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SDL - added new SDL_JoystickCurrentPowerLevel() API that returns the battery level of the selected joystick. Currently only implemented for XInput devices, other platforms are a TODO.

Browse Source 
CR: Sam
This commit is contained in:
Sam Lantinga
2015-09-30 15:39:30 -07:00
parent c2f0394831
commit a0c4b56ff9
7 changed files with 127 additions and 8 deletions
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26
src/joystick/SDL_joystick.c
View File

@@ -178,6 +178,7 @@ SDL_JoystickOpen(int device_index)
if (joystick->buttons) {
SDL_memset(joystick->buttons, 0, joystick->nbuttons * sizeof(Uint8));
}
joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
/* Add joystick to list */
++joystick->ref_count;
@@ -619,10 +620,10 @@ SDL_PrivateJoystickButton(SDL_Joystick * joystick, Uint8 button, Uint8 state)
/* Make sure we're not getting garbage or duplicate events */
if (button >= joystick->nbuttons) {
return 0;
}
if (state == joystick->buttons[button]) {
return 0;
}
}
if (state == joystick->buttons[button]) {
return 0;
}
/* We ignore events if we don't have keyboard focus, except for button
* release. */
@@ -825,4 +826,21 @@ SDL_JoystickGUID SDL_JoystickGetGUIDFromString(const char *pchGUID)
}
/* update the power level for this joystick */
void SDL_PrivateJoystickBatteryLevel(SDL_Joystick * joystick, SDL_JoystickPowerLevel ePowerLevel)
{
joystick->epowerlevel = ePowerLevel;
}
/* return its power level */
SDL_JoystickPowerLevel SDL_JoystickCurrentPowerLevel(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (SDL_JOYSTICK_POWER_UNKNOWN);
}
return joystick->epowerlevel;
}
/* vi: set ts=4 sw=4 expandtab: */

2
src/joystick/SDL_joystick_c.h
View File

@@ -41,6 +41,8 @@ extern int SDL_PrivateJoystickHat(SDL_Joystick * joystick,
Uint8 hat, Uint8 value);
extern int SDL_PrivateJoystickButton(SDL_Joystick * joystick,
Uint8 button, Uint8 state);
extern void SDL_PrivateJoystickBatteryLevel( SDL_Joystick * joystick,
SDL_JoystickPowerLevel ePowerLevel );
/* Internal sanity checking functions */
extern int SDL_PrivateJoystickValid(SDL_Joystick * joystick);

1
src/joystick/SDL_sysjoystick.h
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@@ -54,6 +54,7 @@ struct _SDL_Joystick
int ref_count; /* Reference count for multiple opens */
SDL_bool force_recentering; /* SDL_TRUE if this device needs to have its state reset to 0 */
SDL_JoystickPowerLevel epowerlevel; /* power level of this joystick, SDL_JOYSTICK_POWER_UNKNOWN if not supported */
struct _SDL_Joystick *next; /* pointer to next joystick we have allocated */
};

