[Vulkan] PsParamGen

src/xenia/gpu/vulkan/vulkan_command_processor.cc

@@ -2336,7 +2336,8 @@ bool VulkanCommandProcessor::IssueDraw(xenos::PrimitiveType prim_type,
                      normalized_depth_control);
 
   // Update system constants before uploading them.
-  UpdateSystemConstantValues(primitive_processing_result.host_index_endian,
+  UpdateSystemConstantValues(primitive_polygonal,
+                             primitive_processing_result.host_index_endian,
                              viewport_info, used_texture_mask);
 
   // Update uniform buffers and descriptor sets after binding the pipeline with
@@ -3257,14 +3258,15 @@ void VulkanCommandProcessor::UpdateDynamicState(
 }
 
 void VulkanCommandProcessor::UpdateSystemConstantValues(
-    xenos::Endian index_endian, const draw_util::ViewportInfo& viewport_info,
-    uint32_t used_texture_mask) {
+    bool primitive_polygonal, xenos::Endian index_endian,
+    const draw_util::ViewportInfo& viewport_info, uint32_t used_texture_mask) {
 #if XE_UI_VULKAN_FINE_GRAINED_DRAW_SCOPES
   SCOPE_profile_cpu_f("gpu");
 #endif  // XE_UI_VULKAN_FINE_GRAINED_DRAW_SCOPES
 
   const RegisterFile& regs = *register_file_;
   auto pa_cl_vte_cntl = regs.Get<reg::PA_CL_VTE_CNTL>();
+  auto vgt_draw_initiator = regs.Get<reg::VGT_DRAW_INITIATOR>();
   int32_t vgt_indx_offset = int32_t(regs[XE_GPU_REG_VGT_INDX_OFFSET].u32);
 
   // Get the color info register values for each render target.
@@ -3295,6 +3297,14 @@ void VulkanCommandProcessor::UpdateSystemConstantValues(
   if (pa_cl_vte_cntl.vtx_w0_fmt) {
     flags |= SpirvShaderTranslator::kSysFlag_WNotReciprocal;
   }
+  // Whether the primitive is polygonal, and gl_FrontFacing matters.
+  if (primitive_polygonal) {
+    flags |= SpirvShaderTranslator::kSysFlag_PrimitivePolygonal;
+  }
+  // Primitive type.
+  if (draw_util::IsPrimitiveLine(regs)) {
+    flags |= SpirvShaderTranslator::kSysFlag_PrimitiveLine;
+  }
   // Gamma writing.
   // TODO(Triang3l): Gamma as sRGB check.
   for (uint32_t i = 0; i < xenos::kMaxColorRenderTargets; ++i) {

src/xenia/gpu/vulkan/vulkan_command_processor.h

@@ -449,7 +449,8 @@ class VulkanCommandProcessor : public CommandProcessor {
   void UpdateDynamicState(const draw_util::ViewportInfo& viewport_info,
                           bool primitive_polygonal,
                           reg::RB_DEPTHCONTROL normalized_depth_control);
-  void UpdateSystemConstantValues(xenos::Endian index_endian,
+  void UpdateSystemConstantValues(bool primitive_polygonal,
+                                  xenos::Endian index_endian,
                                   const draw_util::ViewportInfo& viewport_info,
                                   uint32_t used_texture_mask);
   bool UpdateBindings(const VulkanShader* vertex_shader,

src/xenia/gpu/vulkan/vulkan_pipeline_cache.cc

@@ -134,13 +134,27 @@ VulkanPipelineCache::GetCurrentPixelShaderModification(
   assert_true(shader.type() == xenos::ShaderType::kPixel);
   assert_true(shader.is_ucode_analyzed());
   const auto& regs = register_file_;
-
   auto sq_program_cntl = regs.Get<reg::SQ_PROGRAM_CNTL>();
+
   SpirvShaderTranslator::Modification modification(
       shader_translator_->GetDefaultPixelShaderModification(
           shader.GetDynamicAddressableRegisterCount(
               sq_program_cntl.ps_num_reg)));
 
+  if (sq_program_cntl.param_gen) {
+    auto sq_context_misc = regs.Get<reg::SQ_CONTEXT_MISC>();
+    if (sq_context_misc.param_gen_pos <
+        std::min(std::max(modification.pixel.dynamic_addressable_register_count,
+                          shader.register_static_address_bound()),
+                 xenos::kMaxInterpolators)) {
+      modification.pixel.param_gen_enable = 1;
+      modification.pixel.param_gen_interpolator = sq_context_misc.param_gen_pos;
+      auto vgt_draw_initiator = regs.Get<reg::VGT_DRAW_INITIATOR>();
+      modification.pixel.param_gen_point = uint32_t(
+          vgt_draw_initiator.prim_type == xenos::PrimitiveType::kPointList);
+    }
+  }
+
   return modification;
 }