一天搞定DXUT三步曲之二:添加文本
添加文本比较简单,自己看源码吧,我就不多说了
//--------------------------------------------------------------------------------------
// File: chap13_text_dx9.cpp
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//--------------------------------------------------------------------------------------
#include "DXUT.h"
#include "resource.h"
#include "SDKmisc.h"//CDXUTTextHelper这个需要
//Global variables
ID3DXFont* g_font;
ID3DXSprite* g_text_sprite;
bool g_show_help = true;
#define release_com(p) do { if(p) { (p)->Release(); (p) = NULL; } } while(0)
//--------------------------------------------------------------------------------------
// Rejects any D3D9 devices that aren't acceptable to the app by returning false
//--------------------------------------------------------------------------------------
bool CALLBACK IsD3D9DeviceAcceptable( D3DCAPS9* pCaps, D3DFORMAT AdapterFormat, D3DFORMAT BackBufferFormat,
bool bWindowed, void* pUserContext )
{
// Typically want to skip back buffer formats that don't support alpha blending
IDirect3D9* pD3D = DXUTGetD3D9Object();
if( FAILED( pD3D->CheckDeviceFormat( pCaps->AdapterOrdinal, pCaps->DeviceType,
AdapterFormat, D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING,
D3DRTYPE_TEXTURE, BackBufferFormat ) ) )
return false;
return true;
}
//--------------------------------------------------------------------------------------
// Before a device is created, modify the device settings as needed
//--------------------------------------------------------------------------------------
bool CALLBACK ModifyDeviceSettings( DXUTDeviceSettings* pDeviceSettings, void* pUserContext )
{
return true;
}
//--------------------------------------------------------------------------------------
// Create any D3D9 resources that will live through a device reset (D3DPOOL_MANAGED)
// and aren't tied to the back buffer size
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D9CreateDevice( IDirect3DDevice9* pd3dDevice, const D3DSURFACE_DESC* pBackBufferSurfaceDesc,
void* pUserContext )
{
//初始化ID3DXSprite和ID3DXFont对象
D3DXCreateFont(pd3dDevice, 18, 0, FW_BOLD, 1, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, DEFAULT_QUALITY,
DEFAULT_PITCH | FF_DONTCARE, L"Arial", &g_font);
return S_OK;
}
//--------------------------------------------------------------------------------------
// Create any D3D9 resources that won't live through a device reset (D3DPOOL_DEFAULT)
// or that are tied to the back buffer size
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D9ResetDevice( IDirect3DDevice9* pd3dDevice, const D3DSURFACE_DESC* pBackBufferSurfaceDesc,
void* pUserContext )
{
g_font->OnResetDevice();
D3DXCreateSprite(pd3dDevice, &g_text_sprite);
// setup view matrix
D3DXMATRIX mat_view;
D3DXVECTOR3 eye(0.0f, 0.0f, -5.0f);
D3DXVECTOR3 at(0.0f, 0.0f, 0.0f);
D3DXVECTOR3 up(0.0f, 1.0f, 0.0f);
D3DXMatrixLookAtLH(&mat_view, &eye, &at, &up);
pd3dDevice->SetTransform(D3DTS_VIEW, &mat_view);
// set projection matrix
D3DXMATRIX mat_proj;
float aspect = (float)pBackBufferSurfaceDesc->Width / pBackBufferSurfaceDesc->Height;
D3DXMatrixPerspectiveFovLH(&mat_proj, D3DX_PI/4, aspect, 1.0f, 100.0f);
pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat_proj);
return S_OK;
}
//--------------------------------------------------------------------------------------
// Handle updates to the scene. This is called regardless of which D3D API is used
//--------------------------------------------------------------------------------------
void CALLBACK OnFrameMove( double fTime, float fElapsedTime, void* pUserContext )
{
}
void RenderText()
{
CDXUTTextHelper text_helper(g_font, g_text_sprite, 20);
text_helper.Begin();
//show frame and device states
text_helper.SetInsertionPos(5, 5);
text_helper.SetForegroundColor(D3DXCOLOR(1.0f, 0.475f, 0.0f, 1.0f));
text_helper.DrawTextLine(DXUTGetFrameStats(true));
text_helper.DrawTextLine(DXUTGetDeviceStats());//知识点1
/*知识点1:DXUT统计函数
---------------------------------------------
来自<<DXUT框架剖析（11）>>
---------------------------------------------
DXUTGetFPS 获取当前每秒提交的帧数
DXUTGetFrameStats 获取一个指向字符串的指针，该字符串包括每秒帧数、分辨率、后台缓冲区格式、深度缓冲区格式。
DXUTGetDeviceStats 获取一个指向字符串的指针，该字符串包括当前设备类型、顶点运算行为和设备名。
