1 files changed, 169 insertions, 0 deletions
diff --git a/dom/canvas/test/webgl-mochitest/driver-info.js b/dom/canvas/test/webgl-mochitest/driver-info.js
new file mode 100644
index 000000000..e2f6e003a
--- /dev/null
+++ b/dom/canvas/test/webgl-mochitest/driver-info.js
@@ -0,0 +1,169 @@
+DriverInfo = (function() {
+  // ---------------------------------------------------------------------------
+  // Debug info handling
+
+  function defaultInfoFunc(str) {
+    console.log('Info: ' + str);
+  }
+
+  var gInfoFunc = defaultInfoFunc;
+  function setInfoFunc(func) {
+    gInfoFunc = func;
+  }
+
+  function info(str) {
+    gInfoFunc(str);
+  }
+
+  // ---------------------------------------------------------------------------
+  // OS and driver identification
+  //   Stolen from dom/canvas/test/webgl/test_webgl_conformance_test_suite.html
+  function detectDriverInfo() {
+    try {
+      var cc = SpecialPowers.Cc;
+    } catch (e) {
+      throw 'No SpecialPowers!';
+    }
+
+    const Cc = SpecialPowers.Cc;
+    const Ci = SpecialPowers.Ci;
+    var doc = Cc["@mozilla.org/xmlextras/domparser;1"].createInstance(Ci.nsIDOMParser).parseFromString("<html/>", "text/html");
+
+    var canvas = doc.createElement("canvas");
+    canvas.width = 1;
+    canvas.height = 1;
+
+    var type = "";
+    var gl = null;
+    try {
+      gl = canvas.getContext("experimental-webgl");
+    } catch(e) {}
+
+    if (!gl) {
+      info('Failed to create WebGL context for querying driver info.');
+      throw 'WebGL failed';
+    }
+
+    var ext = gl.getExtension("WEBGL_debug_renderer_info");
+    // this extension is unconditionally available to chrome. No need to check.
+
+    var webglRenderer = gl.getParameter(ext.UNMASKED_RENDERER_WEBGL);
+    var webglVendor = gl.getParameter(ext.UNMASKED_VENDOR_WEBGL);
+    return [webglVendor, webglRenderer];
+  }
+
+  function detectOSInfo() {
+    try {
+      var cc = SpecialPowers.Cc;
+    } catch (e) {
+      throw 'No SpecialPowers!';
+    }
+
+    const Cc = SpecialPowers.Cc;
+    const Ci = SpecialPowers.Ci;
+
+    // From reftest.js:
+    var runtime = Cc['@mozilla.org/xre/app-info;1'].getService(Ci.nsIXULRuntime);
+
+    var os = null;
+    var version = null;
+    if (navigator.platform.indexOf('Win') == 0) {
+      os = OS.WINDOWS;
+
+      // code borrowed from browser/modules/test/browser_taskbar_preview.js
+      version = SpecialPowers.Services.sysinfo.getProperty('version');
+      version = parseFloat(version);
+      // Version 6.0 is Vista, 6.1 is 7.
+
+    } else if (navigator.platform.indexOf('Mac') == 0) {
+      os = OS.MAC;
+
+      var versionMatch = /Mac OS X (\d+.\d+)/.exec(navigator.userAgent);
+      version = versionMatch ? parseFloat(versionMatch[1]) : null;
+
+    } else if (runtime.widgetToolkit == 'gonk') {
+      os = OS.B2G;
+
+    } else if (navigator.appVersion.indexOf('Android') != -1) {
+      os = OS.ANDROID;
+      // From layout/tools/reftest/reftest.js:
+      version = SpecialPowers.Services.sysinfo.getProperty('version');
+
+    } else if (navigator.platform.indexOf('Linux') == 0) {
+      // Must be checked after android, as android also has a 'Linux' platform string.
+      os = OS.LINUX;
+    }
+
+    return [os, version];
+  }
+
+  var OS = {
+    WINDOWS: 'windows',
+    MAC: 'mac',
+    LINUX: 'linux',
+    ANDROID: 'android',
+    B2G: 'b2g',
+  };
+
+  var DRIVER = {
+    MESA: 'mesa',
+    NVIDIA: 'nvidia',
+    ANDROID_X86_EMULATOR: 'android x86 emulator',
+    ANGLE: 'angle',
+  };
+
+  var kOS = null;
+  var kOSVersion = null;
+  var kDriver = null;
+
+  try {
+    [kOS, kOSVersion] = detectOSInfo();
+  } catch (e) {
+    // Generally just fails when we don't have SpecialPowers.
+  }
+
+  try {
+    var glVendor, glRenderer;
+    [glVendor, glRenderer] = detectDriverInfo();
+    info('GL vendor: ' + glVendor);
+    info('GL renderer: ' + glRenderer);
+
+    if (glRenderer.includes('llvmpipe')) {
+      kDriver = DRIVER.MESA;
+    } else if (glRenderer.includes('Android Emulator')) {
+      kDriver = DRIVER.ANDROID_X86_EMULATOR;
+    } else if (glRenderer.includes('ANGLE')) {
+      kDriver = DRIVER.ANGLE;
+    } else if (glVendor.includes('NVIDIA')) {
+      kDriver = DRIVER.NVIDIA;
+    }
+  } catch (e) {
+    // detectDriverInfo is fallible where WebGL fails.
+  }
+
+  if (kOS) {
+    info('OS detected as: ' + kOS);
+    info('  Version: ' + kOSVersion);
+  } else {
+    info('OS not detected.');
+    info('  `platform`:   ' + navigator.platform);
+    info('  `appVersion`: ' + navigator.appVersion);
+    info('  `userAgent`:  ' + navigator.userAgent);
+  }
+  if (kDriver) {
+    info('GL driver detected as: ' + kDriver);
+  } else {
+    info('GL driver not detected.');
+  }
+
+  return {
+    setInfoFunc: setInfoFunc,
+
+    OS: OS,
+    DRIVER: DRIVER,
+    getOS: function() { return kOS; },
+    getDriver: function() { return kDriver; },
+    getOSVersion: function() { return kOSVersion; },
+  };
+})();
+