shader: Implement tessellation shaders, polygon mode and invocation id

1 files changed, 28 insertions, 0 deletions

diff --git a/src/shader_recompiler/frontend/ir/patch.cpp b/src/shader_recompiler/frontend/ir/patch.cpp
new file mode 100644
index 000000000..1f770bc48
--- /dev/null
+++ b/src/shader_recompiler/frontend/ir/patch.cpp
@@ -0,0 +1,28 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "shader_recompiler/frontend/ir/patch.h"
+#include "shader_recompiler/exception.h"
+
+namespace Shader::IR {
+
+bool IsGeneric(Patch patch) noexcept {
+    return patch >= Patch::Component0 && patch <= Patch::Component119;
+}
+
+u32 GenericPatchIndex(Patch patch) {
+    if (!IsGeneric(patch)) {
+        throw InvalidArgument("Patch {} is not generic", patch);
+    }
+    return (static_cast<u32>(patch) - static_cast<u32>(Patch::Component0)) / 4;
+}
+
+u32 GenericPatchElement(Patch patch) {
+    if (!IsGeneric(patch)) {
+        throw InvalidArgument("Patch {} is not generic", patch);
+    }
+    return (static_cast<u32>(patch) - static_cast<u32>(Patch::Component0)) % 4;
+}
+
+} // namespace Shader::IR