ported joystick config to qt. sdl-joystick implementation from pcem

src/qt/sdl_joystick.cpp

@@ -0,0 +1,159 @@
+// Lifted from wx-sdl2-joystick.c in PCem
+
+#include <SDL2/SDL.h>
+
+extern "C" {
+#include <86box/device.h>
+#include <86box/gameport.h>
+
+int joysticks_present;
+joystick_t joystick_state[MAX_JOYSTICKS];
+plat_joystick_t plat_joystick_state[MAX_PLAT_JOYSTICKS];
+static SDL_Joystick *sdl_joy[MAX_PLAT_JOYSTICKS];
+}
+
+void joystick_init() {
+    if (SDL_InitSubSystem(SDL_INIT_JOYSTICK) != 0) {
+        return;
+    }
+    joysticks_present = SDL_NumJoysticks();
+
+    memset(sdl_joy, 0, sizeof(sdl_joy));
+    for (int c = 0; c < joysticks_present; c++)
+    {
+        sdl_joy[c] = SDL_JoystickOpen(c);
+
+        if (sdl_joy[c])
+        {
+            int d;
+
+            strncpy(plat_joystick_state[c].name, SDL_JoystickNameForIndex(c), 64);
+            plat_joystick_state[c].nr_axes = SDL_JoystickNumAxes(sdl_joy[c]);
+            plat_joystick_state[c].nr_buttons = SDL_JoystickNumButtons(sdl_joy[c]);
+            plat_joystick_state[c].nr_povs = SDL_JoystickNumHats(sdl_joy[c]);
+
+            for (d = 0; d < std::min(plat_joystick_state[c].nr_axes, 8); d++)
+            {
+                sprintf(plat_joystick_state[c].axis[d].name, "Axis %i", d);
+                plat_joystick_state[c].axis[d].id = d;
+            }
+            for (d = 0; d < std::min(plat_joystick_state[c].nr_buttons, 8); d++)
+            {
+                sprintf(plat_joystick_state[c].button[d].name, "Button %i", d);
+                plat_joystick_state[c].button[d].id = d;
+            }
+            for (d = 0; d < std::min(plat_joystick_state[c].nr_povs, 4); d++)
+            {
+                sprintf(plat_joystick_state[c].pov[d].name, "POV %i", d);
+                plat_joystick_state[c].pov[d].id = d;
+            }
+        }
+    }
+}
+
+void joystick_close()
+{
+    int c;
+
+    for (c = 0; c < joysticks_present; c++)
+    {
+        if (sdl_joy[c])
+            SDL_JoystickClose(sdl_joy[c]);
+    }
+}
+
+static int joystick_get_axis(int joystick_nr, int mapping)
+{
+    if (mapping & POV_X)
+    {
+        switch (plat_joystick_state[joystick_nr].p[mapping & 3])
+        {
+        case SDL_HAT_LEFTUP: case SDL_HAT_LEFT: case SDL_HAT_LEFTDOWN:
+            return -32767;
+
+        case SDL_HAT_RIGHTUP: case SDL_HAT_RIGHT: case SDL_HAT_RIGHTDOWN:
+            return 32767;
+
+        default:
+            return 0;
+        }
+    }
+    else if (mapping & POV_Y)
+    {
+        switch (plat_joystick_state[joystick_nr].p[mapping & 3])
+        {
+        case SDL_HAT_LEFTUP: case SDL_HAT_UP: case SDL_HAT_RIGHTUP:
+            return -32767;
+
+        case SDL_HAT_LEFTDOWN: case SDL_HAT_DOWN: case SDL_HAT_RIGHTDOWN:
+            return 32767;
+
+        default:
+            return 0;
+        }
+    }
+    else
+        return plat_joystick_state[joystick_nr].a[plat_joystick_state[joystick_nr].axis[mapping].id];
+}
+void joystick_process()
+{
+    int c, d;
+
+    SDL_JoystickUpdate();
+    for (c = 0; c < joysticks_present; c++)
+    {
+        int b;
+
+        plat_joystick_state[c].a[0] = SDL_JoystickGetAxis(sdl_joy[c], 0);
+        plat_joystick_state[c].a[1] = SDL_JoystickGetAxis(sdl_joy[c], 1);
+        plat_joystick_state[c].a[2] = SDL_JoystickGetAxis(sdl_joy[c], 2);
+        plat_joystick_state[c].a[3] = SDL_JoystickGetAxis(sdl_joy[c], 3);
+        plat_joystick_state[c].a[4] = SDL_JoystickGetAxis(sdl_joy[c], 4);
+        plat_joystick_state[c].a[5] = SDL_JoystickGetAxis(sdl_joy[c], 5);
+
+        for (b = 0; b < 16; b++)
+            plat_joystick_state[c].b[b] = SDL_JoystickGetButton(sdl_joy[c], b);
+
+        for (b = 0; b < 4; b++)
+            plat_joystick_state[c].p[b] = SDL_JoystickGetHat(sdl_joy[c], b);
+        //                pclog("joystick %i - x=%i y=%i b[0]=%i b[1]=%i  %i\n", c, joystick_state[c].x, joystick_state[c].y, joystick_state[c].b[0], joystick_state[c].b[1], joysticks_present);
+    }
+
+    for (c = 0; c < joystick_get_max_joysticks(joystick_type); c++)
+    {
+        if (joystick_state[c].plat_joystick_nr)
+        {
+            int joystick_nr = joystick_state[c].plat_joystick_nr - 1;
+
+            for (d = 0; d < joystick_get_axis_count(joystick_type); d++)
+                joystick_state[c].axis[d] = joystick_get_axis(joystick_nr, joystick_state[c].axis_mapping[d]);
+            for (d = 0; d < joystick_get_button_count(joystick_type); d++)
+                joystick_state[c].button[d] = plat_joystick_state[joystick_nr].b[joystick_state[c].button_mapping[d]];
+            for (d = 0; d < joystick_get_pov_count(joystick_type); d++)
+            {
+                int x, y;
+                double angle, magnitude;
+
+                x = joystick_get_axis(joystick_nr, joystick_state[c].pov_mapping[d][0]);
+                y = joystick_get_axis(joystick_nr, joystick_state[c].pov_mapping[d][1]);
+
+                angle = (atan2((double)y, (double)x) * 360.0) / (2*M_PI);
+                magnitude = sqrt((double)x*(double)x + (double)y*(double)y);
+
+                if (magnitude < 16384)
+                    joystick_state[c].pov[d] = -1;
+                else
+                    joystick_state[c].pov[d] = ((int)angle + 90 + 360) % 360;
+            }
+        }
+        else
+        {
+            for (d = 0; d < joystick_get_axis_count(joystick_type); d++)
+                joystick_state[c].axis[d] = 0;
+            for (d = 0; d < joystick_get_button_count(joystick_type); d++)
+                joystick_state[c].button[d] = 0;
+            for (d = 0; d < joystick_get_pov_count(joystick_type); d++)
+                joystick_state[c].pov[d] = -1;
+        }
+    }
+}