Windows D3D渲染到纹理
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D3D渲染到纹理
1 #include <d3dx9.h> 2 3 //----------------------------------------------------------------------------- 4 // Desc: 全局变量 5 //----------------------------------------------------------------------------- 6 LPDIRECT3D9 g_pD3D = NULL; //Direct3D对象 7 LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; //Direct3D设备对象 8 LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; //顶点缓冲区对象 9 LPDIRECT3DTEXTURE9 g_pTexture = NULL; //纹理对象 10 11 LPDIRECT3DTEXTURE9 g_pRender2Tex = NULL; 12 LPDIRECT3DSURFACE9 g_pRenderSur = NULL; 13 LPDIRECT3DSURFACE9 g_pBackupSur = NULL; 14 15 //----------------------------------------------------------------------------- 16 // Desc: 顶点结构 17 //----------------------------------------------------------------------------- 18 struct CUSTOMVERTEX 19 20 FLOAT x, y, z; //顶点位置 21 FLOAT u,v ; //顶点纹理坐标 22 ; 23 #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_TEX1) 24 25 26 //----------------------------------------------------------------------------- 27 // Desc: 设置变换矩阵 28 //----------------------------------------------------------------------------- 29 VOID SetupMatrices() 30 31 //创建并设置世界矩阵 32 D3DXMATRIXA16 matWorld; 33 D3DXMatrixIdentity( &matWorld ); 34 g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld ); 35 36 //创建并设置观察矩阵 37 D3DXVECTOR3 vEyePt( 0.0f, 0.0f, -10 ); 38 D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f ); 39 D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f ); 40 D3DXMATRIXA16 matView; 41 D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec ); 42 g_pd3dDevice->SetTransform( D3DTS_VIEW, &matView ); 43 44 //创建并设置投影矩阵 45 D3DXMATRIXA16 matProj; 46 D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 100.0f ); 47 g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj ); 48 49 50 51 //----------------------------------------------------------------------------- 52 // Desc: 初始化Direct3D 53 //----------------------------------------------------------------------------- 54 HRESULT InitD3D( HWND hWnd ) 55 56 //创建Direct3D对象, 该对象用于创建Direct3D设备对象 57 if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) ) 58 return E_FAIL; 59 60 //设置D3DPRESENT_PARAMETERS结构, 准备创建Direct3D设备对象 61 D3DPRESENT_PARAMETERS d3dpp; 62 ZeroMemory( &d3dpp, sizeof(d3dpp) ); 63 d3dpp.Windowed = TRUE; 64 d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; 65 d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8; 66 67 //创建Direct3D设备对象 68 if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, 69 D3DCREATE_SOFTWARE_VERTEXPROCESSING, 70 &d3dpp, &g_pd3dDevice ) ) ) 71 72 return E_FAIL; 73 74 75 //禁用照明效果 76 g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE ); 77 78 //设置变换矩阵 79 SetupMatrices(); 80 81 HRESULT hr = g_pd3dDevice->CreateTexture(256,256,1,D3DUSAGE_RENDERTARGET, 82 D3DFMT_X8R8G8B8, D3DPOOL_DEFAULT, &g_pRender2Tex, NULL); 83 if (FAILED(hr)) 84 85 return E_FAIL; 86 87 g_pRender2Tex->GetSurfaceLevel(0, &g_pRenderSur); 88 89 return S_OK; 90 91 92 93 //----------------------------------------------------------------------------- 94 // Desc: 创建场景图形 95 //----------------------------------------------------------------------------- 96 HRESULT InitGriphics() 97 98 //创建纹理对象 99 if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, L"texture.jpg", &g_pTexture ) ) ) 100 101 MessageBox(NULL, L"创建纹理失败", L"Texture.exe", MB_OK); 102 return E_FAIL; 103 104 105 //顶点数据 106 CUSTOMVERTEX g_Vertices[] = 107 108 -3, -3, 0.0f, 0.0f, 1.0f, 109 -3, 3, 0.0f, 0.0f, 0.0f, 110 3, -3, 0.0f, 1.0f, 1.0f, 111 3, 3, 0.0f, 1.0f, 0.0f 112 113 ; 114 115 //创建顶点缓冲区 116 if( FAILED( g_pd3dDevice->CreateVertexBuffer( 4*sizeof(CUSTOMVERTEX), 117 0, D3DFVF_CUSTOMVERTEX, 118 D3DPOOL_MANAGED, &g_pVB,NULL ) ) ) 119 120 return