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

Question

如果要创建D3D曲面，请按照以下步骤进行操作。 如果想创建IDirect3DSurface9 *类型的D3D曲面数组，该如何在C ++中实现？

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声明不正确，您需要提供指向指针对象的指针 ，而不仅仅是指针的指针。 它应该是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);

要创建表面数组，只需在循环中调用它即可：

// 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);
}

或使用std::vector如果您更喜欢动态数组）：

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);
}