1 files changed, 64 insertions, 0 deletions
diff --git a/chromium/third_party/angle/src/compiler/translator/TranslatorGLSL.cpp b/chromium/third_party/angle/src/compiler/translator/TranslatorGLSL.cpp
new file mode 100644
index 00000000000..749d8377f0c
--- /dev/null
+++ b/chromium/third_party/angle/src/compiler/translator/TranslatorGLSL.cpp
@@ -0,0 +1,64 @@
+//
+// Copyright (c) 2002-2013 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/TranslatorGLSL.h"
+
+#include "compiler/translator/OutputGLSL.h"
+#include "compiler/translator/VersionGLSL.h"
+
+static void writeVersion(ShShaderType type, TIntermNode* root,
+                         TInfoSinkBase& sink) {
+    TVersionGLSL versionGLSL(type);
+    root->traverse(&versionGLSL);
+    int version = versionGLSL.getVersion();
+    // We need to write version directive only if it is greater than 110.
+    // If there is no version directive in the shader, 110 is implied.
+    if (version > 110) {
+        sink << "#version " << version << "\n";
+    }
+}
+
+TranslatorGLSL::TranslatorGLSL(ShShaderType type, ShShaderSpec spec)
+    : TCompiler(type, spec, SH_GLSL_OUTPUT) {
+}
+
+void TranslatorGLSL::translate(TIntermNode* root) {
+    TInfoSinkBase& sink = getInfoSink().obj;
+
+    // Write GLSL version.
+    writeVersion(getShaderType(), root, sink);
+
+    // Write extension behaviour as needed
+    writeExtensionBehavior();
+
+    // Write emulated built-in functions if needed.
+    getBuiltInFunctionEmulator().OutputEmulatedFunctionDefinition(
+        sink, false);
+
+    // Write array bounds clamping emulation if needed.
+    getArrayBoundsClamper().OutputClampingFunctionDefinition(sink);
+
+    // Write translated shader.
+    TOutputGLSL outputGLSL(sink, getArrayIndexClampingStrategy(), getHashFunction(), getNameMap(), getSymbolTable(), getShaderVersion());
+    root->traverse(&outputGLSL);
+}
+
+void TranslatorGLSL::writeExtensionBehavior() {
+    TInfoSinkBase& sink = getInfoSink().obj;
+    const TExtensionBehavior& extensionBehavior = getExtensionBehavior();
+    for (TExtensionBehavior::const_iterator iter = extensionBehavior.begin();
+         iter != extensionBehavior.end(); ++iter) {
+        if (iter->second == EBhUndefined)
+            continue;
+
+        // For GLSL output, we don't need to emit most extensions explicitly,
+        // but some we need to translate.
+        if (iter->first == "GL_EXT_shader_texture_lod") {
+            sink << "#extension GL_ARB_shader_texture_lod : "
+                 << getBehaviorString(iter->second) << "\n";
+        }
+    }
+}