1 files changed, 56 insertions, 0 deletions
diff --git a/src/shader_recompiler/backend/spirv/emit_context.cpp b/src/shader_recompiler/backend/spirv/emit_context.cpp
index 2d29d8c14..2885e6799 100644
--- a/src/shader_recompiler/backend/spirv/emit_context.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_context.cpp
@@ -15,6 +15,8 @@
 
 namespace Shader::Backend::SPIRV {
 namespace {
+constexpr size_t NUM_FIXEDFNCTEXTURE = 10;
+
 enum class Operation {
     Increment,
     Decrement,
@@ -427,6 +429,16 @@ Id DescType(EmitContext& ctx, Id sampled_type, Id pointer_type, u32 count) {
         return pointer_type;
     }
 }
+
+size_t FindNextUnusedLocation(const std::bitset<IR::NUM_GENERICS>& used_locations,
+                              size_t start_offset) {
+    for (size_t location = start_offset; location < used_locations.size(); ++location) {
+        if (!used_locations.test(location)) {
+            return location;
+        }
+    }
+    throw RuntimeError("Unable to get an unused location for legacy attribute");
+}
 } // Anonymous namespace
 
 void VectorTypes::Define(Sirit::Module& sirit_ctx, Id base_type, std::string_view name) {
@@ -1227,6 +1239,7 @@ void EmitContext::DefineInputs(const IR::Program& program) {
         loads[IR::Attribute::TessellationEvaluationPointV]) {
         tess_coord = DefineInput(*this, F32[3], false, spv::BuiltIn::TessCoord);
     }
+    std::bitset<IR::NUM_GENERICS> used_locations{};
     for (size_t index = 0; index < IR::NUM_GENERICS; ++index) {
         const AttributeType input_type{runtime_info.generic_input_types[index]};
         if (!runtime_info.previous_stage_stores.Generic(index)) {
@@ -1238,6 +1251,7 @@ void EmitContext::DefineInputs(const IR::Program& program) {
         if (input_type == AttributeType::Disabled) {
             continue;
         }
+        used_locations.set(index);
         const Id type{GetAttributeType(*this, input_type)};
         const Id id{DefineInput(*this, type, true)};
         Decorate(id, spv::Decoration::Location, static_cast<u32>(index));
@@ -1263,6 +1277,26 @@ void EmitContext::DefineInputs(const IR::Program& program) {
             break;
         }
     }
+    size_t previous_unused_location = 0;
+    if (loads.AnyComponent(IR::Attribute::ColorFrontDiffuseR)) {
+        const size_t location = FindNextUnusedLocation(used_locations, previous_unused_location);
+        previous_unused_location = location;
+        used_locations.set(location);
+        const Id id{DefineInput(*this, F32[4], true)};
+        Decorate(id, spv::Decoration::Location, location);
+        input_front_color = id;
+    }
+    for (size_t index = 0; index < NUM_FIXEDFNCTEXTURE; ++index) {
+        if (loads.AnyComponent(IR::Attribute::FixedFncTexture0S + index * 4)) {
+            const size_t location =
+                FindNextUnusedLocation(used_locations, previous_unused_location);
+            previous_unused_location = location;
+            used_locations.set(location);
+            const Id id{DefineInput(*this, F32[4], true)};
+            Decorate(id, spv::Decoration::Location, location);
+            input_fixed_fnc_textures[index] = id;
+        }
+    }
     if (stage == Stage::TessellationEval) {
         for (size_t index = 0; index < info.uses_patches.size(); ++index) {
             if (!info.uses_patches[index]) {
@@ -1313,9 +1347,31 @@ void EmitContext::DefineOutputs(const IR::Program& program) {
         viewport_mask = DefineOutput(*this, TypeArray(U32[1], Const(1u)), std::nullopt,
                                      spv::BuiltIn::ViewportMaskNV);
     }
+    std::bitset<IR::NUM_GENERICS> used_locations{};
     for (size_t index = 0; index < IR::NUM_GENERICS; ++index) {
         if (info.stores.Generic(index)) {
             DefineGenericOutput(*this, index, invocations);
+            used_locations.set(index);
+        }
+    }
+    size_t previous_unused_location = 0;
+    if (info.stores.AnyComponent(IR::Attribute::ColorFrontDiffuseR)) {
+        const size_t location = FindNextUnusedLocation(used_locations, previous_unused_location);
+        previous_unused_location = location;
+        used_locations.set(location);
+        const Id id{DefineOutput(*this, F32[4], invocations)};
+        Decorate(id, spv::Decoration::Location, static_cast<u32>(location));
+        output_front_color = id;
+    }
+    for (size_t index = 0; index < NUM_FIXEDFNCTEXTURE; ++index) {
+        if (info.stores.AnyComponent(IR::Attribute::FixedFncTexture0S + index * 4)) {
+            const size_t location =
+                FindNextUnusedLocation(used_locations, previous_unused_location);
+            previous_unused_location = location;
+            used_locations.set(location);
+            const Id id{DefineOutput(*this, F32[4], invocations)};
+            Decorate(id, spv::Decoration::Location, location);
+            output_fixed_fnc_textures[index] = id;
         }
     }
     switch (stage) {