D3D API – D3DXCreateRenderToSurface渲染到纹理

一 初始化：

//创建纹理对象 if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, L”shitoub01.jpg”, &g_pTexture ) ) ) { MessageBox(NULL, L”创建纹理失败”, L”Texture.exe”, MB_OK); return E_FAIL; }

HRESULT hr; hr = D3DXCreateTexture(g_pd3dDevice, 256,256,1,D3DUSAGE_RENDERTARGET|D3DUSAGE_AUTOGENMIPMAP, D3DFMT_X8R8G8B8,D3DPOOL_DEFAULT,&g_pTexture2); D3DSURFACE_DESC desc; g_pTexture2->GetLevelDesc(0,&desc); hr = D3DXCreateRenderToSurface(g_pd3dDevice,desc.Width,desc.Height,desc.Format,true,D3DFMT_D24S8,&g_pRTS); hr = g_pTexture2->GetSurfaceLevel(0,&g_pSurface); 二 使用： //开始在后台缓冲区绘制图形 if( SUCCEEDED( g_pd3dDevice->BeginScene() )) { SetupWorld(); SetupMatrices();

D3DVIEWPORT9 vp = {0,0,256,256,0,1}; g_pd3dDevice->EndScene(); g_pRTS->BeginScene(g_pSurface, &vp); g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER | D3DCLEAR_STENCIL,D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 ); g_pd3dDevice->SetTexture(0, g_pTexture); g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1); g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE); g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_DISABLE); g_pd3dDevice->SetStreamSource(0, g_pVB, 0, sizeof(CUSTOMVERTEX)); g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX); g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2); D3DXSaveSurfaceToFileA(“tt.bmp”,D3DXIFF_BMP, g_pSurface, NULL, NULL); g_pRTS->EndScene(D3DX_FILTER_NONE);

g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER | D3DCLEAR_STENCIL, D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 ); g_pd3dDevice->BeginScene() ; g_pd3dDevice->SetTexture(0, g_pTexture2); g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_SELECTARG1); g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE); g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_DISABLE);

g_pd3dDevice->SetStreamSource(0, g_pVB, 0, sizeof(CUSTOMVERTEX)); g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX); g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP, 0, 2);

//结束在后台缓冲区绘制图形 g_pd3dDevice->EndScene(); }

三 程序：

// ============================================================================= // Desc: 纹理影射基础 // ============================================================================= #include < d3dx9.h >

// —————————————————————————– // Desc: 全局变量 // —————————————————————————– LPDIRECT3D9 g_pD3D = NULL; // Direct3D对象 LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Direct3D设备对象 HWND g_hWnd = NULL;

LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL; // 顶点缓冲区对象 LPDIRECT3DTEXTURE9 g_pTexture = NULL; // 纹理对象 LPDIRECT3DTEXTURE9 g_pTexture2 = NULL; // 纹理对象 ID3DXRenderToSurface * g_pRTS = NULL; LPDIRECT3DSURFACE9 g_pSurface = NULL;

// —————————————————————————– // Desc: 顶点结构 // —————————————————————————– struct CUSTOMVERTEX { FLOAT x, y, z,w; // 顶点位置 DWORD diffuse; FLOAT u,v ; // 顶点纹理坐标 }; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE|D3DFVF_TEX1)

void SetupWorld() { // 创建并设置世界矩阵 D3DXMATRIXA16 matWorld; D3DXMatrixIdentity( & matWorld ); g_pd3dDevice -> SetTransform( D3DTS_WORLD, & matWorld ); }

// —————————————————————————– // Desc: 设置变换矩阵 // —————————————————————————– VOID SetupMatrices() { // 创建并设置观察矩阵 D3DXVECTOR3 vEyePt( 0.0f , 0.0f , – 5 ); D3DXVECTOR3 vLookatPt( 0.0f , 0.0f , 0.0f ); D3DXVECTOR3 vUpVec( 0.0f , 1.0f , 0.0f ); D3DXMATRIXA16 matView; D3DXMatrixLookAtLH( & matView, & vEyePt, & vLookatPt, & vUpVec ); g_pd3dDevice -> SetTransform( D3DTS_VIEW, & matView );

