| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "device/gamepad/hid_dll_functions_win.h" |
| |
| #include "base/files/file_path.h" |
| |
| namespace device { |
| |
| HidDllFunctionsWin::HidDllFunctionsWin() |
| : hid_dll_( |
| base::LoadNativeLibrary(base::FilePath(FILE_PATH_LITERAL("hid.dll")), |
| nullptr)) { |
| if (hid_dll_.is_valid()) { |
| hidp_get_caps_ = reinterpret_cast<HidPGetCapsFunc>( |
| hid_dll_.GetFunctionPointer("HidP_GetCaps")); |
| hidp_get_button_caps_ = reinterpret_cast<HidPGetButtonCapsFunc>( |
| hid_dll_.GetFunctionPointer("HidP_GetButtonCaps")); |
| hidp_get_value_caps_ = reinterpret_cast<HidPGetValueCapsFunc>( |
| hid_dll_.GetFunctionPointer("HidP_GetValueCaps")); |
| hidp_get_usages_ex_ = reinterpret_cast<HidPGetUsagesExFunc>( |
| hid_dll_.GetFunctionPointer("HidP_GetUsagesEx")); |
| hidp_get_usage_value_ = reinterpret_cast<HidPGetUsageValueFunc>( |
| hid_dll_.GetFunctionPointer("HidP_GetUsageValue")); |
| hidp_get_scaled_usage_value_ = |
| reinterpret_cast<HidPGetScaledUsageValueFunc>( |
| hid_dll_.GetFunctionPointer("HidP_GetScaledUsageValue")); |
| hidd_get_product_string_ = reinterpret_cast<HidDGetStringFunc>( |
| hid_dll_.GetFunctionPointer("HidD_GetProductString")); |
| } |
| |
| is_valid_ = hidp_get_caps_ != nullptr && hidp_get_button_caps_ != nullptr && |
| hidp_get_value_caps_ != nullptr && |
| hidp_get_usages_ex_ != nullptr && |
| hidp_get_usage_value_ != nullptr && |
| hidp_get_scaled_usage_value_ != nullptr && |
| hidd_get_product_string_ != nullptr; |
| } |
| |
| } // namespace device |