50
src/joystick/windows/SDL_xinputjoystick.c
View File

@@ -221,8 +221,39 @@ SDL_XINPUT_JoystickOpen(SDL_Joystick * joystick, JoyStick_DeviceData *joystickde
return 0;
}
static void
UpdateXInputJoystickBatteryInformation(SDL_Joystick * joystick, XINPUT_BATTERY_INFORMATION *pBatteryInformation)
{
if ( pBatteryInformation->BatteryType != BATTERY_TYPE_UNKNOWN )
{
SDL_JoystickPowerLevel ePowerLevel = SDL_JOYSTICK_POWER_UNKNOWN;
if (pBatteryInformation->BatteryType == BATTERY_TYPE_WIRED) {
ePowerLevel = SDL_JOYSTICK_POWER_WIRED;
} else {
switch ( pBatteryInformation->BatteryLevel )
{
case BATTERY_LEVEL_EMPTY:
ePowerLevel = SDL_JOYSTICK_POWER_EMPTY;
break;
case BATTERY_LEVEL_LOW:
ePowerLevel = SDL_JOYSTICK_POWER_LOW;
break;
case BATTERY_LEVEL_MEDIUM:
ePowerLevel = SDL_JOYSTICK_POWER_MEDIUM;
break;
default:
case BATTERY_LEVEL_FULL:
ePowerLevel = SDL_JOYSTICK_POWER_FULL;
break;
}
}
SDL_PrivateJoystickBatteryLevel( joystick, ePowerLevel );
}
}
static void
UpdateXInputJoystickState_OLD(SDL_Joystick * joystick, XINPUT_STATE_EX *pXInputState)
UpdateXInputJoystickState_OLD(SDL_Joystick * joystick, XINPUT_STATE_EX *pXInputState, XINPUT_BATTERY_INFORMATION *pBatteryInformation)
{
static WORD s_XInputButtons[] = {
XINPUT_GAMEPAD_DPAD_UP, XINPUT_GAMEPAD_DPAD_DOWN, XINPUT_GAMEPAD_DPAD_LEFT, XINPUT_GAMEPAD_DPAD_RIGHT,
@@ -244,10 +275,12 @@ UpdateXInputJoystickState_OLD(SDL_Joystick * joystick, XINPUT_STATE_EX *pXInputS
for (button = 0; button < SDL_arraysize(s_XInputButtons); ++button) {
SDL_PrivateJoystickButton(joystick, button, (wButtons & s_XInputButtons[button]) ? SDL_PRESSED : SDL_RELEASED);
}
UpdateXInputJoystickBatteryInformation( joystick, pBatteryInformation );
}
static void
UpdateXInputJoystickState(SDL_Joystick * joystick, XINPUT_STATE_EX *pXInputState)
UpdateXInputJoystickState(SDL_Joystick * joystick, XINPUT_STATE_EX *pXInputState, XINPUT_BATTERY_INFORMATION *pBatteryInformation)
{
static WORD s_XInputButtons[] = {
XINPUT_GAMEPAD_A, XINPUT_GAMEPAD_B, XINPUT_GAMEPAD_X, XINPUT_GAMEPAD_Y,
@@ -283,6 +316,8 @@ UpdateXInputJoystickState(SDL_Joystick * joystick, XINPUT_STATE_EX *pXInputState
hat |= SDL_HAT_RIGHT;
}
SDL_PrivateJoystickHat(joystick, 0, hat);
UpdateXInputJoystickBatteryInformation( joystick, pBatteryInformation );
}
void
@@ -290,6 +325,7 @@ SDL_XINPUT_JoystickUpdate(SDL_Joystick * joystick)
{
HRESULT result;
XINPUT_STATE_EX XInputState;
XINPUT_BATTERY_INFORMATION XBatteryInformation;
if (!XINPUTGETSTATE)
return;
@@ -301,12 +337,18 @@ SDL_XINPUT_JoystickUpdate(SDL_Joystick * joystick)
return;
}
SDL_zero( XBatteryInformation );
if ( XINPUTGETBATTERYINFORMATION )
{
result = XINPUTGETBATTERYINFORMATION( joystick->hwdata->userid, BATTERY_DEVTYPE_GAMEPAD, &XBatteryInformation );
}
/* only fire events if the data changed from last time */
if (XInputState.dwPacketNumber && XInputState.dwPacketNumber != joystick->hwdata->dwPacketNumber) {
if (SDL_XInputUseOldJoystickMapping()) {
UpdateXInputJoystickState_OLD(joystick, &XInputState);
UpdateXInputJoystickState_OLD(joystick, &XInputState, &XBatteryInformation);
} else {
UpdateXInputJoystickState(joystick, &XInputState);
UpdateXInputJoystickState(joystick, &XInputState, &XBatteryInformation);
}
joystick->hwdata->dwPacketNumber = XInputState.dwPacketNumber;
}