1 files changed, 78 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/ValidateOutputs.cpp b/src/3rdparty/angle/src/compiler/translator/ValidateOutputs.cpp
new file mode 100644
index 0000000000..ac1c10d6b0
--- /dev/null
+++ b/src/3rdparty/angle/src/compiler/translator/ValidateOutputs.cpp
@@ -0,0 +1,78 @@
+//
+// Copyright (c) 2013 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/ValidateOutputs.h"
+#include "compiler/translator/InfoSink.h"
+#include "compiler/translator/InitializeParseContext.h"
+#include "compiler/translator/ParseContext.h"
+
+ValidateOutputs::ValidateOutputs(TInfoSinkBase& sink, int maxDrawBuffers)
+    : mSink(sink),
+      mMaxDrawBuffers(maxDrawBuffers),
+      mNumErrors(0),
+      mHasUnspecifiedOutputLocation(false)
+{
+}
+
+void ValidateOutputs::visitSymbol(TIntermSymbol *symbol)
+{
+    TString name = symbol->getSymbol();
+    TQualifier qualifier = symbol->getQualifier();
+
+    if (mVisitedSymbols.count(name) == 1)
+        return;
+
+    mVisitedSymbols.insert(name);
+
+    if (qualifier == EvqFragmentOut)
+    {
+        const TType &type = symbol->getType();
+        const int location = type.getLayoutQualifier().location;
+
+        if (mHasUnspecifiedOutputLocation)
+        {
+            error(symbol->getLine(), "must explicitly specify all locations when using multiple fragment outputs", name.c_str());
+        }
+        else if (location == -1)
+        {
+            mHasUnspecifiedOutputLocation = true;
+        }
+        else
+        {
+            OutputMap::iterator mapEntry = mOutputMap.find(location);
+            if (mapEntry == mOutputMap.end())
+            {
+                const int elementCount = type.isArray() ? type.getArraySize() : 1;
+                if (location + elementCount > mMaxDrawBuffers)
+                {
+                    error(symbol->getLine(), "output location must be < MAX_DRAW_BUFFERS", name.c_str());
+                }
+
+                for (int elementIndex = 0; elementIndex < elementCount; elementIndex++)
+                {
+                    const int offsetLocation = location + elementIndex;
+                    mOutputMap[offsetLocation] = symbol;
+                }
+            }
+            else
+            {
+                std::stringstream strstr;
+                strstr << "conflicting output locations with previously defined output '"
+                       << mapEntry->second->getSymbol() << "'";
+
+                error(symbol->getLine(), strstr.str().c_str(), name.c_str());
+            }
+        }
+    }
+}
+
+void ValidateOutputs::error(TSourceLoc loc, const char *reason, const char* token)
+{
+    mSink.prefix(EPrefixError);
+    mSink.location(loc);
+    mSink << "'" << token << "' : " << reason << "\n";
+    mNumErrors++;
+}