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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /testing/web-platform/tests/common/third_party
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/common/third_party')
-rw-r--r--testing/web-platform/tests/common/third_party/reftest-analyzer.xhtml934
1 files changed, 934 insertions, 0 deletions
diff --git a/testing/web-platform/tests/common/third_party/reftest-analyzer.xhtml b/testing/web-platform/tests/common/third_party/reftest-analyzer.xhtml
new file mode 100644
index 0000000000..4c7b26511a
--- /dev/null
+++ b/testing/web-platform/tests/common/third_party/reftest-analyzer.xhtml
@@ -0,0 +1,934 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- -*- Mode: HTML; tab-width: 2; indent-tabs-mode: nil; -*- -->
+<!-- vim: set shiftwidth=2 tabstop=2 autoindent expandtab: -->
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+ - License, v. 2.0. If a copy of the MPL was not distributed with this
+ - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<!--
+
+Features to add:
+* make the left and right parts of the viewer independently scrollable
+* make the test list filterable
+** default to only showing unexpecteds
+* add other ways to highlight differences other than circling?
+* add zoom/pan to images
+* Add ability to load log via XMLHttpRequest (also triggered via URL param)
+* color the test list based on pass/fail and expected/unexpected/random/skip
+* ability to load multiple logs ?
+** rename them by clicking on the name and editing
+** turn the test list into a collapsing tree view
+** move log loading into popup from viewer UI
+
+-->
+<!DOCTYPE html>
+<html lang="en-US" xml:lang="en-US" xmlns="http://www.w3.org/1999/xhtml">
+<head>
+ <title>Reftest analyzer</title>
+ <style type="text/css"><![CDATA[
+
+ html, body { margin: 0; }
+ html { padding: 0; }
+ body { padding: 4px; }
+
+ #pixelarea, #itemlist, #images { position: absolute; }
+ #itemlist, #images { overflow: auto; }
+ #pixelarea { top: 0; left: 0; width: 320px; height: 84px; overflow: visible }
+ #itemlist { top: 84px; left: 0; width: 320px; bottom: 0; }
+ #images { top: 0; bottom: 0; left: 320px; right: 0; }
+
+ #leftpane { width: 320px; }
+ #images { position: fixed; top: 10px; left: 340px; }
+
+ form#imgcontrols { margin: 0; display: block; }
+
+ #itemlist > table { border-collapse: collapse; }
+ #itemlist > table > tbody > tr > td { border: 1px solid; padding: 1px; }
+ #itemlist td.activeitem { background-color: yellow; }
+
+ /*
+ #itemlist > table > tbody > tr.pass > td.url { background: lime; }
+ #itemlist > table > tbody > tr.fail > td.url { background: red; }
+ */
+
+ #magnification > svg { display: block; width: 84px; height: 84px; }
+
+ #pixelinfo { font: small sans-serif; position: absolute; width: 200px; left: 84px; }
+ #pixelinfo table { border-collapse: collapse; }
+ #pixelinfo table th { white-space: nowrap; text-align: left; padding: 0; }
+ #pixelinfo table td { font-family: monospace; padding: 0 0 0 0.25em; }
+
+ #pixelhint { display: inline; color: #88f; cursor: help; }
+ #pixelhint > * { display: none; position: absolute; margin: 8px 0 0 8px; padding: 4px; width: 400px; background: #ffa; color: black; box-shadow: 3px 3px 2px #888; z-index: 1; }
+ #pixelhint:hover { color: #000; }
+ #pixelhint:hover > * { display: block; }
+ #pixelhint p { margin: 0; }
+ #pixelhint p + p { margin-top: 1em; }
+
+ ]]></style>
+ <script type="text/javascript"><![CDATA[
+
+var XLINK_NS = "http://www.w3.org/1999/xlink";
+var SVG_NS = "http://www.w3.org/2000/svg";
+var IMAGE_NOT_AVAILABLE = "data:image/png;base64,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";
+
+var gPhases = null;
+
+var gIDCache = {};
+
+var gMagPixPaths = []; // 2D array of array-of-two <path> objects used in the pixel magnifier
+var gMagWidth = 5; // number of zoomed in pixels to show horizontally
+var gMagHeight = 5; // number of zoomed in pixels to show vertically
+var gMagZoom = 16; // size of the zoomed in pixels
+var gImage1Data; // ImageData object for the reference image
+var gImage2Data; // ImageData object for the test output image
+var gFlashingPixels = []; // array of <path> objects that should be flashed due to pixel color mismatch
+var gParams;
+
+function ID(id) {
+ if (!(id in gIDCache))
+ gIDCache[id] = document.getElementById(id);
+ return gIDCache[id];
+}
+
+function hash_parameters() {
+ var result = { };
+ var params = window.location.hash.substr(1).split(/[&;]/);
+ for (var i = 0; i < params.length; i++) {
+ var parts = params[i].split("=");
+ result[parts[0]] = unescape(unescape(parts[1]));
+ }
+ return result;
+}
+
+function load() {
+ gPhases = [ ID("entry"), ID("loading"), ID("viewer") ];
+ build_mag();
+ gParams = hash_parameters();
+ if (gParams.log) {
+ show_phase("loading");
+ process_log(gParams.log);
+ } else if (gParams.logurl) {
+ show_phase("loading");
+ var req = new XMLHttpRequest();
+ req.onreadystatechange = function() {
+ if (req.readyState === 4) {
+ process_log(req.responseText);
+ }
+ };
+ req.open('GET', gParams.logurl, true);
+ req.send();
+ }
+ window.addEventListener('keypress', handle_keyboard_shortcut);
+ window.addEventListener('keydown', handle_keydown);
+ ID("image1").addEventListener('error', image_load_error);
+ ID("image2").addEventListener('error', image_load_error);
+}
+
+function image_load_error(e) {
+ e.target.setAttributeNS(XLINK_NS, "xlink:href", IMAGE_NOT_AVAILABLE);
+}
+
+function build_mag() {
+ var mag = ID("mag");
+
+ var r = document.createElementNS(SVG_NS, "rect");
+ r.setAttribute("x", gMagZoom * -gMagWidth / 2);
+ r.setAttribute("y", gMagZoom * -gMagHeight / 2);
+ r.setAttribute("width", gMagZoom * gMagWidth);
+ r.setAttribute("height", gMagZoom * gMagHeight);
+ mag.appendChild(r);
+
+ mag.setAttribute("transform", "translate(" + (gMagZoom * (gMagWidth / 2) + 1) + "," + (gMagZoom * (gMagHeight / 2) + 1) + ")");
+
+ for (var x = 0; x < gMagWidth; x++) {
+ gMagPixPaths[x] = [];
+ for (var y = 0; y < gMagHeight; y++) {
+ var p1 = document.createElementNS(SVG_NS, "path");
+ p1.setAttribute("d", "M" + ((x - gMagWidth / 2) + 1) * gMagZoom + "," + (y - gMagHeight / 2) * gMagZoom + "h" + -gMagZoom + "v" + gMagZoom);
+ p1.setAttribute("stroke", "black");
+ p1.setAttribute("stroke-width", "1px");
+ p1.setAttribute("fill", "#aaa");
+
+ var p2 = document.createElementNS(SVG_NS, "path");
+ p2.setAttribute("d", "M" + ((x - gMagWidth / 2) + 1) * gMagZoom + "," + (y - gMagHeight / 2) * gMagZoom + "v" + gMagZoom + "h" + -gMagZoom);
+ p2.setAttribute("stroke", "black");
+ p2.setAttribute("stroke-width", "1px");
+ p2.setAttribute("fill", "#888");
+
+ mag.appendChild(p1);
+ mag.appendChild(p2);
+ gMagPixPaths[x][y] = [p1, p2];
+ }
+ }
+
+ var flashedOn = false;
+ setInterval(function() {
+ flashedOn = !flashedOn;
+ flash_pixels(flashedOn);
+ }, 500);
+}
+
+function show_phase(phaseid) {
+ for (var i in gPhases) {
+ var phase = gPhases[i];
+ phase.style.display = (phase.id == phaseid) ? "" : "none";
+ }
+
+ if (phase == "viewer")
+ ID("images").style.display = "none";
+}
+
+function fileentry_changed() {
+ show_phase("loading");
+ var input = ID("fileentry");
+ var files = input.files;
+ if (files.length > 0) {
+ // Only handle the first file; don't handle multiple selection.
+ // The parts of the log we care about are ASCII-only. Since we
+ // can ignore lines we don't care about, best to read in as
+ // iso-8859-1, which guarantees we don't get decoding errors.
+ var fileReader = new FileReader();
+ fileReader.onload = function(e) {
+ var log = null;
+
+ log = e.target.result;
+
+ if (log)
+ process_log(log);
+ else
+ show_phase("entry");
+ }
+ fileReader.readAsText(files[0], "iso-8859-1");
+ }
+ // So the user can process the same filename again (after
+ // overwriting the log), clear the value on the form input so we
+ // will always get an onchange event.
+ input.value = "";
+}
+
+function log_pasted() {
+ show_phase("loading");
+ var entry = ID("logentry");
+ var log = entry.value;
+ entry.value = "";
+ process_log(log);
+}
+
+var gTestItems;
+
+// This function is not used in production code, but can be invoked manually
+// from the devtools console in order to test changes to the parsing regexes
+// in process_log.
+function test_parsing() {
+ // Note that the logs in these testcases have been manually edited to strip
+ // out stuff for brevity.
