Add shader translator support for OVR_multiview
The OVR_multiview and OVR_multiview2 extensions add gl_ViewID_OVR to
shaders. gl_ViewID_OVR can be translated either as is in GLSL output
or as a uniform by setting the SH_TRANSLATE_VIEWID_OVR_AS_UNIFORM
compiler flag.
If WebGL output is selected, the shaders will be validated according
to proposed rules in the WEBGL_multiview spec.
BUG=angleproject:1669
TEST=angle_unittests
Change-Id: I19ea3a6c8b4edb78be03f1a50a96bfef018870d0
Reviewed-on: https://chromium-review.googlesource.com/422848
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
diff --git a/src/compiler/translator/FindSymbolNode.cpp b/src/compiler/translator/FindSymbolNode.cpp
new file mode 100644
index 0000000..87fb9d5
--- /dev/null
+++ b/src/compiler/translator/FindSymbolNode.cpp
@@ -0,0 +1,58 @@
+//
+// Copyright (c) 2015 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.
+//
+// FindSymbol.cpp:
+// Utility for finding a symbol node inside an AST tree.
+
+#include "compiler/translator/FindSymbolNode.h"
+
+#include "compiler/translator/IntermNode.h"
+
+namespace sh
+{
+
+namespace
+{
+
+class SymbolFinder : public TIntermTraverser
+{
+ public:
+ SymbolFinder(const TString &symbolName, TBasicType basicType)
+ : TIntermTraverser(true, false, false),
+ mSymbolName(symbolName),
+ mNodeFound(nullptr),
+ mBasicType(basicType)
+ {
+ }
+
+ void visitSymbol(TIntermSymbol *node)
+ {
+ if (node->getBasicType() == mBasicType && node->getSymbol() == mSymbolName)
+ {
+ mNodeFound = node;
+ }
+ }
+
+ bool isFound() const { return mNodeFound != nullptr; }
+ const TIntermSymbol *getNode() const { return mNodeFound; }
+
+ private:
+ TString mSymbolName;
+ TIntermSymbol *mNodeFound;
+ TBasicType mBasicType;
+};
+
+} // anonymous namespace
+
+const TIntermSymbol *FindSymbolNode(TIntermNode *root,
+ const TString &symbolName,
+ TBasicType basicType)
+{
+ SymbolFinder finder(symbolName, basicType);
+ root->traverse(&finder);
+ return finder.getNode();
+}
+
+} // namespace sh