swr: fix provoking vertex

Use rasterizer provoking vertex API.

Fix rasterizer provoking vertex for tristrips and quad list/strips.

v2: make provoking vertex tables static const

Reviewed-by: Bruce Cherniak <[email protected]>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/gallium/drivers/swr/swr_state.cpp b/src/gallium/drivers/swr/swr_state.cpp
index f9326f35230..f50537f3a61 100644
--- a/src/gallium/drivers/swr/swr_state.cpp
+++ b/src/gallium/drivers/swr/swr_state.cpp
@@ -1351,7 +1351,10 @@ swr_update_derived(struct pipe_context *pipe,
    SWR_BACKEND_STATE backendState = {0};
    backendState.numAttributes = 1;
    backendState.numComponents[0] = 4;
-   backendState.constantInterpolationMask = ctx->fs->constantMask;
+   backendState.constantInterpolationMask =
+      ctx->rasterizer->flatshade ?
+      ctx->fs->flatConstantMask :
+      ctx->fs->constantMask;
    backendState.pointSpriteTexCoordMask = ctx->fs->pointSpriteMask;
 
    SwrSetBackendState(ctx->swrContext, &backendState);