Introduction to 3D Game Programming with DirectX 9.0c—A Shader A...

//============================================================================= // d3dApp.h by Frank Luna (C) 2005 All Rights Reserved. //============================================================================= #include "d3dApp.h" D3DApp* gd3dApp = 0; IDirect3DDevice9* gd3dDevice = 0; LRESULT CALLBACK MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) { // Don't start processing messages until the application has been created. if( gd3dApp != 0 ) return gd3dApp->msgProc(msg, wParam, lParam); else return DefWindowProc(hwnd, msg, wParam, lParam); } D3DApp::D3DApp(HINSTANCE hInstance, std::string winCaption, D3DDEVTYPE devType, DWORD requestedVP) { mMainWndCaption = winCaption; mDevType = devType; mRequestedVP = requestedVP; mhAppInst = hInstance; mhMainWnd = 0; md3dObject = 0; mAppPaused = false; ZeroMemory(&md3dPP, sizeof(md3dPP)); initMainWindow(); initDirect3D(); } D3DApp::~D3DApp() { ReleaseCOM(md3dObject); ReleaseCOM(gd3dDevice); } HINSTANCE D3DApp::getAppInst() { return mhAppInst; } HWND D3DApp::getMainWnd() { return mhMainWnd; } void D3DApp::initMainWindow() { WNDCLASS wc; wc.style = CS_HREDRAW | CS_VREDRAW; wc.lpfnWndProc = MainWndProc; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hInstance = mhAppInst; wc.hIcon = LoadIcon(0, IDI_APPLICATION); wc.hCursor = LoadCursor(0, IDC_ARROW); wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wc.lpszMenuName = 0; wc.lpszClassName = "D3DWndClassName"; if( !RegisterClass(&wc) ) { MessageBox(0, "RegisterClass FAILED", 0, 0); PostQuitMessage(0); } // Default to a window with a client area rectangle of 800x600. RECT R = {0, 0, 800, 600}; AdjustWindowRect(&R, WS_OVERLAPPEDWINDOW, false); mhMainWnd = CreateWindow("D3DWndClassName", mMainWndCaption.c_str(), WS_OVERLAPPEDWINDOW, 100, 100, R.right, R.bottom, 0, 0, mhAppInst, 0); if( !mhMainWnd ) { MessageBox(0, "CreateWindow FAILED", 0, 0); PostQuitMessage(0); } ShowWindow(mhMainWnd, SW_SHOW); UpdateWindow(mhMainWnd); } void D3DApp::initDirect3D() { // Step 1: Create the IDirect3D9 object. md3dObject = Direct3DCreate9(D3D_SDK_VERSION); if( !md3dObject ) { MessageBox(0, "Direct3DCreate9 FAILED", 0, 0); PostQuitMessage(0); } // Step 2: Verify hardware support for specified formats in windowed and full screen modes. D3DDISPLAYMODE mode; md3dObject->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &mode); HR(md3dObject->CheckDeviceType(D3DADAPTER_DEFAULT, mDevType, mode.Format, mode.Format, true)); HR(md3dObject->CheckDeviceType(D3DADAPTER_DEFAULT, mDevType, D3DFMT_X8R8G8B8, D3DFMT_X8R8G8B8, false)); // Step 3: Check for requested vertex processing and pure device. D3DCAPS9 caps; HR(md3dObject->GetDeviceCaps(D3DADAPTER_DEFAULT, mDevType, &caps)); DWORD devBehaviorFlags = 0; if( caps.DevCaps & D3DDEVCAPS_HWTRANSFORMANDLIGHT ) devBehaviorFlags |= mRequestedVP; else devBehaviorFlags |= D3DCREATE_SOFTWARE_VERTEXPROCESSING; // If pure device and HW T&L supported if( caps.DevCaps & D3DDEVCAPS_PUREDEVICE && devBehaviorFlags & D3DCREATE_HARDWARE_VERTEXPROCESSING) devBehaviorFlags |= D3DCREATE_PUREDEVICE; // Step 4: Fill out the D3DPRESENT_PARAMETERS structure. md3dPP.BackBufferWidth = 0; md3dPP.BackBufferHeight = 0; md3dPP.BackBufferFormat = D3DFMT_UNKNOWN; md3dPP.BackBufferCount = 1; md3dPP.MultiSampleType = D3DMULTISAMPLE_NONE; md3dPP.MultiSampleQuality = 0; md3dPP.SwapEffect = D3DSWAPEFFECT_DISCARD; md3dPP.hDeviceWindow = mhMainWnd; md3dPP.Windowed = true; md3dPP.EnableAutoDepthStencil = true; md3dPP.AutoDepthStencilFormat = D3DFMT_D24S8; md3dPP.Flags = 0; md3dPP.