mesa/st: add support for ARB_sample_shading

Signed-off-by: Ilia Mirkin <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Roland Scheidegger <[email protected]>

1 files changed, 13 insertions, 8 deletions

diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
index 2f0ec32f554..f9887a2c440 100644
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -682,6 +682,7 @@ st_translate_fragment_program(struct st_context *st,
       /* handle remaining outputs (color) */
       for (attr = 0; attr < FRAG_RESULT_MAX; attr++) {
          if (outputsWritten & BITFIELD64_BIT(attr)) {
+            int semantic = TGSI_SEMANTIC_COLOR;
             switch (attr) {
             case FRAG_RESULT_DEPTH:
             case FRAG_RESULT_STENCIL:
@@ -689,17 +690,21 @@ st_translate_fragment_program(struct st_context *st,
                assert(0);
                break;
             case FRAG_RESULT_COLOR:
-               write_all = GL_TRUE; /* fallthrough */
-            default:
-               assert(attr == FRAG_RESULT_COLOR ||
-                      (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
-               fs_output_semantic_name[fs_num_outputs] = TGSI_SEMANTIC_COLOR;
-               fs_output_semantic_index[fs_num_outputs] = numColors;
-               outputMapping[attr] = fs_num_outputs;
-               numColors++;
+               write_all = GL_TRUE;
+               break;
+            case FRAG_RESULT_SAMPLE_MASK:
+               semantic = TGSI_SEMANTIC_SAMPLEMASK;
                break;
             }
 
+            assert(attr == FRAG_RESULT_COLOR ||
+                   attr == FRAG_RESULT_SAMPLE_MASK ||
+                   (FRAG_RESULT_DATA0 <= attr && attr < FRAG_RESULT_MAX));
+            fs_output_semantic_name[fs_num_outputs] = semantic;
+            fs_output_semantic_index[fs_num_outputs] = numColors;
+            outputMapping[attr] = fs_num_outputs;
+            numColors++;
+
             fs_num_outputs++;
          }
       }