////  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//#include "GLShader.h"#include <gl/GLShaders.h> #include "GLBackend.h" using namespace gpu;using namespace gpu::gl; GLShader::GLShader(const std::weak_ptr<GLBackend>& backend) : _backend(backend) {} GLShader::~GLShader() {    for (auto& so : _shaderObjects) {        auto backend = _backend.lock();        if (backend) {            if (so.glshader != 0) {                backend->releaseShader(so.glshader);            }            if (so.glprogram != 0) {                backend->releaseProgram(so.glprogram);            }        }    }} GLShader* GLShader::sync(GLBackend& backend, const Shader& shader, const Shader::CompilationHandler& handler) {    GLShader* object = Backend::getGPUObject<GLShader>(shader);     // If GPU object already created then good    if (object) {        return object;    }    PROFILE_RANGE(render, "/GLShader::sync");    // need to have a gpu object?    if (shader.isProgram()) {        GLShader* tempObject = backend.compileBackendProgram(shader, handler);        if (tempObject) {            object = tempObject;            Backend::setGPUObject(shader, object);        }    } else if (shader.isDomain()) {        GLShader* tempObject = backend.compileBackendShader(shader, handler);        if (tempObject) {            object = tempObject;            Backend::setGPUObject(shader, object);        }    }     glFinish();    return object;}