C++ TType::getQualifier方法代码示例

void TOutputGLSLBase::writeLayoutQualifier(const TType &type)
{
    if (type.getQualifier() == EvqFragmentOut || type.getQualifier() == EvqVertexIn)
    {
        const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier();
        if (layoutQualifier.location >= 0)
        {
            TInfoSinkBase &out = objSink();
            out << "layout(location = " << layoutQualifier.location << ") ";
        }
    }
}

void TOutputGLSLBase::writeVariableType(const TType& type)
{
    TInfoSinkBase& out = objSink();
    TQualifier qualifier = type.getQualifier();
    // TODO(alokp): Validate qualifier for variable declarations.
    if ((qualifier != EvqTemporary) && (qualifier != EvqGlobal))
        out << type.getQualifierString() << " ";
    // Declare the struct if we have not done so already.
    if ((type.getBasicType() == EbtStruct) &&
        (mDeclaredStructs.find(type.getTypeName()) == mDeclaredStructs.end()))
    {
        out << "struct " << type.getTypeName() << "{\n";
        const TTypeList* structure = type.getStruct();
        ASSERT(structure != NULL);
        for (size_t i = 0; i < structure->size(); ++i)
        {
            const TType* fieldType = (*structure)[i].type;
            ASSERT(fieldType != NULL);
            if (writeVariablePrecision(fieldType->getPrecision()))
                out << " ";
            out << getTypeName(*fieldType) << " " << fieldType->getFieldName();
            if (fieldType->isArray())
                out << arrayBrackets(*fieldType);
            out << ";\n";
        }
        out << "}";
        mDeclaredStructs.insert(type.getTypeName());
    }
    else
    {
        if (writeVariablePrecision(type.getPrecision()))
            out << " ";
        out << getTypeName(type);
    }
}

void TOutputGLSLBase::writeVariableType(const TType &type)
{
    TInfoSinkBase &out = objSink();
    TQualifier qualifier = type.getQualifier();
    if (qualifier != EvqTemporary && qualifier != EvqGlobal)
    {
        out << type.getQualifierString() << " ";
    }
    // Declare the struct if we have not done so already.
    if (type.getBasicType() == EbtStruct && !structDeclared(type.getStruct()))
    {
        TStructure *structure = type.getStruct();

        declareStruct(structure);

        if (!structure->name().empty())
        {
            mDeclaredStructs.insert(structure->uniqueId());
        }
    }
    else
    {
        if (writeVariablePrecision(type.getPrecision()))
            out << " ";
        out << getTypeName(type);
    }
}

    int resolveInOutLocation(EShLanguage /*stage*/, const char* /*name*/, const TType& type, bool /*is_live*/) override
    {
        // kick out of not doing this
        if (!doAutoLocationMapping)
            return -1;

        // no locations added if already present, or a built-in variable
        if (type.getQualifier().hasLocation() || type.isBuiltIn())
            return -1;

        // no locations on blocks of built-in variables
        if (type.isStruct()) {
            if (type.getStruct()->size() < 1)
                return -1;
            if ((*type.getStruct())[0].type->isBuiltIn())
                return -1;
        }

        // Placeholder.
        // TODO: It would be nice to flesh this out using 
        // intermediate->computeTypeLocationSize(type), or functions that call it like
        // intermediate->addUsedLocation()
        // These in turn would want the intermediate, which is not available here, but
        // is available in many places, and a lot of copying from it could be saved if
        // it were just available.
        return 0;
    }

// Recursively figure out how many locations are used up by an input or output type.
// Return the size of type, as measured by "locations".
int TIntermediate::computeTypeLocationSize(const TType& type) const
{
    // "If the declared input is an array of size n and each element takes m locations, it will be assigned m * n 
    // consecutive locations..."
    if (type.isArray()) {
        // TODO: perf: this can be flattened by using getCumulativeArraySize(), and a deref that discards all arrayness
        TType elementType(type, 0);
        if (type.isImplicitlySizedArray()) {
            // TODO: are there valid cases of having an implicitly-sized array with a location?  If so, running this code too early.
            return computeTypeLocationSize(elementType);
        } else
            return type.getOuterArraySize() * computeTypeLocationSize(elementType);
    }

    // "The locations consumed by block and structure members are determined by applying the rules above 
    // recursively..."    
    if (type.isStruct()) {
        int size = 0;
        for (int member = 0; member < (int)type.getStruct()->size(); ++member) {
            TType memberType(type, member);
            size += computeTypeLocationSize(memberType);
        }
        return size;
    }

    // ES: "If a shader input is any scalar or vector type, it will consume a single location."

    // Desktop: "If a vertex shader input is any scalar or vector type, it will consume a single location. If a non-vertex 
    // shader input is a scalar or vector type other than dvec3 or dvec4, it will consume a single location, while 
    // types dvec3 or dvec4 will consume two consecutive locations. Inputs of type double and dvec2 will 
    // consume only a single location, in all stages."
    if (type.isScalar())
        return 1;
    if (type.isVector()) {
        if (language == EShLangVertex && type.getQualifier().isPipeInput())
            return 1;
        if (type.getBasicType() == EbtDouble && type.getVectorSize() > 2)
            return 2;
        else
            return 1;
    }

    // "If the declared input is an n x m single- or double-precision matrix, ...
    // The number of locations assigned for each matrix will be the same as 
    // for an n-element array of m-component vectors..."
    if (type.isMatrix()) {
        TType columnType(type, 0);
        return type.getMatrixCols() * computeTypeLocationSize(columnType);
    }

    assert(0);
    return 1;
}

void TOutputGLSLBase::writeVariableType(const TType &type)
{
    TInfoSinkBase &out = objSink();
    if (type.isInvariant())
    {
        out << "invariant ";
    }
    TQualifier qualifier = type.getQualifier();
    if (qualifier != EvqTemporary && qualifier != EvqGlobal)
    {
        if (IsGLSL130OrNewer(mOutput))
        {
            switch (qualifier)
            {
              case EvqAttribute:
                out << "in ";
                break;
              case EvqVaryingIn:
                out << "in ";
                break;
              case EvqVaryingOut:
                out << "out ";
                break;
              default:
                out << type.getQualifierString() << " ";
                break;
            }
        }
        else
        {
            out << type.getQualifierString() << " ";
        }
    }
    // Declare the struct if we have not done so already.
    if (type.getBasicType() == EbtStruct && !structDeclared(type.getStruct()))
    {
        TStructure *structure = type.getStruct();

        declareStruct(structure);

        if (!structure->name().empty())
        {
            mDeclaredStructs.insert(structure->uniqueId());
        }
    }
    else
    {
        if (writeVariablePrecision(type.getPrecision()))
            out << " ";
        out << getTypeName(type);
    }
}

// fully_specified_type
//      : type_specifier
//      | type_qualifier type_specifier
//
bool HlslGrammar::acceptFullySpecifiedType(TType& type)
{
    // type_qualifier
    TQualifier qualifier;
    qualifier.clear();
    acceptQualifier(qualifier);

    // type_specifier
    if (! acceptType(type))
        return false;
    type.getQualifier() = qualifier;

    return true;
}

void GetVariableTraverser::setTypeSpecificInfo(
    const TType &type, const TString& name, Varying *variable)
{
    ASSERT(variable);
    switch (type.getQualifier())
    {
      case EvqVaryingIn:
      case EvqVaryingOut:
      case EvqVertexOut:
      case EvqSmoothOut:
      case EvqFlatOut:
      case EvqCentroidOut:
        if (mSymbolTable.isVaryingInvariant(std::string(name.c_str())) || type.isInvariant())
        {
            variable->isInvariant = true;
        }
        break;
      default:
        break;
    }

    variable->interpolation = GetInterpolationType(type.getQualifier());
}

    int resolveInOutLocation(EShLanguage stage, const char* /*name*/, const TType& type, bool /*is_live*/) override
    {
        // kick out of not doing this
        if (!doAutoLocationMapping())
            return -1;

        // no locations added if already present, or a built-in variable
        if (type.getQualifier().hasLocation() || type.isBuiltIn())
            return -1;

        // no locations on blocks of built-in variables
        if (type.isStruct()) {
            if (type.getStruct()->size() < 1)
                return -1;
            if ((*type.getStruct())[0].type->isBuiltIn())
                return -1;
        }

        // point to the right input or output location counter
        int& nextLocation = type.getQualifier().isPipeInput() ? nextInputLocation : nextOutputLocation;

        // Placeholder. This does not do proper cross-stage lining up, nor
        // work with mixed location/no-location declarations.
        int location = nextLocation;
        int typeLocationSize;
        // Don’t take into account the outer-most array if the stage’s
        // interface is automatically an array.
        if (type.getQualifier().isArrayedIo(stage)) {
                TType elementType(type, 0);
                typeLocationSize = TIntermediate::computeTypeLocationSize(elementType, stage);
        } else {
                typeLocationSize = TIntermediate::computeTypeLocationSize(type, stage);
        }
        nextLocation += typeLocationSize;

        return location;
    }

void TOutputGLSLBase::writeVariableType(const TType& type)
{
    TInfoSinkBase& out = objSink();
    TQualifier qualifier = type.getQualifier();
    // TODO(alokp): Validate qualifier for variable declarations.
    if ((qualifier != EvqTemporary) && (qualifier != EvqGlobal))
        out << type.getQualifierString() << " ";
    // Declare the struct if we have not done so already.
    if ((type.getBasicType() == EbtStruct) && !structDeclared(type.getStruct()))
    {
        declareStruct(type.getStruct());
    }
    else
    {
        if (writeVariablePrecision(type.getPrecision()))
            out << " ";
        out << getTypeName(type);
    }
}

// Accumulate xfb buffer ranges and check for collisions as the accumulation is done.
//
// Returns < 0 if no collision, >= 0 if collision and the value returned is a colliding value.
//
int TIntermediate::addXfbBufferOffset(const TType& type)
{
    const TQualifier& qualifier = type.getQualifier();

    assert(qualifier.hasXfbOffset() && qualifier.hasXfbBuffer());
    TXfbBuffer& buffer = xfbBuffers[qualifier.layoutXfbBuffer];

    // compute the range
    unsigned int size = computeTypeXfbSize(type, buffer.containsDouble);
    buffer.implicitStride = std::max(buffer.implicitStride, qualifier.layoutXfbOffset + size);
    TRange range(qualifier.layoutXfbOffset, qualifier.layoutXfbOffset + size - 1);

    // check for collisions
    for (size_t r = 0; r < buffer.ranges.size(); ++r) {
        if (range.overlap(buffer.ranges[r])) {
            // there is a collision; pick an example to return
            return std::max(range.start, buffer.ranges[r].start);
        }
    }

    buffer.ranges.push_back(range);

    return -1;  // no collision
}