我在 VS 2010 中设置 DirectX 9（与问题无关。我认为）框架时遇到了一个非常令人沮丧的问题。这是我的 DirectX 框架：
#ifndef _DX9_H_
#define _DX9_H_
// window includes
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
// required for ush typedef and window properties to setup backbuffer
#include "sys_params.h"
// directx9 includes
#define DIRECTINPUT_VERSION 0x0800
#include <d3dx9.h>
#include <dinput.h>
#include <DxErr.h>
#include <vector>
#include <iterator>
// directx9 libraries
#pragma comment(lib, "d3d9.lib")
#pragma comment(lib, "d3dx9.lib")
#pragma comment(lib, "dinput8.lib")
#pragma comment(lib, "dxguid.lib")
#pragma comment(lib, "dxerr.lib")
namespace nsdx9
{
using nssysprms::ush;
#define CheckHR(hr) CheckForDXError(__FILE__, __LINE__, hr)
class DX9
{
public:
DX9(HINSTANCE& inst, int cmdShow, const std::string& title, ush wndwidth, ush wndheight, short wndx, short wndy);
~DX9();
// windows message processor
UINT ProcessMessages();
// --- DIRECTX GAME FUNCTIONS --- //
// input functions
void InputUpdate();
BYTE KeyHeld(ush key);
bool KeyPressed(ush key);
// sprite functions
const LPD3DXSPRITE& GetSpriteInterface();
void SpriteBeginDraw(DWORD flags = D3DXSPRITE_ALPHABLEND);
void SpriteEndDraw();
// font functions
void MakeFont(int height, int width, UINT weight = FW_DONTCARE, LPCSTR face = "Calibri", bool italic = false);
const LPD3DXFONT& GetFontAtIndex(ush index);
const std::vector<LPD3DXFONT>& GetFontVector();
// --- END DIRECTX GAME FUNCTIONS --- //
private:
// --- WINDOW FUNCTIONS/VARIABLES --- //
WNDCLASSEX _wc;
HWND _hwnd;
MSG _msg;
HINSTANCE _inst;
std::string _title;
static LRESULT CALLBACK WinProc(HWND hwnd, UINT msg, WPARAM wprm, LPARAM lprm);
// --- END WINDOW FUNCTIONS/VARIABLES --- //
// --- DIRECTX FUNCTIONS/VARIABLES --- //
// D3D interfaces
LPDIRECT3D9 _d3d;
LPDIRECT3DDEVICE9 _d3ddev;
D3DPRESENT_PARAMETERS _d3dpp;
// directinput interfaces
LPDIRECTINPUT8 _dInput;
LPDIRECTINPUTDEVICE8 _diMouse;
LPDIRECTINPUTDEVICE8 _diKeyboard;
DIMOUSESTATE _mouseState;
BYTE _keys[256];
bool _keyStates[256];
bool _keyboardStateChanged;
void AcquireInputDevice(const LPDIRECTINPUTDEVICE8& dev);
// sprite interfaces
LPD3DXSPRITE _spriteBatch;
// font vector
std::vector<LPD3DXFONT> _fonts;
// hresult checker, for debugging only
void CheckForDXError(const char *file, int line, HRESULT hr);
// --- END DIRECTX FUNCTIONS/VARIABLES --- //
};
/*=================================================*/
/*--------------DIRECTX CONSTRUCTOR----------------*/
/*=================================================*/
DX9::DX9(HINSTANCE& inst, int cmdShow, const std::string& title, ush wndwidth, ush wndheight, short wndx, short wndy)
{
/*=================================================*/
/*--------------WINDOW INITIALIZATION--------------*/
/*=================================================*/
_title = title;
_inst = inst;
// init window class struct
_wc.cbClsExtra = NULL;
_wc.cbSize = sizeof(WNDCLASSEX);
_wc.cbWndExtra = NULL;
_wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
_wc.hCursor = LoadCursor(NULL, IDC_ARROW);
_wc.hIcon = NULL;
_wc.hIconSm = NULL;
_wc.hInstance = inst;
_wc.lpfnWndProc = (WNDPROC)WinProc;
_wc.lpszClassName = title.c_str();
_wc.lpszMenuName = NULL;
_wc.style = CS_HREDRAW | CS_VREDRAW;
RegisterClassEx(&_wc);
// create handle to the window
_hwnd = CreateWindow(title.c_str(),
title.c_str(),
WS_OVERLAPPEDWINDOW,
wndx,
wndy,
wndwidth,
wndheight,
NULL,
NULL,
inst,
NULL);
// required to make the window show up
ShowWindow(_hwnd, cmdShow);
UpdateWindow(_hwnd);
/*=================================================*/
