| Index: tools/perf/page_sets/tough_animation_cases/css_transitions_staggered_triggering_by_inserting_style.html
|
| diff --git a/tools/perf/page_sets/tough_animation_cases/css_transitions_staggered_triggering_by_inserting_style.html b/tools/perf/page_sets/tough_animation_cases/css_transitions_staggered_triggering_by_inserting_style.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..8f0ee54ccea331bd1423e1ddbfd8efb9fb9733e1
|
| --- /dev/null
|
| +++ b/tools/perf/page_sets/tough_animation_cases/css_transitions_staggered_triggering_by_inserting_style.html
|
| @@ -0,0 +1,76 @@
|
| +<!DOCTYPE html>
|
| +<meta name="viewport" content="width=device-width, user-scalable=no">
|
| +<link rel="stylesheet" type="text/css" href="resources/tablet.css">
|
| +<link rel="stylesheet" type="text/css" href="resources/transition.css">
|
| +<script src="resources/perftesthelper.js"></script>
|
| +
|
| +<container id="container"></container>
|
| +
|
| +<script>
|
| +var N = PerfTestHelper.getN(1000);
|
| +var duration = 1000;
|
| +var targets = [];
|
| +var styles = [];
|
| +var keyframeValues = [0, 1];
|
| +
|
| +for (var i = 0; i < N; i++) {
|
| + var target = document.createElement('target');
|
| + target._keyframe = 0;
|
| + container.appendChild(target);
|
| + targets.push(target);
|
| +}
|
| +
|
| +function addNewClassStyle(step) {
|
| + // Clean up overwritten styles.
|
| + var i = 0;
|
| + for (; i < styles.length && styles[i].lastStep < step; i++) {
|
| + styles[i].style.remove();
|
| + }
|
| + styles.splice(0, i);
|
| +
|
| + var style = document.createElement('style');
|
| + var className = 'style' + step + 'keyframe';
|
| + style.textContent = '.' + className + '0 { opacity: ' + keyframeValues[0] + '; }\n';
|
| + style.textContent += '.' + className + '1 { opacity: ' + keyframeValues[1] + '; }\n';
|
| + container.appendChild(style);
|
| + styles.push({
|
| + style: style,
|
| + lastStep: step + N,
|
| + });
|
| +
|
| + return className;
|
| +}
|
| +
|
| +function startTransitions(startingTargets, startStep, endStep) {
|
| + var newClassName = addNewClassStyle(startStep, endStep);
|
| + startingTargets.forEach(function(startInfo) {
|
| + startInfo.target._keyframe ^= 1;
|
| + startInfo.target.className = newClassName + startInfo.target._keyframe;
|
| + startInfo.target.style.transitionDelay = -startInfo.fastForward + 'ms';
|
| + });
|
| +}
|
| +
|
| +requestAnimationFrame(function(time) {
|
| + var startTime = time - duration;
|
| + var previousStep = 0;
|
| +
|
| + function staggeredStart(time) {
|
| + var elapsed = time - startTime;
|
| + var targetStep = Math.floor(N * elapsed / duration);
|
| + var restartingTargets = [];
|
| + for (var step = Math.max(targetStep - N, previousStep); step < targetStep; step++) {
|
| + var stepStartTime = step / N * duration;
|
| + restartingTargets.push({
|
| + target: targets[step % N],
|
| + fastForward: elapsed - stepStartTime,
|
| + });
|
| + }
|
| + startTransitions(restartingTargets, targetStep);
|
| + previousStep = targetStep;
|
| + requestAnimationFrame(staggeredStart);
|
| + }
|
| + staggeredStart(time);
|
| +});
|
| +
|
| +PerfTestHelper.signalReady();
|
| +</script>
|
|
|
Chromium Code Reviews
Issue 399393002:
Add CSS Transitions performance tests (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src