2020-05-29 20:13:51 +00:00
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<!-- This benchmark aims to measure performance degredation related to
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moving a complex path. May be related to caching an alpha mask of the path at
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subpixel coordinates i.e. (25.234, 43.119) instead of (25, 43).
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As a consequence the cache may get full very quickly. Effect of paint opacity
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and rotation transformations on performance can also be tested using the query param options.
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Available query param options:
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- snap: Round all path translations to the nearest integer. This means subpixel coordinate.
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translations will not be used. Only has an effect when the translating option is used.
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- opacity: Use a transparent color to fill the path. If this option is
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not included then opaque black is used.
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- translate: The path will be randomly translated every frame.
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- rotate: The path will be randomly rotated every frame.
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-->
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<!DOCTYPE html>
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<html>
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<head>
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<title>Complex Path translation Perf</title>
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<meta charset="utf-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<script src="/static/canvaskit.js" type="text/javascript" charset="utf-8"></script>
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<style type="text/css" media="screen">
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body {
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margin: 0;
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padding: 0;
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}
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#test-svg {
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height: 0;
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width: 0;
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}
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#complex-path {
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height: 1000px;
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width: 1000px;
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}
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</style>
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</head>
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<body>
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<!-- Arbitrary svg for testing. Source: https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/gallardo.svg-->
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<object type="image/svg+xml" data="/static/assets/car.svg" id="test-svg">
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Car image
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</object>
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<main>
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<button id="start_bench">Start Benchmark</button>
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<br>
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<canvas id=complex-path width=1000 height=1000></canvas>
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</main>
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<script type="text/javascript" charset="utf-8">
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const urlSearchParams = new URLSearchParams(window.location.search);
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// We sample MAX_FRAMES or until MAX_SAMPLE_SECONDS has elapsed.
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const MAX_FRAMES = 60 * 30; // ~30s at 60fps
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const MAX_SAMPLE_MS = 30 * 1000; // in case something takes a while, stop after 30 seconds.
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const TRANSPARENT_PINK = new Float32Array([1,0,1,0.1]);
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const svgObjectElement = document.getElementById('test-svg');
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svgObjectElement.addEventListener('load', () => {
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CanvasKitInit({
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locateFile: (file) => '/static/' + file,
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}).then(run);
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});
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function run(CanvasKit) {
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const surface = getSurface(CanvasKit);
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if (!surface) {
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console.error('Could not make surface', window._error);
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return;
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}
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const skcanvas = surface.getCanvas();
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const grContext = surface.grContext;
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document.getElementById('start_bench').addEventListener('click', () => {
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// Initialize drawing related objects
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const svgElement = svgObjectElement.contentDocument;
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const svgPathAndFillColorPairs = svgToPathAndFillColorPairs(svgElement, CanvasKit);
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2020-10-07 20:09:22 +00:00
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const paint = new CanvasKit.Paint();
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2020-05-29 20:13:51 +00:00
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paint.setAntiAlias(true);
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paint.setStyle(CanvasKit.PaintStyle.Fill);
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let paintColor = CanvasKit.BLACK;
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// Path is large, scale canvas so entire path is visible
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skcanvas.scale(0.5, 0.5);
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// Initialize perf data
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let currentFrameNumber = 0;
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const frameTimesMs = new Float32Array(MAX_FRAMES);
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let startTimeMs = performance.now();
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let previousFrameTimeMs = performance.now();
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const resourceCacheUsageBytes = new Float32Array(MAX_FRAMES);
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const usedJSHeapSizesBytes = new Float32Array(MAX_FRAMES);
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function drawFrame() {
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// Draw complex path with random translations and rotations.
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let randomHorizontalTranslation = 0;
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let randomVerticalTranslation = 0;
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let randomRotation = 0;
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if (urlSearchParams.has('translate')) {
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randomHorizontalTranslation = Math.random() * 50 - 25;
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randomVerticalTranslation = Math.random() * 50 - 25;
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}
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if (urlSearchParams.has('snap')) {
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randomHorizontalTranslation = Math.round(randomHorizontalTranslation);
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randomVerticalTranslation = Math.round(randomVerticalTranslation);
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}
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if (urlSearchParams.has('opacity')) {
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paintColor = TRANSPARENT_PINK;
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}
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if (urlSearchParams.has('rotate')) {
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randomRotation = (Math.random() - 0.5) / 20;
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}
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skcanvas.clear(CanvasKit.WHITE);
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for (const [path, color] of svgPathAndFillColorPairs) {
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path.transform([Math.cos(randomRotation), -Math.sin(randomRotation), randomHorizontalTranslation,
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Math.sin(randomRotation), Math.cos(randomRotation), randomVerticalTranslation,
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0, 0, 1 ]);
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paint.setColor(paintColor);
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skcanvas.drawPath(path, paint);
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}
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surface.flush();
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// Record perf data: measure frame times, memory usage
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const currentFrameTimeMs = performance.now();
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frameTimesMs[currentFrameNumber] = currentFrameTimeMs - previousFrameTimeMs;
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previousFrameTimeMs = currentFrameTimeMs;
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resourceCacheUsageBytes[currentFrameNumber] = grContext.getResourceCacheUsageBytes();
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usedJSHeapSizesBytes[currentFrameNumber] = window.performance.memory.totalJSHeapSize;
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currentFrameNumber++;
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const timeSinceStart = performance.now() - startTimeMs;
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if (currentFrameNumber >= MAX_FRAMES || timeSinceStart >= MAX_SAMPLE_MS) {
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window._perfData = {
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frames_ms: Array.from(frameTimesMs).slice(0, currentFrameNumber),
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resourceCacheUsage_bytes: Array.from(resourceCacheUsageBytes).slice(0, currentFrameNumber),
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usedJSHeapSizes_bytes: Array.from(usedJSHeapSizesBytes).slice(0, currentFrameNumber),
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};
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window._perfDone = true;
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return;
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}
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window.requestAnimationFrame(drawFrame);
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}
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window.requestAnimationFrame(drawFrame);
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});
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console.log('Perf is ready');
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window._perfReady = true;
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}
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function svgToPathAndFillColorPairs(svgElement, CanvasKit) {
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const pathElements = Array.from(svgElement.getElementsByTagName('path'));
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return pathElements.map((path) => [
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CanvasKit.MakePathFromSVGString(path.getAttribute("d")),
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CanvasKit.parseColorString(path.getAttribute("fill")??'#000000')
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]);
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}
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function getSurface(CanvasKit) {
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let surface;
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if (window.location.hash.indexOf('gpu') !== -1) {
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surface = CanvasKit.MakeWebGLCanvasSurface('complex-path');
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if (!surface) {
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window._error = 'Could not make GPU surface';
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return null;
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}
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let c = document.getElementById('complex-path');
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// If CanvasKit was unable to instantiate a WebGL context, it will fallback
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// to CPU and add a ck-replaced class to the canvas element.
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if (c.classList.contains('ck-replaced')) {
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window._error = 'fell back to CPU';
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return null;
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}
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} else {
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surface = CanvasKit.MakeSWCanvasSurface('complex-path');
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if (!surface) {
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window._error = 'Could not make CPU surface';
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return null;
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}
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}
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return surface;
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}
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</script>
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</body>
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2020-10-07 20:09:22 +00:00
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</html>
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