[PATCH v2 1/5] vkd3d-shader/spirv: Handle signature element mask left shift in calculate_clip_or_cull_distance_mask().

[Conor McCarthy]

From: Conor McCarthy

In DXIL these masks can have a left shift.
---
 libs/vkd3d-shader/spirv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c
index d71f0a69..54c80a62 100644
--- a/libs/vkd3d-shader/spirv.c
+++ b/libs/vkd3d-shader/spirv.c
@@ -4764,13 +4764,16 @@ static bool is_dual_source_blending(const struct spirv_compiler *compiler)

static void calculate_clip_or_cull_distance_mask(const struct signature_element *e, uint32_t *mask)
 {
+    unsigned int write_mask;
+
     if (e->semantic_index >= sizeof(*mask) * CHAR_BIT / VKD3D_VEC4_SIZE)
     {
         FIXME("Invalid semantic index %u for clip/cull distance.\n", e->semantic_index);
         return;
     }

-    *mask |= (e->mask & VKD3DSP_WRITEMASK_ALL) << (VKD3D_VEC4_SIZE * e->semantic_index);
+    write_mask = e->mask >> vkd3d_write_mask_get_component_idx(e->mask);
+    *mask |= (write_mask & VKD3DSP_WRITEMASK_ALL) << (VKD3D_VEC4_SIZE * e->semantic_index);
 }

/* Emits arrayed SPIR-V built-in variables. */