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT; md3dPP.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE; // Step 5: Create the device. HR(md3dObject->CreateDevice( D3DADAPTER_DEFAULT, // primary adapter mDevType, // device type mhMainWnd, // window associated with device devBehaviorFlags, // vertex processing &md3dPP, // present parameters &gd3dDevice)); // return created device } int D3DApp::run() { MSG msg; msg.message = WM_NULL; __int64 cntsPerSec = 0; QueryPerformanceFrequency((LARGE_INTEGER*)&cntsPerSec); float secsPerCnt = 1.0f / (float)cntsPerSec; __int64 prevTimeStamp = 0; QueryPerformanceCounter((LARGE_INTEGER*)&prevTimeStamp); while(msg.message != WM_QUIT) { // If there are Window messages then process them. if(PeekMessage( &msg, 0, 0, 0, PM_REMOVE )) { TranslateMessage( &msg ); DispatchMessage( &msg ); } // Otherwise, do animation/game stuff. else { // If the application is paused then free some CPU cycles to other // applications and then continue on to the next frame. if( mAppPaused ) { Sleep(20); continue; } if( !isDeviceLost() ) { __int64 currTimeStamp = 0; QueryPerformanceCounter((LARGE_INTEGER*)&currTimeStamp); float dt = (currTimeStamp - prevTimeStamp)*secsPerCnt; updateScene(dt); drawScene(); // Prepare for next iteration: The current time stamp becomes // the previous time stamp for the next iteration. prevTimeStamp = currTimeStamp; } } } return (int)msg.wParam; } LRESULT D3DApp::msgProc(UINT msg, WPARAM wParam, LPARAM lParam) { // Is the application in a minimized or maximized state? static bool minOrMaxed = false; RECT clientRect = {0, 0, 0, 0}; switch( msg ) { // WM_ACTIVE is sent when the window is activated or deactivated. // We pause the game when the main window is deactivated and // unpause it when it becomes active. case WM_ACTIVATE: if( LOWORD(wParam) == WA_INACTIVE ) mAppPaused = true; else mAppPaused = false; return 0; // WM_SIZE is sent when the user resizes the window. case WM_SIZE: if( gd3dDevice ) { md3dPP.BackBufferWidth = LOWORD(lParam); md3dPP.BackBufferHeight = HIWORD(lParam); if( wParam == SIZE_MINIMIZED ) { mAppPaused = true; minOrMaxed = true; } else if( wParam == SIZE_MAXIMIZED ) { mAppPaused = false; minOrMaxed = true; onLostDevice(); HR(gd3dDevice->Reset(&md3dPP)); onResetDevice(); } // Restored is any resize that is not a minimize or maximize. // For example, restoring the window to its default size // after a minimize or maximize, or from dragging the resize // bars. else if( wParam == SIZE_RESTORED ) { mAppPaused = false; // Are we restoring from a mimimized or maximized state, // and are in windowed mode? Do not execute this code if // we are restoring to full screen mode. if( minOrMaxed && md3dPP.Windowed ) { onLostDevice(); HR(gd3dDevice->Reset(&md3dPP)); onResetDevice(); } else { // No, which implies the user is resizing by dragging // the resize bars. However, we do not reset the device // here because as the user continuously drags the resize // bars, a stream of WM_SIZE messages is sent to the window, // and it would be pointless (and slow) to reset for each // WM_SIZE message received from dragging the resize bars. // So instead, we reset after the user is done resizing the // window and releases the resize bars, which sends a // WM_EXITSIZEMOVE message. } minOrMaxed = false; } } return 0; // WM_EXITSIZEMOVE is sent when the user releases the resize bars. // Here we reset everything based on the new wind