llvmpipe: add NV_conditional_render support.

This ports the softpipe NV_conditional_render support to llvmpipe.

This passes the nv_conditional_render-* piglit tests.

Signed-off-by: Dave Airlie <[email protected]>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_query.c b/src/gallium/drivers/llvmpipe/lp_query.c
index 1e2401fa84d..42eb8566ef4 100644
--- a/src/gallium/drivers/llvmpipe/lp_query.c
+++ b/src/gallium/drivers/llvmpipe/lp_query.c
@@ -154,6 +154,24 @@ llvmpipe_end_query(struct pipe_context *pipe, struct pipe_query *q)
    llvmpipe->dirty |= LP_NEW_QUERY;
 }
 
+boolean
+llvmpipe_check_render_cond(struct llvmpipe_context *lp)
+{
+   struct pipe_context *pipe = &lp->pipe;
+   boolean b, wait;
+   uint64_t result;
+
+   if (!lp->render_cond_query)
+      return TRUE; /* no query predicate, draw normally */
+   wait = (lp->render_cond_mode == PIPE_RENDER_COND_WAIT ||
+           lp->render_cond_mode == PIPE_RENDER_COND_BY_REGION_WAIT);
+
+   b = pipe->get_query_result(pipe, lp->render_cond_query, wait, &result);
+   if (b)
+      return result > 0;
+   else
+      return TRUE;
+}
 
 void llvmpipe_init_query_funcs(struct llvmpipe_context *llvmpipe )
 {