Function display

cpp/0_Introduction/simpleCUDA2GL/main.cpp:331–379

/////////////////////////////////////////////////////////////////////////// Display callback ///////////////////////////////////////////////////////////////////////////

//! Display callback
////////////////////////////////////////////////////////////////////////////////
void display()
{
    sdkStartTimer(&timer);

    if (enable_cuda) {
        generateCUDAImage();
        displayImage(tex_cudaResult);
    }

    // NOTE: I needed to add this call so the timing is consistent.
    // Need to investigate why
    cudaDeviceSynchronize();
    sdkStopTimer(&timer);

    // flip backbuffer
    glutSwapBuffers();

    // If specified, Check rendering against reference,
    if (ref_file && g_CheckRender && g_CheckRender->IsQAReadback()) {
        static int pass = 0;

        if (pass > 0) {
            g_CheckRender->readback(window_width, window_height);
            char currentOutputPPM[256];
            sprintf(currentOutputPPM, "kilt.ppm");
            g_CheckRender->savePPM(currentOutputPPM, true, NULL);

            if (!g_CheckRender->PPMvsPPM(currentOutputPPM, sdkFindFilePath(ref_file, pArgv[0]), MAX_EPSILON, 0.30f)) {
                g_TotalErrors++;
            }

            Cleanup((g_TotalErrors == 0) ? EXIT_SUCCESS : EXIT_FAILURE);
        }

        pass++;
    }

    // Update fps counter, fps/title display and log
    if (++fpsCount == fpsLimit) {
        char  cTitle[256];
        float fps = 1000.0f / sdkGetAverageTimerValue(&timer);
        sprintf(cTitle, "CUDA GL Post Processing (%d x %d): %.1f fps", window_width, window_height, fps);
        glutSetWindowTitle(cTitle);
        // printf("%s\n", cTitle);
        fpsCount = 0;
        fpsLimit = (int)((fps > 1.0f) ? fps : 1.0f);
        sdkResetTimer(&timer);
    }
}

void timerEvent(int value)
{