static bool grabFrameD3D11(IDXGISwapChain *swap) { ID3D11Device *device = 0; ID3D11DeviceContext *context = 0; ID3D11Texture2D *tex = 0, *captureTex = 0; if (FAILED(swap->GetBuffer(0, IID_ID3D11Texture2D, (void**)&tex))) return false; D3D11_TEXTURE2D_DESC desc; tex->GetDevice(&device); tex->GetDesc(&desc); // re-creating the capture staging texture each frame is definitely not the most efficient // way to handle things, but it frees me of all kind of resource management trouble, so // here goes... desc.MipLevels = 1; desc.ArraySize = 1; desc.SampleDesc.Count = 1; desc.SampleDesc.Quality = 0; desc.Usage = D3D11_USAGE_STAGING; desc.BindFlags = 0; desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ; desc.MiscFlags = 0; if(FAILED(device->CreateTexture2D(&desc,0,&captureTex))) printLog("video/d3d11: couldn't create staging texture for gpu->cpu download!\n"); else setCaptureResolution(desc.Width,desc.Height); device->GetImmediateContext(&context); context->CopySubresourceRegion(captureTex,0,0,0,0,tex,0,0); D3D11_MAPPED_SUBRESOURCE mapped; bool grabOk = false; if(captureTex && SUCCEEDED(context->Map(captureTex,0,D3D11_MAP_READ,0,&mapped))) { switch(desc.Format) { case DXGI_FORMAT_R8G8B8A8_UNORM: blitAndFlipRGBAToCaptureData((unsigned char *) mapped.pData,mapped.RowPitch); grabOk = true; break; default: printLog("video/d3d11: unsupported backbuffer format, can't grab pixels!\n"); break; } context->Unmap(captureTex,0); } tex->Release(); if(captureTex) captureTex->Release(); context->Release(); device->Release(); return grabOk; }