1 files changed, 148 insertions, 0 deletions
diff --git a/gfx/angle/src/compiler/translator/TranslatorHLSL.cpp b/gfx/angle/src/compiler/translator/TranslatorHLSL.cpp
new file mode 100755
index 000000000..7ef1d4e36
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/TranslatorHLSL.cpp
@@ -0,0 +1,148 @@
+//
+// 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/TranslatorHLSL.h"
+
+#include "compiler/translator/AddDefaultReturnStatements.h"
+#include "compiler/translator/ArrayReturnValueToOutParameter.h"
+#include "compiler/translator/BreakVariableAliasingInInnerLoops.h"
+#include "compiler/translator/EmulatePrecision.h"
+#include "compiler/translator/ExpandIntegerPowExpressions.h"
+#include "compiler/translator/IntermNodePatternMatcher.h"
+#include "compiler/translator/OutputHLSL.h"
+#include "compiler/translator/RemoveDynamicIndexing.h"
+#include "compiler/translator/RewriteElseBlocks.h"
+#include "compiler/translator/RewriteTexelFetchOffset.h"
+#include "compiler/translator/RewriteUnaryMinusOperatorInt.h"
+#include "compiler/translator/SeparateArrayInitialization.h"
+#include "compiler/translator/SeparateDeclarations.h"
+#include "compiler/translator/SeparateExpressionsReturningArrays.h"
+#include "compiler/translator/SimplifyLoopConditions.h"
+#include "compiler/translator/SplitSequenceOperator.h"
+#include "compiler/translator/UnfoldShortCircuitToIf.h"
+
+namespace sh
+{
+
+TranslatorHLSL::TranslatorHLSL(sh::GLenum type, ShShaderSpec spec, ShShaderOutput output)
+    : TCompiler(type, spec, output)
+{
+}
+
+void TranslatorHLSL::translate(TIntermNode *root, ShCompileOptions compileOptions)
+{
+    const ShBuiltInResources &resources = getResources();
+    int numRenderTargets = resources.EXT_draw_buffers ? resources.MaxDrawBuffers : 1;
+
+    sh::AddDefaultReturnStatements(root);
+
+    SeparateDeclarations(root);
+
+    // Note that SimplifyLoopConditions needs to be run before any other AST transformations that
+    // may need to generate new statements from loop conditions or loop expressions.
+    SimplifyLoopConditions(root,
+                           IntermNodePatternMatcher::kExpressionReturningArray |
+                               IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
+                               IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
+                           getTemporaryIndex(), getSymbolTable(), getShaderVersion());
+
+    SplitSequenceOperator(root,
+                          IntermNodePatternMatcher::kExpressionReturningArray |
+                              IntermNodePatternMatcher::kUnfoldedShortCircuitExpression |
+                              IntermNodePatternMatcher::kDynamicIndexingOfVectorOrMatrixInLValue,
+                          getTemporaryIndex(), getSymbolTable(), getShaderVersion());
+
+    // Note that SeparateDeclarations needs to be run before UnfoldShortCircuitToIf.
+    UnfoldShortCircuitToIf(root, getTemporaryIndex());
+
+    SeparateExpressionsReturningArrays(root, getTemporaryIndex());
+
+    // Note that SeparateDeclarations needs to be run before SeparateArrayInitialization.
+    SeparateArrayInitialization(root);
+
+    // HLSL doesn't support arrays as return values, we'll need to make functions that have an array
+    // as a return value to use an out parameter to transfer the array data instead.
+    ArrayReturnValueToOutParameter(root, getTemporaryIndex());
+
+    if (!shouldRunLoopAndIndexingValidation(compileOptions))
+    {
+        // HLSL doesn't support dynamic indexing of vectors and matrices.
+        RemoveDynamicIndexing(root, getTemporaryIndex(), getSymbolTable(), getShaderVersion());
+    }
+
+    // Work around D3D9 bug that would manifest in vertex shaders with selection blocks which
+    // use a vertex attribute as a condition, and some related computation in the else block.
+    if (getOutputType() == SH_HLSL_3_0_OUTPUT && getShaderType() == GL_VERTEX_SHADER)
+    {
+        sh::RewriteElseBlocks(root, getTemporaryIndex());
+    }
+
+    // Work around an HLSL compiler frontend aliasing optimization bug.
+    // TODO(cwallez) The date is 2016-08-25, Microsoft said the bug would be fixed
+    // in the next release of d3dcompiler.dll, it would be nice to detect the DLL
+    // version and only apply the workaround if it is too old.
+    sh::BreakVariableAliasingInInnerLoops(root);
+
+    bool precisionEmulation =
+        getResources().WEBGL_debug_shader_precision && getPragma().debugShaderPrecision;
+
+    if (precisionEmulation)
+    {
+        EmulatePrecision emulatePrecision(getSymbolTable(), getShaderVersion());
+        root->traverse(&emulatePrecision);
+        emulatePrecision.updateTree();
+        emulatePrecision.writeEmulationHelpers(getInfoSink().obj, getShaderVersion(),
+                                               getOutputType());
+    }
+
+    if ((compileOptions & SH_EXPAND_SELECT_HLSL_INTEGER_POW_EXPRESSIONS) != 0)
+    {
+        sh::ExpandIntegerPowExpressions(root, getTemporaryIndex());
+    }
+
+    if ((compileOptions & SH_REWRITE_TEXELFETCHOFFSET_TO_TEXELFETCH) != 0)
+    {
+        sh::RewriteTexelFetchOffset(root, getSymbolTable(), getShaderVersion());
+    }
+
+    if (((compileOptions & SH_REWRITE_INTEGER_UNARY_MINUS_OPERATOR) != 0) &&
+        getShaderType() == GL_VERTEX_SHADER)
+    {
+        sh::RewriteUnaryMinusOperatorInt(root);
+    }
+
+    sh::OutputHLSL outputHLSL(getShaderType(), getShaderVersion(), getExtensionBehavior(),
+        getSourcePath(), getOutputType(), numRenderTargets, getUniforms(), compileOptions);
+
+    outputHLSL.output(root, getInfoSink().obj);
+
+    mInterfaceBlockRegisterMap = outputHLSL.getInterfaceBlockRegisterMap();
+    mUniformRegisterMap = outputHLSL.getUniformRegisterMap();
+}
+
+bool TranslatorHLSL::shouldFlattenPragmaStdglInvariantAll()
+{
+    // Not necessary when translating to HLSL.
+    return false;
+}
+
+bool TranslatorHLSL::hasInterfaceBlock(const std::string &interfaceBlockName) const
+{
+    return (mInterfaceBlockRegisterMap.count(interfaceBlockName) > 0);
+}
+
+unsigned int TranslatorHLSL::getInterfaceBlockRegister(const std::string &interfaceBlockName) const
+{
+    ASSERT(hasInterfaceBlock(interfaceBlockName));
+    return mInterfaceBlockRegisterMap.find(interfaceBlockName)->second;
+}
+
+const std::map<std::string, unsigned int> *TranslatorHLSL::getUniformRegisterMap() const
+{
+    return &mUniformRegisterMap;
+}
+
+}  // namespace sh