如何在C++中创建IDirect3DSurface9(D3D曲面)曲面数组？

Question

如果我想创建一个D3D表面,我会像下面这样做.同样,如果我想创建一个IDirect3DSurface9类型的D3D表面数组*我该怎么做C++？

IDirect3DSurface9** ppdxsurface = NULL;
IDirect3DDevice9 * pdxDevice = getdevice(); // getdevice is a custom function which gives me //the d3d device. 

pdxDevice->CreateOffscreenPlainSurface(720,480,
                                                D3DFMT_A8R8G8B8,
                                                D3DPOOL_DEFAULT,
                                                pdxsurface,
                                                NULL);

QUERY ::如何在C++中创建D3D设备数组？

Answer 1

ppdxsurface未正确声明,您需要提供指针对象的指针,而不仅仅是指向指针的指针.应该是IDirect3DSurface9*,而不是IDirect3DSurface9**:

IDirect3DSurface9* pdxsurface = NULL;
IDirect3DDevice9* pdxDevice = getdevice();

pdxDevice->CreateOffscreenPlainSurface(720, 480,
   D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT,
   &pdxsurface, // Pass pointer to pointer
   NULL);

// Usage:
HDC hDC = NULL;
pdxsurface->GetDC(hDC);

要创建曲面数组,只需在循环中调用它:

// Define array of 10 surfaces
const int maxSurfaces = 10;
IDirect3DSurface9* pdxsurface[maxSurfaces] = { 0 };

for(int i = 0; i < maxSurfaces; ++i)
{
   pdxDevice->CreateOffscreenPlainSurface(720, 480,
      D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT,
      &pdxsurface[i],
      NULL);
}

或者std::vector如果您更喜欢使用动态数组:

std::vector<IDirect3DSurface9*> surfVec;

for(int i = 0; i < maxSurfaces; ++i)
{
   IDirect3DSurface9* pdxsurface = NULL;
   pdxDevice->CreateOffscreenPlainSurface(720, 480,
      D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT,
      &pdxsurface,
      NULL);
   surfVec.push_back(pdxsurface);
}