appframe.cpp

DX例子中等难度的。全是新例子。VC2003

//=============================================================================
// Desc: 主程序源文件
//=============================================================================
#include "dxstdafx.h"
#include "resource.h"

//-----------------------------------------------------------------------------
// 全局变量
//-----------------------------------------------------------------------------
ID3DXFont*                 g_pFont = NULL;          //ID3DXFont字体对象
ID3DXSprite*               g_pTextSprite = NULL;    //ID3DXSprite文本精灵对象
bool                       g_bShowHelp = true;      //标识是否显示简单帮助信息

//-----------------------------------------------------------------------------
// 控件ID
//-----------------------------------------------------------------------------
#define IDC_TOGGLEFULLSCREEN      1
#define IDC_TOGGLEREF             2
#define IDC_CHANGEDEVICE          3

//-----------------------------------------------------------------------------
// Desc: 函数声明
//------------------------------------------------------------------------------
bool CALLBACK IsDeviceAcceptable( D3DCAPS9* pCaps, D3DFORMAT AdapterFormat, 
D3DFORMAT BackBufferFormat, bool bWindowed, void* pUserContext );
bool CALLBACK ModifyDeviceSettings( DXUTDeviceSettings* pDeviceSettings, 
const D3DCAPS9* pCaps, void* pUserContext );
HRESULT CALLBACK OnCreateDevice( IDirect3DDevice9* pd3dDevice, 
const D3DSURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext );
HRESULT CALLBACK OnResetDevice( IDirect3DDevice9* pd3dDevice, 
const D3DSURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext );
void    CALLBACK OnFrameMove( IDirect3DDevice9* pd3dDevice, double fTime, 
float fElapsedTime, void* pUserContext );
void    CALLBACK OnFrameRender( IDirect3DDevice9* pd3dDevice, double fTime,
 float fElapsedTime, void* pUserContext );
LRESULT CALLBACK MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam,
 bool* pbNoFurtherProcessing, void* pUserContext );
void    CALLBACK KeyboardProc( UINT nChar, bool bKeyDown, bool bAltDown, void* pUserContext );
void    CALLBACK OnGUIEvent( UINT nEvent, int nControlID, CDXUTControl* pControl, 
void* pUserContext );
void    CALLBACK OnLostDevice( void* pUserContext );
void    CALLBACK OnDestroyDevice( void* pUserContext );

void    InitApp();
void    RenderText();

//-----------------------------------------------------------------------------
// Desc: 入口函数
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE, HINSTANCE, LPSTR, int )
{
    //为Debug配置启用运行时内存检查功能
#if defined(DEBUG) | defined(_DEBUG)
    _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif

    //设置回调函数
    DXUTSetCallbackDeviceCreated( OnCreateDevice );
    DXUTSetCallbackDeviceReset( OnResetDevice );
    DXUTSetCallbackDeviceLost( OnLostDevice );
    DXUTSetCallbackDeviceDestroyed( OnDestroyDevice );
    DXUTSetCallbackMsgProc( MsgProc );
    DXUTSetCallbackKeyboard( KeyboardProc );
    DXUTSetCallbackFrameRender( OnFrameRender );
    DXUTSetCallbackFrameMove( OnFrameMove );

	//应用程序相关的初始化
	InitApp();

	//初始化DXUT, 创建窗口, 创建Direct3D设备对象
	DXUTInit( true, true, true );
	DXUTSetCursorSettings( true, true );
	DXUTCreateWindow( L"AppFrame" );
	DXUTCreateDevice( D3DADAPTER_DEFAULT, true, 640, 480, 
		             IsDeviceAcceptable, ModifyDeviceSettings );

	//进入消息循环和场景渲染
	DXUTMainLoop();

	//在此进行应用程序相关的清除工作

	return DXUTGetExitCode();
}

//-----------------------------------------------------------------------------
// Desc: 应用程序相关初始化
//-----------------------------------------------------------------------------
void InitApp()
{
}

//-----------------------------------------------------------------------------
// Desc: 设备能力检查
//-----------------------------------------------------------------------------
bool CALLBACK IsDeviceAcceptable( D3DCAPS9* pCaps, D3DFORMAT AdapterFormat, 
                                  D3DFORMAT BackBufferFormat, bool bWindowed, 
								  void* pUserContext )
{
	//检查后台缓冲区格式是否支持Alpha混合等操作(post pixel blending operations)
    IDirect3D9* pD3D = DXUTGetD3DObject(); 
    if( FAILED( pD3D->CheckDeviceFormat( pCaps->AdapterOrdinal, pCaps->DeviceType,
                    AdapterFormat, D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING, 
                    D3DRTYPE_TEXTURE, BackBufferFormat ) ) )
        return false;

    return true;
}

//-----------------------------------------------------------------------------
// Desc: 修改Direct3D渲染设备设置
//-----------------------------------------------------------------------------
bool CALLBACK ModifyDeviceSettings( DXUTDeviceSettings* pDeviceSettings, 
								    const D3DCAPS9* pCaps, void* pUserContext )
{
    //如果不支持硬件顶点处理则使用软件顶点处理
    if( (pCaps->DevCaps & D3DDEVCAPS_HWTRANSFORMANDLIGHT) == 0)
    {
        pDeviceSettings->BehaviorFlags = D3DCREATE_SOFTWARE_VERTEXPROCESSING;
    }

	//如果使用参考设备,则弹出警告对话框
    static bool s_bFirstTime = true;
    if( s_bFirstTime )
    {
        s_bFirstTime = false;
        if( pDeviceSettings->DeviceType == D3DDEVTYPE_REF )
            DXUTDisplaySwitchingToREFWarning();
    }

    return true;
}

//-----------------------------------------------------------------------------
// Desc: 在此创建管理内存资源对象
//-----------------------------------------------------------------------------
HRESULT CALLBACK OnCreateDevice( IDirect3DDevice9* pd3dDevice, 
								const D3DSURFACE_DESC* pBackBufferSurfaceDesc, 
								void* pUserContext )
{
    HRESULT hr;
    
    //创建字体
    V_RETURN( D3DXCreateFont( pd3dDevice, 15, 0, FW_BOLD, 1, FALSE, DEFAULT_CHARSET, 
                         OUT_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, 
                         L"Arial", &g_pFont ) );

    return S_OK;
}

//-----------------------------------------------------------------------------
// Desc: 在此创建默认内存类型资源对象
//-----------------------------------------------------------------------------
HRESULT CALLBACK OnResetDevice( IDirect3DDevice9* pd3dDevice, 
                                const D3DSURFACE_DESC* pBackBufferSurfaceDesc, 
								void* pUserContext )
{
    HRESULT hr;

	//恢复字体
    if( g_pFont )
        V_RETURN( g_pFont->OnResetDevice() );
   
	//创建ID3DXSprite接口对象
    V_RETURN( D3DXCreateSprite( pd3dDevice, &g_pTextSprite ) );

	//设置观察矩阵
	D3DXMATRIXA16 matView;
	D3DXVECTOR3 vEyePt( 0.0f, 0.0f,-5 );
    D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f );
    D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );
    D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );
    pd3dDevice->SetTransform( D3DTS_VIEW, &matView );

	//设置投影矩阵
	D3DXMATRIXA16 matProj;
	float fAspectRatio = (float)pBackBufferSurfaceDesc->Width / pBackBufferSurfaceDesc->Height;
    D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, fAspectRatio, 1.0f, 100.0f );
    pd3dDevice->SetTransform( D3DTS_PROJECTION, &matProj );

    return S_OK;
}

//-----------------------------------------------------------------------------
// Desc: 更新场景
//-----------------------------------------------------------------------------
void CALLBACK OnFrameMove( IDirect3DDevice9* pd3dDevice, double fTime, 
						   float fElapsedTime, void* pUserContext )
{
}

