Function runTest

cpp/0_Introduction/simpleTextureDrv/simpleTextureDrv.cpp:108–304

/////////////////////////////////////////////////////////////////////////// Run a simple test for CUDA ///////////////////////////////////////////////////////////////////////////

//! Run a simple test for CUDA
////////////////////////////////////////////////////////////////////////////////
void runTest(int argc, char **argv)
{
    bool bTestResults = true;

    // initialize CUDA
    CUfunction transform = NULL;

    if (initCUDA(argc, argv, &transform) != CUDA_SUCCESS) {
        exit(EXIT_FAILURE);
    }

    // load image from disk
    float       *h_data = NULL;
    unsigned int width, height;
    char        *image_path = sdkFindFilePath(image_filename, argv[0]);

    if (image_path == NULL) {
        printf("Unable to find image file: '%s'\n", image_filename);
        exit(EXIT_FAILURE);
    }

    sdkLoadPGM(image_path, &h_data, &width, &height);

    size_t size = width * height * sizeof(float);
    printf("Loaded '%s', %d x %d pixels\n", image_filename, width, height);

    // load reference image from image (output)
    float *h_data_ref = (float *)malloc(size);
    char  *ref_path   = sdkFindFilePath(ref_filename, argv[0]);

    if (ref_path == NULL) {
        printf("Unable to find reference file %s\n", ref_filename);
        exit(EXIT_FAILURE);
    }

    sdkLoadPGM(ref_path, &h_data_ref, &width, &height);

    // allocate device memory for result
    CUdeviceptr d_data = (CUdeviceptr)NULL;
    checkCudaErrors(cuMemAlloc(&d_data, size));

    // allocate array and copy image data
    CUarray               cu_array;
    CUDA_ARRAY_DESCRIPTOR desc;
    desc.Format      = CU_AD_FORMAT_FLOAT;
    desc.NumChannels = 1;
    desc.Width       = width;
    desc.Height      = height;
    checkCudaErrors(cuArrayCreate(&cu_array, &desc));
    CUDA_MEMCPY2D copyParam;
    memset(&copyParam, 0, sizeof(copyParam));
    copyParam.dstMemoryType = CU_MEMORYTYPE_ARRAY;
    copyParam.dstArray      = cu_array;
    copyParam.srcMemoryType = CU_MEMORYTYPE_HOST;
    copyParam.srcHost       = h_data;
    copyParam.srcPitch      = width * sizeof(float);
    copyParam.WidthInBytes  = copyParam.srcPitch;
    copyParam.Height        = height;