[PATCH vkd3d 1/7] vkd3d-shader: Implement SV_SampleIndex.

[Józef Kucia]

From: Józef Kucia

Signed-off-by: Józef Kucia 
---
 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 98d7a9313f0e..63a1a0e0b7c2 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}},
 };