Method getKernels

Source/Falcor/Core/Program/ProgramVersion.cpp:191–252

}

ref<const ProgramKernels> ProgramVersion::getKernels(Device* pDevice, ProgramVars const* pVars) const
{
    // We need are going to look up or create specialized kernels
    // based on how parameters are bound in `pVars`.
    //
    // To do this we need to identify those parameters that are relevant
    // to specialization, and what argument type/value is bound to
    // those parameters.
    //
    std::string specializationKey;

    ParameterBlock::SpecializationArgs specializationArgs;
    if (pVars)
    {
        pVars->collectSpecializationArgs(specializationArgs);
    }

    bool first = true;
    for (auto specializationArg : specializationArgs)
    {
        if (!first)
            specializationKey += ",";
        specializationKey += std::string(specializationArg.type->getName());
        first = false;
    }

    auto foundKernels = mpKernels.find(specializationKey);
    if (foundKernels != mpKernels.end())
    {
        return foundKernels->second;
    }

    FALCOR_ASSERT(mpProgram);

    // Loop so that user can trigger recompilation on error
    for (;;)
    {
        std::string log;
        auto pKernels = pDevice->getProgramManager()->createProgramKernels(*mpProgram, *this, *pVars, log);
        if (pKernels)
        {
            // Success

            if (!log.empty())
            {
                logWarning("Warnings in program:\n{}\n{}", getName(), log);
            }

            mpKernels[specializationKey] = pKernels;
            return pKernels;
        }
        else
        {
            // Failure
            std::string msg = fmt::format("Failed to link program:\n{}\n\n{}", getName(), log);
            bool showMessageBox = is_set(getErrorDiagnosticFlags(), ErrorDiagnosticFlags::ShowMessageBoxOnError);
            if (showMessageBox && reportErrorAndAllowRetry(msg))
                continue;