Raw input not working

[malhotraprateek]

I want to work with raw input (windows) and thought this library was a good fit for me. I tried to modify the listener example to use raw input but was not able to do so.

Steps to reproduce:

1. Build the project for x64 (I used VS2017 Community)

2. Change the following code snippet in listenersample.cpp: manager.CreateDevice<gainput::InputDeviceKeyboard>(gainput::InputDevice::DV_RAW); const gainput::DeviceId keyboardId = manager.CreateDevice<gainput::InputDeviceKeyboard>(); manager.CreateDevice<gainput::InputDeviceMouse>(gainput::InputDevice::DV_RAW); const gainput::DeviceId mouseId = manager.CreateDevice<gainput::InputDeviceMouse>(); manager.CreateDevice<gainput::InputDevicePad>(); manager.CreateDevice<gainput::InputDevicePad>(); manager.CreateDevice<gainput::InputDeviceTouch>(); to const gainput::DeviceId keyboardId = manager.CreateDevice<gainput::InputDeviceKeyboard>(gainput::InputDevice::AutoIndex, gainput::InputDevice::DV_RAW); //manager.CreateDevice<gainput::InputDeviceKeyboard>(); const gainput::DeviceId mouseId = manager.CreateDevice<gainput::InputDeviceMouse>(gainput::InputDevice::AutoIndex, gainput::InputDevice::DV_RAW); //manager.CreateDevice<gainput::InputDeviceMouse>(); //manager.CreateDevice<gainput::InputDevicePad>(); //manager.CreateDevice<gainput::InputDevicePad>(); //manager.CreateDevice<gainput::InputDeviceTouch>();

3. Run the sample project

4. Observe that there is no mouse input being reported

Potential solution:

I believe that the problem lies in how the library gets the raw input data in GainputInputDeviceMouseWinRaw.h and GainputInputDeviceKeyboardWinRaw.h

For x64 dwSize variable must be 48 instead of 40. A better way would be to get the size needed from the system itself.

Check the revisions of this gist.

NOTE: I have used C++ 11 features (shared_ptr) for my modifications.

Kindly let me know if you need anything more from my side

[kowalej]

@malhotraprateek are you trying to get all system input or only input within your application window?

[malhotraprateek]

@kowalej Hi, I was trying to create a Vulkan demo application. It think it was intended to be a windowed application and did not capture all system input. It has been sometime now, so I may not remember correctly.

[kowalej]

My purposes were capturing all input inside and outside the focused window but perhaps this may help you:

Set flags RIDEV_INPUTSINK | RIDEV_DEVNOTIFY and for hWnd give it the handle to your applications window.

Read more about the flags and such here: https://docs.microsoft.com/en-us/windows/desktop/api/winuser/ns-winuser-tagrawinputdevice

[malhotraprateek]

The issue I observed was that the lpb byte array was declared to have a size of 40 but the OS was returning 48 instead. I believe the correct size can be determined by calling GetRawInputData with nullptr for the third parameter and does not need to be hard-coded. (See references)

Does the size of input data buffer depend upon RIDEV_* flags?

References: MS Documentation This blog post This stack-overflow question has some more useful info.