TString UniformHLSL::interfaceBlockMembersString(const TInterfaceBlock &interfaceBlock, TLayoutBlockStorage blockStorage)
{
TString hlsl;
Std140PaddingHelper padHelper = mStructureHLSL->getPaddingHelper();
for (unsigned int typeIndex = 0; typeIndex < interfaceBlock.fields().size(); typeIndex++)
{
const TField &field = *interfaceBlock.fields()[typeIndex];
const TType &fieldType = *field.type();
if (blockStorage == EbsStd140)
{
// 2 and 3 component vector types in some cases need pre-padding
hlsl += padHelper.prePaddingString(fieldType);
}
hlsl += " " + InterfaceBlockFieldTypeString(field, blockStorage) +
" " + Decorate(field.name()) + ArrayString(fieldType) + ";\n";
// must pad out after matrices and arrays, where HLSL usually allows itself room to pack stuff
if (blockStorage == EbsStd140)
{
const bool useHLSLRowMajorPacking = (fieldType.getLayoutQualifier().matrixPacking == EmpColumnMajor);
hlsl += padHelper.postPaddingString(fieldType, useHLSLRowMajorPacking);
}
}
return hlsl;
}
TString UniformHLSL::uniformBlockString(const TInterfaceBlock &interfaceBlock,
unsigned int registerIndex,
unsigned int arrayIndex)
{
const TString &arrayIndexString =
(arrayIndex != GL_INVALID_INDEX ? Decorate(str(arrayIndex)) : "");
const TString &blockName = interfaceBlock.name() + arrayIndexString;
TString hlsl;
hlsl += "cbuffer " + blockName + " : register(b" + str(registerIndex) +
")\n"
"{\n";
if (interfaceBlock.hasInstanceName())
{
hlsl += " " + InterfaceBlockStructName(interfaceBlock) + " " +
uniformBlockInstanceString(interfaceBlock, arrayIndex) + ";\n";
}
else
{
const TLayoutBlockStorage blockStorage = interfaceBlock.blockStorage();
hlsl += uniformBlockMembersString(interfaceBlock, blockStorage);
}
hlsl += "};\n\n";
return hlsl;
}
static TString InterfaceBlockFieldName(const TInterfaceBlock &interfaceBlock, const TField &field)
{
if (interfaceBlock.hasInstanceName())
{
return interfaceBlock.name() + "." + field.name();
}
else
{
return field.name();
}
}
TString UniformHLSL::interfaceBlockInstanceString(const TInterfaceBlock& interfaceBlock, unsigned int arrayIndex)
{
if (!interfaceBlock.hasInstanceName())
{
return "";
}
else if (interfaceBlock.isArray())
{
return DecoratePrivate(interfaceBlock.instanceName()) + "_" + str(arrayIndex);
}
else
{
return Decorate(interfaceBlock.instanceName());
}
}
TString UniformHLSL::interfaceBlockStructString(const TInterfaceBlock &interfaceBlock)
{
const TLayoutBlockStorage blockStorage = interfaceBlock.blockStorage();
return "struct " + InterfaceBlockStructName(interfaceBlock) + "\n"
"{\n" +
interfaceBlockMembersString(interfaceBlock, blockStorage) +
"};\n\n";
}
static TString InterfaceBlockStructName(const TInterfaceBlock &interfaceBlock)
{
return DecoratePrivate(interfaceBlock.name()) + "_type";
}
