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Allow floating point values for SDL_HINT_JOYSTICK_HIDAPI_SWITCH_HOME_LED

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This allows setting the brightness of the home LED on Nintendo Switch Pro controllers, in the range 0.0 - 1.0.

This can be updated at runtime by setting the hint dynamically.

Fixes https://github.com/libsdl-org/SDL/issues/3787
This commit is contained in:
Sam Lantinga 2022-07-25 11:26:18 -07:00
parent 1e492b2f6d
commit a423848ea0
1 changed files with 23 additions and 8 deletions
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31
src/joystick/hidapi/SDL_hidapi_switch.c
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@ -745,6 +745,24 @@ static SDL_bool SetHomeLED(SDL_DriverSwitch_Context *ctx, Uint8 brightness)
return WriteSubcommand(ctx, k_eSwitchSubcommandIDs_SetHomeLight, rgucBuffer, sizeof(rgucBuffer), NULL);
}
static void SDLCALL SDL_HomeLEDHintChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
SDL_DriverSwitch_Context *ctx = (SDL_DriverSwitch_Context *)userdata;
if (hint && *hint) {
int value;
if (SDL_strchr(hint, '.') != NULL) {
value = (int)(100.0f * SDL_atof(hint));
} else if (SDL_GetStringBoolean(hint, SDL_TRUE)) {
value = 100;
} else {
value = 0;
}
SetHomeLED(ctx, value);
}
}
static SDL_bool SetSlotLED(SDL_DriverSwitch_Context *ctx, Uint8 slot)
{
Uint8 led_data = (1 << slot);
@ -1066,14 +1084,8 @@ HIDAPI_DriverSwitch_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joysti
/* Set the LED state */
if (ctx->m_bHasHomeLED) {
const char *hint = SDL_GetHint(SDL_HINT_JOYSTICK_HIDAPI_SWITCH_HOME_LED);
if (hint && *hint) {
if (SDL_GetStringBoolean(hint, SDL_TRUE)) {
SetHomeLED(ctx, 100);
} else {
SetHomeLED(ctx, 0);
}
}
SDL_AddHintCallback(SDL_HINT_JOYSTICK_HIDAPI_SWITCH_HOME_LED,
SDL_HomeLEDHintChanged, ctx);
}
SetSlotLED(ctx, (joystick->instance_id % 4));
@ -1654,6 +1666,9 @@ HIDAPI_DriverSwitch_CloseJoystick(SDL_HIDAPI_Device *device, SDL_Joystick *joyst
SDL_DelHintCallback(SDL_HINT_GAMECONTROLLER_USE_BUTTON_LABELS,
SDL_GameControllerButtonReportingHintChanged, ctx);
SDL_DelHintCallback(SDL_HINT_JOYSTICK_HIDAPI_SWITCH_HOME_LED,
SDL_HomeLEDHintChanged, ctx);
SDL_LockMutex(device->dev_lock);
{
SDL_hid_close(device->dev);