D3D纹理小例

#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
//-----------------------------------------------------------------------------

bool InitATexture(int iX, int iY)
{
	// 默认是 32bit D3DFMT_A8R8G8B8
	if(g_pd3dDevice->CreateTexture(iX,iY,1,D3DUSAGE_DYNAMIC,D3DFMT_A8R8G8B8,D3DPOOL_DEFAULT,&g_pTex,NULL) != D3D_OK)
		return false;

	D3DLOCKED_RECT LockedRect;
	if(g_pTex->LockRect(0,&LockedRect,NULL,D3DLOCK_DISCARD) != D3D_OK)
		return false;

	int iTextureSize=iX*iY*4;
	unsigned char *pucSourceData=new unsigned char[iTextureSize];
	ZeroMemory(pucSourceData,iTextureSize);
	/*这里你要对pdwSourceData的内容初始化,我只做了一个ZeroMemory,这样做的后果就是图片时全黑的*/

	memcpy(LockedRect.pBits,pucSourceData,iTextureSize);
	delete[]pucSourceData;
	g_pTex->UnlockRect(0);

	return true;
}

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(!InitATexture(200,200)) {
		return E_FAIL;
	}

	//if (FAILED(D3DXCreateTextureFromFile(g_pd3dDevice, L"Image1.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 main( 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;
}