Add basic mouse-to-touchpad emulation (#3842)

src/common/config.cpp

@@ -1310,6 +1310,7 @@ hotkey_pause = f9
 hotkey_reload_inputs = f8
 hotkey_toggle_mouse_to_joystick = f7
 hotkey_toggle_mouse_to_gyro = f6
+hotkey_toggle_mouse_to_touchpad = delete
 hotkey_quit = lctrl, lshift, end
 )";
 }

src/input/input_handler.cpp

@@ -106,6 +106,7 @@ auto output_array = std::array{
     ControllerOutput(HOTKEY_RELOAD_INPUTS),
     ControllerOutput(HOTKEY_TOGGLE_MOUSE_TO_JOYSTICK),
     ControllerOutput(HOTKEY_TOGGLE_MOUSE_TO_GYRO),
+    ControllerOutput(HOTKEY_TOGGLE_MOUSE_TO_TOUCHPAD),
     ControllerOutput(HOTKEY_RENDERDOC),
 
     ControllerOutput(SDL_GAMEPAD_BUTTON_INVALID, SDL_GAMEPAD_AXIS_INVALID),
@@ -579,6 +580,9 @@ void ControllerOutput::FinalizeUpdate() {
         case HOTKEY_TOGGLE_MOUSE_TO_GYRO:
             PushSDLEvent(SDL_EVENT_MOUSE_TO_GYRO);
             break;
+        case HOTKEY_TOGGLE_MOUSE_TO_TOUCHPAD:
+            PushSDLEvent(SDL_EVENT_MOUSE_TO_TOUCHPAD);
+            break;
         case HOTKEY_RENDERDOC:
             PushSDLEvent(SDL_EVENT_RDOC_CAPTURE);
             break;

src/input/input_handler.h

@@ -34,9 +34,10 @@
 #define SDL_EVENT_RELOAD_INPUTS SDL_EVENT_USER + 5
 #define SDL_EVENT_MOUSE_TO_JOYSTICK SDL_EVENT_USER + 6
 #define SDL_EVENT_MOUSE_TO_GYRO SDL_EVENT_USER + 7
-#define SDL_EVENT_RDOC_CAPTURE SDL_EVENT_USER + 8
-#define SDL_EVENT_QUIT_DIALOG SDL_EVENT_USER + 9
-#define SDL_EVENT_MOUSE_WHEEL_OFF SDL_EVENT_USER + 10
+#define SDL_EVENT_MOUSE_TO_TOUCHPAD SDL_EVENT_USER + 8
+#define SDL_EVENT_RDOC_CAPTURE SDL_EVENT_USER + 9
+#define SDL_EVENT_QUIT_DIALOG SDL_EVENT_USER + 10
+#define SDL_EVENT_MOUSE_WHEEL_OFF SDL_EVENT_USER + 11
 
 #define LEFTJOYSTICK_HALFMODE 0x00010000
 #define RIGHTJOYSTICK_HALFMODE 0x00020000
@@ -52,7 +53,8 @@
 #define HOTKEY_RELOAD_INPUTS 0xf0000005
 #define HOTKEY_TOGGLE_MOUSE_TO_JOYSTICK 0xf0000006
 #define HOTKEY_TOGGLE_MOUSE_TO_GYRO 0xf0000007
-#define HOTKEY_RENDERDOC 0xf0000008
+#define HOTKEY_TOGGLE_MOUSE_TO_TOUCHPAD 0xf0000008
+#define HOTKEY_RENDERDOC 0xf0000009
 
 #define SDL_UNMAPPED UINT32_MAX - 1
 
@@ -141,6 +143,7 @@ const std::map<std::string, u32> string_to_cbutton_map = {
     {"hotkey_reload_inputs", HOTKEY_RELOAD_INPUTS},
     {"hotkey_toggle_mouse_to_joystick", HOTKEY_TOGGLE_MOUSE_TO_JOYSTICK},
     {"hotkey_toggle_mouse_to_gyro", HOTKEY_TOGGLE_MOUSE_TO_GYRO},
+    {"hotkey_toggle_mouse_to_touchpad", HOTKEY_TOGGLE_MOUSE_TO_TOUCHPAD},
     {"hotkey_renderdoc_capture", HOTKEY_RENDERDOC},
 };
 

src/input/input_mouse.cpp

@@ -8,8 +8,12 @@
 #include "input/controller.h"
 #include "input_mouse.h"
 
+#include <common/singleton.h>
+#include <emulator.h>
 #include "SDL3/SDL.h"
 
+extern Frontend::WindowSDL* g_window;
+
 namespace Input {
 
 int mouse_joystick_binding = 0;
@@ -80,7 +84,6 @@ void EmulateJoystick(GameController* controller, u32 interval) {
 
 constexpr float constant_down_accel[3] = {0.0f, 10.0f, 0.0f};
 void EmulateGyro(GameController* controller, u32 interval) {
-    // LOG_INFO(Input, "todo gyro");
     float d_x = 0, d_y = 0;
     SDL_GetRelativeMouseState(&d_x, &d_y);
     controller->Acceleration(1, constant_down_accel);
@@ -92,6 +95,16 @@ void EmulateGyro(GameController* controller, u32 interval) {
     controller->Gyro(1, gyro_from_mouse);
 }
 
+void EmulateTouchpad(GameController* controller, u32 interval) {
+    float x, y;
+    SDL_MouseButtonFlags mouse_buttons = SDL_GetMouseState(&x, &y);
+    controller->SetTouchpadState(0, (mouse_buttons & SDL_BUTTON_LMASK) != 0,
+                                 std::clamp(x / g_window->GetWidth(), 0.0f, 1.0f),
+                                 std::clamp(y / g_window->GetHeight(), 0.0f, 1.0f));
+    controller->CheckButton(0, Libraries::Pad::OrbisPadButtonDataOffset::TouchPad,
+                            (mouse_buttons & SDL_BUTTON_RMASK) != 0);
+}
+
 Uint32 MousePolling(void* param, Uint32 id, Uint32 interval) {
     auto* controller = (GameController*)param;
     switch (mouse_mode) {
@@ -101,6 +114,9 @@ Uint32 MousePolling(void* param, Uint32 id, Uint32 interval) {
     case MouseMode::Gyro:
         EmulateGyro(controller, interval);
         break;
+    case MouseMode::Touchpad:
+        EmulateTouchpad(controller, interval);
+        break;
 
     default:
         break;

src/input/input_mouse.h

@@ -12,6 +12,7 @@ enum MouseMode {
     Off = 0,
     Joystick,
     Gyro,
+    Touchpad,
 };
 
 bool ToggleMouseModeTo(MouseMode m);

src/sdl_window.cpp

@@ -457,6 +457,11 @@ void WindowSDL::WaitEvent() {
         SDL_SetWindowRelativeMouseMode(this->GetSDLWindow(),
                                        Input::ToggleMouseModeTo(Input::MouseMode::Gyro));
         break;
+    case SDL_EVENT_MOUSE_TO_TOUCHPAD:
+        SDL_SetWindowRelativeMouseMode(this->GetSDLWindow(),
+                                       Input::ToggleMouseModeTo(Input::MouseMode::Touchpad));
+        SDL_SetWindowRelativeMouseMode(this->GetSDLWindow(), false);
+        break;
     case SDL_EVENT_RDOC_CAPTURE:
         VideoCore::TriggerCapture();
         break;