Quelle test_device_reset.html Sprache: HTML

products/sources/formale Sprachen/C/Firefox/gfx/tests/chrome/test_device_reset.html

<!DOCTYPE html>
<html>

  <head>
    <meta charset="utf-8">
    <title>Test device reset</title>
    <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
    <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
  </head>
  <body>
    <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1274663">Mozilla Bug 1274663</a>
    <script>
      var importObj = {};

      var windows = SpecialPowers.Services.ww.getWindowEnumerator();
      var windowutils;
      while (windows.hasMoreElements()) {
        windowutils = windows.getNext().windowUtils;
      }

      const PAGE_WIDTH = 200;
      const PAGE_HEIGHT = 200;

      // Helper functions

      function testCompositor(ctx) {
        takeWindowSnapshot(ctx);
        var testPassed = true;

        if (!verifyCanvasRendering(ctx)) {
          testPassed = false;
        }

        return testPassed;
      }

      function testPixel(ctx, x, y, r, g, b, a, fuzz) {
        var data = ctx.getImageData(x, y, 1, 1);

        if (Math.abs(data.data[0] - r) <= fuzz &&
            Math.abs(data.data[1] - g) <= fuzz &&
            Math.abs(data.data[2] - b) <= fuzz &&
            Math.abs(data.data[3] - a) <= fuzz) {
          return true;
        }
        return false;
      }

      function verifyCanvasRendering(ctx) {
        return testPixel(ctx, 20, 20, 140, 25, 86, 255, 0);
      }

      function takeWindowSnapshot(ctx) {
        var flags = ctx.DRAWWINDOW_DRAW_CARET | ctx.DRAWWINDOW_DRAW_VIEW | ctx.DRAWWINDOW_USE_WIDGET_LAYERS;
        ctx.drawWindow(window, 0, 0, PAGE_WIDTH, PAGE_HEIGHT, "rgb(140,25,86)", flags);
      }

      function createCanvas() {
        let canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");

        canvas.setAttribute("width", PAGE_WIDTH + "px");
        canvas.setAttribute("height", PAGE_HEIGHT + "px");

        return canvas;
      }

      // Test runner code
      windowutils.triggerDeviceReset();

      SimpleTest.waitForExplicitFinish();
      window.addEventListener("MozAfterPaint", function paintHandle() {
         // Add more latency before calling runCanvasTest()
         // runCanvasTest() needs to be called after gecko's device reset handling.
         // Since Bug 1757879 fix, the triggerDeviceReset() does the device reset
         // handling asynchronously.
         window.requestAnimationFrame(() => {
           runCanvasTest();
        });
        window.removeEventListener("MozAfterPaint", paintHandle);
      });

      function runCanvasTest() {
        const canvas = createCanvas();
        const ctx = canvas.getContext("2d");
        document.body.appendChild(canvas);

        ok(testCompositor(ctx), "Canvas did not get rendered after device reset");
        SimpleTest.finish();
      }
    </script>
  </body>
</html>

Messung V0.5

¤ Dauer der Verarbeitung: 0.19 Sekunden (vorverarbeitet) ¤

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Cephes Mathematical Library

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