touch: restore wintouchemu, fall back to it when native touch hooks fail (#834)

## Link to GitHub Issue or related Pull Request, if one exists
Fixes #833

## Description of change
Last couple PRs - such as #820 #827 #828 - made the native touch hook &
touch injection using `InjectTouchInput` the default path, since it
performs much more reliably with both real touch screens and mouse (or
any other synthetic source).

However, user has reported that WINE lacks `InjectTouchInput` which
means this won't work.

As a fix, revive the old wintouchemu code. Native touch is still the
default, but under following circumstances:

1. if `-touchemuforce` is set, or
2. if any of the required Windows touch APIs are unavailable

then we fail over from native touch to wintouchemu code. 

For Linux, condition #2 would be hit during init, and gracefully switch
over.

Caveat: the poke code for IIDX and Nost will continue to require native
touch, I do not want to maintain two paths for this. This means that
iidx poke will stop working on Linux, unfortunately.

## Testing
Tested on Windows with `-touchemuforce` set. This is mostly reverting
Linux code path back to where we were last release, so this should just
work with wine.

src/spice2x/games/gitadora/gitadora.cpp

@@ -11,6 +11,7 @@
 #include "hooks/audio/audio.h"
 #include "hooks/audio/mme.h"
 #include "hooks/graphics/graphics.h"
+#include "misc/wintouchemu.h"
 #include "overlay/overlay.h"
 #include "touch/native/nativetouchhook.h"
 #include "util/cpuutils.h"
@@ -653,7 +654,13 @@ namespace games::gitadora {
             // monitor/touch hooks (windowed or full screen)
             if (GRAPHICS_PREVENT_SECONDARY_WINDOWS) {
                 // enable touch hook for subscreen overlay
+                const auto native_touch_ready = !wintouchemu::FORCE &&
                     nativetouch::hook(avs::game::DLL_INSTANCE);
+                if (!native_touch_ready) {
+                    wintouchemu::FORCE = true;
+                    wintouchemu::INJECT_MOUSE_AS_WM_TOUCH = true;
+                    wintouchemu::hook("GITADORA", avs::game::DLL_INSTANCE);
+                }
 
 #if !SPICE_XP
 

src/spice2x/games/iidx/iidx.cpp

@@ -22,6 +22,7 @@
 #include "touch/touch.h"
 #include "touch/native/nativetouchhook.h"
 #include "misc/eamuse.h"
+#include "misc/wintouchemu.h"
 #include "util/detour.h"
 #include "util/deferlog.h"
 #include "util/fileutils.h"
@@ -40,6 +41,7 @@
 #include "bi2x_hook.h"
 #include "ezusb.h"
 #include "io.h"
+#include "poke.h"
 
 static decltype(RegCloseKey) *RegCloseKey_orig = nullptr;
 static decltype(RegEnumKeyA) *RegEnumKeyA_orig = nullptr;
@@ -62,6 +64,8 @@ namespace games::iidx {
     bool TDJ_MODE = false;
     bool FORCE_720P = false;
     bool DISABLE_ESPEC_IO = false;
+    bool NATIVE_TOUCH = true;
+    bool ENABLE_POKE = false;
     std::optional<std::string> SOUND_OUTPUT_DEVICE = std::nullopt;
     std::optional<std::string> SOUND_OUTPUT_DEVICE_IN_EFFECT = std::nullopt;
     std::optional<std::string> ASIO_DRIVER = std::nullopt;
@@ -348,7 +352,16 @@ namespace games::iidx {
                 // need to hook `avs2-core.dll` so AVS win32fs operations go through rom hook
                 devicehook_init(avs::core::DLL_INSTANCE);
 
+                NATIVE_TOUCH = !wintouchemu::FORCE &&
                     nativetouch::hook(avs::game::DLL_INSTANCE);
+                if (!NATIVE_TOUCH) {
+                    wintouchemu::FORCE = true;
+                    wintouchemu::INJECT_MOUSE_AS_WM_TOUCH = true;
+                    wintouchemu::hook_title_ends(
+                        "beatmania IIDX",
+                        "main",
+                        avs::game::DLL_INSTANCE);
+                }
             }
 
             // insert BI2X hooks
@@ -525,6 +538,12 @@ namespace games::iidx {
         }
     }
 
+    void IIDXGame::post_attach() {
+        if (ENABLE_POKE) {
+            poke::enable();
+        }
+    }
+
     void IIDXGame::detach() {
         Game::detach();
 

src/spice2x/games/iidx/iidx.h

@@ -28,6 +28,8 @@ namespace games::iidx {
     extern bool TDJ_MODE;
     extern bool FORCE_720P;
     extern bool DISABLE_ESPEC_IO;
+    extern bool NATIVE_TOUCH;
+    extern bool ENABLE_POKE;
     extern std::optional<std::string> SOUND_OUTPUT_DEVICE;
     extern std::optional<std::string> ASIO_DRIVER;
     extern uint8_t DIGITAL_TT_SENS;
@@ -52,6 +54,7 @@ namespace games::iidx {
 
         virtual void attach() override;
         virtual void pre_attach() override;
+        virtual void post_attach() override;
         virtual void detach() override;
 
     private:

src/spice2x/games/iidx/poke.cpp

@@ -4,6 +4,7 @@
 
 #include "windows.h"
 #include "games/io.h"
+#include "games/iidx/iidx.h"
 #include "hooks/graphics/graphics.h"
 #include "launcher/shutdown.h"
 #include "misc/eamuse.h"
@@ -116,6 +117,11 @@ namespace games::iidx::poke {
         if (THREAD)
             return;
 
+        if (!games::iidx::NATIVE_TOUCH) {
+            log_warning("poke", "keypad touch emulation requires native touch; disabled");
+            return;
+        }
+
         // create new thread
         THREAD_RUNNING = true;
         THREAD = new std::thread([] {

src/spice2x/games/nost/nost.cpp

@@ -2,6 +2,7 @@
 #include "poke.h"
 #include "touch_mode.h"
 #include "hooks/setupapihook.h"
+#include "misc/wintouchemu.h"
 #include "touch/native/nativetouchhook.h"
 #include "avs/game.h"
 
@@ -41,11 +42,17 @@ namespace games::nost {
         setupapihook_init(avs::game::DLL_INSTANCE);
         setupapihook_add(touch_settings);
 
+        const auto native_touch_ready = !wintouchemu::FORCE &&
             nativetouch::hook(avs::game::DLL_INSTANCE);
+        if (!native_touch_ready) {
+            wintouchemu::FORCE = true;
+            wintouchemu::hook("nostalgia", avs::game::DLL_INSTANCE, 20);
+        } else {
             if (ENABLE_TOUCH_MODE) {
                 touch_mode::enable();
             }
         }
+    }
 
     void NostGame::post_attach() {
         if (ENABLE_POKE) {

src/spice2x/games/nost/poke.cpp

@@ -9,6 +9,7 @@
 #include "rawinput/rawinput.h"
 #include "misc/eamuse.h"
 #include "touch/native/inject.h"
+#include "touch/native/nativetouchhook.h"
 #include "util/logging.h"
 #include "util/precise_timer.h"
 
@@ -59,6 +60,11 @@ namespace games::nost::poke {
             return;
         }
 
+        if (!nativetouch::is_hooked()) {
+            log_warning("poke", "Nostalgia poke requires native touch; disabled");
+            return;
+        }
+
         // create new thread
         THREAD_RUNNING = true;
         THREAD = new std::thread([] {

src/spice2x/games/popn/popn.cpp

@@ -16,6 +16,7 @@
 #include "launcher/launcher.h"
 #include "launcher/logger.h"
 #include "misc/eamuse.h"
+#include "misc/wintouchemu.h"
 #include "util/sysutils.h"
 #include "io.h"
 #include "util/deferlog.h"
@@ -24,6 +25,7 @@
 namespace games::popn {
 
     bool SHOW_PIKA_MONITOR_WARNING = false;
+    bool NATIVE_TOUCH = true;
     
 #if SPICE64 && !SPICE_XP
 
@@ -713,7 +715,18 @@ namespace games::popn {
         //       00000100 0000000B 00000001  (button 9)
         //       set third column to 0 and it will work with BIO2
         
+        NATIVE_TOUCH = !wintouchemu::FORCE &&
             nativetouch::hook(avs::game::DLL_INSTANCE);
+        if (!NATIVE_TOUCH) {
+            wintouchemu::FORCE = true;
+            if (!GRAPHICS_WINDOWED || GRAPHICS_PREVENT_SECONDARY_WINDOWS) {
+                wintouchemu::INJECT_MOUSE_AS_WM_TOUCH = true;
+                wintouchemu::hook_title_ends(
+                    "",
+                    "Main Screen",
+                    avs::game::DLL_INSTANCE);
+            }
+        }
 
         sysutils::hook_EnumDisplayDevicesA();
 

src/spice2x/games/popn/popn.h

@@ -22,6 +22,7 @@ namespace games::popn {
 #endif
 
     extern bool SHOW_PIKA_MONITOR_WARNING;
+    extern bool NATIVE_TOUCH;
 
     class POPNGame : public games::Game {
     public:

src/spice2x/games/sdvx/sdvx.cpp

@@ -26,6 +26,7 @@
 #include "util/libutils.h"
 #include "util/sysutils.h"
 #include "misc/eamuse.h"
+#include "misc/wintouchemu.h"
 #include "touch/native/nativetouchhook.h"
 #include "bi2x_hook.h"
 #include "camera.h"
@@ -453,7 +454,18 @@ namespace games::sdvx {
             }
 
             if (is_valkyrie_model()) {
+                const auto native_touch_ready = !wintouchemu::FORCE &&
                     nativetouch::hook(avs::game::DLL_INSTANCE);
+                if (!native_touch_ready) {
+                    wintouchemu::FORCE = true;
+                    if (!GRAPHICS_WINDOWED) {
+                        wintouchemu::INJECT_MOUSE_AS_WM_TOUCH = true;
+                        wintouchemu::hook_title_ends(
+                            "SOUND VOLTEX",
+                            "Main Screen",
+                            avs::game::DLL_INSTANCE);
+                    }
+                }
 
                 // insert BI2X hooks
                 bi2x_hook_init();

src/spice2x/hooks/graphics/graphics.cpp

@@ -28,6 +28,7 @@
 #include "util/logging.h"
 #include "util/fileutils.h"
 #include "util/utils.h"
+#include "misc/wintouchemu.h"
 #include "touch/native/inject.h"
 #include "util/time.h"
 #include "rawinput/rawinput.h"
@@ -307,6 +308,22 @@ static LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM l
         }
     }
 
+    if (wintouchemu::INJECT_MOUSE_AS_WM_TOUCH) {
+        // drop mouse inputs since only wintouches should be used
+        switch (uMsg) {
+            case WM_MOUSEMOVE:
+            case WM_LBUTTONDOWN:
+            case WM_LBUTTONUP:
+            case WM_MBUTTONDOWN:
+            case WM_MBUTTONUP:
+            case WM_RBUTTONDOWN:
+            case WM_RBUTTONUP:
+            case WM_XBUTTONDOWN:
+            case WM_XBUTTONUP:
+                return true;
+        }
+    }
+
     // window resize
     graphics_windowed_wndproc(hWnd, uMsg, wParam, lParam);
 
@@ -786,7 +803,11 @@ static BOOL WINAPI MoveWindow_hook(HWND hWnd, int X, int Y, int nWidth, int nHei
             nWidth = rect.right - rect.left;
             nHeight = rect.bottom - rect.top;
 
+            if (games::iidx::NATIVE_TOUCH) {
                 nativetouch::inject::register_and_attach_window(TDJ_SUBSCREEN_WINDOW);
+            } else {
+                touch_attach_wnd(TDJ_SUBSCREEN_WINDOW);
+            }
         } else {
             // Existing behaviour: suppress subscreen window and prompt user to use overlay instead
              log_info(
@@ -1160,8 +1181,9 @@ void graphics_hook_window(HWND hWnd, D3DPRESENT_PARAMETERS *pPresentationParamet
         SetWindowLongPtrA(hWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(WindowProc));
 
         const bool native_touch_overlay =
-            (games::iidx::TDJ_MODE && !GRAPHICS_IIDX_WSUB) ||
+            (games::iidx::NATIVE_TOUCH && games::iidx::TDJ_MODE && !GRAPHICS_IIDX_WSUB) ||
-            (games::popn::is_pikapika_model() && GRAPHICS_PREVENT_SECONDARY_WINDOWS);
+            (games::popn::NATIVE_TOUCH &&
+             games::popn::is_pikapika_model() && GRAPHICS_PREVENT_SECONDARY_WINDOWS);
         if (native_touch_overlay) {
             nativetouch::inject::register_and_attach_window(hWnd);
         }

src/spice2x/launcher/launcher.cpp

@@ -38,10 +38,10 @@
 #include "games/gitadora/gitadora.h"
 #include "games/hpm/hpm.h"
 #include "games/iidx/iidx.h"
+#include "games/iidx/poke.h"
 #ifdef SPICE64
 #include "games/iidx/camera.h"
 #endif
-#include "games/iidx/poke.h"
 #include "games/jb/jb.h"
 #include "games/mga/mga.h"
 #include "games/nost/nost.h"
@@ -1783,7 +1783,7 @@ int main_implementation(int argc, char *argv[]) {
 
         // enable subscreen touch emulation
         if (options[launcher::Options::spice2x_IIDXEmulateSubscreenKeypadTouch].is_active()) {
-            games::iidx::poke::enable();
+            games::iidx::ENABLE_POKE = true;
         }
         if (options[launcher::Options::NostalgiaPoke].is_active()) {
             games::nost::ENABLE_POKE = true;

src/spice2x/launcher/options.cpp

@@ -1791,10 +1791,10 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
         .category = "Touch Parameters",
     },
     {
-        .title = "Force Touch Emulation",
+        .title = "Force Legacy Touch Emulation",
         .name = "touchemuforce",
         .desc = "Force enable hook for GetTouchInputInfo API and inject WM_TOUCH events. "
-                "This is automatically enabled when needed and is typically not required. Do not enable this unless you have trouble.",
+            "Do not enable this unless you have trouble with using a mouse to emulate touch input.",
         .type = OptionType::Bool,
         .category = "Touch Parameters",
     },

src/spice2x/misc/wintouchemu.cpp

@@ -4,19 +4,44 @@
 
 #include "wintouchemu.h"
 
+#include <chrono>
+#include <algorithm>
+#include <optional>
+#include <thread>
+
+#include "cfg/screen_resize.h"
+#include "games/gitadora/gitadora.h"
+#include "games/iidx/iidx.h"
+#include "games/popn/popn.h"
 #include "hooks/graphics/graphics.h"
 #include "overlay/overlay.h"
+#include "overlay/windows/generic_sub.h"
 #include "touch/touch.h"
 #include "util/detour.h"
 #include "util/logging.h"
+#include "util/time.h"
 #include "util/utils.h"
+#include "rawinput/touch.h"
+
+#include "avs/game.h"
 
 namespace wintouchemu {
 
+    typedef struct {
+        POINT pos;
+        bool last_button_pressed;
+        DWORD touch_event;
+    } mouse_state_t;
+
     // settings
     bool FORCE = false;
+    bool INJECT_MOUSE_AS_WM_TOUCH = false;
+    bool LOG_FPS = false;
     bool ADD_TOUCH_FLAG_PRIMARY = false;
     
+    // state
+    double last_touch_event = 0.0;
+
     static inline bool is_emu_enabled() {
         return FORCE || !is_touch_available("wintouchemu::is_emu_enabled") || GRAPHICS_SHOW_CURSOR;
     }
@@ -56,13 +81,16 @@ namespace wintouchemu {
 
     // state
     BOOL (WINAPI *GetTouchInputInfo_orig)(HANDLE, UINT, PTOUCHINPUT, int);
+    bool USE_MOUSE = false;
     std::vector<TouchEvent> TOUCH_EVENTS;
     std::vector<TouchPoint> TOUCH_POINTS;
     HMODULE HOOKED_MODULE = nullptr;
     std::string WINDOW_TITLE_START = "";
-    bool INITIALIZED = false;
+    std::optional<std::string> WINDOW_TITLE_END = std::nullopt;
+    volatile bool INITIALIZED = false;
+    mouse_state_t mouse_state;
 
-    void hook(const char *window_title, HMODULE module) {
+    void hook(const char *window_title, HMODULE module, int delay_in_s) {
 
         // hooks
         auto system_metrics_hook = detour::iat_try(
@@ -81,9 +109,32 @@ namespace wintouchemu {
         // set module and title
         HOOKED_MODULE = module;
         WINDOW_TITLE_START = window_title;
+
+        if (0 < delay_in_s) {
+            // some games crash when touch events are injected too early during boot
+            std::thread t([&]() {
+                log_misc("wintouchemu", "defer initialization until later (with delay of {}s)", delay_in_s);
+                std::this_thread::sleep_for(std::chrono::seconds(delay_in_s));
+                log_misc("wintouchemu", "initializing", delay_in_s);
+                INITIALIZED = true;
+            });
+            t.detach();
+        } else {
             log_misc("wintouchemu", "initializing");
             INITIALIZED = true;
         }
+    }
+
+    void hook_title_ends(const char *window_title_start, const char *window_title_end, HMODULE module) {
+        hook(window_title_start, module);
+
+        WINDOW_TITLE_END = window_title_end;
+    }
+
+    static void flip_touch_points(PTOUCHINPUT point) {
+        point->x = rawinput::touch::DISPLAY_SIZE_X * 100 - point->x;
+        point->y = rawinput::touch::DISPLAY_SIZE_Y * 100 - point->y;
+    }
 
     static BOOL WINAPI GetTouchInputInfoHook(HANDLE hTouchInput, UINT cInputs, PTOUCHINPUT pInputs, int cbSize) {
 
@@ -94,6 +145,7 @@ namespace wintouchemu {
 
         // set touch inputs
         bool result = false;
+        bool mouse_used = false;
         for (UINT input = 0; input < cInputs; input++) {
             auto *touch_input = &pInputs[input];
 
@@ -126,7 +178,13 @@ namespace wintouchemu {
 
                 // log_misc("wintouchemu", "touch event ({}, {})", to_string(x), to_string(y));
 
-                if (overlay::OVERLAY) {
+                if (GRAPHICS_IIDX_WSUB) {
+                    // touch was received on subscreen window.
+                    RECT clientRect {};
+                    GetClientRect(TDJ_SUBSCREEN_WINDOW, &clientRect);
+                    x = (float) x / clientRect.right * SPICETOUCH_TOUCH_WIDTH + SPICETOUCH_TOUCH_X;
+                    y = (float) y / clientRect.bottom * SPICETOUCH_TOUCH_HEIGHT + SPICETOUCH_TOUCH_Y;
+                } else if (overlay::OVERLAY) {
                     // touch was received on global coords
                     valid = overlay::OVERLAY->transform_touch_point(&x, &y);
                 } else {
@@ -172,10 +230,89 @@ namespace wintouchemu {
                 touch_input->cxContact = 0;
                 touch_input->cyContact = 0;
 
-            } else {
+                if (avs::game::is_model("KFC") &&
+                    rawinput::touch::DISPLAY_INITIALIZED &&
+                    rawinput::touch::DISPLAY_ORIENTATION == DMDO_270) {
+                    flip_touch_points(touch_input);
+                }
+
+            } else if (USE_MOUSE && !mouse_used) {
+
+                // disable further mouse inputs this call
+                mouse_used = true;
+
+                if (mouse_state.touch_event) {
+                    result = true;
+                    touch_input->x = mouse_state.pos.x;
+                    touch_input->y = mouse_state.pos.y;
+
+                    if (GRAPHICS_WINDOWED) {
+                        touch_input->x -= SPICETOUCH_TOUCH_X;
+                        touch_input->y -= SPICETOUCH_TOUCH_Y;
+                    }
+
+                    // log_misc(
+                    //     "wintouchemu",
+                    //     "mouse state ({}, {}) event={}",
+                    //     to_string(touch_input->x), to_string(touch_input->y), mouse_state.touch_event);
+
+                    auto valid = true;
+                    if (overlay::OVERLAY) {
+                        valid = overlay::OVERLAY->transform_touch_point(
+                            &touch_input->x, &touch_input->y);
+                    }
+
+                    // touch inputs require 100x precision per pixel
+                    touch_input->x *= 100;
+                    touch_input->y *= 100;
+                    touch_input->hSource = hTouchInput;
+                    touch_input->dwID = 0;
+                    touch_input->dwFlags = 0;
+                    switch (mouse_state.touch_event) {
+                        case TOUCHEVENTF_DOWN:
+                            if (valid) {
+                                if (ADD_TOUCH_FLAG_PRIMARY) {
+                                    touch_input->dwFlags |= TOUCHEVENTF_PRIMARY;
+                                }
+
+                                touch_input->dwFlags |= TOUCHEVENTF_DOWN;
+                            }
+                            break;
+                        case TOUCHEVENTF_MOVE:
+                            if (valid) {
+                                if (ADD_TOUCH_FLAG_PRIMARY) {
+                                    touch_input->dwFlags |= TOUCHEVENTF_PRIMARY;
+                                }
+
+                                touch_input->dwFlags |= TOUCHEVENTF_MOVE;
+                            }
+                            break;
+                        case TOUCHEVENTF_UP:
+                            // don't check valid so that this touch ID can be released
+                            if (ADD_TOUCH_FLAG_PRIMARY) {
+                                touch_input->dwFlags |= TOUCHEVENTF_PRIMARY;
+                            }
+
+                            touch_input->dwFlags |= TOUCHEVENTF_UP;
+                            break;
+                    }
+                    touch_input->dwMask = 0;
+                    touch_input->dwTime = 0;
+                    touch_input->dwExtraInfo = 0;
+                    touch_input->cxContact = 0;
+                    touch_input->cyContact = 0;
+
+                    // reset it since the event was consumed & propagated as touch
+                    mouse_state.touch_event = 0;
+                }
+            } else if (!GRAPHICS_IIDX_WSUB) {
+
+                /*
+                 * For some reason, Nostalgia won't show an active touch point unless a move event
+                 * triggers in the same frame. To work around this, we just supply a fake move
+                 * event if we didn't update the same pointer ID in the same call.
+                 */
 
