D3D中2D图片的绘制

转自http://blog.csdn.net/rabbit729/article/details/6388703

  想要在D3D中加载2D图片可以使用如下两种方法（我只想到这两种方法，如果有其他方法，请指教）。第一种就是把图片以纹理方式加载，然后以此为纹理绘制一个四边形即可；第二种就是使用2D点精灵，不解释，你懂得；下面分别给出两种方法的代码：

   第一种：绘制四边形

  

 #include <d3dx9.h>


 //-----------------------------------------------------------------------------
 // Desc: 全局变量
 //-----------------------------------------------------------------------------
 LPDIRECT3D9             g_pD3D       = NULL;    //Direct3D对象
 LPDIRECT3DDEVICE9       g_pd3dDevice = NULL;    //Direct3D设备对象
 LPDIRECT3DVERTEXBUFFER9 g_pVB        = NULL;    //顶点缓冲区对象
 LPDIRECT3DTEXTURE9      g_pTex       = NULL;    //纹理


 //-----------------------------------------------------------------------------
 // Desc: 顶点结构
 //-----------------------------------------------------------------------------
 struct CUSTOMVERTEX
 {
     FLOAT x, y, z, rhw;
     FLOAT u, v;
 };
 #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_TEX1)  //顶点格式


 //-----------------------------------------------------------------------------
 // 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_UNKNOWN;

     //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;
     }

     //加载纹理
     if (FAILED(D3DXCreateTextureFromFile(g_pd3dDevice, L"Water lilies.jpg", &g_pTex)))
     {
         return E_FAIL;
     }

     return S_OK;
 }


 //-----------------------------------------------------------------------------
 // Desc: 创建并填充顶点缓冲区
 //-----------------------------------------------------------------------------
 HRESULT InitVB()
 {
     //顶点数据
     CUSTOMVERTEX vertices[] =
     {
         { 100.0f, 100.0f, 0.5f, 1.0f, 0.f, 0.f },
         { 400.0f, 100.0f, 0.5f, 1.0f, 1.f, 0.f},
         { 400.0f, 400.0f, 0.5f, 1.0f, 1.f, 1.f},

         { 100.0f, 100.0f, 0.5f, 1.0f, 0.f, 0.f },
         { 400.0f, 400.0f, 0.5f, 1.0f, 1.f, 1.f},
         { 100.0f, 400.0f, 0.5f, 1.0f, 0.f, 1.f},
     };

     //创建顶点缓冲区
     if( FAILED( g_pd3dDevice->CreateVertexBuffer( 6*sizeof(CUSTOMVERTEX),
                                                   0, D3DFVF_CUSTOMVERTEX,
                                                   D3DPOOL_DEFAULT, &g_pVB, NULL ) ) )
     {
         return E_FAIL;
     }

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

     return S_OK;
 }


 //-----------------------------------------------------------------------------
 // Desc: 释放创建的对象
 //-----------------------------------------------------------------------------
 VOID Cleanup()
 {
     //释放纹理
     if(g_pTex != NULL)
     {
         g_pTex->Release();
     }
     //释放顶点缓冲区对象
     if( g_pVB != NULL )
         g_pVB->Release();

     //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
     g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 );

     //开始在后台缓冲区绘制图形
     if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
     {
         //在后台缓冲区绘制图形
         g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) );
         g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
         g_pd3dDevice->SetTexture(0, g_pTex);
         g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 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"顶点缓冲区",
                               WS_OVERLAPPEDWINDOW, 200, 100, 600, 500,
                               GetDesktopWindow(), NULL, wc.hInstance, NULL );

     //初始化Direct3D
     if( SUCCEEDED( InitD3D( hWnd ) ) )
     {
         //创建并填充顶点缓冲区
         if( SUCCEEDED( InitVB() ) )
         {
             //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;
 }

 

第二种：点精灵

 #include <d3dx9.h>


 //-----------------------------------------------------------------------------
 // Desc: 全局变量
 //-----------------------------------------------------------------------------
 LPDIRECT3D9             g_pD3D       = NULL;    //Direct3D对象
 LPDIRECT3DDEVICE9       g_pd3dDevice = NULL;    //Direct3D设备对象
 LPDIRECT3DTEXTURE9      g_pTex       = NULL;    //纹理
 LPD3DXSPRITE            g_pSprite    = NULL;    //点精灵

 //-----------------------------------------------------------------------------
 // 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_UNKNOWN;

     //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;
     }

     // 创建点精灵
     if (FAILED(D3DXCreateSprite( g_pd3dDevice, &g_pSprite )))
     {
         return E_FAIL;
     }

     //加载纹理
     if (FAILED(D3DXCreateTextureFromFile(g_pd3dDevice, L"Water lilies.jpg", &g_pTex)))
     {
         return E_FAIL;
     }

     return S_OK;
 }


 //-----------------------------------------------------------------------------
 // Desc: 释放创建的对象
 //-----------------------------------------------------------------------------
 VOID Cleanup()
 {
     //释放纹理
     if(g_pTex != NULL)
     {
         g_pTex->Release();
     }
     //释放点精灵
     if (g_pSprite != NULL)
     {
         g_pSprite->Release();
     }

     //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
     g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 );

     //开始在后台缓冲区绘制图形
     if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
     {
         if ( SUCCEEDED( g_pSprite->Begin(D3DXSPRITE_ALPHABLEND) ) )
         {
             g_pSprite->Draw(g_pTex, NULL, NULL, NULL, 0xffffffff);
             g_pSprite->End();
         }
         //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"顶点缓冲区",
                               WS_OVERLAPPEDWINDOW, 200, 100, 800, 600,
                               GetDesktopWindow(), NULL, wc.hInstance, NULL );

     //初始化Direct3D
     if( SUCCEEDED( InitD3D( hWnd ) ) )
     {
         //创建并填充顶点缓冲区
         if( SUCCEEDED( TRUE ) )
         {
             //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;
 }