*/
// show other simple information
text_helper.SetForegroundColor( D3DXCOLOR(1.0f, 1.0f, 1.0f, 1.0f));
text_helper.DrawTextLine(L"Put whatever misc status here");
//show helper information
const D3DSURFACE_DESC* surface_desc = DXUTGetD3D9BackBufferSurfaceDesc();
if(g_show_help)
{
text_helper.SetInsertionPos(10, surface_desc->Height - 15 * 6);
text_helper.SetForegroundColor( D3DXCOLOR(1.0f, 0.475f, 0.0f, 1.0f));
text_helper.DrawTextLine(L"Controls(F1 to hide):");
text_helper.SetInsertionPos(40, surface_desc->Height - 15 * 5);
text_helper.DrawTextLine(L"Quit: ESC");
}
else
{
text_helper.SetInsertionPos(10, surface_desc->Height - 15 * 4);
text_helper.SetForegroundColor( D3DXCOLOR(1.0f, 1.0f, 1.0f, 1.0f));
text_helper.DrawTextLine(L"Press F1 for help");
}
text_helper.End();
}
//--------------------------------------------------------------------------------------
// Render the scene using the D3D9 device
//--------------------------------------------------------------------------------------
void CALLBACK OnD3D9FrameRender( IDirect3DDevice9* pd3dDevice, double fTime, float fElapsedTime, void* pUserContext )
{
HRESULT hr;
// Clear the render target and the zbuffer
V( pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_ARGB( 0, 45, 50, 170 ), 1.0f, 0 ) );
// Render the scene
if( SUCCEEDED( pd3dDevice->BeginScene() ) )
{
RenderText();
V( pd3dDevice->EndScene() );
}
}
//--------------------------------------------------------------------------------------
// Handle messages to the application
//--------------------------------------------------------------------------------------
LRESULT CALLBACK MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam,
bool* pbNoFurtherProcessing, void* pUserContext )
{
return 0;
}
//--------------------------------------------------------------------------------------
// Release D3D9 resources created in the OnD3D9ResetDevice callback
//--------------------------------------------------------------------------------------
void CALLBACK OnD3D9LostDevice( void* pUserContext )
{
g_font->OnLostDevice();
release_com(g_text_sprite);
}
//--------------------------------------------------------------------------------------
// Release D3D9 resources created in the OnD3D9CreateDevice callback
//--------------------------------------------------------------------------------------
void CALLBACK OnD3D9DestroyDevice( void* pUserContext )
{
release_com(g_font);
}
void CALLBACK OnKeyboardProc(UINT character, bool is_key_down, bool is_alt_down, void* user_context)
{
if(is_key_down)
{
switch(character)
{
case VK_F1:
g_show_help = !g_show_help;
break;
}
}
}
//--------------------------------------------------------------------------------------
// Initialize everything and go into a render loop
//--------------------------------------------------------------------------------------
INT WINAPI wWinMain( HINSTANCE, HINSTANCE, LPWSTR, int )
{
// Enable run-time memory check for debug builds.
#if defined(DEBUG) | defined(_DEBUG)
_CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif
// Set the callback functions
DXUTSetCallbackD3D9DeviceAcceptable( IsD3D9DeviceAcceptable );
DXUTSetCallbackD3D9DeviceCreated( OnD3D9CreateDevice );
DXUTSetCallbackD3D9DeviceReset( OnD3D9ResetDevice );
DXUTSetCallbackD3D9FrameRender( OnD3D9FrameRender );
DXUTSetCallbackD3D9DeviceLost( OnD3D9LostDevice );
DXUTSetCallbackD3D9DeviceDestroyed( OnD3D9DestroyDevice );
DXUTSetCallbackDeviceChanging( ModifyDeviceSettings );
DXUTSetCallbackMsgProc( MsgProc );
DXUTSetCallbackFrameMove( OnFrameMove );
DXUTSetCallbackKeyboard(OnKeyboardProc);
// TODO: Perform any application-level initialization here
// Initialize DXUT and create the desired Win32 window and Direct3D device for the application
DXUTInit( true, true ); // Parse the command line and show msgboxes
DXUTSetHotkeyHandling( true, true, true ); // handle the default hotkeys
DXUTSetCursorSettings( true, true ); // Show the cursor and clip it when in full screen
DXUTCreateWindow( L"chap13_text_dx9" );
DXUTCreateDevice( true, 640, 480 );
// Start the render loop
DXUTMainLoop();
// TODO: Perform any application-level cleanup here
return DXUTGetExitCode();
}
运行结果如下:
