Quelle test_has_transparency.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/image/test/mochitest/test_has_transparency.html

<!DOCTYPE HTML>
<html>

<head>
  <title>Test for Bug 1089880</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/WindowSnapshot.js"></script>
  <script type="application/javascript" src="imgutils.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1089880">Mozilla Bug 1089880</a>
<p id="display"></p>
<div id="content">
</div>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 1089880 **/

SimpleTest.requestFlakyTimeout("Early failure timeout");
SimpleTest.waitForExplicitFinish();

const FAILURE_TIMEOUT = 120000; // Fail early after 120 seconds (2 minutes)

const Cc = SpecialPowers.Cc;
const Ci = SpecialPowers.Ci;
const gContent = document.getElementById("content");

var gCanvas;
var gCanvasCtx;
var gImg;
var gMyDecoderObserver;
var gIsTestFinished = false;
var gFiles;
var gCurrentFileIsTransparent = false;
var gHasTransparencyWasCalled = false;

function* testFiles() {
  // [A, B] where 'A' is the image and 'B' is whether it's transparent.

  // PNGs and GIFs may be transparent or not.
  yield ["red.png", false];
  yield ["transparent.png", true];
  yield ["animated-gif-finalframe.gif", false];
  yield ["transparent.gif", true];

  // GIFs with padding on the first frame are always transparent.
  yield ["first-frame-padding.gif", true];

  // JPEGs are never transparent.
  yield ["damon.jpg", false];

  // Most BMPs are not transparent. (The TestMetadata GTest, which will
  // eventually replace this test totally, has coverage for the kinds that can be
  // transparent.)
  yield ["opaque.bmp", false];

  // ICO files which contain BMPs have an additional type of transparency - the
  // AND mask - that warrants separate testing. (Although, after bug 1201796,
  // all ICOs are considered transparent.)
  yield ["ico-bmp-opaque.ico", true];
  yield ["ico-bmp-transparent.ico", true];

  // SVGs are always transparent.
  yield ["lime100x100.svg", true];
}

function loadNext() {
  var currentFile = "";
  gHasTransparencyWasCalled = false;
  let {done, value} = gFiles.next();
  if (done) {
    // We ran out of test files.
    cleanUpAndFinish();
    return;
  }
  [currentFile, gCurrentFileIsTransparent] = value;
  gImg.setAttribute("src", currentFile);
}

function onHasTransparency() {
  gHasTransparencyWasCalled = true;
}

function onDecodeComplete() {
  if (!gCurrentFileIsTransparent) {
    ok(!gHasTransparencyWasCalled,
       "onHasTransparency was not called for non-transparent file " + gImg.src);
  } else {
    ok(gHasTransparencyWasCalled,
       "onHasTransparency was called for transparent file " + gImg.src);
  }
  loadNext();
}

function onError() {
  if (gIsTestFinished) {
    return;
  }
  ok(false, "Should successfully load " + gImg.src);
  loadNext();
}

function onLoad() {
  if (gIsTestFinished) {
    return;
  }
  ok(true, "Should successfully load " + gImg.src);

  // Force decoding of the image.
  SimpleTest.executeSoon(function() {
    gCanvasCtx.drawImage(gImg, 0, 0);
  });
}

function failTest() {
  ok(false, "timing out after " + FAILURE_TIMEOUT + "ms. " +
            "currently displaying " + gImg.src);
  cleanUpAndFinish();
}

function cleanUpAndFinish() {
  if (gIsTestFinished) {
    return;
  }
  gIsTestFinished = true;
  let imgLoadingContent = SpecialPowers.wrap(gImg);
  imgLoadingContent.removeObserver(gMyDecoderObserver);
  SimpleTest.finish();
}

function main() {
  gFiles = testFiles();
  gCanvas = document.createElement('canvas');
  gCanvasCtx = gCanvas.getContext('2d');
  gImg = new Image();
  gImg.onload = onLoad;
  gImg.onerror = onError;

  // Create, customize & attach decoder observer.
  var observer = new ImageDecoderObserverStub();
  observer.hasTransparency = onHasTransparency;
  observer.decodeComplete = onDecodeComplete;
  gMyDecoderObserver =
    Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
      .createScriptedObserver(SpecialPowers.wrapCallbackObject(observer));
  let imgLoadingContent = SpecialPowers.wrap(gImg);
  imgLoadingContent.addObserver(gMyDecoderObserver);

  // We want to test the cold loading behavior, so clear cache in case an
  // earlier test got our image in there already.
  clearAllImageCaches();

  // Load the first image.
  loadNext();

  // In case something goes wrong, fail earlier than mochitest timeout,
  // and with more information.
  setTimeout(failTest, FAILURE_TIMEOUT);
}

window.onload = main;

</script>
</pre>
</body>
</html>

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