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authorIlia Mirkin <imirkin@alum.mit.edu>2016-11-24 13:27:48 -0500
committerIlia Mirkin <imirkin@alum.mit.edu>2016-12-08 22:47:39 -0500
commit429e2ec324674ba8c3412b331da56d9a8808cd38 (patch)
tree68c264d4446071e758f6db16adfb6e442dc9a552 /src
parent192317dfeb8c9223b702196e0c8e8c555c24b844 (diff)
swr: [rasterizer core] supply proper clip distances to point sprites
Large points become pairs of triangles when rasterized, so we must feed it three clip distances, one for each vertex. The clip distance is not subject to sprite coord replacement, so there's no interpolation of it. We just take its value and put it in the "z" component of the barycentric-ready plane equation. (We could also just cull it at an earlier point in time, but that would require larger changes.) Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Reviewed-by: Tim Rowley <timothy.o.rowley@intel.com>
Diffstat (limited to 'src')
-rw-r--r--src/gallium/drivers/swr/rasterizer/core/binner.cpp12
1 files changed, 9 insertions, 3 deletions
diff --git a/src/gallium/drivers/swr/rasterizer/core/binner.cpp b/src/gallium/drivers/swr/rasterizer/core/binner.cpp
index 1538020a518..d5f2e97027d 100644
--- a/src/gallium/drivers/swr/rasterizer/core/binner.cpp
+++ b/src/gallium/drivers/swr/rasterizer/core/binner.cpp
@@ -1185,9 +1185,15 @@ void BinPoints(
if (rastState.clipDistanceMask)
{
uint32_t numClipDist = _mm_popcnt_u32(rastState.clipDistanceMask);
- float one[2] = {1.0f, 1.0f};
- desc.pUserClipBuffer = (float*)pArena->Alloc(numClipDist * 2 * sizeof(float));
- ProcessUserClipDist<2>(pa, primIndex, rastState.clipDistanceMask, one, desc.pUserClipBuffer);
+ desc.pUserClipBuffer = (float*)pArena->Alloc(numClipDist * 3 * sizeof(float));
+ float dists[8];
+ float one = 1.0f;
+ ProcessUserClipDist<1>(pa, primIndex, rastState.clipDistanceMask, &one, dists);
+ for (uint32_t i = 0; i < numClipDist; i++) {
+ desc.pUserClipBuffer[3*i + 0] = 0.0f;
+ desc.pUserClipBuffer[3*i + 1] = 0.0f;
+ desc.pUserClipBuffer[3*i + 2] = dists[i];
+ }
}
MacroTileMgr *pTileMgr = pDC->pTileMgr;