Think of DX12 as “DirectX without training wheels, without brakes, and at the moment maybe without tires”. It will be more than a ‘few months’ for DirectX 12 to have a rich set of tutorials, support libraries, best practices, rock-solid drivers, and widely deployed support in the operating system on end-users machines. It’s “bleed edge” … Read more
It’s harder than it seems. If you want to use the encoder as you’re doing, by calling IMFTransform interface directly, you have to convert RGB frames to NV12. If you want good performance, you should do it on GPU. Possible to do with pixel shaders, render 2 frames, full size one into DXGI_FORMAT_R8_UNORM render target … Read more
You can try my example on hooking the Direct3D 9 API using C#. This utilizes EasyHook an open source .NET assembly that allows you to install hooks from managed code into unmanaged functions. SlimDX is also used – this is an open source managed wrapper around the Direct3D libraries. The tricky part of the hooking … Read more
According to http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf starting from 302 drivers it is enough to link statically with one of the following libraries: vcamp110.dll, vcamp110d.dll, nvapi.dll, nvapi64.dll, opencl.dll, nvcuda.dll, cudart*.*, or to export a NvOptimusEnablement variable in your program: extern “C” { _declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001; }
Assuming that you are talking about Windows, there are essentially three ways to do this. The first is to open the audio device’s main output as a recording source. This is only possible when the driver supports it, although most do these days. Common names for the virtual device are “What You Hear” or “Wave … Read more
If you’re actually good at writing unmanaged code, then you’ll probably be able to write a faster graphics engine on top of DirectX. However, for the hobbyist, XNA has plenty of performance, both for 2D and 3D game development. Here is a good Channel 9 video where they run an XNA-built racing game on Xbox … Read more
Note: These features (blur and the Backdrop brush) require the Anniversary Update to Windows 10. You currently can get a preview of the SDK through the Windows Insider Program Prerequisites Targeting the Windows 10 Anniversary Update A basic understanding of the Visual Layer and how the Visual Tree works. You can find out more here. … Read more
You install a system wide hook. (SetWindowsHookEx) With this done, you get to be loaded into every process. Now when the hook is called, you look for a loaded d3d9.dll. If one is loaded, you create a temporary D3D9 object, and walk the vtable to get the address of the EndScene method. Then you can … Read more
Well, here’s another example. Xfire is a chat program that overlays its interface into games so you can receive messages while playing. The way they do this is by editing the d3d/opengl DLL at the process memory level, like injecting assembly jumps. I know this because their method was causing my mod to crash, and … Read more
Have a look at Detours. Using Detours, you can instrument calls like Direct3DCreate9, IDirect3D9::CreateDevice and IDirect3D9::Present in which you perform the operations necessary to setup and then do a frame capture.