int _glfwPlatformGetJoystickParam(int joy, int param)
{
JOYCAPS jc;
if (!isJoystickPresent(joy))
return 0;
// We got this far, the joystick is present
if (param == GLFW_PRESENT)
return GL_TRUE;
// Get joystick capabilities
_glfw_joyGetDevCaps(joy - GLFW_JOYSTICK_1, &jc, sizeof(JOYCAPS));
switch (param)
{
case GLFW_AXES:
// Return number of joystick axes
return jc.wNumAxes;
case GLFW_BUTTONS:
// Return number of joystick axes
return jc.wNumButtons;
default:
break;
}
return 0;
}
int _glfwPlatformGetJoystickButtons(int joy, unsigned char* buttons,
int numbuttons)
{
JOYCAPS jc;
JOYINFOEX ji;
int button;
if (!isJoystickPresent(joy))
return 0;
// Get joystick capabilities
_glfw_joyGetDevCaps(joy - GLFW_JOYSTICK_1, &jc, sizeof(JOYCAPS));
// Get joystick state
ji.dwSize = sizeof(JOYINFOEX);
ji.dwFlags = JOY_RETURNBUTTONS;
_glfw_joyGetPosEx(joy - GLFW_JOYSTICK_1, &ji);
// Get states of all requested buttons
for (button = 0; button < numbuttons && button < (int) jc.wNumButtons; button++)
{
buttons[button] = (unsigned char)
(ji.dwButtons & (1UL << button) ? GLFW_PRESS : GLFW_RELEASE);
}
return button;
}
int _glfwPlatformGetJoystickButtons(int joy, unsigned char* buttons,
int numbuttons)
{
JOYCAPS jc;
JOYINFOEX ji;
int button, hats;
// Bit fields of button presses for each direction, including nil
const int directions[9] = { 1, 3, 2, 6, 4, 12, 8, 9, 0 };
if (!isJoystickPresent(joy))
return 0;
// Get joystick capabilities
_glfw_joyGetDevCaps(joy - GLFW_JOYSTICK_1, &jc, sizeof(JOYCAPS));
// Get joystick state
ji.dwSize = sizeof(JOYINFOEX);
ji.dwFlags = JOY_RETURNBUTTONS | JOY_RETURNPOV;
_glfw_joyGetPosEx(joy - GLFW_JOYSTICK_1, &ji);
// Get states of all requested buttons
for (button = 0; button < numbuttons && button < (int) jc.wNumButtons; button++)
{
buttons[button] = (unsigned char)
(ji.dwButtons & (1UL << button) ? GLFW_PRESS : GLFW_RELEASE);
}
// Virtual buttons - Inject data from hats
// Each hat is exposed as 4 buttons which exposes 8 directions with
// concurrent button presses
// NOTE: this API exposes only one hat
hats = (jc.wCaps & JOYCAPS_HASPOV) && (jc.wCaps & JOYCAPS_POV4DIR) ? 1 : 0;
if (hats > 0)
{
int j, value = ji.dwPOV / 100 / 45;
if (value < 0 || value > 8)
value = 8;
for (j = 0; j < 4 && button < numbuttons; j++)
{
if (directions[value] & (1 << j))
buttons[button] = GLFW_PRESS;
else
buttons[button] = GLFW_RELEASE;
button++;
}
}
return button;
}
const char* _glfwPlatformGetJoystickName(int joy)
{
JOYCAPS jc;
const int i = joy - GLFW_JOYSTICK_1;
if (!isJoystickPresent(joy))
return NULL;
_glfw_joyGetDevCaps(i, &jc, sizeof(JOYCAPS));
free(_glfw.win32.joystick[i].name);
_glfw.win32.joystick[i].name = _glfwCreateUTF8FromWideString(jc.szPname);
return _glfw.win32.joystick[i].name;
}
int _glfwPlatformGetJoystickPos(int joy, float* pos, int numaxes)
{
JOYCAPS jc;
JOYINFOEX ji;
int axis;
if (!isJoystickPresent(joy))
return 0;
// Get joystick capabilities
_glfw_joyGetDevCaps(joy - GLFW_JOYSTICK_1, &jc, sizeof(JOYCAPS));
// Get joystick state
ji.dwSize = sizeof(JOYINFOEX);
ji.dwFlags = JOY_RETURNX | JOY_RETURNY | JOY_RETURNZ |
JOY_RETURNR | JOY_RETURNU | JOY_RETURNV;
_glfw_joyGetPosEx(joy - GLFW_JOYSTICK_1, &ji);
// Get position values for all axes
axis = 0;
if (axis < numaxes)
pos[axis++] = calcJoystickPos(ji.dwXpos, jc.wXmin, jc.wXmax);
if (axis < numaxes)
pos[axis++] = -calcJoystickPos(ji.dwYpos, jc.wYmin, jc.wYmax);
if (axis < numaxes && jc.wCaps & JOYCAPS_HASZ)
pos[axis++] = calcJoystickPos(ji.dwZpos, jc.wZmin, jc.wZmax);
if (axis < numaxes && jc.wCaps & JOYCAPS_HASR)
pos[axis++] = calcJoystickPos(ji.dwRpos, jc.wRmin, jc.wRmax);
if (axis < numaxes && jc.wCaps & JOYCAPS_HASU)
pos[axis++] = calcJoystickPos(ji.dwUpos, jc.wUmin, jc.wUmax);
if (axis < numaxes && jc.wCaps & JOYCAPS_HASV)
pos[axis++] = -calcJoystickPos(ji.dwVpos, jc.wVmin, jc.wVmax);
return axis;
}
