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Atmosphere/libraries/libstratosphere/source/hid/hid_api.cpp

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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
namespace ams::hid {
#if defined(ATMOSPHERE_OS_HORIZON)
namespace {
/* Global lock. */
constinit os::SdkMutex g_hid_lock;
constinit bool g_initialized_hid = false;
/* Set of supported NpadIds (we want to read from any connected controllers). */
constexpr const HidNpadIdType NpadIdTypes[] = {
HidNpadIdType_No1,
HidNpadIdType_No2,
HidNpadIdType_No3,
HidNpadIdType_No4,
HidNpadIdType_No5,
HidNpadIdType_No6,
HidNpadIdType_No7,
HidNpadIdType_No8,
HidNpadIdType_Handheld,
};
constexpr const size_t NumNpadIdTypes = util::size(NpadIdTypes);
/* Helper. */
void InitializeHid() {
R_ABORT_UNLESS(sm::Initialize());
R_ABORT_UNLESS(hidInitialize());
hidInitializeNpad();
R_ABORT_UNLESS(hidSetSupportedNpadIdType(NpadIdTypes, NumNpadIdTypes));
R_ABORT_UNLESS(hidSetSupportedNpadStyleSet(HidNpadStyleSet_NpadStandard | HidNpadStyleTag_NpadSystemExt));
}
Result EnsureHidInitialized() {
if (!g_initialized_hid) {
if (!serviceIsActive(hidGetServiceSession())) {
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if (!pm::info::HasLaunchedBootProgram(ncm::SystemProgramId::Hid)) {
return MAKERESULT(Module_Libnx, LibnxError_InitFail_HID);
}
InitializeHid();
}
g_initialized_hid = true;
}
return ResultSuccess();
}
u64 ReadHidNpad(HidNpadIdType id) {
HidNpadSystemExtState state;
size_t count = hidGetNpadStatesSystemExt(id, std::addressof(state), 1);
if (count != 0 && (state.attributes & HidNpadAttribute_IsConnected)) {
return state.buttons;
}
return 0;
}
}
Result GetKeysHeld(u64 *out) {
std::scoped_lock lk(g_hid_lock);
R_TRY(EnsureHidInitialized());
*out = ReadHidNpad(HidNpadIdType_Handheld);
for (size_t controller = 0; controller < 8; controller++) {
*out |= ReadHidNpad(static_cast<HidNpadIdType>(controller));
}
return ResultSuccess();
}
#endif
}