[Mesa-dev] [PATCH 2/2] anv/gen9: expose VK_EXT_post_depth_coverage

[Yunchao He]

From: Ilia Mirkin <imirkin at alum.mit.edu>

Note that the use of ICMS_INNER_CONSERVATIVE disagrees with the GL driver.
Perhaps it's more performant than ICMS_NORMAL and is otherwise permitted?
Not sure, so I left it as-is.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 src/intel/vulkan/anv_extensions.py |  1 +
 src/intel/vulkan/anv_pipeline.c    |  1 +
 src/intel/vulkan/genX_pipeline.c   | 10 ++++++++--
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/intel/vulkan/anv_extensions.py b/src/intel/vulkan/anv_extensions.py
index adc1d75898..ea837744b4 100644
--- a/src/intel/vulkan/anv_extensions.py
+++ b/src/intel/vulkan/anv_extensions.py
@@ -124,6 +124,7 @@ EXTENSIONS = [
     Extension('VK_EXT_shader_viewport_index_layer',       1, True),
     Extension('VK_EXT_shader_stencil_export',             1, 'device->info.gen >= 9'),
     Extension('VK_EXT_vertex_attribute_divisor',          2, True),
+    Extension('VK_EXT_post_depth_coverage',               1, 'device->info.gen >= 9'),
 ]
 
 class VkVersion:
diff --git a/src/intel/vulkan/anv_pipeline.c b/src/intel/vulkan/anv_pipeline.c
index 95a686f783..e91c146aad 100644
--- a/src/intel/vulkan/anv_pipeline.c
+++ b/src/intel/vulkan/anv_pipeline.c
@@ -155,6 +155,7 @@ anv_shader_compile_to_nir(struct anv_pipeline *pipeline,
          .subgroup_vote = true,
          .stencil_export = device->instance->physicalDevice.info.gen >= 9,
          .storage_8bit = device->instance->physicalDevice.info.gen >= 8,
+         .post_depth_coverage = device->instance->physicalDevice.info.gen >= 9,
       },
    };
 
diff --git a/src/intel/vulkan/genX_pipeline.c b/src/intel/vulkan/genX_pipeline.c
index 0821d71c9f..6f6793e122 100644
--- a/src/intel/vulkan/genX_pipeline.c
+++ b/src/intel/vulkan/genX_pipeline.c
@@ -1617,8 +1617,14 @@ emit_3dstate_ps_extra(struct anv_pipeline *pipeline,
 #if GEN_GEN >= 9
       ps.PixelShaderComputesStencil = wm_prog_data->computed_stencil;
       ps.PixelShaderPullsBary    = wm_prog_data->pulls_bary;
-      ps.InputCoverageMaskState  = wm_prog_data->uses_sample_mask ?
-                                   ICMS_INNER_CONSERVATIVE : ICMS_NONE;
+
+      ps.InputCoverageMaskState  = ICMS_NONE;
+      if (wm_prog_data->uses_sample_mask) {
+         if (wm_prog_data->post_depth_coverage)
+            ps.InputCoverageMaskState  = ICMS_DEPTH_COVERAGE;
+         else
+            ps.InputCoverageMaskState  = ICMS_INNER_CONSERVATIVE;
+      }
 #else
       ps.PixelShaderUsesInputCoverageMask = wm_prog_data->uses_sample_mask;
 #endif
-- 
2.17.1