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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.
*/
importScripts("../../js/tests/canvas-tests-utils.js");
self.onmessage = function(e) {
canvas = new OffscreenCanvas(10, 10);
gl = canvas.getContext('webgl');
// call testValidContext() before checking for the extension, because this is where we check
// for the isContextLost() method, which we want to do regardless of the extension's presence.
if (!testValidContext())
self.postMessage("Test failed");
extension = gl.getExtension("WEBGL_lose_context");
// need an extension that exposes new API methods.
OES_vertex_array_object = gl.getExtension("OES_vertex_array_object");
if (extension == null || OES_vertex_array_object == null)
self.postMessage("Test failed");
// We need to initialize |uniformLocation| before losing context.
// Otherwise gl.getUniform() when context is lost will throw.
uniformLocation = gl.getUniformLocation(program, "tex");
extension.loseContext();
canvas.addEventListener("webglcontextlost", function() {
if (testLostContextWithoutRestore())
self.postMessage("Test passed");
else
self.postMessage("Test failed");
}, false);
}
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