shader_recompiler: Implement guest barycentrics (#3245)

* shader_recompiler: Implement guest barycentrics

* Review comments and some cleanup

src/shader_recompiler/info.h

@@ -1,5 +1,6 @@
 // SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
+
 #pragma once
 
 #include <span>
@@ -135,6 +136,16 @@ struct PushData {
 static_assert(sizeof(PushData) <= 128,
               "PushData size is greater than minimum size guaranteed by Vulkan spec");
 
+enum class Qualifier : u8 {
+    None,
+    Smooth,
+    NoPerspective,
+    PerVertex,
+    Flat,
+    Centroid,
+    Sample,
+};
+
 /**
  * Contains general information generated by the shader recompiler for an input program.
  */
@@ -194,7 +205,11 @@ struct Info {
     PersistentSrtInfo srt_info;
     std::vector<u32> flattened_ud_buf;
 
-    std::array<IR::Interpolation, 32> interp_qualifiers{};
+    struct Interpolation {
+        Qualifier primary;
+        Qualifier auxiliary;
+    };
+    std::array<Interpolation, IR::NumParams> fs_interpolation{};
 
     IR::ScalarReg tess_consts_ptr_base = IR::ScalarReg::Max;
     s32 tess_consts_dword_offset = -1;
@@ -209,8 +224,6 @@ struct Info {
     bool has_discard{};
     bool has_image_gather{};
     bool has_image_query{};
-    bool has_perspective_interp{};
-    bool has_linear_interp{};
     bool uses_buffer_atomic_float_min_max{};
     bool uses_image_atomic_float_min_max{};
     bool uses_lane_id{};