/*

Simple DirectMedia Layer

This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not

claim that you wrote the original software. If you use this software

in a product, an acknowledgment in the product documentation would be

appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be

misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

*/

#include "../../SDL_internal.h"

#if SDL_VIDEO_DRIVER_WINRT

/* Windows includes */

#include <roapi.h>

#include <windows.foundation.h>

#include <EventToken.h>

/* SDL includes */

extern "C" {

#include "SDL_mouse.h"

#include "../SDL_sysvideo.h"

}

#include "SDL_winrtvideo_cpp.h"

/* Game Bar events can come in off the main thread. Use the following

WinRT CoreDispatcher to deal with them on SDL's thread.

*/

static Platform::WeakReference WINRT_MainThreadDispatcher;

/* Win10's initial SDK (the 10.0.10240.0 release) does not include references

to Game Bar APIs, as the Game Bar was released via Win10 10.0.10586.0.

Declare its WinRT/COM interface here, to allow compilation with earlier

Windows SDKs.

*/

MIDL_INTERFACE("1DB9A292-CC78-4173-BE45-B61E67283EA7")

IGameBarStatics_ : public IInspectable

{

public:

virtual HRESULT STDMETHODCALLTYPE add_VisibilityChanged(

__FIEventHandler_1_IInspectable *handler,

Windows::Foundation::EventRegistrationToken *token) = 0;

virtual HRESULT STDMETHODCALLTYPE remove_VisibilityChanged(

Windows::Foundation::EventRegistrationToken token) = 0;

virtual HRESULT STDMETHODCALLTYPE add_IsInputRedirectedChanged(

__FIEventHandler_1_IInspectable *handler,

Windows::Foundation::EventRegistrationToken *token) = 0;

virtual HRESULT STDMETHODCALLTYPE remove_IsInputRedirectedChanged(

Windows::Foundation::EventRegistrationToken token) = 0;

virtual HRESULT STDMETHODCALLTYPE get_Visible(

boolean *value) = 0;

virtual HRESULT STDMETHODCALLTYPE get_IsInputRedirected(

boolean *value) = 0;

};

/* Declare the game bar's COM GUID */

static GUID IID_IGameBarStatics_ = { MAKELONG(0xA292, 0x1DB9), 0xCC78, 0x4173, { 0xBE, 0x45, 0xB6, 0x1E, 0x67, 0x28, 0x3E, 0xA7 } };

/* Retrieves a pointer to the game bar, or NULL if it is not available.

If a pointer is returned, it's ->Release() method must be called

after the caller has finished using it.

*/

static IGameBarStatics_ *

WINRT_GetGameBar()

{

wchar_t *wClassName = L"Windows.Gaming.UI.GameBar";

HSTRING hClassName;

IActivationFactory *pActivationFactory = NULL;

IGameBarStatics_ *pGameBar = NULL;

HRESULT hr;

hr = ::WindowsCreateString(wClassName, (UINT32)wcslen(wClassName), &hClassName);

if (FAILED(hr)) {

goto done;

}

hr = Windows::Foundation::GetActivationFactory(hClassName, &pActivationFactory);

if (FAILED(hr)) {

goto done;

}

pActivationFactory->QueryInterface(IID_IGameBarStatics_, (void **) &pGameBar);

done:

if (pActivationFactory) {

pActivationFactory->Release();

}

if (hClassName) {

::WindowsDeleteString(hClassName);

}

return pGameBar;

}

static void

WINRT_HandleGameBarIsInputRedirected_MainThread()

{

IGameBarStatics_ *gameBar;

boolean isInputRedirected = 0;

if (!WINRT_MainThreadDispatcher) {

/* The game bar event handler has been deregistered! */

return;

}

gameBar = WINRT_GetGameBar();

if (!gameBar) {

/* Shouldn't happen, but just in case... */

return;

}

if (SUCCEEDED(gameBar->get_IsInputRedirected(&isInputRedirected))) {

if ( ! isInputRedirected) {

/* Input-control is now back to the SDL app. Restore the cursor,

in case Windows does not (it does not in either Win10

10.0.10240.0 or 10.0.10586.0, maybe later version(s) too.

*/

SDL_Cursor *cursor = SDL_GetCursor();

SDL_SetCursor(cursor);

}

}

gameBar->Release();

}

static void

WINRT_HandleGameBarIsInputRedirected_NonMainThread(Platform::Object ^ o1, Platform::Object ^o2)

{

Windows::UI::Core::CoreDispatcher ^dispatcher = WINRT_MainThreadDispatcher.Resolve<Windows::UI::Core::CoreDispatcher>();

if (dispatcher) {

dispatcher->RunAsync(

Windows::UI::Core::CoreDispatcherPriority::Normal,

ref new Windows::UI::Core::DispatchedHandler(&WINRT_HandleGameBarIsInputRedirected_MainThread));

}

}

void

WINRT_InitGameBar(_THIS)

{

SDL_VideoData *driverdata = (SDL_VideoData *)_this->driverdata;

IGameBarStatics_ *gameBar = WINRT_GetGameBar();

if (gameBar) {

/* GameBar.IsInputRedirected events can come in via something other than

the main/SDL thread.

Get a WinRT 'CoreDispatcher' that can be used to call back into the

SDL thread.

*/

WINRT_MainThreadDispatcher = Windows::UI::Core::CoreWindow::GetForCurrentThread()->Dispatcher;

Windows::Foundation::EventHandler<Platform::Object ^> ^handler = \

ref new Windows::Foundation::EventHandler<Platform::Object ^>(&WINRT_HandleGameBarIsInputRedirected_NonMainThread);

__FIEventHandler_1_IInspectable * pHandler = reinterpret_cast<__FIEventHandler_1_IInspectable *>(handler);

gameBar->add_IsInputRedirectedChanged(pHandler, &driverdata->gameBarIsInputRedirectedToken);

gameBar->Release();

}

}

void

WINRT_QuitGameBar(_THIS)

{

SDL_VideoData *driverdata;

IGameBarStatics_ *gameBar;

if (!_this || !_this->driverdata) {

return;

}

gameBar = WINRT_GetGameBar();

if (!gameBar) {

return;

}

driverdata = (SDL_VideoData *)_this->driverdata;

if (driverdata->gameBarIsInputRedirectedToken.Value) {

gameBar->remove_IsInputRedirectedChanged(driverdata->gameBarIsInputRedirectedToken);

driverdata->gameBarIsInputRedirectedToken.Value = 0;

}

WINRT_MainThreadDispatcher = nullptr;

gameBar->Release();

}

#endif /* SDL_VIDEO_DRIVER_WINRT */

/* vi: set ts=4 sw=4 expandtab: */