commit 1269076cbfe23a1a87487eca8315e5786de01f66
author Olli Etuaho <oetuaho@nvidia.com> Tue Mar 31 12:55:28 2015 +0300
committer Olli Etuaho <oetuaho@nvidia.com> Thu Apr 02 16:46:02 2015 +0000
tree f4ac963a514a5aa10924d3a93fbc306dc4ea68e7
parent 0d91328b99d2a8b2c3bfe45d64faad3e7907637c

Add basic support for assigning arrays in HLSL output

Implement support for assignments where the return value of the assignment
is not used in another part of the expression.

TEST=WebGL conformance tests
BUG=angleproject:960

Change-Id: Ibf9d71a75d27d139d2aabb5162ab04a0974321d3
Reviewed-on: https://chromium-review.googlesource.com/263222
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

src/compiler/translator/OutputHLSL.cpp

diff --git a/src/compiler/translator/OutputHLSL.cpp b/src/compiler/translator/OutputHLSL.cpp
index ffc6cf3..c3240f5 100644
--- a/src/compiler/translator/OutputHLSL.cpp
+++ b/src/compiler/translator/OutputHLSL.cpp
@@ -345,6 +345,14 @@
             out << eqFunction->functionDefinition << "\n";
         }
     }
+    if (!mArrayAssignmentFunctions.empty())
+    {
+        out << "\n// Assignment functions\n\n";
+        for (const auto &assignmentFunction : mArrayAssignmentFunctions)
+        {
+            out << assignmentFunction.functionDefinition << "\n";
+        }
+    }
 
     if (mUsesDiscardRewriting)
     {
@@ -1443,7 +1451,8 @@
       case EOpAssign:
         if (node->getLeft()->isArray())
         {
-            UNIMPLEMENTED();
+            const TString &functionName = addArrayAssignmentFunction(node->getType());
+            outputTriplet(visit, (functionName + "(").c_str(), ", ", ")");
         }
         else
         {
@@ -3022,7 +3031,7 @@
 
     const TString &typeName = TypeString(type);
 
-    ArrayEqualityFunction *function = new ArrayEqualityFunction();
+    ArrayHelperFunction *function = new ArrayHelperFunction();
     function->type = type;
 
     TInfoSinkBase fnNameOut;
@@ -3061,4 +3070,42 @@
     return function->functionName;
 }
 
+TString OutputHLSL::addArrayAssignmentFunction(const TType& type)
+{
+    for (const auto &assignFunction : mArrayAssignmentFunctions)
+    {
+        if (assignFunction.type == type)
+        {
+            return assignFunction.functionName;
+        }
+    }
+
+    const TString &typeName = TypeString(type);
+
+    ArrayHelperFunction function;
+    function.type = type;
+
+    TInfoSinkBase fnNameOut;
+    fnNameOut << "angle_assign_" << type.getArraySize() << "_" << typeName;
+    function.functionName = fnNameOut.c_str();
+
+    TInfoSinkBase fnOut;
+
+    fnOut << "void " << function.functionName << "(out "
+        << typeName << " a[" << type.getArraySize() << "], "
+        << typeName << " b[" << type.getArraySize() << "])\n"
+        << "{\n"
+           "    for (int i = 0; i < " << type.getArraySize() << "; ++i)\n"
+           "    {\n"
+           "        a[i] = b[i];\n"
+           "    }\n"
+           "}\n";
+
+    function.functionDefinition = fnOut.c_str();
+
+    mArrayAssignmentFunctions.push_back(function);
+
+    return function.functionName;
+}
+
 }