Quelle test_bitmaprenderer.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/canvas/test/test_bitmaprenderer.html

<!DOCTYPE HTML>
<html>
<head>
<title>WebGL in OffscreenCanvas</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/WindowSnapshot.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
</head>
<body>
<script type="text/js-worker">
function ok(expect, msg) {
  postMessage({"type": "status", status: !!expect, msg: msg});
}

onmessage = function(event) {
  var bitmap = event.data.bitmap;
  ok(!!bitmap, "Get the ImageBitmap from the main script.");

  var offscreenCanvas = new OffscreenCanvas(64, 64);
  var ctx = offscreenCanvas.getContext('bitmaprenderer');
  ok(!!ctx, "Get bitmaprenderer context on worker.");

  ctx.transferFromImageBitmap(bitmap);
  var resultBitmap = offscreenCanvas.transferToImageBitmap();
  postMessage({"type": "bitmap", bitmap: resultBitmap}, [resultBitmap]);
}
</script>
<script>

SimpleTest.waitForExplicitFinish();

function createCanvas(width, height) {
  var htmlCanvas = document.createElement('canvas');
  htmlCanvas.width = width;
  htmlCanvas.height = height;
  document.body.appendChild(htmlCanvas);
  return htmlCanvas;
}

function runTest(canvasWidth, canvasHeight, nextTest) {
  var canvas1 = createCanvas(canvasWidth, canvasHeight);
  var ctx = canvas1.getContext("2d");
  ctx.fillStyle = "#00FF00";
  ctx.fillRect(0, 0, canvasWidth, canvasHeight);

  var canvasRef = createCanvas(canvasWidth, canvasHeight);
  var ctx = canvasRef.getContext("2d");
  // Clear with black transparent first
  ctx.fillStyle = "rgba(0, 0, 0, 0)";
  ctx.fillRect(0, 0, canvasWidth, canvasHeight);

  ctx.fillStyle = "#00FF00";
  ctx.fillRect(0, 0, canvasWidth, canvasHeight);

  createImageBitmap(canvas1).then(async function(bmp) {
    document.body.removeChild(canvas1);

    var canvas2 = createCanvas(90, 90);
    var ctx2 = canvas2.getContext("bitmaprenderer");
    ctx2.transferFromImageBitmap(bmp);

    ok(canvasRef.toDataURL() == canvas2.toDataURL(), "toDataURL should return same result.");

    // Exam render result
    canvasRef.style.display = "none";
    canvas2.style.display = "block";
    var snapshot = await snapshotWindow(window);

    canvasRef.style.display = "block";
    canvas2.style.display = "none";
    var snapshotRef = await snapshotWindow(window);

    // bitmaprenderers use an ImageLayer whereas a normal 2d canvas uses a canvas layer. This
    // can result in some anti-aliasing differences on the edge. We consider slight AA differences
    // to be reasonable when using different codepaths so fuzz a little bit.
    var fuzz = { numDifferentPixels:  0,
                 maxDifference: 0 };
    if (SpecialPowers.Services.appinfo.widgetToolkit == "android") {
      fuzz.maxDifference = 2;
      fuzz.numDifferentPixels = 131;
    }
    var results = compareSnapshots(snapshot, snapshotRef, true, fuzz);
    ok(results[0], "Screenshots should be the same");

    document.body.removeChild(canvasRef);
    document.body.removeChild(canvas2);

    nextTest();
  });
}

function createSolidGreenBitmap(width, height) {
  const canvas = createCanvas(width, height);
  const ctx = canvas.getContext("2d");
  ctx.fillStyle = "#00FF00";
  ctx.fillRect(0, 0, width, height);
  const bitmap = createImageBitmap(canvas);
  document.body.removeChild(canvas);
  return bitmap;
}

