HLSL: Force flat interpolation for structure members. Fixes #940.

Test/baseResults/hlsl.entry-in.frag.out

@@ -58,7 +58,7 @@ gl_FragCoord origin is upper left
 0:13            Constant:
 0:13              0 (const int)
 0:13          v: direct index for structure ( temp 2-component vector of float)
-0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  temp 2-component vector of int i2})
+0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  flat temp 2-component vector of int i2})
 0:13            Constant:
 0:13              0 (const int)
 0:13        move second child to first child ( temp 4-component vector of float)
@@ -72,8 +72,8 @@ gl_FragCoord origin is upper left
 0:?             'i' ( temp structure{ temp 2-component vector of float v,  temp 4-component vector of float fragCoord,  temp 2-component vector of int i2})
 0:13            Constant:
 0:13              2 (const int)
-0:13          i2: direct index for structure ( temp 2-component vector of int)
-0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  temp 2-component vector of int i2})
+0:13          i2: direct index for structure ( flat temp 2-component vector of int)
+0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  flat temp 2-component vector of int i2})
 0:13            Constant:
 0:13              1 (const int)
 0:13      move second child to first child ( temp 4-component vector of float)
@@ -82,7 +82,7 @@ gl_FragCoord origin is upper left
 0:?           'i' ( temp structure{ temp 2-component vector of float v,  temp 4-component vector of float fragCoord,  temp 2-component vector of int i2})
 0:?   Linker Objects
 0:?     '@entryPointOutput' (layout( location=0) out 4-component vector of float)
-0:?     'i' (layout( location=0) in structure{ temp 2-component vector of float v,  temp 2-component vector of int i2})
+0:?     'i' (layout( location=0) in structure{ temp 2-component vector of float v,  flat temp 2-component vector of int i2})
 0:?     'i_fragCoord' ( in 4-component vector of float FragCoord)
 
 
@@ -148,7 +148,7 @@ gl_FragCoord origin is upper left
 0:13            Constant:
 0:13              0 (const int)
 0:13          v: direct index for structure ( temp 2-component vector of float)
-0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  temp 2-component vector of int i2})
+0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  flat temp 2-component vector of int i2})
 0:13            Constant:
 0:13              0 (const int)
 0:13        move second child to first child ( temp 4-component vector of float)
@@ -162,8 +162,8 @@ gl_FragCoord origin is upper left
 0:?             'i' ( temp structure{ temp 2-component vector of float v,  temp 4-component vector of float fragCoord,  temp 2-component vector of int i2})
 0:13            Constant:
 0:13              2 (const int)
-0:13          i2: direct index for structure ( temp 2-component vector of int)
-0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  temp 2-component vector of int i2})
+0:13          i2: direct index for structure ( flat temp 2-component vector of int)
+0:13            'i' (layout( location=0) in structure{ temp 2-component vector of float v,  flat temp 2-component vector of int i2})
 0:13            Constant:
 0:13              1 (const int)
 0:13      move second child to first child ( temp 4-component vector of float)
@@ -172,7 +172,7 @@ gl_FragCoord origin is upper left
 0:?           'i' ( temp structure{ temp 2-component vector of float v,  temp 4-component vector of float fragCoord,  temp 2-component vector of int i2})
 0:?   Linker Objects
 0:?     '@entryPointOutput' (layout( location=0) out 4-component vector of float)
-0:?     'i' (layout( location=0) in structure{ temp 2-component vector of float v,  temp 2-component vector of int i2})
+0:?     'i' (layout( location=0) in structure{ temp 2-component vector of float v,  flat temp 2-component vector of int i2})
 0:?     'i_fragCoord' ( in 4-component vector of float FragCoord)
 
 // Module Version 10000
@@ -207,6 +207,7 @@ gl_FragCoord origin is upper left
                               Name 63  "i_fragCoord"
                               Name 73  "@entryPointOutput"
                               Name 74  "param"
+                              MemberDecorate 54(InParam) 1 Flat
                               Decorate 56(i) Location 0
                               Decorate 63(i_fragCoord) BuiltIn FragCoord
                               Decorate 73(@entryPointOutput) Location 0

glslang/Include/Types.h

@@ -1349,7 +1349,6 @@ public:
         case EbtInt16:
         case EbtUint16:
 #endif
-        case EbtBool:
         case EbtAtomicUint:
             return true;
         default:
@@ -1469,9 +1468,9 @@ public:
             case EbtUint16:
 #endif
             case EbtBool:
-            return true;
+                return true;
             default:
-            return false;
+                return false;
             }
         };
 

hlsl/hlslParseHelper.cpp

@@ -791,7 +791,7 @@ TIntermTyped* HlslParseContext::handleBracketDereference(const TSourceLoc& loc,
     index = makeIntegerIndex(index);
 
     if (index == nullptr) {
-        error(loc, " unknown undex type ", "", "");
+        error(loc, " unknown index type ", "", "");
         return nullptr;
     }
 
@@ -1554,11 +1554,20 @@ void HlslParseContext::assignToInterface(TVariable& variable)
                     nextOutLocation += size;
                 }
             }
-            // Going into the fragment stage, integer-based stuff must be flat/nointerpolation
-            if (type.isIntegerDomain() && qualifier.builtIn == EbvNone &&
-                    qualifier.storage == EvqVaryingIn && language == EShLangFragment) {
-                qualifier.clearInterpolation();
-                qualifier.flat = true;
+            if (qualifier.storage == EvqVaryingIn && language == EShLangFragment) {
+                // Going into the fragment stage, integer-based stuff must be flat/nointerpolation
+                const auto fixQualifier = [](TType& type) {
+                    if (type.getQualifier().builtIn == EbvNone &&
+                        (type.isIntegerDomain() || type.getBasicType() == EbtBool)) {
+                        type.getQualifier().clearInterpolation();
+                        type.getQualifier().flat = true;
+                    }
+                };
+                if (type.isStruct())
+                    for (auto mem = (*type.getStruct()).begin(); mem != (*type.getStruct()).end(); ++mem)
+                        fixQualifier(*mem->type);
+                else
+                    fixQualifier(type);
             }
             trackLinkage(variable);
         }