swr: [rasterizer core] Add clipping against user clip distances in the NullPS backend.
diff --git a/src/gallium/drivers/swr/rasterizer/core/backend.cpp b/src/gallium/drivers/swr/rasterizer/core/backend.cpp
index c9a5fd0..7fb83ed 100644
--- a/src/gallium/drivers/swr/rasterizer/core/backend.cpp
+++ b/src/gallium/drivers/swr/rasterizer/core/backend.cpp
@@ -1410,9 +1410,11 @@
RDTSC_START(BESetup);
static const SWR_MULTISAMPLE_COUNT sampleCount = (SWR_MULTISAMPLE_COUNT)sampleCountT;
+
SWR_CONTEXT *pContext = pDC->pContext;
const API_STATE& state = GetApiState(pDC);
const BACKEND_FUNCS& backendFuncs = pDC->pState->backendFuncs;
+ const SWR_RASTSTATE& rastState = pDC->pState->state.rastState;
// broadcast scalars
BarycentricCoeffs coeffs;
@@ -1451,7 +1453,8 @@
while (_BitScanForward(&sample, sampleMask))
{
sampleMask &= ~(1 << sample);
- if (work.coverageMask[sample] & MASK)
+ simdmask coverageMask = work.coverageMask[sample] & MASK;
+ if (coverageMask)
{
RDTSC_START(BEBarycentric);
// calculate per sample positions
@@ -1465,7 +1468,14 @@
RDTSC_STOP(BEBarycentric, 0, 0);
- simdscalar vCoverageMask = vMask(work.coverageMask[sample] & MASK);
+ // interpolate user clip distance if available
+ if (rastState.clipDistanceMask)
+ {
+ coverageMask &= ~ComputeUserClipMask(rastState.clipDistanceMask, work.pUserClipBuffer,
+ psContext.vI.sample, psContext.vJ.sample);
+ }
+
+ simdscalar vCoverageMask = vMask(coverageMask);
simdscalar stencilPassMask = vCoverageMask;
// offset depth/stencil buffers current sample