test_webgl_constant_vendor_rfp.html

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<!DOCTYPE html>

<meta charset="utf-8">

<title>WebGL Constant Vendor with RFP - WebGLRenderInfo takes precedence</title>

<script src="/tests/SimpleTest/SimpleTest.js"></script>

<script>

/* global SimpleTest SpecialPowers */

SimpleTest.waitForExplicitFinish();

document.addEventListener("DOMContentLoaded", async function() {

  // Enable RFP - WebGLRenderInfo should take precedence over WebGLVendorConstant

  await SpecialPowers.pushPrefEnv({

    set: [

	["privacy.resistFingerprinting", true],

	["privacy.fingerprintingProtection", true],

	["privacy.fingerprintingProtection.overrides", "+WebGLVendorConstant"],

});

  let canvas = document.body.appendChild(document.createElement("canvas"));

  if (!canvas) {

    SimpleTest.ok(false, "Cannot create canvas");

    SimpleTest.finish();

    return;

  let gl = canvas.getContext("webgl");

  if (!gl) {

    SimpleTest.ok(false, "Cannot get WebGL context");

    SimpleTest.finish();

    return;

  // Try to get the WEBGL_debug_renderer_info extension

  let ext = gl.getExtension("WEBGL_debug_renderer_info");

  if (!ext) {

    SimpleTest.ok(false, "WEBGL_debug_renderer_info extension should be available with RFP");

    SimpleTest.finish();

    return;

  // With RFP enabled, WebGLRenderInfo takes precedence over WebGLVendorConstant

  // The vendor should be "Mozilla"

  let vendor = gl.getParameter(ext.UNMASKED_VENDOR_WEBGL);

  SimpleTest.is(vendor, "Mozilla", "UNMASKED_VENDOR_WEBGL should be 'Mozilla' with RFP enabled (WebGLRenderInfo precedence)");

  // Also check renderer for completeness

  let renderer = gl.getParameter(ext.UNMASKED_RENDERER_WEBGL);

  SimpleTest.is(renderer, "Mozilla", "UNMASKED_RENDERER_WEBGL should be 'Mozilla' with RFP enabled");

  SimpleTest.finish();

});

</script>