[Mesa-dev] [PATCH] st/mesa: don't try to clear depth and stencil together in glClear fallback

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

A lot of GPUs allocate separate depth and stencil buffers, so clearing them
together doesn't make much sense. If some GPUs don't allocate separate
depth & stencil, it's still beneficial to clear the HiZ / HiS information
for only one of the two.
---
 src/mesa/state_tracker/st_cb_clear.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 137fac8..1e404a2 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -515,15 +515,6 @@ st_Clear(struct gl_context *ctx, GLbitfield mask)
       }
    }
 
-   /* Always clear depth and stencil together.
-    * This can only happen when the stencil writemask is not a full mask.
-    */
-   if (quad_buffers & PIPE_CLEAR_DEPTHSTENCIL &&
-       clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) {
-      quad_buffers |= clear_buffers & PIPE_CLEAR_DEPTHSTENCIL;
-      clear_buffers &= ~PIPE_CLEAR_DEPTHSTENCIL;
-   }
-
    /* Only use quad-based clearing for the renderbuffers which cannot
     * use pipe->clear. We want to always use pipe->clear for the other
     * renderbuffers, because it's likely to be faster.
-- 
2.1.4