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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstring>
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/settings.h"
#include "core/core_timing.h"
#include "core/frontend/emu_window.h"
#include "core/frontend/input.h"
#include "core/hle/service/hid/controllers/touchscreen.h"
namespace Service::HID {
constexpr std::size_t SHARED_MEMORY_OFFSET = 0x400;
Controller_Touchscreen::Controller_Touchscreen(Core::System& system) : ControllerBase(system) {}
Controller_Touchscreen::~Controller_Touchscreen() = default;
void Controller_Touchscreen::OnInit() {
for (std::size_t id = 0; id < MAX_FINGERS; ++id) {
mouse_finger_id[id] = MAX_FINGERS;
keyboard_finger_id[id] = MAX_FINGERS;
udp_finger_id[id] = MAX_FINGERS;
}
}
void Controller_Touchscreen::OnRelease() {}
void Controller_Touchscreen::OnUpdate(const Core::Timing::CoreTiming& core_timing, u8* data,
std::size_t size) {
shared_memory.header.timestamp = core_timing.GetCPUTicks();
shared_memory.header.total_entry_count = 17;
if (!IsControllerActivated()) {
shared_memory.header.entry_count = 0;
shared_memory.header.last_entry_index = 0;
return;
}
shared_memory.header.entry_count = 16;
const auto& last_entry =
shared_memory.shared_memory_entries[shared_memory.header.last_entry_index];
shared_memory.header.last_entry_index = (shared_memory.header.last_entry_index + 1) % 17;
auto& cur_entry = shared_memory.shared_memory_entries[shared_memory.header.last_entry_index];
cur_entry.sampling_number = last_entry.sampling_number + 1;
cur_entry.sampling_number2 = cur_entry.sampling_number;
const Input::TouchStatus& mouse_status = touch_mouse_device->GetStatus();
const Input::TouchStatus& udp_status = touch_udp_device->GetStatus();
for (std::size_t id = 0; id < mouse_status.size(); ++id) {
mouse_finger_id[id] = UpdateTouchInputEvent(mouse_status[id], mouse_finger_id[id]);
udp_finger_id[id] = UpdateTouchInputEvent(udp_status[id], udp_finger_id[id]);
}
if (Settings::values.use_touch_from_button) {
const Input::TouchStatus& keyboard_status = touch_btn_device->GetStatus();
for (std::size_t id = 0; id < mouse_status.size(); ++id) {
keyboard_finger_id[id] =
UpdateTouchInputEvent(keyboard_status[id], keyboard_finger_id[id]);
}
}
std::array<Finger, 16> active_fingers;
const auto end_iter = std::copy_if(fingers.begin(), fingers.end(), active_fingers.begin(),
[](const auto& finger) { return finger.pressed; });
const auto active_fingers_count =
static_cast<std::size_t>(std::distance(active_fingers.begin(), end_iter));
const u64 tick = core_timing.GetCPUTicks();
cur_entry.entry_count = static_cast<s32_le>(active_fingers_count);
for (std::size_t id = 0; id < MAX_FINGERS; ++id) {
auto& touch_entry = cur_entry.states[id];
if (id < active_fingers_count) {
touch_entry.x = static_cast<u16>(active_fingers[id].x * Layout::ScreenUndocked::Width);
touch_entry.y = static_cast<u16>(active_fingers[id].y * Layout::ScreenUndocked::Height);
touch_entry.diameter_x = Settings::values.touchscreen.diameter_x;
touch_entry.diameter_y = Settings::values.touchscreen.diameter_y;
touch_entry.rotation_angle = Settings::values.touchscreen.rotation_angle;
touch_entry.delta_time = tick - active_fingers[id].last_touch;
fingers[active_fingers[id].id].last_touch = tick;
touch_entry.finger = active_fingers[id].id;
touch_entry.attribute.raw = active_fingers[id].attribute.raw;
} else {
// Clear touch entry
touch_entry.attribute.raw = 0;
touch_entry.x = 0;
touch_entry.y = 0;
touch_entry.diameter_x = 0;
touch_entry.diameter_y = 0;
touch_entry.rotation_angle = 0;
touch_entry.delta_time = 0;
touch_entry.finger = 0;
}
}
std::memcpy(data + SHARED_MEMORY_OFFSET, &shared_memory, sizeof(TouchScreenSharedMemory));
}
void Controller_Touchscreen::OnLoadInputDevices() {
touch_mouse_device = Input::CreateDevice<Input::TouchDevice>("engine:emu_window");
touch_udp_device = Input::CreateDevice<Input::TouchDevice>("engine:cemuhookudp");
touch_btn_device = Input::CreateDevice<Input::TouchDevice>("engine:touch_from_button");
}
std::optional<std::size_t> Controller_Touchscreen::GetUnusedFingerID() const {
// Dont assign any touch input to a finger if disabled
if (!Settings::values.touchscreen.enabled) {
return std::nullopt;
}
std::size_t first_free_id = 0;
while (first_free_id < MAX_FINGERS) {
if (!fingers[first_free_id].pressed) {
return first_free_id;
} else {
first_free_id++;
}
}
return std::nullopt;
}
std::size_t Controller_Touchscreen::UpdateTouchInputEvent(
const std::tuple<float, float, bool>& touch_input, std::size_t finger_id) {
const auto& [x, y, pressed] = touch_input;
if (finger_id > MAX_FINGERS) {
LOG_ERROR(Service_HID, "Invalid finger id {}", finger_id);
return MAX_FINGERS;
}
if (pressed) {
Attributes attribute{};
if (finger_id == MAX_FINGERS) {
const auto first_free_id = GetUnusedFingerID();
if (!first_free_id) {
// Invalid finger id do nothing
return MAX_FINGERS;
}
finger_id = first_free_id.value();
fingers[finger_id].pressed = true;
fingers[finger_id].id = static_cast<u32_le>(finger_id);
attribute.start_touch.Assign(1);
}
fingers[finger_id].x = x;
fingers[finger_id].y = y;
fingers[finger_id].attribute = attribute;
return finger_id;
}
if (finger_id != MAX_FINGERS) {
if (!fingers[finger_id].attribute.end_touch) {
fingers[finger_id].attribute.end_touch.Assign(1);
fingers[finger_id].attribute.start_touch.Assign(0);
return finger_id;
}
fingers[finger_id].pressed = false;
}
return MAX_FINGERS;
}
} // namespace Service::HID
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