我使用了一段使用直接绘制的遗留代码,我处于相当尴尬的境地。不久前,我更新了系统,不得不适应新情况(加载 ddraw.dll),一切正常。今天我探索了另一个遗留解决方案,它也使用了我已经更改的类(文件),但我遇到了上面提到的链接错误。我检查并比较了项目属性,它们接缝很好。
这是directX初始化的代码,“麻烦”的代码是粗体的。
typedef int (__stdcall *DirectDrawCreateFunc)(GUID FAR* a ,LPDIRECTDRAW FAR* b, IUnknown FAR* c);
/* init_directx:
* Low-level DirectDraw initialization routine.
*/
int CDCUtils::init_directx(HWND allegro_wnd)
{
LPDIRECTDRAW directdraw1;
HRESULT hr;
LPVOID temp;
HINSTANCE ddraw = LoadLibrary("%WINDIR%\system32\ddraw.dll");
if(ddraw== NULL)
{
return -1;
}
_ddrawLib =ddraw;
DirectDrawCreateFunc ddFunc = (DirectDrawCreateFunc)GetProcAddress(ddraw,"DirectDrawCreate");
if(ddFunc)
{
/* first we have to set up the DirectDraw1 interface... */
hr = ddFunc(NULL, &directdraw1, NULL);
if (FAILED(hr))
return -1;
}
///* first we have to set up the DirectDraw1 interface... */
//hr = DirectDrawCreate(NULL, &directdraw1, NULL);
//if (FAILED(hr))
// return -1;
//...then query the DirectDraw2 interface
//This is the only place where IID_IDirectDraw2 is mentioned in entire solution
hr=directdraw1->QueryInterface(IID_IDirectDraw2, &temp);
if (FAILED(hr))
return -1;
_directdraw = (LPDIRECTDRAW2)temp;
directdraw1->Release();
/* set the default cooperation level */
hr = IDirectDraw2_SetCooperativeLevel(_directdraw, allegro_wnd, DDSCL_NORMAL);
if (FAILED(hr))
return -1;
/* get capabilities */
_ddcaps.dwSize = sizeof(_ddcaps);
hr = IDirectDraw2_GetCaps(_directdraw, &_ddcaps, NULL);
if (FAILED(hr)) {
TRACE("Can't get driver caps\n");
return -1;
}
_dxHwnd=allegro_wnd;
return 0;
}
有任何想法吗?为什么它适用于一种解决方案而不适用于这个解决方案?哦链接器我讨厌你。