| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org> |
| |
| 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" |
| |
| #include "SDL_assert.h" |
| #include "SDL_xinput.h" |
| |
| |
| #ifdef HAVE_XINPUT_H |
| |
| XInputGetState_t SDL_XInputGetState = NULL; |
| XInputSetState_t SDL_XInputSetState = NULL; |
| XInputGetCapabilities_t SDL_XInputGetCapabilities = NULL; |
| XInputGetBatteryInformation_t SDL_XInputGetBatteryInformation = NULL; |
| DWORD SDL_XInputVersion = 0; |
| |
| static HANDLE s_pXInputDLL = 0; |
| static int s_XInputDLLRefCount = 0; |
| |
| |
| #ifdef __WINRT__ |
| |
| int |
| WIN_LoadXInputDLL(void) |
| { |
| /* Getting handles to system dlls (via LoadLibrary and its variants) is not |
| * supported on WinRT, thus, pointers to XInput's functions can't be |
| * retrieved via GetProcAddress. |
| * |
| * When on WinRT, assume that XInput is already loaded, and directly map |
| * its XInput.h-declared functions to the SDL_XInput* set of function |
| * pointers. |
| * |
| * Side-note: XInputGetStateEx is not available for use in WinRT. |
| * This seems to mean that support for the guide button is not available |
| * in WinRT, unfortunately. |
| */ |
| SDL_XInputGetState = (XInputGetState_t)XInputGetState; |
| SDL_XInputSetState = (XInputSetState_t)XInputSetState; |
| SDL_XInputGetCapabilities = (XInputGetCapabilities_t)XInputGetCapabilities; |
| SDL_XInputGetBatteryInformation = (XInputGetBatteryInformation_t)XInputGetBatteryInformation; |
| |
| /* XInput 1.4 ships with Windows 8 and 8.1: */ |
| SDL_XInputVersion = (1 << 16) | 4; |
| |
| return 0; |
| } |
| |
| void |
| WIN_UnloadXInputDLL(void) |
| { |
| } |
| |
| #else /* !__WINRT__ */ |
| |
| int |
| WIN_LoadXInputDLL(void) |
| { |
| DWORD version = 0; |
| |
| if (s_pXInputDLL) { |
| SDL_assert(s_XInputDLLRefCount > 0); |
| s_XInputDLLRefCount++; |
| return 0; /* already loaded */ |
| } |
| |
| version = (1 << 16) | 4; |
| s_pXInputDLL = LoadLibrary(L"XInput1_4.dll"); /* 1.4 Ships with Windows 8. */ |
| if (!s_pXInputDLL) { |
| version = (1 << 16) | 3; |
| s_pXInputDLL = LoadLibrary(L"XInput1_3.dll"); /* 1.3 can be installed as a redistributable component. */ |
| } |
| if (!s_pXInputDLL) { |
| s_pXInputDLL = LoadLibrary(L"bin\\XInput1_3.dll"); |
| } |
| if (!s_pXInputDLL) { |
| /* "9.1.0" Ships with Vista and Win7, and is more limited than 1.3+ (e.g. XInputGetStateEx is not available.) */ |
| s_pXInputDLL = LoadLibrary(L"XInput9_1_0.dll"); |
| } |
| if (!s_pXInputDLL) { |
| return -1; |
| } |
| |
| SDL_assert(s_XInputDLLRefCount == 0); |
| SDL_XInputVersion = version; |
| s_XInputDLLRefCount = 1; |
| |
| /* 100 is the ordinal for _XInputGetStateEx, which returns the same struct as XinputGetState, but with extra data in wButtons for the guide button, we think... */ |
| SDL_XInputGetState = (XInputGetState_t)GetProcAddress((HMODULE)s_pXInputDLL, (LPCSTR)100); |
| if (!SDL_XInputGetState) { |
| SDL_XInputGetState = (XInputGetState_t)GetProcAddress((HMODULE)s_pXInputDLL, "XInputGetState"); |
| } |
| SDL_XInputSetState = (XInputSetState_t)GetProcAddress((HMODULE)s_pXInputDLL, "XInputSetState"); |
| SDL_XInputGetCapabilities = (XInputGetCapabilities_t)GetProcAddress((HMODULE)s_pXInputDLL, "XInputGetCapabilities"); |
| SDL_XInputGetBatteryInformation = (XInputGetBatteryInformation_t)GetProcAddress( (HMODULE)s_pXInputDLL, "XInputGetBatteryInformation" ); |
| if (!SDL_XInputGetState || !SDL_XInputSetState || !SDL_XInputGetCapabilities) { |
| WIN_UnloadXInputDLL(); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void |
| WIN_UnloadXInputDLL(void) |
| { |
| if (s_pXInputDLL) { |
| SDL_assert(s_XInputDLLRefCount > 0); |
| if (--s_XInputDLLRefCount == 0) { |
| FreeLibrary(s_pXInputDLL); |
| s_pXInputDLL = NULL; |
| } |
| } else { |
| SDL_assert(s_XInputDLLRefCount == 0); |
| } |
| } |
| |
| #endif /* __WINRT__ */ |
| #endif /* HAVE_XINPUT_H */ |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |