gfx_joystick.c

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/* joystick handling, win32 */

#include "../fb_gfx.h"
#include "fb_gfx_win32.h"
#include <mmsystem.h>

#define CALCPOS(pos, min, max)  (((((float)(pos) - (float)(min)) * 2.0) / ((float)(max) - (float)(min) + 1.0)) - 1.0)

typedef struct _JOYDATA {
        int detected, available;
        JOYCAPS caps;
} JOYDATA;

static JOYDATA joy[16];
static int inited = FALSE;

#define POV_LAP 2250

FBCALL int fb_GfxGetJoystick(int id, ssize_t *buttons, float *a1, float *a2, float *a3, float *a4, float *a5, float *a6, float *a7, float *a8)
{
        JOYINFOEX info;
        JOYDATA *j;

        *buttons = -1;
        *a1 = *a2 = *a3 = *a4 = *a5 = *a6 = *a7 = *a8 = -1000.0;

        if (!inited) {
                fb_hMemSet(joy, 0, sizeof(JOYDATA) * 16);
                inited = TRUE;
        }

        if ((id < 0) || (id > 15))
                return fb_ErrorSetNum(FB_RTERROR_ILLEGALFUNCTIONCALL);
        j = &joy[id];

        if (!j->detected) {
                j->detected = TRUE;
                if (joyGetDevCaps(id + JOYSTICKID1, &j->caps, sizeof(j->caps)) != JOYERR_NOERROR)
                        return fb_ErrorSetNum(FB_RTERROR_ILLEGALFUNCTIONCALL);
                j->available = TRUE;
        }
        if (!j->available)
                return fb_ErrorSetNum(FB_RTERROR_ILLEGALFUNCTIONCALL);

        info.dwSize = sizeof(info);
        info.dwFlags = JOY_RETURNALL;
        if (joyGetPosEx(id + JOYSTICKID1, &info) != JOYERR_NOERROR)
                return fb_ErrorSetNum(FB_RTERROR_ILLEGALFUNCTIONCALL);
        *a1 = CALCPOS(info.dwXpos, j->caps.wXmin, j->caps.wXmax);
        *a2 = CALCPOS(info.dwYpos, j->caps.wYmin, j->caps.wYmax);
        if (j->caps.wCaps & JOYCAPS_HASZ)
                *a3 = CALCPOS(info.dwZpos, j->caps.wZmin, j->caps.wZmax);
        if (j->caps.wCaps & JOYCAPS_HASR)
                *a4 = CALCPOS(info.dwRpos, j->caps.wRmin, j->caps.wRmax);
        if (j->caps.wCaps & JOYCAPS_HASU)
                *a5 = CALCPOS(info.dwUpos, j->caps.wUmin, j->caps.wUmax);
        if (j->caps.wCaps & JOYCAPS_HASV)
                *a6 = CALCPOS(info.dwVpos, j->caps.wVmin, j->caps.wVmax);
        if (j->caps.wCaps & JOYCAPS_HASPOV)
        {
                *a7 = *a8 = 0;

                if(( info.dwPOV > 4500 - POV_LAP ) && ( info.dwPOV < 13500 + POV_LAP ))
                        *a7 = 1;
                else if(( info.dwPOV > 22500 - POV_LAP ) && ( info.dwPOV < 31500 + POV_LAP ))
                        *a7 = -1;

                if(( info.dwPOV > 13500 - POV_LAP ) && ( info.dwPOV < 22500 + POV_LAP ))
                        *a8 = 1;
                else if(( info.dwPOV >= 0 ) && ( info.dwPOV < 4500 + POV_LAP ))
                        *a8 = -1;
                else if(( info.dwPOV > 31500 - POV_LAP ) && ( info.dwPOV < 36000 ))
                        *a8 = -1;
        }

        *buttons = info.dwButtons;

        return fb_ErrorSetNum( FB_RTERROR_OK );
}