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我有一個用於DX9的WDDM用戶模式顯示驅動程序。現在我想將 渲染目標的後臺緩衝區轉儲到bmp文件。由於渲染目標資源是 不可鎖定,因此我必須從系統緩衝區和bitblt將渲染目標渲染到系統緩衝區,然後將系統緩衝區保存到bmp 文件。但是,調用bitblt總是返回錯誤代碼E_FAIL。我也 試圖調用也返回相同的錯誤代碼的pfnCaptureToSysMem。 這裏有什麼問題嗎?嘗試複製渲染目標的後緩衝時返回錯誤
D3DDDI_SURFACEINFO nfo;
nfo.Depth = 0;
nfo.Width = GetRenderSize().cx;
nfo.Height = GetRenderSize().cy;
nfo.pSysMem = NULL;
nfo.SysMemPitch = 0;
nfo.SysMemSlicePitch = 0;
D3DDDIARG_CREATERESOURCE resource;
resource.Format = D3DDDIFMT_A8R8G8B8;
resource.Pool = D3DDDIPOOL_SYSTEMMEM;
resource.MultisampleType = D3DDDIMULTISAMPLE_NONE;
resource.MultisampleQuality = 0;
resource.pSurfList = &nfo;
resource.SurfCount = 1;
resource.MipLevels = 1;
resource.Fvf = 0;
resource.VidPnSourceId = 0;
resource.RefreshRate.Numerator = 0;
resource.RefreshRate.Denominator = 0;
resource.hResource = NULL;
resource.Flags.Value = 0;
resource.Flags.Texture = 1;
resource.Flags.Dynamic = 1;
resource.Rotation = D3DDDI_ROTATION_IDENTITY;
HRESULT hr = m_pDevice->m_deviceFuncs.pfnCreateResource(m_pDevice->GetDrv(), &resource);
HANDLE hSysSpace = resource.hResource;
D3DDDIARG_BLT blt;
blt.hSrcResource = m_pDevice->m_hRenderTarget;
blt.hDstResource = hSysSpace;
blt.SrcRect.left = 0;
blt.SrcRect.top = 0;
blt.SrcRect.right = GetRenderSize().cx;
blt.SrcRect.bottom = GetRenderSize().cy;
blt.DstRect = blt.SrcRect;
blt.DstSubResourceIndex = 0;
blt.SrcSubResourceIndex = 0;
blt.Flags.Value = 0;
blt.ColorKey = 0;
hr = m_pDevice->m_deviceFuncs.pfnBlt(m_pDevice, &blt);