How can I change the DisplayMode at runtime using Direct3D9?

By using the IDirect3DDevice9::Reset() call you can change your DisplayMode at runtime. You can also use this call to recreate your lost device.

Reset() takes a D3DPRESENT_PARAMETERS structure, just like Create Device(), which specifies the desired resolution and presentation settings. If you're restoring a lost device then you can use the same D3DPRESENT_PARAMETERS as when you called CreateDevice() ; You can get D3DPRESENT_PARAMETERS structure from Direct3D (First get a pointer to the swap chain through IDirect3DDevice9::GetSwapChain() , and then use IDirect3DSwapChain9::GetPresentParameters()). However, before Resetting a device: you have to release all D3DPOOL_DEFAULT resources, and then recreate them after calling Reset(). You're also not guaranteed to keep any of your device states (renderstates, texturestates, etc).

FAQ Menu

 

Advertisement

Free Magazine