E_FAIL; 121 122 123 //填充顶点缓冲区 124 VOID* pVertices; 125 if( FAILED( g_pVB->Lock( 0, sizeof(g_Vertices), (void**)&pVertices, 0 ) ) ) 126 return E_FAIL; 127 memcpy( pVertices, g_Vertices, sizeof(g_Vertices) ); 128 g_pVB->Unlock(); 129 130 return S_OK; 131 132 133 134 //----------------------------------------------------------------------------- 135 // Desc: 释放创建的对象 136 //----------------------------------------------------------------------------- 137 VOID Cleanup() 138 139 //释放纹理对象 140 if( g_pTexture != NULL ) 141 g_pTexture->Release(); 142 143 //释放顶点缓冲区对象 144 if( g_pVB != NULL ) 145 g_pVB->Release(); 146 147 //释放Direct3D设备对象 148 if( g_pd3dDevice != NULL ) 149 g_pd3dDevice->Release(); 150 151 //释放Direct3D对象 152 if( g_pD3D != NULL ) 153 g_pD3D->Release(); 154 155 156 157 //----------------------------------------------------------------------------- 158 // Desc: 渲染图形 159 //----------------------------------------------------------------------------- 160 VOID Render() 161 162 //清空后台缓冲区 163 g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 ); 164 165 //开始在后台缓冲区绘制图形 166 if( SUCCEEDED( g_pd3dDevice->BeginScene() ) ) 167 168 g_pd3dDevice->GetRenderTarget(0, &g_pBackupSur); 169 g_pd3dDevice->SetRenderTarget(0, g_pRenderSur); 170 171 /*RTT*/ 172 g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0 ); 173 g_pd3dDevice->SetTexture( 0, g_pTexture ); //设置纹理 174 g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) ); 175 g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX ); 176 g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2); 177 178 D3DXSaveTextureToFileA("tt.tga", D3DXIFF_TGA, g_pRender2Tex, NULL); 179 180 /*真是场景*/ 181 g_pd3dDevice->SetRenderTarget(0, g_pBackupSur); 182 183 g_pd3dDevice->SetTexture( 0, g_pTexture ); //设置纹理 184 g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) ); 185 g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX ); 186 g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2); 187 188 189 //结束在后台缓冲区绘制图形 190 g_pd3dDevice->EndScene(); 191 192 193 //将在后台缓冲区绘制的图形提交到前台缓冲区显示 194 g_pd3dDevice->Present( NULL, NULL, NULL, NULL ); 195 196 197 198 //----------------------------------------------------------------------------- 199 // Desc: 消息处理 200 //----------------------------------------------------------------------------- 201 LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) 202 203 switch( msg ) 204 205 case WM_DESTROY: 206 Cleanup(); 207 PostQuitMessage( 0 ); 208 return 0; 209 210 211 return DefWindowProc( hWnd, msg, wParam, lParam ); 212 213 214 215 216 //----------------------------------------------------------------------------- 217 // Desc: 入口函数 218 //----------------------------------------------------------------------------- 219 INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT ) 220 221 222 //注册窗口类 223 WNDCLASSEX wc = sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L, 224 GetModuleHandle(NULL), NULL, NULL, NULL, NULL, 225 L"ClassName", NULL ; 226 RegisterClassEx( &wc ); 227 228 //创建窗口 229 HWND hWnd = CreateWindow( L"ClassName", L"纹理影射基础", 230 WS_OVERLAPPEDWINDOW, 200, 100, 800, 600, 231 GetDesktopWindow(), NULL, wc.hInstance, NULL ); 232 233 //初始化Direct3D 234 if( SUCCEEDED( InitD3D( hWnd ) ) ) 235 236 //创建场景图形 237 if( SUCCEEDED( InitGriphics() ) ) 238 239 //显示窗口 240 ShowWindow( hWnd, SW_SHOWDEFAULT ); 241 UpdateWindow( hWnd ); 242 243 //进入消息循环 244 MSG msg; 245 ZeroMemory( &msg, sizeof(msg) ); 246 while( msg.message!=WM_QUIT ) 247 248 if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) ) 249 250 TranslateMessage( &msg ); 251 DispatchMessage( &msg ); 252 253 else 254 255 Render(); //渲染图形 256 257 258 259 260 261 UnregisterClass( L"ClassName", wc.hInstance ); 262 return 0; 263
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