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Diffstat (limited to 'docs/cell.html')
| -rw-r--r-- | docs/cell.html | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/docs/cell.html b/docs/cell.html index 4a9ab1439..7fbbba7c7 100644 --- a/docs/cell.html +++ b/docs/cell.html @@ -88,18 +88,18 @@ Features that work include: </p> <ul> <li>Point/line/triangle rendering, glDrawPixels -<li>2D texture maps with nearest/linear/mipmap filtering -<li>NPOT textures -<li>Cube maps, to some extent +<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> -In general, however, the driver is rather slow because all vertex -transformation is being done by an interpreter running on the PPU. -Programs with many vertices or complex vertex shaders will run especially -slow. -This will be addressed in the future. +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> @@ -118,9 +118,17 @@ more of the following debug options: <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. |