1 files changed, 69 insertions, 0 deletions
diff --git a/dom/canvas/WebGLQuery.h b/dom/canvas/WebGLQuery.h
new file mode 100644
index 000000000..132e70ae9
--- /dev/null
+++ b/dom/canvas/WebGLQuery.h
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+#ifndef WEBGL_QUERY_H_
+#define WEBGL_QUERY_H_
+
+#include "mozilla/LinkedList.h"
+#include "nsWrapperCache.h"
+
+#include "WebGLObjectModel.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+
+class WebGLQuery final
+    : public nsWrapperCache
+    , public WebGLRefCountedObject<WebGLQuery>
+    , public LinkedListElement<WebGLQuery>
+{
+    friend class AvailableRunnable;
+    friend class WebGLRefCountedObject<WebGLQuery>;
+
+public:
+    const GLuint mGLName;
+private:
+    GLenum mTarget;
+    WebGLRefPtr<WebGLQuery>* mActiveSlot;
+
+    bool mCanBeAvailable; // Track whether the event loop has spun
+
+    ////
+public:
+    GLenum Target() const { return mTarget; }
+    bool IsActive() const { return bool(mActiveSlot); }
+
+    ////
+
+    NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(WebGLQuery)
+    NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(WebGLQuery)
+
+    explicit WebGLQuery(WebGLContext* webgl);
+
+private:
+    ~WebGLQuery() {
+        DeleteOnce();
+    };
+
+    // WebGLRefCountedObject
+    void Delete();
+
+public:
+    WebGLContext* GetParentObject() const { return mContext; }
+    virtual JSObject* WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto) override;
+
+    ////
+
+    void BeginQuery(GLenum target, WebGLRefPtr<WebGLQuery>& slot);
+    void DeleteQuery();
+    void EndQuery();
+    void GetQueryParameter(GLenum pname, JS::MutableHandleValue retval) const;
+    bool IsQuery() const;
+    void QueryCounter(const char* funcName, GLenum target);
+};
+
+} // namespace mozilla
+
+#endif // WEBGL_QUERY_H_