diff options
Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/RemoveInvariantDeclaration.cpp')
-rw-r--r-- | src/3rdparty/angle/src/compiler/translator/RemoveInvariantDeclaration.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/RemoveInvariantDeclaration.cpp b/src/3rdparty/angle/src/compiler/translator/RemoveInvariantDeclaration.cpp new file mode 100644 index 0000000000..4b533dc7b5 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/RemoveInvariantDeclaration.cpp @@ -0,0 +1,43 @@ +// +// Copyright (c) 2016 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. +// + +#include "compiler/translator/RemoveInvariantDeclaration.h" + +#include "compiler/translator/IntermTraverse.h" + +namespace sh +{ + +namespace +{ + +// An AST traverser that removes invariant declaration for input in fragment shader +// when GLSL >= 4.20 and for output in vertex shader when GLSL < 4.2. +class RemoveInvariantDeclarationTraverser : public TIntermTraverser +{ + public: + RemoveInvariantDeclarationTraverser() : TIntermTraverser(true, false, false) {} + + private: + bool visitInvariantDeclaration(Visit visit, TIntermInvariantDeclaration *node) override + { + TIntermSequence emptyReplacement; + mMultiReplacements.push_back( + NodeReplaceWithMultipleEntry(getParentNode()->getAsBlock(), node, emptyReplacement)); + return false; + } +}; + +} // anonymous namespace + +void RemoveInvariantDeclaration(TIntermNode *root) +{ + RemoveInvariantDeclarationTraverser traverser; + root->traverse(&traverser); + traverser.updateTree(); +} + +} // namespace sh |