D3D11教程一代码

#include"SystemClass.h" //全局变量 static SystemClass* D3DAPP = NULL; //接受SystemClass类对象的全局回调函数 LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { case WM_DESTROY: { PostQuitMessage(0); //发送WM_QUIT消息到消息队列 接收到WM_QUIT跳出消息循环 return 0; } case WM_CLOSE: { PostQuitMessage(0); return 0; } //将其它消息传送到D3DAPP的MessageHandler函数 default: return D3DAPP->MessageHandler(hwnd, message, wParam, lParam); } } SystemClass::SystemClass() { m_Graphics = NULL; m_Input = NULL; } SystemClass::SystemClass(const SystemClass& sys) { } /*不在析构函数中回收内存的一点原因是谨慎对待内存的回收问题*/ SystemClass::~SystemClass() { } /*系统类初始化函数*/ bool SystemClass::Initialize() { int ScreenWidth, ScreenHeight; bool result; /*初始化屏幕宽度和高度*/ ScreenWidth = 0; ScreenHeight = 0; /*初始化系统类的窗口*/ InitializeWindow(ScreenWidth, ScreenHeight); /*创建输入类对象*/ m_Input = new InputClass(); if (!m_Input) { return false; } /*初始化输入对象*/ m_Input->Initialize(); /*创建图形类对象*/ m_Graphics = new GraphicsClass(); if (!m_Graphics) { return false; } /*初始化图形对象,发生在窗口初始化之后,因为窗口初始化之后,窗口句柄才被建立*/ result=m_Graphics->Initialize(ScreenWidth, ScreenHeight, mHwnd); if (!result) { return false; } return true; } void SystemClass::Shutdown() { /*释放图形类对象*/ if (m_Graphics) { m_Graphics->Shutdown(); delete m_Graphics; m_Graphics = NULL; } /*释放输入类对象*/ if (m_Input) { delete m_Input; m_Input = NULL; } /*关闭窗口*/ this->ShutdownWindow(); } void SystemClass::Run() { MSG msg = { 0 }; bool done, result; /*循环直到收到来自窗口的或者使用者的quit消息*/ done = false; while (!done) { //操作窗口消息 if (PeekMessage(&msg, 0, 0, 0, PM_REMOVE)) { if (msg.message == WM_QUIT) { done = true; } TranslateMessage(&msg); DispatchMessage(&msg); //把消息发送到WindProc()中 } else { result = Frame(); //Frame运行的函数可能造成游戏退出 if (!result) { done = true; } } } } bool SystemClass::Frame() { bool result; //你按下了退出函数,则退出这个应用(按键的宏刚好相对应) if (m_Input->IsKeyDown(VK_ESCAPE)) { return false; } //进行图形对象的帧函数 result = m_Graphics->Frame(); if (!result) { return false; } return true; } LRESULT CALLBACK SystemClass::MessageHandler(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { switch (message) { //确认一个键已经在键盘上按下 case WM_KEYDOWN: { //如果一个键被按下,则将这个键的信息送到input object,为了可以记录这个状态 m_Input->KeyDown((unsigned int)wParam); return 0; } //确认一个键被释放 case WM_KEYUP: { //如果一个键被释放,则将这个键的信息送到input object,为了可以取消这个状态 m_Input->KeyUp((unsigned int)wParam); return 0; } //其它的消息被送到默认处理消息函数 default: { return DefWindowProc(hwnd, message, wParam, lParam); //为全局静态函数 } } } void SystemClass::InitializeWindow(int& ScrrenWidth, int &ScrrenHeight) { WNDCLASSEX wc; DEVMODE dmScrrenSettings; int posX, posY; //获取一个额外的指向这个对象的指针 D3DAPP = this; //获取应用实例句柄 mHinstance = GetModuleHandle(NULL); //给予应用一个名字 mApplicationName = L"Engine"; //设定要创建的类的属性 wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; wc.lpfnWndProc = WndProc; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hInstance = mHinstance; wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); wc.hIconSm = wc.hIcon; wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); wc.lpszMenuName = NULL; wc.lpszClassName = mApplicationName; wc.cbSize = sizeof(WNDCLASSEX); //注册这个类 RegisterClassEx(&wc); //获取屏幕分辨率的宽度和高度 ScrrenWidth = GetSystemMetrics(SM_CXSCREEN); ScrrenHeight= GetSystemMetrics(SM_CYSCREEN); //取决于是否为全屏幕 if (FULL_SCREEN) { //如果为全屏幕,则设定屏幕为用户桌面的最大化并且为32bit memset(&dmScrrenSettings, 0, sizeof(dmScrrenSettings)); dmScrrenSettings.dmSize = sizeof(dmScrrenSettings); dmScrrenSettings.dmPelsWidth = (unsigned long)ScrrenWidth; dmScrrenSettings.dmPelsHeight = (unsigned long)ScrrenHeight; dmScrrenSettings.dmBitsPerPel = 32; dmScrrenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT; //改变显示设定,设置为全屏幕 ChangeDisplaySettings(&dmScrrenSettings, CDS_FULLSCREEN); //设定窗口左上角的位置 posX = posY = 0; } else { //如果窗口化,设定为800*600分辨率 ScrrenWidth = 800; ScrrenHeight = 600; //窗口位于屏幕稍微的左上方 posX = (GetSystemMetrics(SM_CXSCREEN) - ScrrenWidth) / 2-200; posY = (GetSystemMetrics(SM_CYSCREEN) - ScrrenHeight) / 2-100; } //创建窗口,并且获取窗口的句柄 mHwnd = CreateWindowEx(WS_EX_APPWINDOW, mApplicationName, mApplicationName, WS_OVERLAPPEDWINDOW, posX, posY, ScrrenWidth, ScrrenHeight, NULL, NULL, mHinstance, NULL); //将窗口显示于屏幕之上,并设定该窗口为主要集中点 ShowWindow(mHwnd, SW_SHOW); SetForegroundWindow(mHwnd); SetFocus(mHwnd); //隐藏鼠标光标 //ShowCursor(false); } void SystemClass::ShutdownWindow() { //显示鼠标光标 //ShowCursor(true); //如果离开全屏幕模式,恢复显示设定 if (FULL_SCREEN) { ChangeDisplaySettings(NULL, 0); } //移除(破坏)窗口 DestroyWindow(mHwnd); mHwnd = NULL; //移除程序实例 UnregisterClass(mApplicationName, mHinstance); mHinstance = NULL; //置空应用类对象 D3DAPP = NULL; }