+ var testcases = [
+ { "name": "empty log",
+ "log": "",
+ "expected": { "pass": 0, "unexpected": 0, "random": 0, "skip": 0 },
+ "expected_images": 0,
+ },
+ { "name": "android log",
+ "log": `[task 2018-12-28T10:36:45.718Z] 10:36:45 INFO - REFTEST TEST-START | a == b
+[task 2018-12-28T10:36:45.719Z] 10:36:45 INFO - REFTEST TEST-LOAD | a | 78 / 275 (28%)
+[task 2018-12-28T10:36:56.138Z] 10:36:56 INFO - REFTEST TEST-LOAD | b | 78 / 275 (28%)
+[task 2018-12-28T10:37:06.559Z] 10:37:06 INFO - REFTEST TEST-UNEXPECTED-FAIL | a == b | image comparison, max difference: 255, number of differing pixels: 5950
+[task 2018-12-28T10:37:06.568Z] 10:37:06 INFO - REFTEST IMAGE 1 (TEST): data:image/png;base64,
+[task 2018-12-28T10:37:06.577Z] 10:37:06 INFO - REFTEST IMAGE 2 (REFERENCE): data:image/png;base64,
+[task 2018-12-28T10:37:06.577Z] 10:37:06 INFO - REFTEST INFO | Saved log: stuff trimmed here
+[task 2018-12-28T10:37:06.582Z] 10:37:06 INFO - REFTEST TEST-END | a == b
+[task 2018-12-28T10:37:06.583Z] 10:37:06 INFO - REFTEST TEST-START | a2 == b2
+[task 2018-12-28T10:37:06.583Z] 10:37:06 INFO - REFTEST TEST-LOAD | a2 | 79 / 275 (28%)
+[task 2018-12-28T10:37:06.584Z] 10:37:06 INFO - REFTEST TEST-LOAD | b2 | 79 / 275 (28%)
+[task 2018-12-28T10:37:16.982Z] 10:37:16 INFO - REFTEST TEST-PASS | a2 == b2 | image comparison, max difference: 0, number of differing pixels: 0
+[task 2018-12-28T10:37:16.982Z] 10:37:16 INFO - REFTEST TEST-END | a2 == b2`,
+ "expected": { "pass": 1, "unexpected": 1, "random": 0, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "local reftest run (Linux)",
+ "log": `REFTEST TEST-START | file:///a == file:///b
+REFTEST TEST-LOAD | file:///a | 73 / 86 (84%)
+REFTEST TEST-LOAD | file:///b | 73 / 86 (84%)
+REFTEST TEST-PASS | file:///a == file:///b | image comparison, max difference: 0, number of differing pixels: 0
+REFTEST TEST-END | file:///a == file:///b`,
+ "expected": { "pass": 1, "unexpected": 0, "random": 0, "skip": 0 },
+ "expected_images": 0,
+ },
+ { "name": "wpt reftests (Linux automation)",
+ "log": `16:50:43 INFO - TEST-START | /a
+16:50:43 INFO - PID 4276 | 1548694243694 Marionette INFO Testing http://web-platform.test:8000/a == http://web-platform.test:8000/b
+16:50:43 INFO - PID 4276 | 1548694243963 Marionette INFO No differences allowed
+16:50:44 INFO - TEST-PASS | /a | took 370ms
+16:50:44 INFO - TEST-START | /a2
+16:50:44 INFO - PID 4276 | 1548694244066 Marionette INFO Testing http://web-platform.test:8000/a2 == http://web-platform.test:8000/b2
+16:50:44 INFO - PID 4276 | 1548694244792 Marionette INFO No differences allowed
+16:50:44 INFO - PID 4276 | 1548694244792 Marionette INFO Found 28 pixels different, maximum difference per channel 14
+16:50:44 INFO - TEST-UNEXPECTED-FAIL | /a2 | Testing http://web-platform.test:8000/a2 == http://web-platform.test:8000/b2
+16:50:44 INFO - REFTEST IMAGE 1 (TEST): data:image/png;base64,
+16:50:44 INFO - REFTEST IMAGE 2 (REFERENCE): data:image/png;base64,
+16:50:44 INFO - TEST-INFO took 840ms`,
+ "expected": { "pass": 1, "unexpected": 1, "random": 0, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "windows log",
+ "log": `12:17:14 INFO - REFTEST TEST-START | a == b
+12:17:14 INFO - REFTEST TEST-LOAD | a | 1603 / 2053 (78%)
+12:17:14 INFO - REFTEST TEST-LOAD | b | 1603 / 2053 (78%)
+12:17:14 INFO - REFTEST TEST-PASS(EXPECTED RANDOM) | a == b | image comparison, max difference: 0, number of differing pixels: 0
+12:17:14 INFO - REFTEST TEST-END | a == b
+12:17:14 INFO - REFTEST TEST-START | a2 == b2
+12:17:14 INFO - REFTEST TEST-LOAD | a2 | 1604 / 2053 (78%)
+12:17:14 INFO - REFTEST TEST-LOAD | b2 | 1604 / 2053 (78%)
+12:17:14 INFO - REFTEST TEST-UNEXPECTED-FAIL | a2 == b2 | image comparison, max difference: 255, number of differing pixels: 9976
+12:17:14 INFO - REFTEST IMAGE 1 (TEST): data:image/png;base64,
+12:17:14 INFO - REFTEST IMAGE 2 (REFERENCE): data:image/png;base64,
+12:17:14 INFO - REFTEST INFO | Saved log: stuff trimmed here
+12:17:14 INFO - REFTEST TEST-END | a2 == b2
+12:01:09 INFO - REFTEST TEST-START | a3 == b3
+12:01:09 INFO - REFTEST TEST-LOAD | a3 | 66 / 189 (34%)
+12:01:09 INFO - REFTEST TEST-LOAD | b3 | 66 / 189 (34%)
+12:01:09 INFO - REFTEST TEST-KNOWN-FAIL | a3 == b3 | image comparison, max difference: 255, number of differing pixels: 9654
+12:01:09 INFO - REFTEST TEST-END | a3 == b3`,
+ "expected": { "pass": 1, "unexpected": 1, "random": 1, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "webrender wrench log (windows)",
+ "log": `[task 2018-12-29T04:29:48.800Z] REFTEST a == b
+[task 2018-12-29T04:29:48.984Z] REFTEST a2 == b2
+[task 2018-12-29T04:29:49.053Z] REFTEST TEST-UNEXPECTED-FAIL | a2 == b2 | image comparison, max difference: 255, number of differing pixels: 3128