/*--------------END WINDOW INITIALIZATION----------*/
/*=================================================*/
/*=================================================*/
/*--------------DIRECTX INITIALIZATION-------------*/
/*=================================================*/
// --- INITIALIZE DIRECTX9 VARIABLES --- //
SecureZeroMemory(&_d3dpp, sizeof(_d3dpp));
SecureZeroMemory(&_mouseState, sizeof(_mouseState));
SecureZeroMemory(&_keys, sizeof(_keys));
for (int i = 0; i < 256; i++)
{
_keyStates[i] = true;
}
_d3d = NULL;
_d3ddev = NULL;
_dInput = NULL;
_diMouse = NULL;
_diKeyboard = NULL;
_keyboardStateChanged = false;
_spriteBatch = NULL;
// --- END INITIALIZE DIRECTX9 VARIABLES --- //
// --- DIRECTX9 INITIALIZATION --- //
_d3d = Direct3DCreate9(D3D_SDK_VERSION);
if (!_d3d)
{
OutputDebugString("Error: Failed to create Direct3D.\n");
}
// set d3d present parameters
_d3dpp.AutoDepthStencilFormat = D3DFMT_D24S8;
_d3dpp.BackBufferCount = 1;
_d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8;
_d3dpp.BackBufferHeight = nssysprms::WND_HEIGHT;
_d3dpp.BackBufferWidth = nssysprms::WND_WIDTH;
_d3dpp.EnableAutoDepthStencil = 1;
_d3dpp.Flags = D3DPRESENTFLAG_DISCARD_DEPTHSTENCIL;
//_d3dpp.FullScreen_RefreshRateInHz
_d3dpp.hDeviceWindow = _hwnd;
//_d3dpp.MultiSampleQuality
//_d3dpp.MultiSampleType
_d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_DEFAULT;
_d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
_d3dpp.Windowed = nssysprms::isWindowed;
// create d3d device
CheckHR(_d3d->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, _hwnd, D3DCREATE_MIXED_VERTEXPROCESSING, &_d3dpp, &_d3ddev));
// --- END DIRECTX9 INITIALIZATION --- //
// --- INITIALIZE DIRECTINPUT --- //
CheckHR(DirectInput8Create(inst, DIRECTINPUT_VERSION, IID_IDirectInput8, (void**)&_dInput, NULL));
// create mouse and keyboard
CheckHR(_dInput->CreateDevice(GUID_SysKeyboard, &_diKeyboard, NULL));
CheckHR(_dInput->CreateDevice(GUID_SysMouse, &_diMouse, NULL));
// initialize keyboard
CheckHR(_diKeyboard->SetDataFormat(&c_dfDIKeyboard));
CheckHR(_diKeyboard->SetCooperativeLevel(_hwnd, DISCL_NONEXCLUSIVE | DISCL_FOREGROUND));
AcquireInputDevice(_diKeyboard);
// initialize mouse
CheckHR(_diMouse->SetDataFormat(&c_dfDIMouse));
CheckHR(_diMouse->SetCooperativeLevel(_hwnd, DISCL_NONEXCLUSIVE | DISCL_FOREGROUND));
AcquireInputDevice(_diMouse);
// create sprite object
CheckHR(D3DXCreateSprite(_d3ddev, &_spriteBatch));
// --- END INITIALIZE DIRECTINPUT --- //
/*=================================================*/
/*--------------END DIRECTX INITIALIZATION---------*/
/*=================================================*/
}
/*=================================================*/
/*--------------END DIRECTX CONSTRUCTOR------------*/
/*=================================================*/
/*=================================================*/
/*--------------DIRECTX DESTRUCTOR-----------------*/
/*=================================================*/
DX9::~DX9()
{
// set all stack variables to NULL
SecureZeroMemory(&_d3dpp, sizeof(_d3dpp));
SecureZeroMemory(&_mouseState, sizeof(_mouseState));
SecureZeroMemory(&_keys, sizeof(_keys));
SecureZeroMemory(&_keyStates, sizeof(_keyStates));
// free all the D3D interfaces from memory
if (!_fonts.empty())
{
for (std::vector<LPD3DXFONT>::iterator it = _fonts.begin(); it != _fonts.end(); it++)
{
// SOLVEPROBLEM figure out why this doesn't work
//*it->OnLostDevice();
}
_fonts.erase(_fonts.begin(), _fonts.end() - 1);
}
if (_spriteBatch != NULL)
{
_spriteBatch->Release();
