void StructureHLSL::storeStd140ElementIndex(const TStructure &structure, bool useHLSLRowMajorPacking)
{
Std140PaddingHelper padHelper = getPaddingHelper();
const TFieldList &fields = structure.fields();
for (unsigned int i = 0; i < fields.size(); i++)
{
padHelper.prePadding(*fields[i]->type());
}
// Add remaining element index to the global map, for use with nested structs in standard layouts
const TString &structName = QualifiedStructNameString(structure, useHLSLRowMajorPacking, true);
mStd140StructElementIndexes[structName] = padHelper.elementIndex();
}
TString StructureHLSL::define(const TStructure &structure, bool useHLSLRowMajorPacking,
bool useStd140Packing, Std140PaddingHelper *padHelper)
{
const TFieldList &fields = structure.fields();
const bool isNameless = (structure.name() == "");
const TString &structName = QualifiedStructNameString(structure, useHLSLRowMajorPacking,
useStd140Packing);
const TString declareString = (isNameless ? "struct" : "struct " + structName);
TString string;
string += declareString + "\n"
"{\n";
for (unsigned int i = 0; i < fields.size(); i++)
{
const TField &field = *fields[i];
const TType &fieldType = *field.type();
const TStructure *fieldStruct = fieldType.getStruct();
const TString &fieldTypeString = fieldStruct ?
QualifiedStructNameString(*fieldStruct, useHLSLRowMajorPacking,
useStd140Packing) :
TypeString(fieldType);
if (padHelper)
{
string += padHelper->prePaddingString(fieldType);
}
string += " " + fieldTypeString + " " + DecorateField(field.name(), structure) + ArrayString(fieldType) + ";\n";
if (padHelper)
{
string += padHelper->postPaddingString(fieldType, useHLSLRowMajorPacking);
}
}
// Nameless structs do not finish with a semicolon and newline, to leave room for an instance variable
string += (isNameless ? "} " : "};\n");
return string;
}
TIntermTyped *CreateZeroNode(const TType &type)
{
TType constType(type);
constType.setQualifier(EvqConst);
if (!type.isArray() && type.getBasicType() != EbtStruct)
{
size_t size = constType.getObjectSize();
TConstantUnion *u = new TConstantUnion[size];
for (size_t i = 0; i < size; ++i)
{
switch (type.getBasicType())
{
case EbtFloat:
u[i].setFConst(0.0f);
break;
case EbtInt:
u[i].setIConst(0);
break;
case EbtUInt:
u[i].setUConst(0u);
break;
case EbtBool:
u[i].setBConst(false);
break;
default:
// CreateZeroNode is called by ParseContext that keeps parsing even when an
// error occurs, so it is possible for CreateZeroNode to be called with
// non-basic types. This happens only on error condition but CreateZeroNode
// needs to return a value with the correct type to continue the typecheck.
// That's why we handle non-basic type by setting whatever value, we just need
// the type to be right.
u[i].setIConst(42);
break;
}
}
TIntermConstantUnion *node = new TIntermConstantUnion(u, constType);
return node;
}
if (type.getBasicType() == EbtVoid)
{
// Void array. This happens only on error condition, similarly to the case above. We don't
// have a constructor operator for void, so this needs special handling. We'll end up with a
// value without the array type, but that should not be a problem.
while (constType.isArray())
{
constType.toArrayElementType();
}
return CreateZeroNode(constType);
}
TIntermSequence *arguments = new TIntermSequence();
if (type.isArray())
{
TType elementType(type);
elementType.toArrayElementType();
size_t arraySize = type.getOutermostArraySize();
for (size_t i = 0; i < arraySize; ++i)
{
arguments->push_back(CreateZeroNode(elementType));
}
}
else
{
ASSERT(type.getBasicType() == EbtStruct);
TStructure *structure = type.getStruct();
for (const auto &field : structure->fields())
{
arguments->push_back(CreateZeroNode(*field->type()));
}
}
return TIntermAggregate::CreateConstructor(constType, arguments);
}