spirv: Add fixed pipeline point size

src/shader_recompiler/backend/spirv/emit_context.cpp

@@ -495,7 +495,7 @@ void EmitContext::DefineOutputs(const Info& info) {
     if (info.stores_position || stage == Stage::VertexB) {
         output_position = DefineOutput(*this, F32[4], spv::BuiltIn::Position);
     }
-    if (info.stores_point_size) {
+    if (info.stores_point_size || profile.fixed_state_point_size) {
         if (stage == Stage::Fragment) {
             throw NotImplementedException("Storing PointSize in Fragment stage");
         }

src/shader_recompiler/backend/spirv/emit_spirv_special.cpp

@@ -17,6 +17,10 @@ void EmitPrologue(EmitContext& ctx) {
                 ctx.OpStore(generic_id, default_vector);
             }
         }
+        if (ctx.profile.fixed_state_point_size) {
+            const float point_size{*ctx.profile.fixed_state_point_size};
+            ctx.OpStore(ctx.output_point_size, ctx.Constant(ctx.F32[1], point_size));
+        }
     }
 }
 

src/shader_recompiler/profile.h

@@ -5,6 +5,7 @@
 #pragma once
 
 #include <array>
+#include <optional>
 
 #include "common/common_types.h"
 
@@ -41,6 +42,8 @@ struct Profile {
 
     std::array<AttributeType, 32> generic_input_types{};
     bool convert_depth_mode{};
+
+    std::optional<float> fixed_state_point_size;
 };
 
 } // namespace Shader

src/video_core/renderer_vulkan/vk_pipeline_cache.cpp

@@ -864,6 +864,9 @@ Shader::Profile PipelineCache::MakeProfile(const GraphicsPipelineCacheKey& key,
     Shader::Profile profile{base_profile};
     if (stage == Shader::Stage::VertexB) {
         profile.convert_depth_mode = key.state.ndc_minus_one_to_one != 0;
+        if (key.state.topology == Maxwell::PrimitiveTopology::Points) {
+            profile.fixed_state_point_size = Common::BitCast<float>(key.state.point_size);
+        }
         std::ranges::transform(key.state.attributes, profile.generic_input_types.begin(),
                                &CastAttributeType);
     }