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

If I want to create a D3D surface I do it like below. Similiarly if I want to create an array of D3D surfaces of type IDirect3DSurface9* how do I do in C++ ?

如果我想创建一个D3D曲面，我就像下面这样做。类似地，如果我想创建一个类型为IDirect3DSurface9的D3D曲面数组*在c++中该怎么做?

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 :: How do I create an array of D3D device in C++ ?

查询:如何在c++中创建D3D设备数组?

1 个解决方案

#1

ppdxsurface is not declared correctly, you need to provide pointer to pointer object, not just pointer to pointer. It shall be IDirect3DSurface9*, not IDirect3DSurface9**:

ppdxsurface没有正确声明，您需要提供指向指针对象的指针，而不仅仅是指向指针的指针。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);

To create array of surfaces just call it in loop:

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);
}

Or using std::vector if you prefer dynamic arrays:

或者使用std::vector如果你喜欢动态数组:

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);
}

#1