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-<HTML>
-
-<TITLE>Cell Driver</TITLE>
-
-<link rel="stylesheet" type="text/css" href="mesa.css"></head>
-
-<BODY>
-
-<H1>Mesa/Gallium Cell Driver</H1>
-
-<p>
-The Mesa
-<a href="http://en.wikipedia.org/wiki/Cell_%28microprocessor%29" target="_parent">Cell</a>
-driver is part of the 
-<a href="http://wiki.freedesktop.org/wiki/Software/gallium" target="_parent">Gallium3D</a>
-architecture.
-Tungsten Graphics did the original implementation of the Cell driver.
-</p>
-
-
-<H2>Source Code</H2>
-
-<p>
-The latest Cell driver source code is on the master branch of the Mesa
-git repository.
-</p>
-<p>
-To build the driver you'll need the IBM Cell SDK (version 2.1 or 3.0).
-To use the driver you'll need a Cell system, such as a PS3 running Linux,
-or the Cell Simulator (untested, though).
-</p>
-
-<p>
-If using Cell SDK 2.1, see the configs/linux-cell file for some
-special changes.
-</p>
-
-<p>
-To compile the code, run <code>make linux-cell</code>.
-Or to build in debug mode, run <code>make linux-cell-debug</code>.
-</p>
-
-<p>
-To use the library, make sure your current directory is the top of the
-Mesa tree, then set <code>LD_LIBRARY_PATH</code> like this:
-<pre>
-  export LD_LIBRARY_PATH=$PWD/lib/gallium:$PWD/lib/
-</pre>
-
-<p>
-Verify that the Cell driver is being used by running
-<code>progs/xdemos/glxinfo</code> and looking for:
-<pre>
-  OpenGL renderer string: Gallium 0.3, Cell on Xlib
-</pre>
-
-
-<H2>Driver Implementation Summary</H2>
-
-<p>
-Rasterization is parallelized across the SPUs in a tiled-based manner.
-Batches of transformed triangles are sent to the SPUs (actually, pulled by from
-main memory by the SPUs).
-Each SPU loops over a set of 32x32-pixel screen tiles, rendering the triangles
-into each tile.
-Because of the limited SPU memory, framebuffer tiles are paged in/out of
-SPU local store as needed.
-Similarly, textures are tiled and brought into local store as needed.
-</p>
-
-
-<H2>Status</H2>
-
-<p>
-As of October 2008, the driver runs quite a few OpenGL demos.
-Features that work include:
-</p>
-<ul>
-<li>Point/line/triangle rendering, glDrawPixels
-<li>2D, NPOT and cube texture maps with nearest/linear/mipmap filtering
-<li>Dynamic SPU code generation for fragment shaders, but not complete
-<li>Dynamic SPU code generation for fragment ops (blend, Z-test, etc), but not complete
-<li>Dynamic PPU/PPC code generation for vertex shaders, but not complete
-</ul>
-<p>
-Performance has recently improved with the addition of PPC code generation
-for vertex shaders, but the code quality isn't too great yet.
-</p>
-<p>
-Another bottleneck is SwapBuffers.  It may be the limiting factor for
-many simple GL tests.
-</p>
-
-
-
-<H2>Debug Options</H2>
-
-<p>
-The CELL_DEBUG env var can be set to a comma-separated list of one or
-more of the following debug options:
-</p>
-<ul>
-<li><b>checker</b> - use a different background clear color for each SPU.
-   This lets you see which SPU is rendering which screen tiles.
-<li><b>sync</b> - wait/synchronize after each DMA transfer
-<li><b>asm</b> - print generated SPU assembly code to stdout
-<li><b>fragops</b> - emit fragment ops debug messages
-<li><b>fragopfallback</b> - don't use codegen for fragment ops
-<li><b>cmd</b> - print SPU commands as their received
-<li><b>cache</b> - print texture cache statistics when program exits
-</ul>
-<p>
-Note that some of these options may only work for linux-cell-debug builds.
-</p>
-
-<p>
-If the GALLIUM_NOPPC env var is set, PPC code generation will not be used
-and vertex shaders will be run with the TGSI interpreter.
-</p>
-<p>
-If the GALLIUM_NOCELL env var is set, the softpipe driver will be used
-intead of the Cell driver.
-This is useful for comparison/validation.
-</p>
-
-
-
-<H2>Contributing</H2>
-
-<p>
-If you're interested in contributing to the effort, familiarize yourself
-with the code, join the <a href="lists.html">mesa3d-dev mailing list</a>,
-and describe what you'd like to do.
-</p>
-
-
-</BODY>
-</HTML>