dom/canvas/test/webgl-conf/checkout/conformance/offscreencanvas/context-lost-restored-worker.js

   1 /*
   2 Copyright (c) 2019 The Khronos Group Inc.
   3 Use of this source code is governed by an MIT-style license that can be
   4 found in the LICENSE.txt file.
   5 */
   6
   7 importScripts("../../js/tests/canvas-tests-utils.js");
   8 self.onmessage = function(e) {
   9     if (!setupTest())
  10         self.postMessage("Test failed");
  11
  12     canvas.addEventListener("webglcontextlost", function(e) {
  13         if (!testLostContext(e))
  14             self.postMessage("Test failed");
  15         // restore the context after this event has exited.
  16         setTimeout(function() {
  17             // we didn't call prevent default so we should not be able to restore the context
  18             if (!compareGLError(gl.INVALID_OPERATION, "WEBGL_lose_context.restoreContext()"))
  19                 self.postMessage("Test failed");
  20             testLosingAndRestoringContext().then(function() {
  21                 self.postMessage("Test passed");
  22             }, function() {
  23                 self.postMessage("Test failed");
  24             });
  25         }, 0);
  26     });
  27     canvas.addEventListener("webglcontextrestored", function() {
  28         self.postMessage("Test failed");
  29     });
  30     allowRestore = false;
  31     contextLostEventFired = false;
  32     contextRestoredEventFired = false;
  33
  34     if (!testOriginalContext())
  35         self.postMessage("Test failed");
  36     WEBGL_lose_context.loseContext();
  37     // The context should be lost immediately.
  38     if (!gl.isContextLost())
  39         self.postMessage("Test failed");
  40     if (gl.getError() != gl.CONTEXT_LOST_WEBGL)
  41         self.postMessage("Test failed");
  42     if (gl.getError() != gl.NO_ERROR)
  43         self.postMessage("Test failed");
  44     // gl methods should be no-ops
  45     if (!compareGLError(gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTURE_CUBE_MAP)"))
  46         self.postMessage("Test failed");
  47     // but the event should not have been fired.
  48     if (contextLostEventFired)
  49         self.postMessage("Test failed");
  50 }
  51