Atlas - SDL_gameinput.cpp
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23#ifdef HAVE_GAMEINPUT_H
24
25#include "SDL_windows.h"
26#include "SDL_gameinput.h"
27
28static SDL_SharedObject *g_hGameInputDLL;
29static IGameInput *g_pGameInput;
30static int g_nGameInputRefCount;
31
32
33bool SDL_InitGameInput(IGameInput **ppGameInput)
34{
35    if (g_nGameInputRefCount == 0) {
36        g_hGameInputDLL = SDL_LoadObject("gameinput.dll");
37        if (!g_hGameInputDLL) {
38            return false;
39        }
40
41        typedef HRESULT (WINAPI *pfnGameInputCreate)(IGameInput **gameInput);
42        pfnGameInputCreate pGameInputCreate = (pfnGameInputCreate)SDL_LoadFunction(g_hGameInputDLL, "GameInputCreate");
43        if (!pGameInputCreate) {
44            SDL_UnloadObject(g_hGameInputDLL);
45            return false;
46        }
47
48        IGameInput *pGameInput = NULL;
49        HRESULT hr = pGameInputCreate(&pGameInput);
50        if (FAILED(hr)) {
51            SDL_UnloadObject(g_hGameInputDLL);
52            return WIN_SetErrorFromHRESULT("GameInputCreate failed", hr);
53        }
54
55#ifdef SDL_PLATFORM_WIN32
56#if GAMEINPUT_API_VERSION >= 1
57        hr = pGameInput->QueryInterface(IID_IGameInput, (void **)&g_pGameInput);
58#else
59        // We require GameInput v1.1 or newer
60        hr = E_NOINTERFACE;
61#endif
62        pGameInput->Release();
63        if (FAILED(hr)) {
64            SDL_UnloadObject(g_hGameInputDLL);
65            return WIN_SetErrorFromHRESULT("GameInput QueryInterface failed", hr);
66        }
67#else
68        // Assume that the version we get is compatible with the current SDK
69        g_pGameInput = pGameInput;
70#endif
71    }
72    ++g_nGameInputRefCount;
73
74    if (ppGameInput) {
75        *ppGameInput = g_pGameInput;
76    }
77    return true;
78}
79
80void SDL_QuitGameInput(void)
81{
82    SDL_assert(g_nGameInputRefCount > 0);
83
84    --g_nGameInputRefCount;
85    if (g_nGameInputRefCount == 0) {
86        if (g_pGameInput) {
87            g_pGameInput->Release();
88            g_pGameInput = NULL;
89        }
90        if (g_hGameInputDLL) {
91            SDL_UnloadObject(g_hGameInputDLL);
92            g_hGameInputDLL = NULL;
93        }
94    }
95}
96
97#endif // HAVE_GAMEINPUT_H
98
[FILE END]
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