Function createProgram

DE_APP/src/common.cpp:431–489

}

bool createProgram(cl_context context, cl_device_id device, string filename, cl_program* program)
{
    cl_int errorNumber = 0;
    ifstream kernelFile(filename.c_str(), ios::in);

    if(!kernelFile.is_open())
    {
        cerr << "Unable to open " << filename << ". " << __FILE__ << ":"<< __LINE__ << endl;
        return false;
    }

    /*
     * Read the kernel file into an output stream.
     * Convert this into a char array for passing to OpenCL.
     */
    ostringstream outputStringStream;
    outputStringStream << kernelFile.rdbuf();
    string srcStdStr = outputStringStream.str();
    const char* charSource = srcStdStr.c_str();

    *program = clCreateProgramWithSource(context, 1, &charSource, NULL, &errorNumber);
    if (!checkSuccess(errorNumber) || program == NULL)
    {
        cerr << "Failed to create OpenCL program. " << __FILE__ << ":"<< __LINE__ << endl;
        return false;
    }

    /* Try to build the OpenCL program. */
    bool buildSuccess = checkSuccess(clBuildProgram(*program, 0, NULL, NULL, NULL, NULL));

    /* Get the size of the build log. */
    size_t logSize = 0;
    clGetProgramBuildInfo(*program, device, CL_PROGRAM_BUILD_LOG, 0, NULL, &logSize);

    /*
     * If the build succeeds with no log, an empty string is returned (logSize = 1),
     * we only want to print the message if it has some content (logSize > 1).
     */
    if (logSize > 1)
    {
        char* log = new char[logSize];
        clGetProgramBuildInfo(*program, device, CL_PROGRAM_BUILD_LOG, logSize, log, NULL);

        string* stringChars = new string(log, logSize);
        cerr << "Build log:\n " << *stringChars << endl;

        delete[] log;
        delete stringChars;
    }

    if (!buildSuccess)
    {
        clReleaseProgram(*program);
        cerr << "Failed to build OpenCL program. " << __FILE__ << ":"<< __LINE__ << endl;
        return false;
    }

    return true;