dx9 alhpa混合结构缓冲

//----------------------------------------------------------------------------- // Name: dx9_alpha_blending_framebuffer.cpp // Author: Kevin Harris // Last Modified: 03/25/05 // Description: This sample demonstrates how to perform alpha-blending in // the frame-buffer. The sample renders a textured cube which // is alpha-blended into the frame-buffer in such a way as to // create a translucent effect. // // Control Keys: b - Toggle blending //----------------------------------------------------------------------------- #define STRICT #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <mmsystem.h> #include <d3d9.h> #include <d3dx9.h> #include "resource.h" //----------------------------------------------------------------------------- // GLOBALS //----------------------------------------------------------------------------- HWND g_hWnd = NULL; LPDIRECT3D9 g_pD3D = NULL; LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; LPDIRECT3DVERTEXBUFFER9 g_pVertexBuffer = NULL; LPDIRECT3DTEXTURE9 g_pTexture = NULL; bool g_bBlending = true; float g_fElpasedTime; double g_dCurrentTime; double g_dLastTime; #define D3DFVF_CUSTOMVERTEX ( D3DFVF_XYZ | D3DFVF_TEX1 ) struct Vertex { float x, y, z; float tu, tv; }; Vertex g_cubeVertices[] = { {-1.0f, 1.0f,-1.0f, 0.0f,0.0f }, { 1.0f, 1.0f,-1.0f, 1.0f,0.0f }, {-1.0f,-1.0f,-1.0f, 0.0f,1.0f }, { 1.0f,-1.0f,-1.0f, 1.0f,1.0f }, {-1.0f, 1.0f, 1.0f, 1.0f,0.0f }, {-1.0f,-1.0f, 1.0f, 1.0f,1.0f }, { 1.0f, 1.0f, 1.0f, 0.0f,0.0f }, { 1.0f,-1.0f, 1.0f, 0.0f,1.0f }, {-1.0f, 1.0f, 1.0f, 0.0f,0.0f }, { 1.0f, 1.0f, 1.0f, 1.0f,0.0f }, {-1.0f, 1.0f,-1.0f, 0.0f,1.0f }, { 1.0f, 1.0f,-1.0f, 1.0f,1.0f }, {-1.0f,-1.0f, 1.0f, 0.0f,0.0f }, {-1.0f,-1.0f,-1.0f, 0.0f,1.0f }, { 1.0f,-1.0f, 1.0f, 1.0f,0.0f }, { 1.0f,-1.0f,-1.0f, 1.0f,1.0f }, { 1.0f, 1.0f,-1.0f, 0.0f,0.0f }, { 1.0f, 1.0f, 1.0f, 1.0f,0.0f }, { 1.0f,-1.0f,-1.0f, 0.0f,1.0f }, { 1.0f,-1.0f, 1.0f, 1.0f,1.0f }, {-1.0f, 1.0f,-1.0f, 1.0f,0.0f }, {-1.0f,-1.0f,-1.0f, 1.0f,1.0f }, {-1.0f, 1.0f, 1.0f, 0.0f,0.0f }, {-1.0f,-1.0f, 1.0f, 0.0f,1.0f } }; //----------------------------------------------------------------------------- // PROTOTYPES //----------------------------------------------------------------------------- int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow); LRESULT CALLBACK WindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam); void loadTexture(void); void init(void); void shutDown(void); void render(void); //----------------------------------------------------------------------------- // Name: WinMain() // Desc: The application's entry point //----------------------------------------------------------------------------- int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow ) { WNDCLASSEX winClass; MSG uMsg; memset(&uMsg,0,sizeof(uMsg)); winClass.lpszClassName = "MY_WINDOWS_CLASS"; winClass.cbSize = sizeof(WNDCLASSEX); winClass.style = CS_HREDRAW | CS_VREDRAW; winClass.lpfnWndProc = WindowProc; winClass.hInstance = hInstance; winClass.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_DIRECTX_ICON); winClass.hIconSm = LoadIcon(hInstance, (LPCTSTR)IDI_DIRECTX_ICON); winClass.hCursor = LoadCursor(NULL, IDC_ARROW); winClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); winClass.lpszMenuName = NULL; winClass.cbClsExtra = 0; winClass.cbWndExtra = 0; if( !RegisterClassEx(&winClass) ) return E_FAIL; g_hWnd = CreateWindowEx( NULL, "MY_WINDOWS_CLASS", "Direct3D (DX9) - Alpha Blending with the Frame Buffer", WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0, 0, 640, 480, NULL, NULL, hInstance, NULL ); if( g_hWnd == NULL ) return E_FAIL; ShowWindow( g_hWnd, nCmdShow ); UpdateWindow( g_hWnd ); init(); while( uMsg.message != WM_QUIT ) { if( PeekMessage( &uMsg, NULL, 0, 0, PM_REMOVE ) ) { TranslateMessage( &uMsg ); DispatchMessage( &uMsg ); } else { g_dCurrentTime = timeGetTime(); g_fElpasedTime = (float)((g_dCurrentTime - g_dLastTime) * 0.001); g_dLastTime = g_dCurrentTime; render(); } } shutDown(); UnregisterClass( "MY_WINDOWS_CLASS", winClass.hInstance ); return uMsg.wParam; } //----------------------------------------------------------------------------- // Name: WindowProc() // Desc: The window's message handler //----------------------------------------------------------------------------- LRESULT CALLBACK WindowProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) { switch( msg ) { case WM_CHAR: { switch( wParam ) { case 'b': case 'B': g_bBlending = !g_bBlending; break; } } break; case WM_KEYDOWN: { switch( wParam ) { case VK_ESCAPE: PostQuitMessage(0); break; } } break; case WM_CLOSE: { PostQuitMessage(0); } break; case WM_DESTROY: { PostQuitMessage(0); } break; default: { return DefWindowProc( hWnd, msg, wParam, lParam ); } break; } return 0; } //----------------------------------------------------------------------------- // Name: loadTexture() // Desc: //----------------------------------------------------------------------------- void loadTexture(void) { D3DXCreateTextureFromFile( g_pd3dDevice, "glass.bmp", &g_pTexture ); g_pd3dDevice->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR); g_pd3dDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR); } //----------------------------------------------------------------------------- // Name: init() // Desc: //----------------------------------------------------------------------------- void init( void ) { g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ); D3DDISPLAYMODE d3ddm; g_pD3D->GetAdapterDisplayMode( D3DADAPTER_DEFAULT, &d3ddm ); D3DPRESENT_PARAMETERS d3dpp; ZeroMemory( &d3dpp, sizeof(d3dpp) ); d3dpp.Windowed = TRUE; d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; d3dpp.BackBufferFormat = d3ddm.Format; d3dpp.EnableAutoDepthStencil = TRUE; d3dpp.AutoDepthStencilFormat = D3DFMT_D16; d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE; g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, g_hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pd3dDevice ); loadTexture(); g_pd3dDevice->CreateVertexBuffer( 24*sizeof(Vertex),0, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVertexBuffer, NULL ); void *pVertices = NULL; g_pVertexBuffer->Lock( 0, sizeof(g_cubeVertices), (void**)&pVertices, 0 ); memcpy( pVertices, g_cubeVertices, sizeof(g_cubeVertices) ); g_pVertexBuffer->Unlock(); g_pd3dDevice->SetRenderState(D3DRS_LIGHTING, FALSE); D3DXMATRIX matProj; D3DXMatrixPerspectiveFovLH( &matProj, D3DXToRadian( 45.0f ), 640.0f / 480.0f, 0.1f, 100.0f ); g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj ); } //----------------------------------------------------------------------------- // Name: shutDown() // Desc: //----------------------------------------------------------------------------- voi