From de2c5c33b72c993a4a7480fddea9f5cf91235129 Mon Sep 17 00:00:00 2001
From: Christoph Schied <[EMAIL REDACTED]>
Date: Thu, 24 Apr 2025 12:17:21 -0700
Subject: [PATCH] SDL_hidapi_steamdeck: report touch controller events
Previously, touchpad events were not reported to the application.
This patch exposes two touchpads and forwards x/y/pressure information
from the HIDAPI packet.
This fixes issue #12855
---
src/joystick/hidapi/SDL_hidapi_steamdeck.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/src/joystick/hidapi/SDL_hidapi_steamdeck.c b/src/joystick/hidapi/SDL_hidapi_steamdeck.c
index 75a13cc1b9215..213b2449e1799 100644
--- a/src/joystick/hidapi/SDL_hidapi_steamdeck.c
+++ b/src/joystick/hidapi/SDL_hidapi_steamdeck.c
@@ -233,6 +233,18 @@ static void HIDAPI_DriverSteamDeck_HandleState(SDL_HIDAPI_Device *device,
values[1] = (pInReport->payload.deckState.sAccelZ / 32768.0f) * 2.0f * SDL_STANDARD_GRAVITY;
values[2] = (-pInReport->payload.deckState.sAccelY / 32768.0f) * 2.0f * SDL_STANDARD_GRAVITY;
SDL_SendJoystickSensor(timestamp, joystick, SDL_SENSOR_ACCEL, ctx->sensor_timestamp_us, values, 3);
+
+ SDL_SendJoystickTouchpad(timestamp, joystick, 0, 0,
+ pInReport->payload.deckState.sPressurePadLeft > 0,
+ pInReport->payload.deckState.sLeftPadX / 65536.0f + 0.5f,
+ pInReport->payload.deckState.sLeftPadY / 65536.0f + 0.5f,
+ pInReport->payload.deckState.sPressurePadLeft / 32768.0f);
+
+ SDL_SendJoystickTouchpad(timestamp, joystick, 1, 0,
+ pInReport->payload.deckState.sPressurePadRight > 0,
+ pInReport->payload.deckState.sRightPadX / 65536.0f + 0.5f,
+ pInReport->payload.deckState.sRightPadY / 65536.0f + 0.5f,
+ pInReport->payload.deckState.sPressurePadRight / 32768.0f);
}
/*****************************************************************************************************/
@@ -366,6 +378,9 @@ static bool HIDAPI_DriverSteamDeck_OpenJoystick(SDL_HIDAPI_Device *device, SDL_J
SDL_PrivateJoystickAddSensor(joystick, SDL_SENSOR_GYRO, update_rate_in_hz);
SDL_PrivateJoystickAddSensor(joystick, SDL_SENSOR_ACCEL, update_rate_in_hz);
+ SDL_PrivateJoystickAddTouchpad(joystick, 1);
+ SDL_PrivateJoystickAddTouchpad(joystick, 1);
+
return true;
}