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-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_visitor.cpp12
1 files changed, 9 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index 522238759aa..7859fefe7ad 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -3668,7 +3668,7 @@ fs_visitor::emit_fb_writes()
brw_wm_prog_data *prog_data = (brw_wm_prog_data*) this->prog_data;
brw_wm_prog_key *key = (brw_wm_prog_key*) this->key;
- fs_inst *inst;
+ fs_inst *inst = NULL;
if (do_dual_src) {
this->current_annotation = ralloc_asprintf(this->mem_ctx,
"FB dual-source write");
@@ -3700,8 +3700,12 @@ fs_visitor::emit_fb_writes()
}
prog_data->dual_src_blend = true;
- } else if (key->nr_color_regions > 0) {
+ } else {
for (int target = 0; target < key->nr_color_regions; target++) {
+ /* Skip over outputs that weren't written. */
+ if (this->outputs[target].file == BAD_FILE)
+ continue;
+
this->current_annotation = ralloc_asprintf(this->mem_ctx,
"FB write target %d",
target);
@@ -3714,7 +3718,9 @@ fs_visitor::emit_fb_writes()
this->output_components[target]);
inst->target = target;
}
- } else {
+ }
+
+ if (inst == NULL) {
/* Even if there's no color buffers enabled, we still need to send
* alpha out the pipeline to our null renderbuffer to support
* alpha-testing, alpha-to-coverage, and so on.