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Diffstat (limited to 'src/gallium/docs/pipeline.txt')
| -rw-r--r-- | src/gallium/docs/pipeline.txt | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/gallium/docs/pipeline.txt b/src/gallium/docs/pipeline.txt new file mode 100644 index 0000000000..fd1fbe9c76 --- /dev/null +++ b/src/gallium/docs/pipeline.txt @@ -0,0 +1,128 @@ +XXX this could be converted/formatted for Sphinx someday. +XXX do not use tabs in this file. + + + + position ] + primary/secondary colors ] + generics (normals, ] + texcoords, fog) ] User vertices / arrays + point size ] + edge flag ] + primitive ID } System-generated values + vertex ID } + | | | + V V V + +-------------------+ + | Vertex shader | + +-------------------+ + | | | + V V V + position + clip distance + generics + front/back & primary/secondary colors + point size + edge flag + primitive ID + | | | + V V V + +------------------------+ + | Geometry shader | + | (consume vertex ID) | + | (may change prim type) | + +------------------------+ + | | | + V V V + [...] + fb layer + | | | + V V V + +--------------------------+ + | Clipper | + | (consume clip distances) | + +--------------------------+ + | | | + V V V + +-------------------+ + | Polygon Culling | + +-------------------+ + | | | + V V V + +-----------------------+ + | Choose front or | + | back face color | + | (consume other color) | + +-----------------------+ + | | | + V V V + [...] + primary/secondary colors only + | | | + V V V + +-------------------+ + | Polygon Offset | + +-------------------+ + | | | + V V V + +----------------------+ + | Unfilled polygons | + | (consume edge flags) | + | (change prim type) | + +----------------------+ + | | | + V V V + position + generics + primary/secondary colors + point size + primitive ID + fb layer + | | | + V V V + +---------------------------------+ + | Optional Draw module helpers | + | * Polygon Stipple | + | * Line Stipple | + | * Line AA/smooth (as tris) | + | * Wide lines (as tris) | + | * Wide points/sprites (as tris) | + | * Point AA/smooth (as tris) | + | (NOTE: these stages may emit | + | new/extra generic attributes | + | such as texcoords) | + +---------------------------------+ + | | | + V V V + position ] + generics (+ new/extra ones) ] + primary/secondary colors ] Software rast vertices + point size ] + primitive ID ] + fb layer ] + | | | + V V V + +---------------------+ + | Triangle/Line/Point | + | Rasterization | + +---------------------+ + | | | + V V V + generic attribs + primary/secondary colors + primitive ID + fragment win coord pos } System-generated values + front/back face flag } + | | | + V V V + +-------------------+ + | Fragment shader | + +-------------------+ + | | | + V V V + zero or more colors + zero or one Z value + + +NOTE: The instance ID is not shown. It can be imagined to be a global variable +accessible to all shader stages. |