Add rate-limited logging for unimplemented es functions.

    return res;

}

static pthread_mutex_t sLogPrintMutex = PTHREAD_MUTEX_INITIALIZER;

static nsecs_t sLogPrintTime = 0;

#define NSECS_DURATION 1000000000

void gl_unimplemented() {

    bool printLog = false;

    nsecs_t now = systemTime();

    pthread_mutex_lock(&sLogPrintMutex);

    if ((now - sLogPrintTime) > NSECS_DURATION) {

        sLogPrintTime = now;

        printLog = true;

    }

    pthread_mutex_unlock(&sLogPrintMutex);

    if (printLog) {

        ALOGE("called unimplemented OpenGL ES API");

        char value[PROPERTY_VALUE_MAX];

        property_get("debug.egl.callstack", value, "0");

            CallStack stack(LOG_TAG);

        }

    }

}

void gl_noop() {

}