OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

asahi: factor out libagx_map_vertex_in_tri_strip

Browse Source 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26963>
This commit is contained in:
Alyssa Rosenzweig
2024-01-02 18:10:03 -04:00
parent 9d78e40735
commit f70da4e920
1 changed files with 20 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
src/asahi/lib/shaders/geometry.cl
View File

@@ -12,6 +12,23 @@ align(uint x, uint y)
return (x + 1) & ~(y - 1);
}
/* Swap the two non-provoking vertices third vert in odd triangles. This
* generates a vertex ID list with a consistent winding order.
*
* With prim and flatshade_first, the map : [0, 1, 2] -> [0, 1, 2] is its own
* inverse. This lets us reuse it for both vertex fetch and transform feedback.
*/
uint
libagx_map_vertex_in_tri_strip(uint prim, uint vert, bool flatshade_first)
{
unsigned pv = flatshade_first ? 0 : 2;
bool even = (prim & 1) == 0;
bool provoking = vert == pv;
return (provoking || even) ? vert : ((3 - pv) - vert);
}
uint64_t
libagx_xfb_vertex_address(global struct agx_geometry_params *p, uint base_index,
uint vert, uint buffer, uint stride,
@@ -57,16 +74,10 @@ libagx_vertex_id_for_topology(enum mesa_prim mode, bool flatshade_first,
*
* First: (0, 1, 2), (1, 3, 2), (2, 3, 4).
* Last: (0, 1, 2), (2, 1, 3), (2, 3, 4).
*
* Pull the (maybe swapped) vert from the corresponding primitive
*/
unsigned pv = flatshade_first ? 0 : 2;
/* Swap the two non-provoking vertices third vert in odd triangles */
bool even = (prim & 1) == 0;
bool provoking = vert == pv;
uint off = (provoking || even) ? vert : ((3 - pv) - vert);
/* Pull the (maybe swapped) vert from the corresponding primitive */
return prim + off;
return prim + libagx_map_vertex_in_tri_strip(prim, vert, flatshade_first);
}
case MESA_PRIM_TRIANGLE_FAN: {