shader: Rework varyings and implement passthrough geometry shaders

Put all varyings into a single std::bitset with helpers to access it.

Implement passthrough geometry shaders using host's.

2 files changed, 7 insertions, 0 deletions

diff --git a/src/shader_recompiler/frontend/ir/attribute.h b/src/shader_recompiler/frontend/ir/attribute.h
index 8bf2ddf30..ca1199494 100644
--- a/src/shader_recompiler/frontend/ir/attribute.h
+++ b/src/shader_recompiler/frontend/ir/attribute.h
@@ -222,6 +222,8 @@ enum class Attribute : u64 {
     FrontFace = 255,
 };
 
+constexpr size_t NUM_GENERICS = 32;
+
 [[nodiscard]] bool IsGeneric(Attribute attribute) noexcept;
 
 [[nodiscard]] u32 GenericAttributeIndex(Attribute attribute);
@@ -230,6 +232,10 @@ enum class Attribute : u64 {
 
 [[nodiscard]] std::string NameOf(Attribute attribute);
 
+[[nodiscard]] constexpr IR::Attribute operator+(IR::Attribute attribute, size_t value) noexcept {
+    return static_cast<IR::Attribute>(static_cast<size_t>(attribute) + value);
+}
+
 } // namespace Shader::IR
 
 template <>
diff --git a/src/shader_recompiler/frontend/ir/program.h b/src/shader_recompiler/frontend/ir/program.h
index 9ede5b48d..ebcaa8bc2 100644
--- a/src/shader_recompiler/frontend/ir/program.h
+++ b/src/shader_recompiler/frontend/ir/program.h
@@ -27,6 +27,7 @@ struct Program {
     u32 invocations{};
     u32 local_memory_size{};
     u32 shared_memory_size{};
+    bool is_geometry_passthrough{};
 };
 
 [[nodiscard]] std::string DumpProgram(const Program& program);