigaPixel Corp., both of Santa Clara, Calif., provide 128-bit pipelines to accelerate 2D and 3D graphics applications. Stellar's TX2DIII core uses a triple 128-bit pipeline to accelerate 2D graphics. It can support screen-to-screen bit-block transfer rates of 860 Mbytes/s and block fills at 5.4 Gbytes/s. Able to support all standard 2D operations, such as bit-block transfers, block fills, vector drawing, color keying and patterns, monochrome bitmaps, and fonts, the triple-pipeline architecture permits any 2D operation to have three operands (three sources combined to any destination). Additional core features let it perform font scaling, transparency, hardware-assisted highlighting, and other functions. The front-end scaling logic supports both RGB and YUV 4:2:2 (YCrCb) formats. Also, it employs dual Bresenham algorithms to determine when to add or drop pixels when scaling from 0.5 to 4 times the source image size. When implemented in various 0.25-µm CMOS processes, the core can run at clock speeds of 135 MHz. The core, along with drivers for Windows 95, 98, and NT, is available for licensing. The company provides a C-level emulator, a low-level hardware-abstraction-layer model, a test bench, and full regression test suites. Contact Alex Aali at Stellar, (408) 955-9663 ext. 123, or go to
http://www.stellarsemi.com.
Fully compatible with Direct 3D and OpenGL interfaces, GigaPixel's GP-1 graphics core employs the company's SmartTile architecture. The processor tiles the frame, determines the visible pixels, and renders the tiles. By processing just the visible pixels for setup, shading, and filtering, the processor greatly reduces internal computational requirements and memory bandwidth needs. Special effects such as specular highlights, diffuse shading, alpha blending, and many others are supported by the core as well. A single GP-1 core can effectively process four pixels per clock, with each pixel texture mapped, trilinear filtered, full-scene antialiased, and Z-buffered. Multiple GP-1 cores also can be integrated into a single design to further accelerate the graphics performance. Contact Keith Uhlin at GigaPixel, (408) 654-8005, or on the web at
http://www.gigapixel.com.