Mesa (master): softpipe: fix clears to only clear specified color buffers.

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Module: Mesa
Branch: master
Commit: e77013fb7fd469bf39d54fd82f0f1e60b1b436a0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e77013fb7fd469bf39d54fd82f0f1e60b1b436a0

Author: Dave Airlie <airlied at redhat.com>
Date:   Tue Mar 26 15:25:18 2019 +1000

softpipe: fix clears to only clear specified color buffers.

This fixes piglit clearbuffer-mixed-format

Reviewed-by: Brian Paul <brianp at vmware.com>

---

 src/gallium/drivers/softpipe/sp_clear.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/softpipe/sp_clear.c b/src/gallium/drivers/softpipe/sp_clear.c
index ba04fd0aa87..d2626a24333 100644
--- a/src/gallium/drivers/softpipe/sp_clear.c
+++ b/src/gallium/drivers/softpipe/sp_clear.c
@@ -68,7 +68,8 @@ softpipe_clear(struct pipe_context *pipe, unsigned buffers,
 
    if (buffers & PIPE_CLEAR_COLOR) {
       for (i = 0; i < softpipe->framebuffer.nr_cbufs; i++) {
-         sp_tile_cache_clear(softpipe->cbuf_cache[i], color, 0);
+         if (buffers & (PIPE_CLEAR_COLOR0 << i))
+            sp_tile_cache_clear(softpipe->cbuf_cache[i], color, 0);
       }
    }