async function scaleTestCase(name, refWidth, refHeight, testWidth, testHeight, canvasWidth, canvasHeight) {
  const refBitmap = await createSolidGreenBitmap(refWidth, refHeight);
  const refCanvas = createCanvas(refWidth, refHeight);
  const refCtx = refCanvas.getContext("bitmaprenderer");
  refCtx.transferFromImageBitmap(refBitmap);
  is(refCanvas.width, refWidth, name + ": refCanvas width " + refCanvas.width + " is ref " + refWidth);
  is(refCanvas.height, refHeight, name + ": refCanvas height " + refCanvas.height + " is ref " + refHeight);
  const refSnapshot = await snapshotWindow(window);
  document.body.removeChild(refCanvas);

  const bitmap = await createSolidGreenBitmap(testWidth, testHeight);
  const canvas = createCanvas(canvasWidth, canvasHeight);
  const ctx = canvas.getContext("bitmaprenderer");
  ctx.transferFromImageBitmap(bitmap);
  is(canvas.width, testWidth, name + ": canvas width " + canvas.width + " is bitmap " + testWidth);
  is(canvas.height, testHeight, name + ": canvas height " + canvas.height + " is bitmap " + testHeight);
  if (refWidth !== testWidth) {
    canvas.width = refWidth;
    is(canvas.width, refWidth, name + ": canvas width " + canvas.width + " is ref " + refWidth);
  }
  if (refHeight !== testHeight) {
    canvas.height = refHeight;
    is(canvas.height, refHeight, name + ": canvas height " + canvas.height + " is ref " + refHeight);
  }
  const snapshot = await snapshotWindow(window);
  document.body.removeChild(canvas);

  const results = compareSnapshots(snapshot, refSnapshot, true);
  ok(results[0], name + ": screenshots should be the same");
  return Promise.resolve();
}

async function scaleTest() {
  await scaleTestCase("grow_unscaled", 64, 64, 64, 64, 32, 32); // Canvas grows, no scaling.
  await scaleTestCase("grow_downscaled", 64, 64, 128, 128, 32, 32); // Canvas grows, scales down.
  await scaleTestCase("grow_upscaled", 64, 64, 32, 32, 16, 16); // Canvas grows, scales up.
  await scaleTestCase("same_downscaled", 64, 64, 128, 128, 128, 128); // Canvas unchanged, scales down.
  await scaleTestCase("same_upscaled", 64, 64, 32, 32, 32, 32); // Canvas unchanged, scales up.
  await scaleTestCase("shrink_unscaled", 64, 64, 64, 64, 128, 128); // Canvas shrinks, no scaling.
  await scaleTestCase("shrink_downscaled", 64, 64, 128, 128, 256, 256); // Canvas shrinks, scales down.
  await scaleTestCase("shrink_upscaled", 64, 64, 32, 32, 256, 256); // Canvas shrinks, scales up.
  runTestOnWorker();
}

function runTestOnWorker() {
  var canvas1 = createCanvas(64, 64);
  var ctx = canvas1.getContext("2d");
  ctx.fillStyle = "#00FF00";
  ctx.fillRect(0, 0, 64, 64);

  var blob = new Blob(Array.prototype.map.call(document.querySelectorAll("script[type=\"text\/js-worker\"]"), function (oScript) { return oScript.textContent; }),{type: "text/javascript"});

  var worker = new Worker(window.URL.createObjectURL(blob));

  createImageBitmap(canvas1).then(function(bmp) {
    worker.postMessage({bitmap: bmp}, [bmp]);
    worker.onmessage = function(event) {
      if (event.data.type == "status") {
        ok(event.data.status, event.data.msg);
      } else if (event.data.type == "bitmap") {
        var canvas2 = createCanvas(64, 64);
        var ctx2 = canvas2.getContext('bitmaprenderer');
        ctx2.transferFromImageBitmap(event.data.bitmap);
        ok(canvas1.toDataURL() == canvas2.toDataURL(), 'toDataURL should be the same');
        SimpleTest.finish();
      }
    }
  });
}

runTest(64, 64, runTest.bind(this, 128, 128, scaleTest));

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

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