1 files changed, 43 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/compiler/translator/tree_util/ReplaceClipCullDistanceVariable.h b/gfx/angle/checkout/src/compiler/translator/tree_util/ReplaceClipCullDistanceVariable.h
new file mode 100644
index 0000000000..93d19f9fe2
--- /dev/null
+++ b/gfx/angle/checkout/src/compiler/translator/tree_util/ReplaceClipCullDistanceVariable.h
@@ -0,0 +1,43 @@
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// ReplaceClipCullDistanceVariable.h: Find any references to gl_ClipDistance or gl_CullDistance and
+// replace it with ANGLEClipDistance or ANGLECullDistance.
+//
+
+#ifndef COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_
+#define COMPILER_TRANSLATOR_TREEUTIL_REPLACECLIPCULLDISTANCEVARIABLE_H_
+
+#include "GLSLANG/ShaderLang.h"
+#include "common/angleutils.h"
+
+namespace sh
+{
+
+struct InterfaceBlock;
+class TCompiler;
+class TIntermBlock;
+class TSymbolTable;
+class TIntermTyped;
+
+// Replace every gl_ClipDistance assignment with assignment to "ANGLEClipDistance",
+// then at the end of shader re-assign the values of this global variable to gl_ClipDistance.
+// This to solve some complex usages such as user passing gl_ClipDistance as output reference
+// to a function.
+// Furthermore, at the end shader, some disabled gl_ClipDistance[i] can be skipped from the
+// assignment.
+[[nodiscard]] bool ReplaceClipDistanceAssignments(TCompiler *compiler,
+                                                  TIntermBlock *root,
+                                                  TSymbolTable *symbolTable,
+                                                  const GLenum shaderType,
+                                                  const TIntermTyped *clipDistanceEnableFlags);
+
+[[nodiscard]] bool ReplaceCullDistanceAssignments(TCompiler *compiler,
+                                                  TIntermBlock *root,
+                                                  TSymbolTable *symbolTable,
+                                                  const GLenum shaderType);
+}  // namespace sh
+
+#endif