+[task 2018-12-29T04:29:49.053Z] REFTEST IMAGE 1 (TEST): data:image/png;
+[task 2018-12-29T04:29:49.053Z] REFTEST IMAGE 2 (REFERENCE): data:image/png;
+[task 2018-12-29T04:29:49.053Z] REFTEST TEST-END | a2 == b2`,
+ "expected": { "pass": 0, "unexpected": 1, "random": 0, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "wpt reftests (Linux local; Bug 1530008)",
+ "log": `SUITE-START | Running 1 tests
+TEST-START | /css/css-backgrounds/border-image-6.html
+TEST-UNEXPECTED-FAIL | /css/css-backgrounds/border-image-6.html | Testing http://web-platform.test:8000/css/css-backgrounds/border-image-6.html == http://web-platform.test:8000/css/css-backgrounds/border-image-6-ref.html
+REFTEST IMAGE 1 (TEST): data:image/png;base64,
+REFTEST IMAGE 2 (REFERENCE): data:image/png;base64,
+TEST-INFO took 425ms
+SUITE-END | took 2s`,
+ "expected": { "pass": 0, "unexpected": 1, "random": 0, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "wpt reftests (taskcluster log from macOS CI)",
+ "log": `[task 2020-06-26T01:35:29.065Z] 01:35:29 INFO - TEST-START | /html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values.html
+[task 2020-06-26T01:35:29.065Z] 01:35:29 INFO - PID 1353 | 1593135329040 Marionette INFO Testing http://web-platform.test:8000/html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values.html == http://web-platform.test:8000/html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values-ref.html
+[task 2020-06-26T01:35:29.673Z] 01:35:29 INFO - PID 1353 | 1593135329633 Marionette INFO No differences allowed
+[task 2020-06-26T01:35:29.726Z] 01:35:29 INFO - TEST-KNOWN-INTERMITTENT-FAIL | /html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values.html | took 649ms
+[task 2020-06-26T01:35:29.726Z] 01:35:29 INFO - REFTEST IMAGE 1 (TEST): data:image/png;
+[task 2020-06-26T01:35:29.726Z] 01:35:29 INFO - REFTEST IMAGE 2 (REFERENCE): data:image/png;`,
+ "expected": { "pass": 0, "unexpected": 0, "random": 1, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "wpt reftests (taskcluster log from Windows CI)",
+ "log": `[task 2020-06-26T01:41:19.205Z] 01:41:19 INFO - TEST-START | /html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values.html
+[task 2020-06-26T01:41:19.214Z] 01:41:19 INFO - PID 5920 | 1593135679202 Marionette WARN [24] http://web-platform.test:8000/css/WOFF2/metadatadisplay-schema-license-022-ref.xht overflows viewport (width: 783, height: 731)
+[task 2020-06-26T01:41:19.214Z] 01:41:19 INFO - PID 9692 | 1593135679208 Marionette INFO Testing http://web-platform.test:8000/html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values.html == http://web-platform.test:8000/html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values-ref.html
+[task 2020-06-26T01:41:19.638Z] 01:41:19 INFO - PID 9692 | 1593135679627 Marionette INFO No differences allowed
+[task 2020-06-26T01:41:19.688Z] 01:41:19 INFO - TEST-KNOWN-INTERMITTENT-PASS | /html/rendering/non-replaced-elements/the-page/iframe-scrolling-attribute-values.html | took 474ms
+[task 2020-06-26T01:41:19.688Z] 01:41:19 INFO - REFTEST IMAGE 1 (TEST): data:image/png;
+[task 2020-06-26T01:41:19.689Z] 01:41:19 INFO - REFTEST IMAGE 2 (REFERENCE): data:image/png;`,
+ "expected": { "pass": 1, "unexpected": 0, "random": 1, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "local reftest run with timestamps (Linux; Bug 1167712)",
+ "log": ` 0:05.21 REFTEST TEST-START | a
+ 0:05.21 REFTEST REFTEST TEST-LOAD | a | 0 / 1 (0%)
+ 0:05.27 REFTEST REFTEST TEST-LOAD | b | 0 / 1 (0%)
+ 0:05.66 REFTEST TEST-UNEXPECTED-FAIL | a | image comparison (==), max difference: 106, number of differing pixels: 800
+ 0:05.67 REFTEST REFTEST IMAGE 1 (TEST): data:image/png;base64,
+ 0:05.67 REFTEST REFTEST IMAGE 2 (REFERENCE): data:image/png;base64,
+ 0:05.73 REFTEST REFTEST TEST-END | a`,
+ "expected": { "pass": 0, "unexpected": 1, "random": 0, "skip": 0 },
+ "expected_images": 2,
+ },
+ { "name": "reftest run with whitespace compressed (Treeherder; Bug 1084322)",
+ "log": ` REFTEST TEST-START | a
+REFTEST TEST-LOAD | a | 0 / 1 (0%)
+REFTEST TEST-LOAD | b | 0 / 1 (0%)
+REFTEST TEST-UNEXPECTED-FAIL | a | image comparison (==), max difference: 106, number of differing pixels: 800
+REFTEST REFTEST IMAGE 1 (TEST): data:image/png;base64,
+REFTEST REFTEST IMAGE 2 (REFERENCE): data:image/png;base64,
+REFTEST REFTEST TEST-END | a`,
+ "expected": { "pass": 0, "unexpected": 1, "random": 0, "skip": 0 },
+ "expected_images": 2,
+ },
+ ];
+
+ var current_test = 0;
+
+ // Override the build_viewer function invoked at the end of process_log to
+ // actually just check the results of parsing.
