Implement intput and output fixed fnc textures

src/shader_recompiler/backend/spirv/emit_context.cpp

@@ -1206,10 +1206,12 @@ void EmitContext::DefineInputs(const IR::Program& program) {
         Decorate(id, spv::Decoration::Location, static_cast<u32>(11));
         input_front_color = id;
     }
-    if (loads.AnyComponent(IR::Attribute::FixedFncTexture0S)) {
-        const Id id{DefineInput(*this, F32[4], true)};
-        Decorate(id, spv::Decoration::Location, static_cast<u32>(12));
-        input_fixed_fnc_texture = id;
+    for (size_t index = 0; index < IR::NUM_FIXEDFNCTEXTURE; ++index) {
+        if (loads.AnyComponent(IR::Attribute::FixedFncTexture0S + index * 4)) {
+            const Id id{DefineInput(*this, F32[4], true)};
+            Decorate(id, spv::Decoration::Location, static_cast<u32>(12));
+            input_fixed_fnc_textures[index] = id;
+        }
     }
     if (loads[IR::Attribute::InstanceId]) {
         if (profile.support_vertex_instance_id) {
@@ -1292,11 +1294,6 @@ void EmitContext::DefineOutputs(const IR::Program& program) {
     if (info.stores.AnyComponent(IR::Attribute::PositionX) || stage == Stage::VertexB) {
         output_position = DefineOutput(*this, F32[4], invocations, spv::BuiltIn::Position);
     }
-    if (info.stores.AnyComponent(IR::Attribute::ColorFrontDiffuseR) || stage == Stage::VertexB) {
-        const Id id{DefineOutput(*this, F32[4], invocations)};
-        Decorate(id, spv::Decoration::Location, static_cast<u32>(11));
-        output_front_color = id;
-    }
     if (info.stores[IR::Attribute::PointSize] || runtime_info.fixed_state_point_size) {
         if (stage == Stage::Fragment) {
             throw NotImplementedException("Storing PointSize in fragment stage");
@@ -1328,13 +1325,18 @@ void EmitContext::DefineOutputs(const IR::Program& program) {
         viewport_mask = DefineOutput(*this, TypeArray(U32[1], Const(1u)), std::nullopt,
                                      spv::BuiltIn::ViewportMaskNV);
     }
-
-    if (info.stores.AnyComponent(IR::Attribute::FixedFncTexture0S)) {
+    if (info.stores.AnyComponent(IR::Attribute::ColorFrontDiffuseR) || stage == Stage::VertexB) {
         const Id id{DefineOutput(*this, F32[4], invocations)};
-        Decorate(id, spv::Decoration::Location, static_cast<u32>(12));
-        output_fixed_fnc_texture = id;
+        Decorate(id, spv::Decoration::Location, static_cast<u32>(11));
+        output_front_color = id;
+    }
+    for (size_t index = 0; index < IR::NUM_FIXEDFNCTEXTURE; ++index) {
+        if (info.stores.AnyComponent(IR::Attribute::FixedFncTexture0S + index * 4)) {
+            const Id id{DefineOutput(*this, F32[4], invocations)};
+            Decorate(id, spv::Decoration::Location, static_cast<u32>(12));
+            output_fixed_fnc_textures[index] = id;
+        }
     }
-
     for (size_t index = 0; index < IR::NUM_GENERICS; ++index) {
         if (info.stores.Generic(index)) {
             DefineGenericOutput(*this, index, invocations);

src/shader_recompiler/backend/spirv/emit_context.h

@@ -269,13 +269,13 @@ public:
 
     Id input_position{};
     Id input_front_color{};
-    Id input_fixed_fnc_texture{};
+    std::array<Id, 10> input_fixed_fnc_textures{};
     std::array<Id, 32> input_generics{};
 
     Id output_point_size{};
     Id output_position{};
     Id output_front_color{};
-    Id output_fixed_fnc_texture;
+    std::array<Id, 10> output_fixed_fnc_textures{};
     std::array<std::array<GenericElementInfo, 4>, 32> output_generics{};
 
     Id output_tess_level_outer{};

src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp

@@ -78,7 +78,8 @@ std::optional<OutAttr> OutputAttrPointer(EmitContext& ctx, IR::Attribute attr) {
         const u32 index{IR::FixedFncTextureAttributeIndex(attr)};
         const u32 element{IR::FixedFncTextureAttributeElement(attr)};
         const Id element_id{ctx.Const(element)};
-        return OutputAccessChain(ctx, ctx.output_f32, ctx.output_fixed_fnc_texture, element_id);
+        return OutputAccessChain(ctx, ctx.output_f32, ctx.output_fixed_fnc_textures[index],
+                                 element_id);
     }
     switch (attr) {
     case IR::Attribute::PointSize:
@@ -323,8 +324,9 @@ Id EmitGetAttribute(EmitContext& ctx, IR::Attribute attr, Id vertex) {
     }
     if (attr >= IR::Attribute::FixedFncTexture0S && attr <= IR::Attribute::FixedFncTexture9Q) {
         const u32 index{IR::FixedFncTextureAttributeIndex(attr)};
-        return ctx.OpLoad(ctx.F32[1], AttrPointer(ctx, ctx.input_f32, vertex, ctx.input_fixed_fnc_texture,
-                                                  ctx.Const(element)));
+        return ctx.OpLoad(ctx.F32[1],
+                          AttrPointer(ctx, ctx.input_f32, vertex,
+                                      ctx.input_fixed_fnc_textures[index], ctx.Const(element)));
     }
     switch (attr) {
     case IR::Attribute::PrimitiveId:

src/shader_recompiler/frontend/ir/attribute.h

@@ -225,6 +225,8 @@ enum class Attribute : u64 {
 constexpr size_t NUM_FIXEDFNCTEXTURE = 10;
 constexpr size_t NUM_GENERICS = 32;
 
+[[nodiscard]] bool IsFixedFncTexture(Attribute attribute);
+
 [[nodiscard]] u32 FixedFncTextureAttributeIndex(Attribute attribute);
 
 [[nodiscard]] u32 FixedFncTextureAttributeElement(Attribute attribute);