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-rw-r--r--src/mesa/state_tracker/st_atom_blend.c2
-rw-r--r--src/mesa/state_tracker/st_cb_clear.c1
2 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_blend.c b/src/mesa/state_tracker/st_atom_blend.c
index 0d429dac460..10e9b6a38c4 100644
--- a/src/mesa/state_tracker/st_atom_blend.c
+++ b/src/mesa/state_tracker/st_atom_blend.c
@@ -201,6 +201,8 @@ st_update_blend( struct st_context *st )
memset(blend, 0, sizeof(*blend));
+ blend->max_rt = MAX2(1, num_cb) - 1;
+
if (num_cb > 1 &&
(blend_per_rt(st, num_cb) || colormask_per_rt(ctx, num_cb))) {
num_state = num_cb;
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 3cf4c79f083..b7d44d2c1b5 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -280,6 +280,7 @@ clear_with_quad(struct gl_context *ctx, unsigned clear_buffers)
int i;
blend.independent_blend_enable = num_buffers > 1;
+ blend.max_rt = num_buffers - 1;
for (i = 0; i < num_buffers; i++) {
if (!(clear_buffers & (PIPE_CLEAR_COLOR0 << i)))