_spriteBatch = NULL;
}
if (_diKeyboard != NULL)
{
_diKeyboard->Release();
_diKeyboard = NULL;
}
if (_diMouse != NULL)
{
_diMouse->Release();
_diMouse = NULL;
}
if (_d3ddev != NULL)
{
_d3ddev->Release();
_d3ddev = NULL;
}
if (_d3d != NULL)
{
_d3d->Release();
_d3d = NULL;
}
// free the window class from memory
UnregisterClass(_title.c_str(), _inst);
}
/*=================================================*/
/*--------------END DIRECTX DESTRUCTOR-------------*/
/*=================================================*/
/*=================================================*/
/*--------------HRESULT ERROR CHECK----------------*/
/*=================================================*/
void DX9::CheckForDXError(const char *file, int line, HRESULT hr)
{
if (SUCCEEDED(hr))
{
return;
}
// Get the direct X error and description
char desc[1024];
sprintf_s(desc,"(DX) %s - %s", DXGetErrorString(hr), DXGetErrorDescription(hr));
// Output the file and line number in the correct format + the above DX error
char buf[2048];
sprintf_s(buf,"%s(%d) : Error: %s\n", file, line, desc);
OutputDebugString(buf);
}
/*=================================================*/
/*--------------END HRESULT ERROR CHECK------------*/
/*=================================================*/
/*=================================================*/
/*--------------MESSAGE PROCESSOR------------------*/
/*=================================================*/
UINT DX9::ProcessMessages()
{
if (PeekMessage(&_msg, NULL, NULL, NULL, PM_REMOVE))
{
TranslateMessage(&_msg);
DispatchMessage(&_msg);
}
return _msg.message;
}
/*=================================================*/
/*--------------END MESSAGE PROCESSOR--------------*/
/*=================================================*/
/*=================================================*/
/*--------------MESSAGE HANDLER--------------------*/
/*=================================================*/
LRESULT CALLBACK DX9::WinProc(HWND hwnd, UINT msg, WPARAM wprm, LPARAM lprm)
{
switch (msg)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
}
return DefWindowProc(hwnd, msg, wprm, lprm);
}
/*=================================================*/
/*--------------END MESSAGE HANDLER----------------*/
/*=================================================*/
/*=================================================*/
/*--------------DIRECTINPUT FUNCTIONS--------------*/
/*=================================================*/
// for init only, helper function to initially acquire the
// mouse and keyboard
void DX9::AcquireInputDevice(const LPDIRECTINPUTDEVICE8& dev)
{
// loop and attempt to acquire the device until success
while (FAILED(dev->Acquire()))
{
dev->Acquire();
}
}
// update the state of the mouse and keyboard
void DX9::InputUpdate()
{
_diKeyboard->GetDeviceState(sizeof(_keys), (LPVOID)_keys);
_diMouse->GetDeviceState(sizeof(_mouseState), (LPVOID)&_mouseState);
// after directinput has been updated, check to see if any keys are no,
// longer pressed, and reset the keystate array at that key's index if,
// this is the case
// keystates true = key is available for key press
if (_keyboardStateChanged)
{
for (int i = 0; i < 256; i++)
{
if (!KeyHeld(i))
{
_keyStates[i] = true;
}
}
}
_keyboardStateChanged = false;
}
// captures a key being held down
BYTE DX9::KeyHeld(ush key)
{
return _keys[key] & 0x80;
}
// captures a single key press
bool DX9::KeyPressed(ush key)
{
if (KeyHeld(key) && _keyStates[key])
{
_keyStates[key] = false;
return true;
}
else
{
if (!KeyHeld(key) && !_keyStates[key])
{
_keyboardStateChanged = true;
}
