图形图像处理

开发平台：
Visual C++

InputSystem.cpp：源码内容
							#include "stdafx.h"
#include "InputSystem.h"
//DX输入系统
CKeyboard::CKeyboard(LPDIRECTINPUT8 pDI, HWND hwnd)
{ FAILED(pDI->CreateDevice(GUID_SysKeyboard, &m_pDIDev, NULL));
  FAILED(m_pDIDev->SetDataFormat(&c_dfDIKeyboard));
  FAILED(m_pDIDev->SetCooperativeLevel(hwnd, DISCL_FOREGROUND | DISCL_NONEXCLUSIVE));
  FAILED(m_pDIDev->Acquire());
  Clear();
}
CKeyboard::~CKeyboard()
{ if (m_pDIDev)
  { m_pDIDev->Unacquire();
    m_pDIDev->Release();
  }
}
bool CKeyboard::Acquire()
{ Clear();
  return (!FAILED(m_pDIDev->Acquire()));
}
bool CKeyboard::Unacquire()
{ Clear();
  return (!FAILED(m_pDIDev->Unacquire()));
}
bool CKeyboard::Update()
{ if (FAILED(m_pDIDev->GetDeviceState(sizeof(m_keys), (LPVOID)m_keys)))
  { if (FAILED(m_pDIDev->Acquire())) return false;
    if (FAILED(m_pDIDev->GetDeviceState(sizeof(m_keys), (LPVOID)m_keys)))  return false;
  }
  return true;
}
CMouse::CMouse(LPDIRECTINPUT8 pDI, HWND hwnd, bool isExclusive)
{ FAILED(pDI->CreateDevice(GUID_SysMouse, &m_pDIDev, NULL));
  FAILED(m_pDIDev->SetDataFormat(&c_dfDIMouse));
  DWORD flags;
  if (isExclusive)
    flags = DISCL_FOREGROUND | DISCL_EXCLUSIVE | DISCL_NOWINKEY;
  else
    flags = DISCL_FOREGROUND | DISCL_NONEXCLUSIVE;
  FAILED(m_pDIDev->SetCooperativeLevel(hwnd, flags));
  FAILED(m_pDIDev->Acquire());
  FAILED(m_pDIDev->GetDeviceState(sizeof(DIMOUSESTATE), &m_state));
}
bool CMouse::Update()
{ if (FAILED(m_pDIDev->GetDeviceState(sizeof(DIMOUSESTATE), &m_state)))
  { if (FAILED(m_pDIDev->Acquire()))  return false;
    if (FAILED(m_pDIDev->GetDeviceState(sizeof(DIMOUSESTATE), &m_state)))  return false;
  }
  return true;
}
CMouse::~CMouse()
{ if (m_pDIDev)
  { m_pDIDev->Unacquire();
    m_pDIDev->Release();
  }
}
bool CMouse::Acquire()
{  return (!FAILED(m_pDIDev->Acquire()));
}
bool CMouse::Unacquire()
{  return (!FAILED(m_pDIDev->Unacquire()));
}
CJoystick::CJoystick(LPDIRECTINPUT8 pDI, HINSTANCE appInstance)
{}
CJoystick::~CJoystick()
{ if (m_pDIDev)
  { m_pDIDev->Unacquire();
    m_pDIDev->Release();
  }
}
bool CInputSystem::Initialize(HWND hwnd, HINSTANCE appInstance, bool isExclusive, DWORD flags)
{ m_pKeyboard = NULL; 
  m_pMouse = NULL; 
  m_pJoystick = NULL; 
  if (FAILED(DirectInput8Create(appInstance,
                               DIRECTINPUT_VERSION,
                               IID_IDirectInput8,
                               (void **)&m_pDI,
                               NULL)))
    return false;
  if (flags & IS_USEKEYBOARD)
  {  m_pKeyboard = new CKeyboard(m_pDI, hwnd);
  }
  if (flags & IS_USEMOUSE)
  {  m_pMouse = new CMouse(m_pDI, hwnd, true);
  }
  if (flags & IS_USEJOYSTICK)
  {  m_pJoystick = new CJoystick(m_pDI, appInstance);
  }
  return true;
}
bool CInputSystem::Shutdown()
{ UnacquireAll();
  if (m_pKeyboard)
  { delete m_pKeyboard;
    m_pKeyboard = NULL;
  }
  if (m_pMouse)
  { delete m_pMouse;
    m_pMouse = NULL;
  }
  if (m_pJoystick)
  { delete m_pJoystick;
    m_pJoystick = NULL;
  }
  if (FAILED(m_pDI->Release()))  return false;
  return true;
}
bool CInputSystem::Update()
{ if (m_pKeyboard)  m_pKeyboard->Update();
  if (m_pMouse)		m_pMouse->Update();
  if (m_pJoystick)  m_pJoystick->Update();
  return true;
}
void CInputSystem::AcquireAll()
{ if (m_pKeyboard)  m_pKeyboard->Acquire();
  if (m_pMouse)		m_pMouse->Acquire();
  if (m_pJoystick)  m_pJoystick->Acquire();
}
void CInputSystem::UnacquireAll()
{ if (m_pKeyboard)  m_pKeyboard->Unacquire();
  if (m_pMouse)		m_pMouse->Unacquire();
  if (m_pJoystick)  m_pJoystick->Unacquire();
}
bool CJoystick::Acquire()
{  return (!FAILED(m_pDIDev->Acquire()));
}
bool CJoystick::Unacquire()
{  return (!FAILED(m_pDIDev->Unacquire()));
}
bool CJoystick::Update()
{  return true;
}

						