+ build_viewer = function() {
+ var expected = testcases[current_test].expected;
+ var expected_images = testcases[current_test].expected_images;
+ for (var result of gTestItems) {
+ for (let type in expected) { // type is "pass", "unexpected" etc.
+ if (result[type]) {
+ expected[type]--;
+ }
+ }
+ }
+ var failed = false;
+ for (let type in expected) {
+ if (expected[type] != 0) {
+ console.log(`Failure: for testcase ${testcases[current_test].name} got ${expected[type]} fewer ${type} results than expected!`);
+ failed = true;
+ }
+ }
+
+ let total_images = 0;
+ for (var result of gTestItems) {
+ total_images += result.images.length;
+ }
+ if (total_images !== expected_images) {
+ console.log(`Failure: for testcase ${testcases[current_test].name} got ${total_images} images, expected ${expected_images}`);
+ failed = true;
+ }
+
+ if (!failed) {
+ console.log(`Success for testcase ${testcases[current_test].name}`);
+ }
+ };
+
+ while (current_test < testcases.length) {
+ process_log(testcases[current_test].log);
+ current_test++;
+ }
+}
+
+function process_log(contents) {
+ var lines = contents.split(/[\r\n]+/);
+ gTestItems = [];
+ for (var j in lines) {
+
+ // !!!!!!
+ // When making any changes to this code, please add a test to the
+ // test_parsing function above, and ensure all existing tests pass.
+ // !!!!!!
+
+ var line = lines[j];
+ // Ignore duplicated output in logcat.
+ if (line.match(/I\/Gecko.*?REFTEST/))
+ continue;
+ var match = line.match(/^.*?(?:REFTEST\s+)+(.*)$/);
+ if (!match) {
+ // WPT reftests don't always have the "REFTEST" prefix but do have
+ // mozharness prefixing. Trying to match both prefixes optionally with a
+ // single regex either makes an unreadable mess or matches everything so
+ // we do them separately.
+ match = line.match(/^(?:.*? (?:INFO|ERROR) -\s+)(.*)$/);
+ }
+ if (match)
+ line = match[1];
+ match = line.match(/^(TEST-PASS|TEST-UNEXPECTED-PASS|TEST-FAIL|TEST-KNOWN-FAIL|TEST-UNEXPECTED-FAIL|TEST-DEBUG-INFO|TEST-KNOWN-INTERMITTENT-FAIL|TEST-KNOWN-INTERMITTENT-PASS)(\(EXPECTED RANDOM\)|) \| ([^\|]+)(?: \|(.*)|$)/);
+ if (match) {
+ var state = match[1];
+ var random = match[2];
+ var url = match[3];
+ var extra = match[4];
+ gTestItems.push(
+ {
+ pass: !state.match(/DEBUG-INFO$|FAIL$/),
+ // only one of the following three should ever be true
+ unexpected: !!state.match(/^TEST-UNEXPECTED/),
+ random: (random == "(EXPECTED RANDOM)" || state == "TEST-KNOWN-INTERMITTENT-FAIL" || state == "TEST-KNOWN-INTERMITTENT-PASS"),
+ skip: (extra == " (SKIP)"),
+ url: url,
+ images: [],
+ imageLabels: []
+ });
+ continue;
+ }
+ match = line.match(/^IMAGE([^:]*): (data:.*)$/);
+ if (match) {
+ var item = gTestItems[gTestItems.length - 1];
+ item.images.push(match[2]);
+ item.imageLabels.push(match[1]);
+ }
+ }
+
+ build_viewer();
+}
+
+function build_viewer() {
+ if (gTestItems.length == 0) {
+ show_phase("entry");
+ return;
+ }
+
+ var cell = ID("itemlist");
+ while (cell.childNodes.length > 0)
+ cell.removeChild(cell.childNodes[cell.childNodes.length - 1]);
+
+ var table = document.createElement("table");
+ var tbody = document.createElement("tbody");
+ table.appendChild(tbody);
+
+ for (var i in gTestItems) {
+ var item = gTestItems[i];
+
+ // optional url filter for only showing unexpected results
+ if (parseInt(gParams.only_show_unexpected) && !item.unexpected)
+ continue;
+
+ // XXX regardless skip expected pass items until we have filtering UI
+ if (item.pass && !item.unexpected)
+ continue;
+
+ var tr = document.createElement("tr");
+ var rowclass = item.pass ? "pass" : "fail";
+ var td;
+ var text;
+
+ td = document.createElement("td");
+ text = "";
+ if (item.unexpected) { text += "!"; rowclass += " unexpected"; }
+ if (item.random) { text += "R"; rowclass += " random"; }
+ if (item.skip) { text += "S"; rowclass += " skip"; }
+ td.appendChild(document.createTextNode(text));
+ tr.appendChild(td);
+
+ td = document.createElement("td");
+ td.id = "item" + i;
+ td.className = "url";
+ // Only display part of URL after "/mozilla/".
+ var match = item.url.match(/\/mozilla\/(.*)/);
+ text = document.createTextNode(match ? match[1] : item.url);
+ if (item.images.length > 0) {
+ var a = document.createElement("a");
+ a.href = "javascript:show_images(" + i + ")";
+ a.appendChild(text);
+ td.appendChild(a);
+ } else {
+ td.appendChild(text);
+ }
+ tr.appendChild(td);
+
+ tbody.appendChild(tr);
+ }
+
+ cell.appendChild(table);
+
+ show_phase("viewer");
+}
+
+function get_image_data(src, whenReady) {
+ var img = new Image();
+ img.onload = function() {
+ var canvas = document.createElement("canvas");
+ canvas.width = img.naturalWidth;
+ canvas.height = img.naturalHeight;
+
+ var ctx = canvas.getContext("2d");
+ ctx.drawImage(img, 0, 0);
+
+ whenReady(ctx.getImageData(0, 0, img.naturalWidth, img.naturalHeight));
+ };
+ img.src = src;
+}
+
+function sync_svg_size(imageData) {
+ // We need the size of the 'svg' and its 'image' elements to match the size
+ // of the ImageData objects that we're going to read pixels from or else our
+ // magnify() function will be very broken.
+ ID("svg").setAttribute("width", imageData.width);
+ ID("svg").setAttribute("height", imageData.height);
+}
+
+function show_images(i) {
+ var item = gTestItems[i];
+ var cell = ID("images");
+
+ // Remove activeitem class from any existing elements
+ var activeItems = document.querySelectorAll(".activeitem");
+ for (var activeItemIdx = activeItems.length; activeItemIdx-- != 0;) {
+ activeItems[activeItemIdx].classList.remove("activeitem");
+ }
+
+ ID("item" + i).classList.add("activeitem");
+ ID("image1").style.display = "";
+ ID("image2").style.display = "none";
+ ID("diffrect").style.display = "none";
+ ID("imgcontrols").reset();
+ ID("pixel-differences").textContent = "";
+
+ ID("image1").setAttributeNS(XLINK_NS, "xlink:href", item.images[0]);
+ // Making the href be #image1 doesn't seem to work
+ ID("feimage1").setAttributeNS(XLINK_NS, "xlink:href", item.images[0]);
+ if (item.images.length == 1) {
+ ID("imgcontrols").style.display = "none";
+ } else {
+ ID("imgcontrols").style.display = "";
+
+ ID("image2").setAttributeNS(XLINK_NS, "xlink:href", item.images[1]);
+ // Making the href be #image2 doesn't seem to work
+ ID("feimage2").setAttributeNS(XLINK_NS, "xlink:href", item.images[1]);
+
+ ID("label1").textContent = 'Image ' + item.imageLabels[0];
+ ID("label2").textContent = 'Image ' + item.imageLabels[1];
+ }
+
+ cell.style.display = "";
+
+ let loaded = [false, false];
+
+ function images_loaded(id) {
+ loaded[id] = true;
+ if (loaded.every(x => x)) {
+ update_pixel_difference_text()
+ }
+ }
+
+ get_image_data(item.images[0], function(data) { gImage1Data = data; sync_svg_size(gImage1Data); images_loaded(0)});
+ get_image_data(item.images[1], function(data) { gImage2Data = data; images_loaded(1)});
+
+}
+
+function update_pixel_difference_text() {
+ let differenceText;
+ if (gImage1Data.height !== gImage2Data.height ||
+ gImage1Data.width !== gImage2Data.width) {
+ differenceText = "Images are different sizes"
+ } else {
+ let [numPixels, maxPerChannel] = get_pixel_differences();
+ if (!numPixels) {
+ differenceText = "Images are identical";
+ } else {
+ differenceText = `Maximum difference per channel ${maxPerChannel}, ${numPixels} pixels differ`;
+ }
+ }
+ // Disable this for now, because per bug 1633504, the numbers may be
+ // inaccurate and dependent on the browser's configuration.
+ // ID("pixel-differences").textContent = differenceText;
+}
+
+function get_pixel_differences() {
+ let numPixels = 0;
+ let maxPerChannel = 0;
+ for (var i=0; i<gImage1Data.data.length; i+=4) {
+ let r1 = gImage1Data.data[i];
+ let r2 = gImage2Data.data[i];
+ let g1 = gImage1Data.data[i+1];
+ let g2 = gImage2Data.data[i+1];
+ let b1 = gImage1Data.data[i+2];
+ let b2 = gImage2Data.data[i+2];
+ // Ignore alpha.