return false;
}
}
/*=================================================*/
/*--------------END DIRECTINPUT FUNCTIONS----------*/
/*=================================================*/
/*=================================================*/
/*--------------SPRITE FUNCTIONS-------------------*/
/*=================================================*/
// returns the sprite interface
const LPD3DXSPRITE& DX9::GetSpriteInterface()
{
return _spriteBatch;
}
// begin drawing with the sprite batch
void DX9::SpriteBeginDraw(DWORD flags)
{
_spriteBatch->Begin(flags);
}
// end sprite batch drawing
void DX9::SpriteEndDraw()
{
_spriteBatch->End();
}
/*=================================================*/
/*--------------END SPRITE FUNCTIONS---------------*/
/*=================================================*/
/*=================================================*/
/*--------------FONT FUNCTIONS---------------------*/
/*=================================================*/
// create a font
void DX9::MakeFont(int height, int width, UINT weight, LPCSTR face, bool italic)
{
LPD3DXFONT newfont;
CheckHR(D3DXCreateFont(_d3ddev,
height,
width,
weight,
0,
italic,
DEFAULT_CHARSET,
OUT_DEFAULT_PRECIS,
CLEARTYPE_QUALITY,
DEFAULT_PITCH | FF_DONTCARE,
face,
&newfont));
_fonts.push_back(newfont);
}
// gets a font at the specified index
const LPD3DXFONT& DX9::GetFontAtIndex(ush index)
{
return _fonts[index];
}
const std::vector<LPD3DXFONT>& DX9::GetFontVector()
{
return _fonts;
}
/*=================================================*/
/*--------------END FONT FUNCTIONS-----------------*/
/*=================================================*/
}
#endif
除了创建和初始化一个窗口、DirectX 和一些基本的 DirectX 函数之外，这实际上并没有做任何事情。
实际的错误是这样的：
Error 1 error LNK2005: "public: __thiscall nsdx9::DX9::DX9(struct HINSTANCE__ * &,int,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,unsigned short,unsigned short,short,short)" (??0DX9@nsdx9@@QAE@AAPAUHINSTANCE__@@HABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@GGFF@Z) already defined in game_manager.obj C:\Users\JAREK\documents\visual studio 2010\Projects\example\example\main.obj
dx9.h 中的每个函数都会重复此错误。如果我只在 main.cpp 中包含 dx9.h，我不会收到此错误。只有当我在任何其他 cpp 文件中包含 dx9.h，或者在可以访问 dx9.h 的 cpp 文件中使用 dx9.h 中的任何参数时，我才能得到这个错误。这听起来令人困惑，所以这里有一些来自程序其他部分的示例：
主.cpp：
#include "sys_params.h"
#include "dx9.h"
#include "game_manager.h"
int WINAPI WinMain (HINSTANCE inst, HINSTANCE pinst, LPSTR cmdLine, int cmdShow)
{
// state of the program
bool appEnd = false;
// create and initialize the window and directx9
nsdx9::DX9* _dx9 = new nsdx9::DX9(inst, cmdShow, nssysprms::GAME_TITLE,
nssysprms::WND_WIDTH, nssysprms::WND_HEIGHT,
nssysprms::WND_POS_X, nssysprms::WND_POS_Y);
// create and initialize the game manager
Game_Manager* _mngr = new Game_Manager(_dx9);
// Windows message handler
// also the entry point for the main game loop
while (_dx9->ProcessMessages() != WM_QUIT && !appEnd)
{
if (!_mngr->Game_Run())
{
appEnd = true;
}
}
// clean up everything
delete _mngr;
delete _dx9;
return 0;
}
游戏管理器.h：
#ifndef _GAME_MANAGER_H_
#define _GAME_MANAGER_H_
#include <stack>
#include <vector>
#include "dx9.h"
#include "screen.h"
#include "message_handler.h"
class Game_Manager
{
public:
Game_Manager(nsdx9::DX9* dx9);
~Game_Manager();
bool Game_Run();
private:
nsdx9::DX9* _dx9;
std::stack<Screen*> _screens;
Message_Handler* _msg_hnd;
// *** DECLARE SCREENS HERE *** //
void InitFonts();
void InitScreens();
};
#endif
这应该是真正导致问题的原因。问题源自 main.cpp 到 game_manager.h。我尝试过的任何方法都没有为我解决问题。我在 dx9.h 中包含了标题保护，所以我不知道是什么原因造成的。如果你们需要更多信息，请告诉我。谢谢！