// 创建并设置投影矩阵 D3DXMATRIXA16 matProj; D3DXMatrixPerspectiveFovLH( & matProj, D3DX_PI / 2 , 1.0f , 1.0f , 100.0f ); g_pd3dDevice -> SetTransform( D3DTS_PROJECTION, & matProj ); }

// —————————————————————————– // Desc: 初始化Direct3D // —————————————————————————– HRESULT InitD3D( HWND hWnd ) { // 创建Direct3D对象, 该对象用于创建Direct3D设备对象 if ( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) ) return E_FAIL;

// 设置D3DPRESENT_PARAMETERS结构, 准备创建Direct3D设备对象 D3DPRESENT_PARAMETERS d3dpp; ZeroMemory( & d3dpp, sizeof (d3dpp) ); d3dpp.Windowed = TRUE; d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8; d3dpp.EnableAutoDepthStencil = TRUE; d3dpp.AutoDepthStencilFormat = D3DFMT_D24S8;

// 创建Direct3D设备对象 if ( FAILED( g_pD3D -> CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, & d3dpp, & g_pd3dDevice ) ) ) { return E_FAIL; }

// 禁用照明效果 g_pd3dDevice -> SetRenderState( D3DRS_LIGHTING, FALSE );

// 设置变换矩阵 SetupWorld(); SetupMatrices();

return S_OK; }

// —————————————————————————– HRESULT InitGriphics() { // 创建纹理对象 if ( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, L “ shitoub01.jpg “ , & g_pTexture ) ) ) { MessageBox(NULL, L “ 创建纹理失败 “ , L “ Texture.exe “ , MB_OK); return E_FAIL; }

HRESULT hr; hr = D3DXCreateTexture(g_pd3dDevice, 256 , 256 , 1 ,D3DUSAGE_RENDERTARGET | D3DUSAGE_AUTOGENMIPMAP, D3DFMT_X8R8G8B8,D3DPOOL_DEFAULT, & g_pTexture2); D3DSURFACE_DESC desc; g_pTexture2 -> GetLevelDesc( 0 , & desc); hr = D3DXCreateRenderToSurface(g_pd3dDevice,desc.Width,desc.Height,desc.Format, true ,D3DFMT_D24S8, & g_pRTS); hr = g_pTexture2 -> GetSurfaceLevel( 0 , & g_pSurface);

// 顶点数据 CUSTOMVERTEX g_Vertices[] = { { 0 , 256 , 0.5f , 1.0f , 0xffffffff , 0.0f , 1.0f }, { 0 , 0 , 0.5f , 1.0f , 0xffffffff , 0.0f , 0.0f }, { 256 , 256 , 0.5f , 1.0f , 0xffffffff , 1.0f , 1.0f }, { 256 , 0 , 0.5f , 1.0f , 0xffffffff , 1.0f , 0.0f }

};

// 创建顶点缓冲区 if ( FAILED( g_pd3dDevice -> CreateVertexBuffer( 4 * sizeof (CUSTOMVERTEX), 0 , D3DFVF_CUSTOMVERTEX, D3DPOOL_MANAGED, & g_pVB,NULL ) ) ) { return E_FAIL; }

// 填充顶点缓冲区 VOID * pVertices; if ( FAILED( g_pVB -> Lock( 0 , sizeof (g_Vertices), ( void ** ) & pVertices, 0 ) ) ) return E_FAIL; memcpy( pVertices, g_Vertices, sizeof (g_Vertices) ); g_pVB -> Unlock();

return S_OK; }

// —————————————————————————– // Desc: 释放创建的对象 // —————————————————————————– VOID Cleanup() { // 释放Direct3D设备对象 if ( g_pd3dDevice != NULL ) g_pd3dDevice -> Release();

// 释放Direct3D对象 if ( g_pD3D != NULL ) g_pD3D -> Release(); }

// —————————————————————————– // Desc: 渲染图形 // —————————————————————————– VOID Render() { // 清空后台缓冲区

// 开始在后台缓冲区绘制图形 // if( SUCCEEDED( ) { SetupWorld(); SetupMatrices();

