DirectX9基础代码--纹理

//============================================================================= // Desc: 多级渐进纹理 //============================================================================= #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_pMipTex = NULL; //多级渐进纹理 LPDIRECT3DTEXTURE9 g_pTexture = NULL; //非多级渐进纹理 float g_fDistance = -10; //摄影机距图形的距离 bool g_bUseMipTex = true; //标志是否使用多级渐进纹理 //----------------------------------------------------------------------------- // Desc: 顶点结构 //----------------------------------------------------------------------------- struct CUSTOMVERTEX { FLOAT x, y, z; //顶点位置 FLOAT u,v ; //顶点纹理坐标 }; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ | D3DFVF_TEX1) //----------------------------------------------------------------------------- // 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; } //禁用照明效果 g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE ); //设置纹理过滤方式 g_pd3dDevice->SetSamplerState(0, D3DSAMP_MIPFILTER, D3DTEXF_LINEAR); return S_OK; } //----------------------------------------------------------------------------- // Desc: 创建场景图形 //----------------------------------------------------------------------------- HRESULT InitGriphics() { //创建多级渐进纹理 if( FAILED( D3DXCreateTextureFromFileEx( g_pd3dDevice, L"texture.jpg", 0, 0, //纹理宽度和高度, "0"表示以图形文件的宽度和高度作为纹理的宽度和高度 0, //渐进纹理序列级数,指定为0表示尽可能多的生成纹理序列 0, //纹理使用方式, 一般为0 D3DFMT_X8R8G8B8, //纹理图形格式 D3DPOOL_MANAGED, //纹理资源的内存类型 D3DX_DEFAULT, D3DX_DEFAULT, 0xFF000000,0,0, &g_pMipTex ) ) ) { return E_FAIL; } //创建非多级渐进纹理纹理 if( FAILED( D3DXCreateTextureFromFileEx( g_pd3dDevice, L"texture.jpg", 0, 0, //纹理宽度和高度, "0"表示以图形文件的宽度和高度作为纹理的宽度和高度 1, //渐进纹理序列级数 1 表示只生成一级纹理序列 0, //纹理使用方式, 一般为0 D3DFMT_X8R8G8B8, //纹理图形格式 D3DPOOL_MANAGED, //纹理资源的内存类型 D3DX_DEFAULT, D3DX_DEFAULT, 0xFF000000,0,0, &g_pTexture ) ) ) { return E_FAIL; } //顶点数据 CUSTOMVERTEX g_Vertices[] = { #define fdiv 80.f { -3, -3, 0.0f, 0.0f, 1.0f}, { -3, 3, 0.0f, 0.0f, 0.0f}, { 3, -3, 0.0f, 1.0f, 1.0f}, { 3, 3, 0.0f, 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() { //释放多级渐进纹理对象 if( g_pMipTex != NULL ) g_pMipTex->Release(); //释放多级渐进纹理对象 if( g_pTexture != NULL ) g_pTexture->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: 设置变换矩阵 //----------------------------------------------------------------------------- VOID SetupMatrices() { //世界矩阵 D3DXMATRIXA16 matWorld; D3DXMatrixIdentity( &matWorld ); g_pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld ); //观察矩阵, 观察点根据输入逐渐拉近或变远 D3DXVECTOR3 vEyePt( 0.0f, 0.0f, g_fDistance ); 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 ); //投影矩阵 D3DXMATRIXA16 matProj; D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 100.0f ); g_pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj ); } //----------------------------------------------------------------------------- // 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 ); SetupMatrices(); //设置变换矩阵, //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 if(g_bUseMipTex==true) g_pd3dDevice->SetTexture( 0, g_pMipTex ); //使用多级渐进纹理 else g_pd3dDevice->SetTexture( 0, g_pTexture ); //使用普通纹理 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; case WM_KEYDOWN: switch(wParam) { case 49: //“1”键, 使用多级渐进纹理 g_bUseMipTex = true; break; case 50: //“2”键, 不使用多级渐进纹理 g_bUseMipTex = false; break; case VK_DOWN: g_fDistance -= 0.1f; break; case VK_UP: g_fDistance += 0.1f; break; } return 0; } return DefWindowProc( hWnd, msg, wParam, lParam ); } //----------------------------------------------------------------------------- // Desc: 入口函数 //------------