Adding Guncon support for mouse based lightguns

diff --git a/frontend/libretro.c b/frontend/libretro.c
index 081f8ba..620cd17 100644 (file)
--- a/frontend/libretro.c
+++ b/frontend/libretro.c
@@ -571,6 +571,8 @@ static void update_controller_port_variable(unsigned port)
                        in_type[port] = PSE_PAD_TYPE_ANALOGPAD;
                else if (strcmp(var.value, "negcon") == 0)
                        in_type[port] = PSE_PAD_TYPE_NEGCON;
+               else if (strcmp(var.value, "guncon") == 0)
+                       in_type[port] = PSE_PAD_TYPE_GUNCON;
                else if (strcmp(var.value, "none") == 0)
                        in_type[port] = PSE_PAD_TYPE_NONE;
                // else 'default' case, do nothing
@@ -1907,6 +1909,94 @@ void retro_run(void)
          }
       }
 
+               if (in_type[i] == PSE_PAD_TYPE_GUNCON)
+               {
+                       //ToDo move across to:
+                       //RETRO_DEVICE_ID_LIGHTGUN_SCREEN_X
+                       //RETRO_DEVICE_ID_LIGHTGUN_SCREEN_Y   
+                       //RETRO_DEVICE_ID_LIGHTGUN_TRIGGER
+                       //RETRO_DEVICE_ID_LIGHTGUN_RELOAD
+                       //RETRO_DEVICE_ID_LIGHTGUN_AUX_A 
+                       //RETRO_DEVICE_ID_LIGHTGUN_AUX_B
+                       //Though not sure these are hooked up properly on the Pi
+                       
+                       //ToDo
+                       //Put the controller index back to i instead of hardcoding to 1 when the libretro overlay crash bug is fixed
+                       //This is required for 2 player
+                       
+                       //GUNCON has 3 controls, Trigger,A,B which equal Circle,Start,Cross
+                       
+                       // Trigger
+                       //input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_O)
+                       //The 1 is hardcoded instead of i to prevent the overlay mouse button libretro crash bug
+                       if (input_state_cb(1, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_LEFT)){
+                               in_keystate[i] |= (1 << DKEY_CIRCLE);
+                       }
+                       
+                       // A
+                       if (input_state_cb(1, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_RIGHT)){
+                               in_keystate[i] |= (1 << DKEY_START);
+                       }
+                       
+                       // B
+                       if (input_state_cb(1, RETRO_DEVICE_MOUSE, 0, RETRO_DEVICE_ID_MOUSE_MIDDLE)){
+                               in_keystate[i] |= (1 << DKEY_CROSS);
+                       }
+                       
+                       //The 1 is hardcoded instead of i to prevent the overlay mouse button libretro crash bug
+                       int gunx = input_state_cb(1, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_X);
+                       int guny = input_state_cb(1, RETRO_DEVICE_POINTER, 0, RETRO_DEVICE_ID_POINTER_Y);
+                       
+                       //This adjustment process gives the user the ability to manually align the mouse up better 
+                       //with where the shots are in the emulator.
+                       
+                       //Percentage distance of screen to adjust 
+                       int GunconAdjustX = 0;
+                       int GunconAdjustY = 0;
+                       
+                       //Used when out by a percentage
+                       float GunconAdjustRatioX = 1;
+                       float GunconAdjustRatioY = 1;
+                               
+                       struct retro_variable var;
+                       var.value = NULL;
+                       var.key = "pcsx_rearmed_gunconadjustx";
+                       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+                       {
+                               GunconAdjustX = atoi(var.value);        
+                       }
+                       
+                       var.value = NULL;
+                       var.key = "pcsx_rearmed_gunconadjusty";
+                       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+                       {
+                               GunconAdjustY = atoi(var.value);        
+                       } 
+                       
+                       
+                       var.value = NULL;
+                       var.key = "pcsx_rearmed_gunconadjustratiox";
+                       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+                       {
+                               GunconAdjustRatioX = atof(var.value);   
+                       } 
+                       
+                       
+                       var.value = NULL;
+                       var.key = "pcsx_rearmed_gunconadjustratioy";
+                       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+                       {
+                               GunconAdjustRatioY = atof(var.value);   
+                       } 
+                       
+                       //Mouse range is -32767 -> 32767
+                       //1% is about 655
+                       //Use the left analog stick field to store the absolute coordinates
+                       in_analog_left[0][0] = (gunx*GunconAdjustRatioX) + (GunconAdjustX * 655);
+                       in_analog_left[0][1] = (guny*GunconAdjustRatioY) + (GunconAdjustY * 655);
+                       
+                       
+               }
                if (in_type[i] == PSE_PAD_TYPE_NEGCON)
                {
                        // Query digital inputs
@@ -2011,7 +2101,7 @@ void retro_run(void)
                        // > NeGcon L
                        in_analog_left[i][1] = get_analog_button(ret, input_state_cb, i, RETRO_DEVICE_ID_JOYPAD_L);
                }
-               else
+               if (in_type[i] != PSE_PAD_TYPE_NEGCON && in_type[i] != PSE_PAD_TYPE_GUNCON)
                {
                        // Query digital inputs
                        for (j = 0; j < RETRO_PSX_MAP_LEN; j++)