////  Created by Bradley Austin Davis on 2016/05/15//  Copyright 2013-2016 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html//#ifndef hifi_gpu_gl_GLQuery_h#define hifi_gpu_gl_GLQuery_h #include "GLShared.h"#include "GLBackend.h" namespace gpu { namespace gl { class GLQuery : public GLObject<Query> {    using Parent = gpu::gl::GLObject<Query>;public:    template <typename GLQueryType>    static GLQueryType* sync(GLBackend& backend, const Query& query) {        GLQueryType* object = Backend::getGPUObject<GLQueryType>(query);         // need to have a gpu object?        if (!object) {            // All is green, assign the gpuobject to the Query            object = new GLQueryType(backend.shared_from_this(), query);            (void)CHECK_GL_ERROR();            Backend::setGPUObject(query, object);        }         return object;    }     template <typename GLQueryType>    static GLuint getId(GLBackend& backend, const QueryPointer& query) {        if (!query) {            return 0;        }         GLQuery* object = sync<GLQueryType>(backend, *query);        if (!object) {            return 0;        }          return object->_endqo;    }     const GLuint& _endqo = { _id };    const GLuint _beginqo = { 0 };    GLuint64 _result { (GLuint64)0 };     /// Batch time in nanoseconds.    GLuint64 _batchElapsedTime{ (GLuint64)0 };    std::chrono::high_resolution_clock::time_point _batchElapsedTimeBegin;    uint64_t _profileRangeId { 0 };    uint32_t _rangeQueryDepth { 0 }; protected:    GLQuery(const std::weak_ptr<GLBackend>& backend, const Query& query, GLuint endId, GLuint beginId) : Parent(backend, query, endId), _beginqo(beginId) {}    ~GLQuery() {        if (_id) {            GLuint ids[2] = { _endqo, _beginqo };            glDeleteQueries(2, ids);        }    }}; } } #endif