iris: Enable ARB_shader_draw_parameters support

Additional VERTEX_ELEMENT_STATE are used to store basevertex and
baseinstance and drawid updating the DWordLength of the
3DSTATE_VERTEX_ELEMENTS command.

This passes all piglit tests for spec.*draw_parameters.* tests
and VK-GL-CTS KHR-GL45.shader_draw_parameters_tests.* tests.

Now we only mark a dirty_update when parameters are changed or
when we have an indirect draw.

We enable PIPE_CAP_DRAW_PARAMETERS on Iris.

There is no edge flag support in the Vertex Elements setup.

Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/gallium/drivers/iris/iris_program.c b/src/gallium/drivers/iris/iris_program.c
index 7f92c4a7998..28864c4f016 100644
--- a/src/gallium/drivers/iris/iris_program.c
+++ b/src/gallium/drivers/iris/iris_program.c
@@ -617,6 +617,24 @@ iris_update_compiled_vs(struct iris_context *ice)
                           IRIS_DIRTY_BINDINGS_VS |
                           IRIS_DIRTY_CONSTANTS_VS |
                           IRIS_DIRTY_VF_SGVS;
+      const struct brw_vs_prog_data *vs_prog_data =
+            (void *) shader->prog_data;
+      const bool uses_draw_params = vs_prog_data->uses_firstvertex ||
+                                    vs_prog_data->uses_baseinstance;
+      const bool uses_derived_draw_params = vs_prog_data->uses_drawid ||
+                                            vs_prog_data->uses_is_indexed_draw;
+      const bool needs_sgvs_element = uses_draw_params ||
+                                      vs_prog_data->uses_instanceid ||
+                                      vs_prog_data->uses_vertexid;
+
+      if (ice->state.vs_uses_draw_params != uses_draw_params ||
+          ice->state.vs_uses_derived_draw_params != uses_derived_draw_params) {
+         ice->state.dirty |= IRIS_DIRTY_VERTEX_BUFFERS |
+                             IRIS_DIRTY_VERTEX_ELEMENTS;
+      }
+      ice->state.vs_uses_draw_params = uses_draw_params;
+      ice->state.vs_uses_derived_draw_params = uses_derived_draw_params;
+      ice->state.vs_needs_sgvs_element = needs_sgvs_element;
    }
 }