HISTSIZE
if (fHistEntries < HISTSIZE) {
entry = (fOldestEntry + fHistEntries) % HISTSIZE;
fOldestEntry = (fOldestEntry + 1) % HISTSIZE;
fps += fFpsHistory[(fOldestEntry + i) % HISTSIZE];
float fLastYXRatio, fYxRatio, fFpsHistory[HISTSIZE];