Thread: Restoring DirectX interface after alt+tab

You must recreate the device and reset the device. Then you must re-create all managed assets. If you have a texture manager or a resource manager that will load from disk if the resource is not loaded then this process is nearly automatic. As the game engine requests textures and meshes your resource system hands them out and eventually everything that is needed for the game is slowly built back up.

Code:

...
...
GetApp()->getDevice()->SetTexture(0,GetApp()->getResMgr()->getTexture(MAIN_CHARACTER_MODEL);
...
...

Now if getTexture() has code in it to load the texture from disk if it has not been loaded then all is well and you don't have to change any render code to handle lost devices. The only thing you have to do is write the code that actually catches the lost device condition and responds to it.

well I tried

Code:

switch(this->device->Present(0 , 0 , 0 , 0)){
   case D3DERR_DEVICELOST: // application lost focus, reset

      while(this->device->Reset(&this->d3d_parameters) == D3DERR_DEVICELOST) Sleep(0);
      this->device->Release();
      this->d3d->Release();
      this->d3d = Direct3DCreate9(D3D_SDK_VERSION);
      this->d3d->CreateDevice(D3DADAPTER_DEFAULT , D3DDEVTYPE_HAL , hwnd , this->VertexProcessingMethod , &this->d3d_parameters , &this->device);
      break;
  default:
      break;
}

which does retake the screen, but there seems to be a conflict, as i get flashing pieces of the desktop or other appications. Right now all my application
is doing is clearing the back buffer, there are no other resources created, I want to get the alt tab thing figured out before i start adding code to handle
the meshes etc, so that i can add that into the alt tab handlign code as well where appropriate.