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<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
<script src="../../js/tests/canvas-tests-utils.js"></script>
<script>
function init()
{
description("Tests behavior under a restored context for OffscreenCanvas.");
if (!window.OffscreenCanvas) {
testPassed("No OffscreenCanvas support");
finishTest();
return;
}
if (!setupTest()) {
testFailed("Cannot initialize test");
finishTest();
return;
}
canvas.addEventListener("webglcontextlost", function(e) {
if (!testLostContext(e)) {
testFailed("Some test failed");
finishTest();
return;
}
// restore the context after this event has exited.
setTimeout(function() {
// we didn't call prevent default so we should not be able to restore the context
if (!compareGLError(gl.INVALID_OPERATION, "WEBGL_lose_context.restoreContext()")) {
testFailed("Some test failed");
finishTest();
return;
}
testLosingAndRestoringContext().then(function(s) {
testPassed("Test passed");
finishTest();
return;
}, function(s) {
testFailed("Test failed: " + s);
finishTest();
return;
});
}, 0);
});
canvas.addEventListener("webglcontextrestored", function() {
testFailed("Some test failed");
finishTest();
return;
});
allowRestore = false;
contextLostEventFired = false;
contextRestoredEventFired = false;
if (!testOriginalContext()) {
testFailed("Some test failed");
finishTest();
return;
}
WEBGL_lose_context.loseContext();
// The context should be lost immediately.
shouldBeTrue("gl.isContextLost()");
shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL");
shouldBe("gl.getError()", "gl.NO_ERROR");
// gl methods should be no-ops
shouldBeTrue(compareGLError(gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTURE_CUBE_MAP)"));
// but the event should not have been fired.
shouldBeFalse("contextLostEventFired");
}
</script>
</head>
<body onload="init()">
<div id="description"></div>
<div id="console"></div>
</body>
</html>