=?UTF-8?Q?J=C3=B3zef=20Kucia=20?=: vkd3d-shader: Implement SV_SampleIndex.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 1f4e6dc60330eee49567a920db682075d9bc0288
URL:    https://source.winehq.org/git/vkd3d.git/?a=commit;h=1f4e6dc60330eee49567a920db682075d9bc0288

Author: Józef Kucia <jkucia at codeweavers.com>
Date:   Mon Oct  8 15:40:15 2018 +0200

vkd3d-shader: Implement SV_SampleIndex.

Signed-off-by: Józef Kucia <jkucia at codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 libs/vkd3d-shader/spirv.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c
index 98d7a93..63a1a0e 100644
--- a/libs/vkd3d-shader/spirv.c
+++ b/libs/vkd3d-shader/spirv.c
@@ -2958,6 +2958,14 @@ static uint32_t sv_front_face_fixup(struct vkd3d_dxbc_compiler *compiler,
     return vkd3d_dxbc_compiler_emit_bool_to_int(compiler, 1, front_facing_id);
 }
 
+static uint32_t sv_sample_index(struct vkd3d_dxbc_compiler *compiler, uint32_t id)
+{
+    struct vkd3d_spirv_builder *builder = &compiler->spirv_builder;
+
+    vkd3d_spirv_enable_capability(builder, SpvCapabilitySampleRateShading);
+    return id;
+}
+
 struct vkd3d_spirv_builtin
 {
     enum vkd3d_component_type component_type;
@@ -2986,6 +2994,8 @@ vkd3d_system_value_builtins[] =
 
     {VKD3D_SIV_IS_FRONT_FACE, {VKD3D_TYPE_BOOL, 1, SpvBuiltInFrontFacing, sv_front_face_fixup}},
 
+    {VKD3D_SIV_SAMPLE_INDEX, {VKD3D_TYPE_UINT, 1, SpvBuiltInSampleId, sv_sample_index}},
+
     {VKD3D_SIV_CLIP_DISTANCE, {VKD3D_TYPE_FLOAT, 1, SpvBuiltInClipDistance, NULL, true}},
     {VKD3D_SIV_CULL_DISTANCE, {VKD3D_TYPE_FLOAT, 1, SpvBuiltInCullDistance, NULL, true}},
 };