mirror of https://github.com/encounter/SDL.git
Fixed bug 4600 - Dualshock 4 touchpad press is not detectable with SDL_JoystickGetButton
Dexter Friedman When using a Dualshock 4 controller (model numbers CUH-ZCT1U and CUH-ZCT2U), pressing anywhere on the center touchpad does not send an SDL_JOYBUTTONDOWN event. I have verified this with testjoystick: Repro steps: 1. Plug in a DS4 over USB 2. Compile testjoystick and run: testjoystick.exe 0 3. Press and hold the touchpad. Observe that no lime green box appears Expected behavior: A lime green box appears while the touchpad is pressed. Notes: I've attached a patch here that works on my PC and produces the expected behavior in testjoystick, for both DS4 model numbers I listed earlier. If I understand correctly, by exposing this as a joystick button, the gamecontroller API mapping can be modified with a change to gamecontrollerdb.txt in the future.
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@ -360,7 +360,7 @@ HIDAPI_DriverPS4_OpenJoystick(SDL_HIDAPI_DriverData *context, SDL_Joystick *joys
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HIDAPI_DriverPS4_Rumble(context, joystick, 0, 0, 0);
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/* Initialize the joystick capabilities */
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joystick->nbuttons = SDL_CONTROLLER_BUTTON_MAX;
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joystick->nbuttons = 16;
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joystick->naxes = SDL_CONTROLLER_AXIS_MAX;
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joystick->epowerlevel = SDL_JOYSTICK_POWER_WIRED;
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@ -515,6 +515,7 @@ HIDAPI_DriverPS4_HandleStatePacket(SDL_Joystick *joystick, hid_device *dev, SDL_
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Uint8 data = (packet->rgucButtonsHatAndCounter[2] & 0x03);
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SDL_PrivateJoystickButton(joystick, SDL_CONTROLLER_BUTTON_GUIDE, (data & 0x01) ? SDL_PRESSED : SDL_RELEASED);
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SDL_PrivateJoystickButton(joystick, 15, (data & 0x02) ? SDL_PRESSED : SDL_RELEASED);
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}
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axis = ((int)packet->ucTriggerLeft * 257) - 32768;
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