+ if (r1 == r2 && g1 == g2 && b1 == b2) {
+ continue;
+ }
+ numPixels += 1;
+ let maxDiff = Math.max(Math.abs(r1-r2),
+ Math.abs(g1-g2),
+ Math.abs(b1-b2));
+ if (maxDiff > maxPerChannel) {
+ maxPerChannel = maxDiff
+ }
+ }
+ return [numPixels, maxPerChannel];
+}
+
+function show_image(i) {
+ if (i == 1) {
+ ID("image1").style.display = "";
+ ID("image2").style.display = "none";
+ } else {
+ ID("image1").style.display = "none";
+ ID("image2").style.display = "";
+ }
+}
+
+function handle_keyboard_shortcut(event) {
+ switch (event.charCode) {
+ case 49: // "1" key
+ document.getElementById("radio1").checked = true;
+ show_image(1);
+ break;
+ case 50: // "2" key
+ document.getElementById("radio2").checked = true;
+ show_image(2);
+ break;
+ case 100: // "d" key
+ document.getElementById("differences").click();
+ break;
+ case 112: // "p" key
+ shift_images(-1);
+ break;
+ case 110: // "n" key
+ shift_images(1);
+ break;
+ }
+}
+
+function handle_keydown(event) {
+ switch (event.keyCode) {
+ case 37: // left arrow
+ move_pixel(-1, 0);
+ break;
+ case 38: // up arrow
+ move_pixel(0,-1);
+ break;
+ case 39: // right arrow
+ move_pixel(1, 0);
+ break;
+ case 40: // down arrow
+ move_pixel(0, 1);
+ break;
+ }
+}
+
+function shift_images(dir) {
+ var activeItem = document.querySelector(".activeitem");
+ if (!activeItem) {
+ return;
+ }
+ for (var elm = activeItem; elm; elm = elm.parentElement) {
+ if (elm.tagName != "tr") {
+ continue;
+ }
+ elm = dir > 0 ? elm.nextElementSibling : elm.previousElementSibling;
+ if (elm) {
+ elm.getElementsByTagName("a")[0].click();
+ }
+ return;
+ }
+}
+
+function show_differences(cb) {
+ ID("diffrect").style.display = cb.checked ? "" : "none";
+}
+
+function flash_pixels(on) {
+ var stroke = on ? "red" : "black";
+ var strokeWidth = on ? "2px" : "1px";
+ for (var i = 0; i < gFlashingPixels.length; i++) {
+ gFlashingPixels[i].setAttribute("stroke", stroke);
+ gFlashingPixels[i].setAttribute("stroke-width", strokeWidth);
+ }
+}
+
+function cursor_point(evt) {
+ var m = evt.target.getScreenCTM().inverse();
+ var p = ID("svg").createSVGPoint();
+ p.x = evt.clientX;
+ p.y = evt.clientY;
+ p = p.matrixTransform(m);
+ return { x: Math.floor(p.x), y: Math.floor(p.y) };
+}
+
+function hex2(i) {
+ return (i < 16 ? "0" : "") + i.toString(16);
+}
+
+function canvas_pixel_as_hex(data, x, y) {
+ var offset = (y * data.width + x) * 4;
+ var r = data.data[offset];
+ var g = data.data[offset + 1];
+ var b = data.data[offset + 2];
+ return "#" + hex2(r) + hex2(g) + hex2(b);
+}
+
+function hex_as_rgb(hex) {
+ return "rgb(" + [parseInt(hex.substring(1, 3), 16), parseInt(hex.substring(3, 5), 16), parseInt(hex.substring(5, 7), 16)] + ")";
+}
+
+function magnify(evt) {
+ var { x: x, y: y } = cursor_point(evt);
+ do_magnify(x, y);
+}
+
+function do_magnify(x, y) {
+ var centerPixelColor1, centerPixelColor2;
+
+ var dx_lo = -Math.floor(gMagWidth / 2);
+ var dx_hi = Math.floor(gMagWidth / 2);
+ var dy_lo = -Math.floor(gMagHeight / 2);
+ var dy_hi = Math.floor(gMagHeight / 2);
+
+ flash_pixels(false);
+ gFlashingPixels = [];
+ for (var j = dy_lo; j <= dy_hi; j++) {
+ for (var i = dx_lo; i <= dx_hi; i++) {
+ var px = x + i;
+ var py = y + j;
+ var p1 = gMagPixPaths[i + dx_hi][j + dy_hi][0];
+ var p2 = gMagPixPaths[i + dx_hi][j + dy_hi][1];
+ // Here we just use the dimensions of gImage1Data since we expect test
+ // and reference to have the same dimensions.
+ if (px < 0 || py < 0 || px >= gImage1Data.width || py >= gImage1Data.height) {
+ p1.setAttribute("fill", "#aaa");
+ p2.setAttribute("fill", "#888");
+ } else {
+ var color1 = canvas_pixel_as_hex(gImage1Data, x + i, y + j);
+ var color2 = canvas_pixel_as_hex(gImage2Data, x + i, y + j);
+ p1.setAttribute("fill", color1);
+ p2.setAttribute("fill", color2);
+ if (color1 != color2) {
+ gFlashingPixels.push(p1, p2);
+ p1.parentNode.appendChild(p1);
+ p2.parentNode.appendChild(p2);
+ }
+ if (i == 0 && j == 0) {
+ centerPixelColor1 = color1;
+ centerPixelColor2 = color2;
+ }
+ }
+ }
+ }
+ flash_pixels(true);
+ show_pixelinfo(x, y, centerPixelColor1, hex_as_rgb(centerPixelColor1), centerPixelColor2, hex_as_rgb(centerPixelColor2));
+}
+
+function show_pixelinfo(x, y, pix1rgb, pix1hex, pix2rgb, pix2hex) {
+ var pixelinfo = ID("pixelinfo");
+ ID("coords").textContent = [x, y];
+ ID("pix1hex").textContent = pix1hex;
+ ID("pix1rgb").textContent = pix1rgb;
+ ID("pix2hex").textContent = pix2hex;
+ ID("pix2rgb").textContent = pix2rgb;
+}
+
+function move_pixel(deltax, deltay) {
+ coords = ID("coords").textContent.split(',');
+ x = parseInt(coords[0]);
+ y = parseInt(coords[1]);
+ if (isNaN(x) || isNaN(y)) {
+ return;
+ }
+ x = x + deltax;
+ y = y + deltay;
+ if (x >= 0 && y >= 0 && x < gImage1Data.width && y < gImage1Data.height) {
+ do_magnify(x, y);
+ }
+}
+
+ ]]></script>
+
+</head>
+<body onload="load()">
+
+<div id="entry">
+
+<h1>Reftest analyzer: load reftest log</h1>
+
+<p>Either paste your log into this textarea:<br />
+<textarea cols="80" rows="10" id="logentry"/><br/>
+<input type="button" value="Process pasted log" onclick="log_pasted()" /></p>
+
+<p>... or load it from a file:<br/>
+<input type="file" id="fileentry" onchange="fileentry_changed()" />
+</p>
+</div>
+
+<div id="loading" style="display:none">Loading log...</div>
+
+<div id="viewer" style="display:none">
+ <div id="pixelarea">
+ <div id="pixelinfo">
+ <table>
+ <tbody>
+ <tr><th>Pixel at:</th><td colspan="2" id="coords"/></tr>
+ <tr><th>Image 1:</th><td id="pix1rgb"></td><td id="pix1hex"></td></tr>
+ <tr><th>Image 2:</th><td id="pix2rgb"></td><td id="pix2hex"></td></tr>
+ </tbody>
+ </table>
+ <div>
+ <div id="pixelhint">★
+ <div>
+ <p>Move the mouse over the reftest image on the right to show
+ magnified pixels on the left. The color information above is for
+ the pixel centered in the magnified view.</p>
+ <p>Image 1 is shown in the upper triangle of each pixel and Image 2
+ is shown in the lower triangle.</p>
+ </div>
+ </div>
+ </div>
+ </div>
+ <div id="magnification">
+ <svg xmlns="http://www.w3.org/2000/svg" width="84" height="84" shape-rendering="optimizeSpeed">
+ <g id="mag"/>
+ </svg>
+ </div>
+ </div>
+ <div id="itemlist"></div>
+ <div id="images" style="display:none">
+ <form id="imgcontrols">
+ <input id="radio1" type="radio" name="which" value="0" onchange="show_image(1)" checked="checked" /><label id="label1" title="1" for="radio1">Image 1</label>
+ <input id="radio2" type="radio" name="which" value="1" onchange="show_image(2)" /><label id="label2" title="2" for="radio2">Image 2</label>
+ <label><input id="differences" type="checkbox" onchange="show_differences(this)" />Circle differences</label>
+ </form>
+ <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="800" height="1000" id="svg">
+ <defs>
+ <!-- use sRGB to avoid loss of data -->
+ <filter id="showDifferences" x="0%" y="0%" width="100%" height="100%"
+ style="color-interpolation-filters: sRGB">
+ <feImage id="feimage1" result="img1" xlink:href="#image1" />
+ <feImage id="feimage2" result="img2" xlink:href="#image2" />
+ <!-- inv1 and inv2 are the images with RGB inverted -->
+ <feComponentTransfer result="inv1" in="img1">
+ <feFuncR type="linear" slope="-1" intercept="1" />
+ <feFuncG type="linear" slope="-1" intercept="1" />
+ <feFuncB type="linear" slope="-1" intercept="1" />
+ </feComponentTransfer>
+ <feComponentTransfer result="inv2" in="img2">
+ <feFuncR type="linear" slope="-1" intercept="1" />
+ <feFuncG type="linear" slope="-1" intercept="1" />
+ <feFuncB type="linear" slope="-1" intercept="1" />
+ </feComponentTransfer>
+ <!-- w1 will have non-white pixels anywhere that img2
+ is brighter than img1, and w2 for the reverse.
+ It would be nice not to have to go through these
+ intermediate states, but feComposite
+ type="arithmetic" can't transform the RGB channels
+ and leave the alpha channel untouched. -->
+ <feComposite result="w1" in="img1" in2="inv2" operator="arithmetic" k2="1" k3="1" />
+ <feComposite result="w2" in="img2" in2="inv1" operator="arithmetic" k2="1" k3="1" />
+ <!-- c1 will have non-black pixels anywhere that img2
+ is brighter than img1, and c2 for the reverse -->
+ <feComponentTransfer result="c1" in="w1">
+ <feFuncR type="linear" slope="-1" intercept="1" />
+ <feFuncG type="linear" slope="-1" intercept="1" />
+ <feFuncB type="linear" slope="-1" intercept="1" />
+ </feComponentTransfer>
+ <feComponentTransfer result="c2" in="w2">
+ <feFuncR type="linear" slope="-1" intercept="1" />
+ <feFuncG type="linear" slope="-1" intercept="1" />
+ <feFuncB type="linear" slope="-1" intercept="1" />
+ </feComponentTransfer>
+ <!-- c will be nonblack (and fully on) for every pixel+component where there are differences -->
+ <feComposite result="c" in="c1" in2="c2" operator="arithmetic" k2="255" k3="255" />
+ <!-- a will be opaque for every pixel with differences and transparent for all others -->
+ <feColorMatrix result="a" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0" />
+
+ <!-- a, dilated by 1 pixel -->
+ <feMorphology result="dila1" in="a" operator="dilate" radius="1" />
+ <!-- a, dilated by 2 pixels -->
+ <feMorphology result="dila2" in="dila1" operator="dilate" radius="1" />
+
+ <!-- all the pixels in the 2-pixel dilation of a but not in the 1-pixel dilation, to highlight the diffs -->
+ <feComposite result="highlight" in="dila2" in2="dila1" operator="out" />
+
+ <feFlood result="red" flood-color="red" />
+ <feComposite result="redhighlight" in="red" in2="highlight" operator="in" />
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