D3DVIEWPORT9 vp = { 0 , 0 , 256 , 256 , 0 , 1 }; g_pRTS -> BeginScene(g_pSurface, & vp); g_pd3dDevice -> Clear( 0 , NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER | D3DCLEAR_STENCIL,D3DCOLOR_XRGB( 45 , 50 , 170 ), 1.0f , 0 ); g_pd3dDevice -> SetTexture( 0 , g_pTexture); g_pd3dDevice -> SetTextureStageState( 0 , D3DTSS_COLOROP, D3DTOP_SELECTARG1); g_pd3dDevice -> SetTextureStageState( 0 , D3DTSS_COLORARG1, D3DTA_TEXTURE); g_pd3dDevice -> SetTextureStageState( 0 , D3DTSS_ALPHAOP, D3DTOP_DISABLE); g_pd3dDevice -> SetStreamSource( 0 , g_pVB, 0 , sizeof (CUSTOMVERTEX)); g_pd3dDevice -> SetFVF(D3DFVF_CUSTOMVERTEX); g_pd3dDevice -> DrawPrimitive(D3DPT_TRIANGLESTRIP, 0 , 2 ); D3DXSaveSurfaceToFileA( “ tt.bmp “ ,D3DXIFF_BMP, g_pSurface, NULL, NULL); g_pRTS -> EndScene(D3DX_FILTER_NONE);

g_pd3dDevice -> Clear( 0 , NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER | D3DCLEAR_STENCIL, D3DCOLOR_XRGB( 45 , 50 , 170 ), 1.0f , 0 ); g_pd3dDevice -> BeginScene() ; g_pd3dDevice -> SetTexture( 0 , g_pTexture2); g_pd3dDevice -> SetTextureStageState( 0 , D3DTSS_COLOROP, D3DTOP_SELECTARG1); g_pd3dDevice -> SetTextureStageState( 0 , D3DTSS_COLORARG1, D3DTA_TEXTURE); g_pd3dDevice -> SetTextureStageState( 0 , D3DTSS_ALPHAOP, D3DTOP_DISABLE);

g_pd3dDevice -> SetStreamSource( 0 , g_pVB, 0 , sizeof (CUSTOMVERTEX)); g_pd3dDevice -> SetFVF(D3DFVF_CUSTOMVERTEX); g_pd3dDevice -> DrawPrimitive(D3DPT_TRIANGLESTRIP, 0 , 2 );

// 结束在后台缓冲区绘制图形 g_pd3dDevice -> EndScene(); }

// 将在后台缓冲区绘制的图形提交到前台缓冲区显示 g_pd3dDevice -> Present( NULL, NULL, NULL, NULL ); }

// —————————————————————————– // Desc: 消息处理 // —————————————————————————– LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) { switch ( msg ) { case WM_DESTROY: Cleanup(); PostQuitMessage( 0 ); return 0 ; }

return DefWindowProc( hWnd, msg, wParam, lParam ); }

// —————————————————————————– // Desc: 入口函数 // —————————————————————————– INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT ) {

// 注册窗口类 WNDCLASSEX wc = { sizeof (WNDCLASSEX), CS_CLASSDC, MsgProc, 0L , 0L , GetModuleHandle(NULL), NULL, NULL, NULL, NULL, L “ ClassName “ , NULL }; RegisterClassEx( & wc );

// 创建窗口 HWND hWnd = CreateWindow( L “ ClassName “ , L “ 纹理影射基础 “ , WS_OVERLAPPEDWINDOW, 200 , 100 , 800 , 600 , GetDesktopWindow(), NULL, wc.hInstance, NULL ); g_hWnd = hWnd;

// 初始化Direct3D if ( SUCCEEDED( InitD3D( hWnd ) ) ) { // 创建场景图形 if ( SUCCEEDED(InitGriphics()) ) {

// 显示窗口 ShowWindow( hWnd, SW_SHOWDEFAULT ); UpdateWindow( hWnd );

// 进入消息循环 MSG msg; ZeroMemory( & msg, sizeof (msg) ); while ( msg.message != WM_QUIT ) { if ( PeekMessage( & msg, NULL, 0U , 0U , PM_REMOVE ) ) { TranslateMessage( & msg ); DispatchMessage( & msg ); } else { Render(); // 渲染图形 } } } }

UnregisterClass( L “ ClassName “ , wc.hInstance ); return 0 ; }

发布者：全栈程序员栈长，转载请注明出处：https://javaforall.cn/110646.html原文链接：https://javaforall.cn