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// Copyright 2016 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <emscripten.h>
int numFrames = 0;
void looper() {
static double frame0 = 0;
if (!frame0) frame0 = emscripten_get_now();
double start = emscripten_get_now();
++numFrames;
printf("Frame %d\n", numFrames);
if (numFrames == 10) {
double now = emscripten_get_now();
// Sub one to account for intervals vs endpoints
double msecsPerFrame = (now - frame0) / (numFrames-1);
printf("Avg. msecs/frame: %f\n", msecsPerFrame);
emscripten_cancel_main_loop();
// Expecting 500msecs/frame, but allow a lot of leeway. Bad value would be
// 900msecs/frame (400msecs of processing below and 500msecs of delay)
exit((msecsPerFrame > 350 && msecsPerFrame < 650) ? 0 : 1);
}
// Busy wait 400 msecs.
double now = start;
while (now - start < 400) {
now = emscripten_get_now();
}
}
int main() {
// Want to run at 2 fps, or 500msecs/frame.
emscripten_set_main_loop(looper, 2, 0);
return 99;
}
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