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Member Since 24 Dec 2010
Offline Last Active May 27 2014 07:16 PM

Topics I've Started

asking a question about D3DPRESENT_PARAMETERS

12 May 2014 - 06:50 PM

hello everyone!i trouble with a question like the picture。


the right is render correct , the left is not  render  correct。


can anyone konw what's wrong?


the code:




       ZeroMemory( &d3dpp, sizeof(d3dpp) );

       d3dpp.Windowed         = TRUE;

       d3dpp.SwapEffect   =   D3DSWAPEFFECT_DISCARD;

       D3DDISPLAYMODE mode;        if(FAILED(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT , &mode)))  {           

              return 0;


       d3dpp.BackBufferFormat       = mode.Format;        

       d3dpp.hDeviceWindow          = (HWND)m_hWnd;                                  d3dpp.EnableAutoDepthStencil = TRUE;

       d3dpp.AutoDepthStencilFormat = D3DFMT_D16;


       if(g_pD3D->CheckDeviceMultiSampleType(D3DADAPTER_DEFAULT,  D3DDEVTYPE_HAL,



              d3dpp.MultiSampleType = D3DMULTISAMPLE_4_SAMPLES;




              d3dpp.MultiSampleType = D3DMULTISAMPLE_NONE;


         d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_DEFAULT;


       if(FAILED(s_pD3DDevice->CreateAdditionalSwapChain(&d3dpp, &m_pSwapChain)))


              return 0;




if i use d3dpp.MultiSampleType = D3DMULTISAMPLE_4_SAMPLES;  the picture render well be the left.

if i use d3dpp.MultiSampleType = D3DMULTISAMPLE_NONE; the picture render well be the right.


the render code:


IDirect3DSurface9 * pBackBuffer = NULL;  
   if (NULL != m_pSwapChain)
   m_pD3DDevice->SetRenderTarget(0 , pBackBuffer);



hr = m_pSwapChain->Present(NULL, NULL, (HWND)hWnd, NULL,0 );
  if (FAILED(hr))
   return 0;



how to set the line width

12 April 2014 - 12:58 AM

in d3d9's surface i draw lines use DrawPrimitive and D3DPT_LINELIST,because it is fact than gdi and ID3DXLine,but how to set the line width?

is anyone know? thanks.

why GDI is faster then ID3DXLine when drawing lines

09 April 2014 - 05:35 AM

hello everyone !  i use GDI and ID3DXLine to Draw lines in the D3Dsurface ,GDI

is not GPU accelerate,why faster then ID3DXLine? is anyone know why?

about reset and swanchain

15 January 2014 - 11:45 PM

hello,i have a problem.


how did reset function work to swapchain.


when i have one swapchain , i will reset the device when the window's size is changed.


but if i have two swapchain, each associate to one windows,and  just one window's size changed ,then i called reset ,will it work to another window?


is anyone know how to do ?

about SwapChains

15 January 2014 - 08:52 PM

hello,i have a problem.


i createdevice , then it will create  implicit swapchain, i call GetNumberOfSwapChains ,i get the num is  1, then i call CreateAdditionalSwapChain


then GetNumberOfSwapChains,i get the num also is 1.why it is not increase to  2??