1 files changed, 35 insertions, 0 deletions
diff --git a/dom/canvas/WebGLExtensionDisjointTimerQuery.cpp b/dom/canvas/WebGLExtensionDisjointTimerQuery.cpp
new file mode 100644
index 0000000000..666ca4f6d6
--- /dev/null
+++ b/dom/canvas/WebGLExtensionDisjointTimerQuery.cpp
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WebGLExtensions.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGLRenderingContextBinding.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/StaticPrefs_webgl.h"
+#include "WebGLContext.h"
+#include "WebGLQuery.h"
+
+namespace mozilla {
+
+WebGLExtensionDisjointTimerQuery::WebGLExtensionDisjointTimerQuery(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+}
+
+bool WebGLExtensionDisjointTimerQuery::IsSupported(
+    const WebGLContext* const webgl) {
+  if (!StaticPrefs::webgl_enable_privileged_extensions()) return false;
+
+  gl::GLContext* gl = webgl->GL();
+  return gl->IsSupported(gl::GLFeature::query_objects) &&
+         gl->IsSupported(gl::GLFeature::get_query_object_i64v) &&
+         gl->IsSupported(
+             gl::GLFeature::query_counter);  // provides GL_TIMESTAMP
+}
+
+}  // namespace mozilla