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godotengine
GitHub Repository: godotengine/godot
 Path: blob/master/thirdparty/sdl/core/windows/SDL_gameinput.c
9905 views
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/*

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  Simple DirectMedia Layer

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  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>

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

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

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  arising from the use of this software.

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

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  including commercial applications, and to alter it and redistribute it

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  freely, subject to the following restrictions:

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

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

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

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     appreciated but is not required.

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

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     misrepresented as being the original software.

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

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*/

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#include "SDL_internal.h"

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#ifdef HAVE_GAMEINPUT_H

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#include "SDL_windows.h"

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#include "SDL_gameinput.h"

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#ifdef SDL_PLATFORM_WIN32

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#include <initguid.h>

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// {11BE2A7E-4254-445A-9C09-FFC40F006918}

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DEFINE_GUID(SDL_IID_GameInput, 0x11BE2A7E, 0x4254, 0x445A, 0x9C, 0x09, 0xFF, 0xC4, 0x0F, 0x00, 0x69, 0x18);

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#endif

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static SDL_SharedObject *g_hGameInputDLL;

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static IGameInput *g_pGameInput;

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static int g_nGameInputRefCount;

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bool SDL_InitGameInput(IGameInput **ppGameInput)

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{

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    if (g_nGameInputRefCount == 0) {

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        g_hGameInputDLL = SDL_LoadObject("gameinput.dll");

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        if (!g_hGameInputDLL) {

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            return false;

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        }

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        typedef HRESULT (WINAPI *GameInputCreate_t)(IGameInput * *gameInput);

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        GameInputCreate_t GameInputCreateFunc = (GameInputCreate_t)SDL_LoadFunction(g_hGameInputDLL, "GameInputCreate");

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        if (!GameInputCreateFunc) {

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            SDL_UnloadObject(g_hGameInputDLL);

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            return false;

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        }

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        IGameInput *pGameInput = NULL;

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        HRESULT hr = GameInputCreateFunc(&pGameInput);

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        if (FAILED(hr)) {

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            SDL_UnloadObject(g_hGameInputDLL);

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            return WIN_SetErrorFromHRESULT("GameInputCreate failed", hr);

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        }

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#ifdef SDL_PLATFORM_WIN32

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        hr = IGameInput_QueryInterface(pGameInput, &SDL_IID_GameInput, (void **)&g_pGameInput);

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        IGameInput_Release(pGameInput);

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        if (FAILED(hr)) {

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            SDL_UnloadObject(g_hGameInputDLL);

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            return WIN_SetErrorFromHRESULT("GameInput QueryInterface failed", hr);

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        }

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#else

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        // Assume that the version we get is compatible with the current SDK

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        // If that isn't the case, define the correct GUID for SDL_IID_GameInput above

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        g_pGameInput = pGameInput;

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#endif

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    }

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    ++g_nGameInputRefCount;

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    if (ppGameInput) {

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        *ppGameInput = g_pGameInput;

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    }

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    return true;

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}

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void SDL_QuitGameInput(void)

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{

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    SDL_assert(g_nGameInputRefCount > 0);

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    --g_nGameInputRefCount;

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    if (g_nGameInputRefCount == 0) {

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        if (g_pGameInput) {

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            IGameInput_Release(g_pGameInput);

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            g_pGameInput = NULL;

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        }

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        if (g_hGameInputDLL) {

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            SDL_UnloadObject(g_hGameInputDLL);

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            g_hGameInputDLL = NULL;

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        }

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    }

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}

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#endif // HAVE_GAMEINPUT_H

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