From 91dddca26eca0c2e00bb2974099908bf26d34f43 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Wed, 13 May 2020 04:32:41 -0300
Subject: vk_rasterizer: Implement constant attributes

Constant attributes (in OpenGL known disabled attributes) are not
supported on Vulkan, even with extensions. To emulate this behavior we
return zero on reads from disabled vertex attributes in shader code.
This has no caching cost because attribute formats are not dynamic state
on Vulkan and we have to store it in the pipeline cache anyway.

- Fixes Animal Crossing: New Horizons terrain borders
---
 src/video_core/renderer_vulkan/vk_shader_decompiler.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/video_core/renderer_vulkan/vk_shader_decompiler.h')

diff --git a/src/video_core/renderer_vulkan/vk_shader_decompiler.h b/src/video_core/renderer_vulkan/vk_shader_decompiler.h
index f4c05ac3c..b7af26388 100644
--- a/src/video_core/renderer_vulkan/vk_shader_decompiler.h
+++ b/src/video_core/renderer_vulkan/vk_shader_decompiler.h
@@ -88,7 +88,8 @@ struct Specialization final {
     u32 shared_memory_size{};
 
     // Graphics specific
-    std::optional<float> point_size{};
+    std::optional<float> point_size;
+    std::bitset<Maxwell::NumVertexAttributes> enabled_attributes;
     std::array<Maxwell::VertexAttribute::Type, Maxwell::NumVertexAttributes> attribute_types{};
     bool ndc_minus_one_to_one{};
 };
-- 
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