mirror of
https://github.com/encounter/SDL.git
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95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
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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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#ifndef __WINRT__
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#include "SDL_hid.h"
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HidD_GetString_t SDL_HidD_GetManufacturerString;
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HidD_GetString_t SDL_HidD_GetProductString;
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HidD_GetPreparsedData_t SDL_HidD_GetPreparsedData;
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HidD_FreePreparsedData_t SDL_HidD_FreePreparsedData;
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HidP_GetCaps_t SDL_HidP_GetCaps;
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HidP_GetButtonCaps_t SDL_HidP_GetButtonCaps;
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HidP_GetValueCaps_t SDL_HidP_GetValueCaps;
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HidP_MaxDataListLength_t SDL_HidP_MaxDataListLength;
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HidP_GetData_t SDL_HidP_GetData;
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static HMODULE s_pHIDDLL = 0;
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static int s_HIDDLLRefCount = 0;
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int
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WIN_LoadHIDDLL(void)
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{
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if (s_pHIDDLL) {
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SDL_assert(s_HIDDLLRefCount > 0);
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s_HIDDLLRefCount++;
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return 0; /* already loaded */
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}
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s_pHIDDLL = LoadLibrary(TEXT("hid.dll"));
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if (!s_pHIDDLL) {
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return -1;
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}
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SDL_assert(s_HIDDLLRefCount == 0);
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s_HIDDLLRefCount = 1;
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SDL_HidD_GetManufacturerString = (HidD_GetString_t)GetProcAddress(s_pHIDDLL, "HidD_GetManufacturerString");
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SDL_HidD_GetProductString = (HidD_GetString_t)GetProcAddress(s_pHIDDLL, "HidD_GetProductString");
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SDL_HidD_GetPreparsedData = (HidD_GetPreparsedData_t)GetProcAddress(s_pHIDDLL, "HidD_GetPreparsedData");
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SDL_HidD_FreePreparsedData = (HidD_FreePreparsedData_t)GetProcAddress(s_pHIDDLL, "HidD_FreePreparsedData");
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SDL_HidP_GetCaps = (HidP_GetCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetCaps");
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SDL_HidP_GetButtonCaps = (HidP_GetButtonCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetButtonCaps");
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SDL_HidP_GetValueCaps = (HidP_GetValueCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetValueCaps");
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SDL_HidP_MaxDataListLength = (HidP_MaxDataListLength_t)GetProcAddress(s_pHIDDLL, "HidP_MaxDataListLength");
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SDL_HidP_GetData = (HidP_GetData_t)GetProcAddress(s_pHIDDLL, "HidP_GetData");
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if (!SDL_HidD_GetManufacturerString || !SDL_HidD_GetProductString || !SDL_HidD_GetPreparsedData ||
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!SDL_HidD_FreePreparsedData || !SDL_HidP_GetCaps || !SDL_HidP_GetButtonCaps ||
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!SDL_HidP_GetValueCaps || !SDL_HidP_MaxDataListLength || !SDL_HidP_GetData) {
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WIN_UnloadHIDDLL();
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return -1;
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}
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return 0;
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}
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void
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WIN_UnloadHIDDLL(void)
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{
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if (s_pHIDDLL) {
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SDL_assert(s_HIDDLLRefCount > 0);
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if (--s_HIDDLLRefCount == 0) {
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FreeLibrary(s_pHIDDLL);
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s_pHIDDLL = NULL;
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}
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} else {
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SDL_assert(s_HIDDLLRefCount == 0);
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}
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}
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#endif /* !__WINRT__ */
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/* vi: set ts=4 sw=4 expandtab: */
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