gitadora: (arena model) single window mode + subscreen overlay (#486)

## Link to GitHub Issue, if one exists
#477 

## Description of change
This is a work in progress.

What works:
- [x] subscreen overlay shows the touch screen image (in windowed mode)
- [x] touch works in the overlay
- [x] only the main window is shown, other windows are not launched

What doesn't:
- [ ] game occasionally crashes when entering test menu?
- [ ] full screen mode is not tested at all due to monitor requirements
- [ ] need more polish (various options to control the behavior)

src/spice2x/games/gitadora/gitadora.cpp

@@ -5,6 +5,7 @@
 #include "cfg/configurator.h"
 #include "hooks/audio/mme.h"
 #include "hooks/graphics/graphics.h"
+#include "misc/wintouchemu.h"
 #include "overlay/overlay.h"
 #include "util/cpuutils.h"
 #include "util/detour.h"
@@ -19,8 +20,10 @@ namespace games::gitadora {
     // settings
     bool TWOCHANNEL = false;
     std::optional<unsigned int> CAB_TYPE = std::nullopt;
+    bool ARENA_SINGLE_WINDOW = false;
     bool P1_LEFTY = false;
     bool P2_LEFTY = false;
+    std::optional<std::string> SUBSCREEN_OVERLAY_SIZE;
 
     /*
      * Prevent GitaDora from creating folders on F drive
@@ -285,6 +288,13 @@ namespace games::gitadora {
 
             // volume change prevention
             hooks::audio::mme::init(avs::game::DLL_INSTANCE);
+
+            // touch hook
+            if (ARENA_SINGLE_WINDOW) {
+                wintouchemu::FORCE = true;
+                wintouchemu::INJECT_MOUSE_AS_WM_TOUCH = true;
+                wintouchemu::hook("GITADORA", avs::game::DLL_INSTANCE);
+            }
             return;
         }
 

src/spice2x/games/gitadora/gitadora.h

@@ -10,8 +10,10 @@ namespace games::gitadora {
     // settings
     extern bool TWOCHANNEL;
     extern std::optional<unsigned int> CAB_TYPE;
+    extern bool ARENA_SINGLE_WINDOW;
     extern bool P1_LEFTY;
     extern bool P2_LEFTY;
+    extern std::optional<std::string> SUBSCREEN_OVERLAY_SIZE;
 
     class GitaDoraGame : public games::Game {
     public: