@lightningjs/renderer
Version:
Lightning 3 Renderer
66 lines • 2.22 kB
JavaScript
/*
* If not stated otherwise in this file or this component's LICENSE file the
* following copyright and licenses apply:
*
* Copyright 2023 Comcast Cable Communications Management, LLC.
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
let fpsBoundaries = [20, 40, 60, 80, 100];
let fpsInterval = 1000; // 1 second
const frameCounter = {
start: 0,
end: 0,
total: 0,
boundaries: [],
count: {},
increment(frameDelta) {
this.total++;
const boundaries = this.boundaries;
for (let i = 0; i < boundaries.length; i++) {
const bucket = boundaries[i];
if (frameDelta <= bucket) {
this.count[bucket]++;
return;
}
}
this.count['overflow']++;
},
get averageFps() {
//calculate fps based on frame count and elapsed time
return (this.total / (this.end - this.start)) * 1000;
},
};
export function setFpsBoundaries(newBoundaries) {
// sort buckets in ascending order just in case
fpsBoundaries = newBoundaries.slice().sort((a, b) => a - b);
}
export function setFpsInterval(newInterval) {
fpsInterval = newInterval;
}
export function createFrameCounter(frameTime) {
const counter = Object.create(frameCounter);
counter.boundaries = fpsBoundaries;
counter.start = frameTime;
counter.end = frameTime + fpsInterval;
counter.total = 0;
counter.count = Object.create(null);
//fill frames with 0 for each bucket
for (let i = 0; i < fpsBoundaries.length; i++) {
const bucket = fpsBoundaries[i];
counter.count[bucket] = 0;
}
counter.count['overflow'] = 0;
return counter;
}
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