WebGLQuery.h (1255B)
1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 #ifndef WEBGL_QUERY_H_ 7 #define WEBGL_QUERY_H_ 8 9 #include "WebGLObjectModel.h" 10 #include "nsThreadUtils.h" 11 12 namespace mozilla { 13 namespace webgl { 14 class AvailabilityRunnable; 15 } // namespace webgl 16 17 class WebGLQuery final : public WebGLContextBoundObject { 18 friend class webgl::AvailabilityRunnable; 19 20 MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(WebGLQuery, override) 21 22 public: 23 const GLuint mGLName; 24 25 private: 26 GLenum mTarget; 27 RefPtr<WebGLQuery>* mActiveSlot; 28 29 bool mCanBeAvailable = false; // Track whether the event loop has spun 30 31 //// 32 public: 33 GLenum Target() const { return mTarget; } 34 bool IsActive() const { return bool(mActiveSlot); } 35 36 //// 37 38 explicit WebGLQuery(WebGLContext* webgl); 39 40 private: 41 ~WebGLQuery() override; 42 43 public: 44 //// 45 46 void BeginQuery(GLenum target, RefPtr<WebGLQuery>& slot); 47 void EndQuery(); 48 Maybe<double> GetQueryParameter(GLenum pname) const; 49 void QueryCounter(); 50 }; 51 52 } // namespace mozilla 53 54 #endif // WEBGL_QUERY_H_