-                // beatstream requires a MOVE for active points in each update
-                // add one for every active point without a matching input event
                 // find touch point which has no associated input event
                 TouchPoint *touch_point = nullptr;
                 for (auto &tp : TOUCH_POINTS) {
@@ -243,6 +380,21 @@ namespace wintouchemu {
                 title = get_window_title(hWnd);
             }
 
+            // if a window title end is set, check to see if it matches
+            if (WINDOW_TITLE_END.has_value() && !string_ends_with(title.c_str(), WINDOW_TITLE_END.value().c_str())) {
+                hWnd = nullptr;
+                title = "";
+
+                for (auto &window : find_windows_beginning_with(WINDOW_TITLE_START)) {
+                    auto check_title = get_window_title(window);
+                    if (string_ends_with(check_title.c_str(), WINDOW_TITLE_END.value().c_str())) {
+                        hWnd = std::move(window);
+                        title = std::move(check_title);
+                        break;
+                    }
+                }
+            }
+
             // check window
             if (hWnd == nullptr) {
                 return;
@@ -250,13 +402,39 @@ namespace wintouchemu {
 
             // check if windowed
             if (GRAPHICS_WINDOWED) {
+                if (GRAPHICS_IIDX_WSUB) {
+                    // no handling is needed here
+                    // graphics::MoveWindow_hook will attach hook to windowed subscreen
+                    log_info("wintouchemu", "attach touch hook to windowed subscreen for TDJ");
+                    USE_MOUSE = false;
+                } else if (avs::game::is_model("LDJ") && !GENERIC_SUB_WINDOW_FULLSIZE) {
+                    // overlay subscreen in IIDX
+                    // use mouse position as ImGui overlay will block the touch window  
+                    log_info("wintouchemu", "use mouse cursor API for ldj overlay subscreen");
+                    USE_MOUSE = true;
+                } else if (games::popn::is_pikapika_model()) {
+                    // same as iidx case above
+                    log_info("wintouchemu", "use mouse cursor API for popn overlay subscreen");
+                    USE_MOUSE = true;
+                } else if (games::gitadora::is_arena_model() && GRAPHICS_PREVENT_SECONDARY_WINDOWS) {
+                    log_info("wintouchemu", "use mouse cursor API for gitadora overlay subscreen");
+                    USE_MOUSE = true;
+                } else {
                     // create touch window - create overlay if not yet existing at this point
                     log_info("wintouchemu", "create touch window relative to main game window");
                     touch_create_wnd(hWnd, overlay::ENABLED && !overlay::OVERLAY);
+                    USE_MOUSE = false;
+                }
+            } else if (INJECT_MOUSE_AS_WM_TOUCH) {
+                log_info(
+                    "wintouchemu",
+                    "using raw mouse cursor API in full screen and injecting them as WM_TOUCH events");
+                USE_MOUSE = true;
             } else {
                 log_info("wintouchemu", "activating DirectX hooks");
                 // mouse position based input only
                 touch_attach_dx_hook();
+                USE_MOUSE = false;
             }
 
             // hooks
@@ -267,6 +445,8 @@ namespace wintouchemu {
             }
         }
 
+        const auto now = get_performance_milliseconds();
+
         // update touch events
         if (hWnd != nullptr) {
 
@@ -286,11 +466,56 @@ namespace wintouchemu {
 
             // check if new events are available
             if (event_count > 0) {
+                last_touch_event = now;
+
                 // send fake event to make the game update it's touch inputs
                 auto wndProc = (WNDPROC) GetWindowLongPtr(hWnd, GWLP_WNDPROC);
                 wndProc(hWnd, WM_TOUCH, MAKEWORD(event_count, 0), (LPARAM) GetTouchInputInfoHook);
             }
 
+            // update frame logging
+            if (LOG_FPS) {
+                static int log_frames = 0;
+                static uint64_t log_time = 0;
+                log_frames++;
+                if (log_time < get_system_seconds()) {
+                    if (log_time > 0) {
+                        log_info("wintouchemu", "polling at {} touch frames per second", log_frames);
+                    }
+                    log_frames = 0;
+                    log_time = get_system_seconds();
+                }
+            }
+        }
+
+        // send separate WM_TOUCH event for mouse
+        // this must be separate from actual touch events because some games will ignore the return
+        // value from GetTouchInputInfo or fail to read dwFlags for valid events, so it's not OK to
+        // send empty events when the mouse button is not clicked/released
+        if (hWnd != nullptr && USE_MOUSE) {
+            bool button_pressed = get_async_primary_mouse();
+
+            // if there was a touch event in the last 500 ms, don't insert new button presses
+            if (button_pressed && (now - last_touch_event) < 500) {
+                button_pressed = false;
+            }
+
+            // figure out what kind of touch event to simulate
+            if (button_pressed && !mouse_state.last_button_pressed) {
+                mouse_state.touch_event = TOUCHEVENTF_DOWN;
+            } else if (button_pressed && mouse_state.last_button_pressed) {
+                mouse_state.touch_event = TOUCHEVENTF_MOVE;
+            } else if (!button_pressed && mouse_state.last_button_pressed) {
+                mouse_state.touch_event = TOUCHEVENTF_UP;
+            }
+
+            mouse_state.last_button_pressed = button_pressed;
+            if (mouse_state.touch_event) {
+                GetCursorPos(&mouse_state.pos);
+                // send fake event to make the game update it's touch inputs
+                auto wndProc = (WNDPROC) GetWindowLongPtr(hWnd, GWLP_WNDPROC);
+                wndProc(hWnd, WM_TOUCH, MAKEWORD(1, 0), (LPARAM) GetTouchInputInfoHook);
+            }
         }
     }
 }

src/spice2x/misc/wintouchemu.h

@@ -6,8 +6,14 @@ namespace wintouchemu {
 
     // settings
     extern bool FORCE;
+    extern bool INJECT_MOUSE_AS_WM_TOUCH;
+    extern bool LOG_FPS;
     extern bool ADD_TOUCH_FLAG_PRIMARY;
 
-    void hook(const char *window_title, HMODULE module = nullptr);
+    void hook(const char *window_title, HMODULE module = nullptr, int delay_in_s=0);
+    void hook_title_ends(
+        const char *window_title_start,
+        const char *window_title_ends,
+        HMODULE module = nullptr);
     void update();
 }

src/spice2x/touch/native/inject.cpp

@@ -338,9 +338,7 @@ namespace nativetouch::inject {
 
     // attach mouse injection without replacing the window's existing procedure
     static void attach_window_impl(HWND window, bool register_touch) {
-        initialize_touch_injection();
+        if (!initialize_touch_injection()) {
-
-        if (!touch_injection_available()) {
             if (register_touch) {
                 log_warning(
                     "touch::native",
@@ -422,7 +420,7 @@ namespace nativetouch::inject {
     }
 
     // load and initialize Windows 8 touch injection without a static API dependency
-    void initialize_touch_injection() {
+    bool initialize_touch_injection() {
         std::call_once(initialization_once, [] {
             initialize_synthetic_touch();
             contact_refresh_message =
@@ -433,17 +431,26 @@ namespace nativetouch::inject {
             }
 
             // load all APIs from user32 without adding static imports
+            //
+            // note that these are expected to be present in Windows 8 and above;
+            // however, on WINE, touch implementation remains in Windows 7 era
+            // and therefore the hooks below will fail, hence the fallback to
+            // legacy wintouchemu code
             const auto user32 = libutils::load_library("user32.dll");
             InitializeTouchInjection_ptr = libutils::try_proc<decltype(InitializeTouchInjection_ptr)>(
                 user32, "InitializeTouchInjection");
+            if (InitializeTouchInjection_ptr == nullptr) {
+                log_warning(
+                    "touch::native", "InitializeTouchInjection unavailable; mouse touch injection disabled");
+                return;
+            }
+
             InjectTouchInput_ptr = libutils::try_proc<decltype(InjectTouchInput_ptr)>(
                 user32, "InjectTouchInput");
-
+            if (InjectTouchInput_ptr == nullptr) {
-            if (InitializeTouchInjection_ptr == nullptr ||
-                InjectTouchInput_ptr == nullptr) {
                 clear_touch_injection_functions();
                 log_warning(
-                    "touch::native", "touch injection API unavailable; mouse touch injection disabled");
+                    "touch::native", "InjectTouchInput unavailable; mouse touch injection disabled");
                 return;
             }
 
@@ -457,20 +464,31 @@ namespace nativetouch::inject {
 
             log_misc("touch::native", "mouse touch injection initialized");
         });
-    }
+        return InitializeTouchInjection_ptr != nullptr && InjectTouchInput_ptr != nullptr;
-
-    bool touch_injection_available() {
-        return InjectTouchInput_ptr != nullptr;
     }
 
     // install injection support for touch windows registered by the game module
-    void hook(HMODULE module) {
+    bool hook_available(HMODULE module) {
-        initialize_touch_injection();
+        if (detour::iat_find("RegisterTouchWindow", module) == nullptr) {
+            log_warning("touch::native", "RegisterTouchWindow unavailable");
+            return false;
+        }
+        return true;
+    }
+
+    bool hook(HMODULE module) {
+        if (!initialize_touch_injection()) {
+            return false;
+        }
 
         RegisterTouchWindow_orig = detour::iat_try(
             "RegisterTouchWindow", RegisterTouchWindowHook, module);
-        if (RegisterTouchWindow_orig != nullptr) {
+        if (RegisterTouchWindow_orig == nullptr) {
+            log_warning("touch::native", "failed to hook RegisterTouchWindow");
+            return false;
+        }
+
         log_misc("touch::native", "RegisterTouchWindow hooked");
-        }
+        return true;
     }
 }

src/spice2x/touch/native/inject.h

@@ -7,7 +7,8 @@ struct tagTOUCHINPUT;
 namespace nativetouch::inject {
     void attach_window(HWND window);
     void register_and_attach_window(HWND window);
-    void hook(HMODULE module);
+    bool hook_available(HMODULE module);
+    bool hook(HMODULE module);
     bool inject_synthetic_touch(POINT position, bool down);
     bool inject_synthetic_touch_from_canvas(POINT position, SIZE canvas, bool down);
     bool transform_touch_input(tagTOUCHINPUT *point);

src/spice2x/touch/native/inject_internal.h

@@ -10,9 +10,8 @@ namespace nativetouch::inject {
         Synthetic,
     };
 
-    void initialize_touch_injection();
+    bool initialize_touch_injection();
     void initialize_synthetic_touch();
-    bool touch_injection_available();
     void refresh_contact_lifetime();
 
     bool contact_is_active();

src/spice2x/touch/native/inject_synthetic.cpp

@@ -113,11 +113,12 @@ namespace nativetouch::inject {
     }
 
     static HWND prepare_synthetic_touch() {
-        initialize_touch_injection();
+        if (!initialize_touch_injection()) {
+            return nullptr;
+        }
 
         const auto window = get_injection_window();
-        if (!touch_injection_available() || window == nullptr ||
+        if (window == nullptr || synthetic_touch_message == 0) {
-            synthetic_touch_message == 0) {
             return nullptr;
         }
         return window;

src/spice2x/touch/native/nativetouchhook.cpp

@@ -223,25 +223,58 @@ namespace nativetouch {
         }
     }
 
-    void hook(HMODULE module) {
+    static bool hook_prerequisites_available(HMODULE module) {
+        if (detour::iat_find("GetTouchInputInfo", module) == nullptr) {
+            log_warning("touch::native", "GetTouchInputInfo unavailable");
+            return false;
+        }
+        if (settings::EMULATE_DIGITIZER &&
+            detour::iat_find("GetSystemMetrics", module) == nullptr) {
+            log_warning("touch::native", "GetSystemMetrics unavailable");
+            return false;
+        }
+        return true;
+    }
+
+    bool hook(HMODULE module) {
+        native_touch_hooked = false;
         initialize_game_settings();
 
-        inject::hook(module);
+        // check if the OS supports touch API (Win7+) and injection API (requires Win8+)
+        if (!hook_prerequisites_available(module)) {
+            return false;
+        }
+        if (!inject::hook_available(module)) {
+            return false;
+        }
 
-        native_touch_hooked = true;
+        // try hooking injection API first since they require the highest OS level
+        // (WINE specifically did not implement this in 2026)
+        if (!inject::hook(module)) {
+            return false;
+        }
 
+        // GetSystemMetrics
         if (settings::EMULATE_DIGITIZER) {
             GetSystemMetrics_orig = detour::iat_try(
                 "GetSystemMetrics", GetSystemMetricsHook, module);
-            if (GetSystemMetrics_orig != nullptr) {
+            if (GetSystemMetrics_orig == nullptr) {
+                log_warning("touch::native", "failed to hook GetSystemMetrics");
+                return false;
+            }
             log_misc("touch::native", "GetSystemMetrics hooked");
         }
-        }
 
+        // GetTouchInputInfo
         GetTouchInputInfo_orig = detour::iat_try("GetTouchInputInfo", GetTouchInputInfoHook, module);
-        if (GetTouchInputInfo_orig != nullptr) {
+        if (GetTouchInputInfo_orig == nullptr) {
+            log_warning("touch::native", "failed to hook GetTouchInputInfo");
+            return false;
+        }
         log_misc("touch::native", "GetTouchInputInfo hooked");
-        }
+        
+        native_touch_hooked = true;
+        return true;
     }
 
 }

src/spice2x/touch/native/nativetouchhook.h

@@ -15,7 +15,7 @@ namespace nativetouch {
 
     using TouchInputFilter = bool (*)(const NativeTouchEvent &event);
 
-    void hook(HMODULE module);
+    bool hook(HMODULE module);
     void refresh_contact_lifetime();
     void set_input_filter(TouchInputFilter filter);