Display GL window system binding information in about:gpu

ui/gl/gl_implementation_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <vector>
 
 #include "base/at_exit.h"
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 256 matching lines @@
 
 void ClearGLBindings() {
   ClearGLBindingsEGL();
   ClearGLBindingsGL();
   ClearGLBindingsOSMESA();
   ClearGLBindingsWGL();
   SetGLImplementation(kGLImplementationNone);
   UnloadGLNativeLibraries();
 }
 
+bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
+  *info = GLWindowSystemBindingInfo();
+  switch (GetGLImplementation()) {
+    case kGLImplementationDesktopGL: {
+      if (!wglGetExtensionsStringEXT)
+        return false;
+      const char* extensions = wglGetExtensionsStringEXT();
+      if (extensions)
+        info->extensions = extensions;
+      return true;
+    }
+    case kGLImplementationEGLGLES2: {
+      EGLDisplay display = eglGetCurrentDisplay();
+      const char* vendor = eglQueryString(display, EGL_VENDOR);
+      const char* version = eglQueryString(display, EGL_VERSION);
+      const char* extensions = eglQueryString(display, EGL_EXTENSIONS);
+      if (vendor)
+        info->vendor = vendor;
+      if (version)
+        info->version = version;
+      if (extensions)
+        info->extensions = extensions;
+      return true;
+    }
+    default:
+      return false;
+  }
+  return false;
+}
+
 }  // namespace gfx