The Tor Browser: content/canvas/test/chrome/nonchrome_webgl_debug_renderer

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 <!DOCTYPE HTML>

     2 <html>

     3 <script>

     5 // This file has the portion of the test_webgl_renderer_info chrome mochitest

     6 // that has to run as non-chrome to check that this WebGL extension is not exposed to content

     8 // we can't call the chrome Mochitest ok() function ourselves from non-chrome code.

     9 // So we remote it to the chrome test.

    11 function ok(res, msg) {

    12   // Note we post to ourselves as posting to the chrome code doesn't seem to work here.

    13   // This works by having the chrome code put an event handler on our own window.

    14   window.postMessage({ subTestFinished: true, result: res, message: msg }, "*");

    15 }

    17 function messageListener(e) {

    18   // This is how the chrome test tells us to start running -- we have to wait for this

    19   // message to avoid running before it's set up its event handler.

    20   if (e.data == "run") {

    21     run();

    22   }

    23 }

    25 window.addEventListener("message", messageListener, true);

    27 function run() {

    28   const UNMASKED_VENDOR_WEBGL = 0x9245;

    29   const UNMASKED_RENDERER_WEBGL = 0x9246;

    31   var canvas = document.createElement("canvas");

    32   var gl = canvas.getContext("experimental-webgl");

    34   ok(!gl.getError(), "getError on newly created WebGL context should return NO_ERROR");

    36   ok(!gl.getParameter(UNMASKED_VENDOR_WEBGL) && gl.getError() == gl.INVALID_ENUM,

    37       "Should not be able to query UNMASKED_VENDOR_WEBGL without having enabled the WEBGL_debug_renderer_info extension");

    38   ok(!gl.getParameter(UNMASKED_RENDERER_WEBGL) && gl.getError() == gl.INVALID_ENUM,

    39       "Should not be able to query UNMASKED_RENDERER_WEBGL without having enabled the WEBGL_debug_renderer_info extension");

    41   var exts = gl.getSupportedExtensions();

    42   ok(exts.indexOf("WEBGL_debug_renderer_info") == -1,

    43       "WEBGL_debug_renderer_info should not be listed by getSupportedExtensions in non-chrome contexts");

    44   var debugRendererInfoExtension = gl.getExtension("WEBGL_debug_renderer_info");

    45   ok(!debugRendererInfoExtension,

    46       "WEBGL_debug_renderer_info should not be available through getExtension in non-chrome contexts");

    48   ok(!gl.getParameter(UNMASKED_VENDOR_WEBGL) && gl.getError() == gl.INVALID_ENUM,

    49       "Should not be able to query UNMASKED_VENDOR_WEBGL if enabling WEBGL_debug_renderer_info failed");

    50   ok(!gl.getParameter(UNMASKED_RENDERER_WEBGL) && gl.getError() == gl.INVALID_ENUM,

    51       "Should not be able to query UNMASKED_RENDERER_WEBGL if enabling WEBGL_debug_renderer_info failed");

    53   window.postMessage({allTestsFinished: true}, "*");

    54 }

    56 </script>

    57 </html>

The Tor Browser / file revision