| <!-- |
| 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"> |
| <title>WebGL Origin Restrictions Conformance Tests for OffscreenCanvas</title> |
| <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> |
| </head> |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| <canvas id="canvas"></canvas> |
| <img id="img" style="display:none;"> |
| <script> |
| "use strict"; |
| var wtu = WebGLTestUtils; |
| |
| // Checks if function throws an exception. |
| function causedException(func) { |
| var hadException = false; |
| try { |
| func(); |
| } catch(e) { |
| hadException = true; |
| } |
| return hadException; |
| } |
| |
| var defaultImgUrl = "https://get.webgl.org/conformance-resources/opengl_logo.jpg"; |
| var localImgUrl = "../../../resources/opengl_logo.jpg"; |
| |
| var imgDomain; |
| var pageDomain; |
| |
| function imageLoaded(img) { |
| description("This test ensures WebGL implementations for OffscreenCanvas follow proper same-origin restrictions."); |
| |
| if (!window.OffscreenCanvas) { |
| testPassed("No OffscreenCanvas support"); |
| finishTest(); |
| return; |
| } |
| |
| assertMsg(img.width > 0 && img.height > 0, "img was loaded"); |
| imgDomain = wtu.getBaseDomain(wtu.getHost(img.src)); |
| pageDomain = wtu.getBaseDomain(window.location.host); |
| assertMsg(imgDomain != pageDomain, |
| "img domain (" + imgDomain + ") and page domain (" + pageDomain + ") are not the same."); |
| |
| function makeTexImage2D(gl, src) { |
| return function() { |
| gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, src); |
| }; |
| } |
| |
| function makeTexSubImage2D(gl, src) { |
| return function() { |
| gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, src); |
| }; |
| } |
| |
| function makeReadPixels(gl) { |
| return function() { |
| var buf = new Uint8Array(4); |
| gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, buf); |
| }; |
| } |
| |
| var offscreencanvas = new OffscreenCanvas(10, 10); |
| var gl = wtu.create3DContext(offscreencanvas); |
| |
| debug(""); |
| debug("check that an attempt to upload an image from another origin throws an exception."); |
| var tex = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex); |
| gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 256, 256, 0, gl.RGBA, gl.UNSIGNED_BYTE, null); |
| assertMsg(causedException(makeTexImage2D(gl, img)), |
| "texImage2D with cross-origin image should throw exception."); |
| assertMsg(causedException(makeTexSubImage2D(gl, img)), |
| "texSubImage2D with cross-origin image should throw exception."); |
| |
| debug("check that readPixels continues to work against this offscreencanvas."); |
| assertMsg(!causedException(makeReadPixels(gl)), |
| "readPixels should never throw exception -- not possible to dirty origin of WebGL canvas."); |
| |
| debug("check that an attempt to upload a tainted canvas throws an exception."); |
| var canvas = document.getElementById("canvas"); |
| var ctx2d = canvas.getContext("2d"); |
| ctx2d.drawImage(img, 0, 0); |
| assertMsg(causedException(makeTexImage2D(gl, canvas)), |
| "texImage2D with NON origin clean canvas should throw exception."); |
| assertMsg(causedException(makeTexSubImage2D(gl, canvas)), |
| "texSubImage2D with NON origin clean canvas should throw exception."); |
| |
| debug("check that readPixels continues to work against this offscreencanvas."); |
| assertMsg(!causedException(makeReadPixels(gl)), |
| "readPixels should never throw exception -- not possible to dirty origin of WebGL canvas."); |
| |
| // TODO: Should check video. |
| // TODO: Should check CORS support. |
| |
| finishTest(); |
| } |
| |
| (async function() { |
| const img = document.getElementById('img'); |
| try { |
| await wtu.awaitOrTimeout(wtu.loadCrossOriginImage(img, defaultImgUrl, localImgUrl)); |
| } catch (e) { |
| testFailed(`Image setup failed (${e}).`); |
| finishTest(); |
| return; |
| } |
| imageLoaded(img); |
| })(); |
| </script> |
| </body> |
| </html> |
