[D3D12] Point sprite size fixes, point/line bits in PsParamGen

src/xenia/gpu/draw_util.h

@@ -25,6 +25,33 @@ namespace xe {
 namespace gpu {
 namespace draw_util {
 
+constexpr bool IsPrimitiveLine(bool vgt_output_path_is_tessellation_enable,
+                               xenos::PrimitiveType type) {
+  if (vgt_output_path_is_tessellation_enable &&
+      type == xenos::PrimitiveType::kLinePatch) {
+    // For patch primitive types, the major mode is always explicit, so just
+    // checking if VGT_OUTPUT_PATH_CNTL::path_select is kTessellationEnable is
+    // enough.
+    return true;
+  }
+  switch (type) {
+    case xenos::PrimitiveType::kLineList:
+    case xenos::PrimitiveType::kLineStrip:
+    case xenos::PrimitiveType::kLineLoop:
+    case xenos::PrimitiveType::k2DLineStrip:
+      return true;
+    default:
+      break;
+  }
+  return false;
+}
+
+inline bool IsPrimitiveLine(const RegisterFile& regs) {
+  return IsPrimitiveLine(regs.Get<reg::VGT_OUTPUT_PATH_CNTL>().path_select ==
+                             xenos::VGTOutputPath::kTessellationEnable,
+                         regs.Get<reg::VGT_DRAW_INITIATOR>().prim_type);
+}
+
 // Polygonal primitive types (not including points and lines) are rasterized as
 // triangles, have front and back faces, and also support face culling and fill
 // modes (polymode_front_ptype, polymode_back_ptype). Other primitive types are