//-----------------------------------------------------------------------------
// Desc: 渲染场景
//-----------------------------------------------------------------------------
void CALLBACK OnFrameRender( IDirect3DDevice9* pd3dDevice, double fTime, 
							float fElapsedTime, void* pUserContext )
{
    HRESULT hr;

    //清除后台颜色缓冲区和深度缓冲区
    V( pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 
		                 D3DCOLOR_ARGB(0, 45, 50, 170), 1.0f, 0) );

    //渲染场景
    if( SUCCEEDED( pd3dDevice->BeginScene() ) )
    {
		//渲染文本
        DXUT_BeginPerfEvent( DXUT_PERFEVENTCOLOR, L"HUD / Stats" ); 
        RenderText();
        DXUT_EndPerfEvent();

        V( pd3dDevice->EndScene() );
    }
}

//-----------------------------------------------------------------------------
// Desc: 渲染文本
//-----------------------------------------------------------------------------
void RenderText()
{
    CDXUTTextHelper txtHelper( g_pFont, g_pTextSprite, 15 );

    //显示当前Direct3D设备状态和渲染帧速率
    txtHelper.Begin();
    txtHelper.SetInsertionPos( 5, 5 );
    txtHelper.SetForegroundColor( D3DXCOLOR( 1.0f, 1.0f, 0.0f, 1.0f ) );
    txtHelper.DrawTextLine( DXUTGetFrameStats(true) );
    txtHelper.DrawTextLine( DXUTGetDeviceStats() );

	//显示其他简要信息
    txtHelper.SetForegroundColor( D3DXCOLOR( 1.0f, 1.0f, 1.0f, 1.0f ) );
    txtHelper.DrawTextLine( L"Put whatever misc status here" );
    
    //显示简单帮助文本
    const D3DSURFACE_DESC* pd3dsdBackBuffer = DXUTGetBackBufferSurfaceDesc();
    if( g_bShowHelp )
    {
        txtHelper.SetInsertionPos( 10, pd3dsdBackBuffer->Height-15*6 );
        txtHelper.SetForegroundColor( D3DXCOLOR( 1.0f, 0.75f, 0.0f, 1.0f ) );
        txtHelper.DrawTextLine( L"Controls (F1 to hide):" );

        txtHelper.SetInsertionPos( 40, pd3dsdBackBuffer->Height-15*5 );
        txtHelper.DrawTextLine( L"Quit: ESC" );
    }
    else
    {
        txtHelper.SetInsertionPos( 10, pd3dsdBackBuffer->Height-15*2 );
        txtHelper.SetForegroundColor( D3DXCOLOR( 1.0f, 1.0f, 1.0f, 1.0f ) );
        txtHelper.DrawTextLine( L"Press F1 for help" );
    }
    txtHelper.End();
}

//-----------------------------------------------------------------------------
// Desc: 消息处理
//-----------------------------------------------------------------------------
LRESULT CALLBACK MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, 
						 bool* pbNoFurtherProcessing, void* pUserContext )
{
    return 0;
}

//-----------------------------------------------------------------------------
// Desc: 键盘消息处理
//-----------------------------------------------------------------------------
void CALLBACK KeyboardProc( UINT nChar, bool bKeyDown, bool bAltDown, void* pUserContext )
{
    if( bKeyDown )
    {
        switch( nChar )
        {
            case VK_F1: g_bShowHelp = !g_bShowHelp; break;
        }
    }
}


//-----------------------------------------------------------------------------
// Desc: 释放在OnResetDevice()中创建的资源
//-----------------------------------------------------------------------------
void CALLBACK OnLostDevice( void* pUserContext )
{
    if( g_pFont )
        g_pFont->OnLostDevice();
    SAFE_RELEASE( g_pTextSprite );
}

//------------------------------------------------------------------------------
// Desc: 释放在OnCreateDevice()中创建的资源
//------------------------------------------------------------------------------
void CALLBACK OnDestroyDevice( void* pUserContext )
{
    SAFE_RELEASE( g_pFont );
}