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e2f26b9dac
On Android, MotionEvent with 0 values might come for axes when connecting a gamepad, even though a user didn't touch any axes. This is problematic especially for tirgger axes, where the default value should be -1. This change fixes the issue by adding a new state `axesReady` to check if an axis is really touched or not. If an axis is not touched yet, a button value for a standard (trigger) button always returns 0. This change also removes an old hack to initialize axis values for triggers. Closes #2598
443 lines
18 KiB
Java
443 lines
18 KiB
Java
// Copyright 2022 The Ebitengine Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package {{.JavaPkg}}.{{.PrefixLower}};
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import android.content.Context;
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import android.hardware.input.InputManager;
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import android.os.Handler;
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import android.os.Looper;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.util.Log;
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import android.view.Display;
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import android.view.KeyEvent;
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import android.view.InputDevice;
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import android.view.MotionEvent;
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import android.view.ViewGroup;
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import android.view.WindowManager;
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import {{.JavaPkg}}.ebitenmobileview.Ebitenmobileview;
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public class EbitenView extends ViewGroup implements InputManager.InputDeviceListener {
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static class Gamepad {
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public int deviceId;
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public ArrayList<InputDevice.MotionRange> axes;
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public ArrayList<InputDevice.MotionRange> hats;
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}
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// See https://github.com/libsdl-org/SDL/blob/2df2da11f627299c6e05b7e0aff407c915043372/android-project/app/src/main/java/org/libsdl/app/SDLControllerManager.java#L154-L173
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static class RangeComparator implements Comparator<InputDevice.MotionRange> {
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@Override
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public int compare(InputDevice.MotionRange arg0, InputDevice.MotionRange arg1) {
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int arg0Axis = arg0.getAxis();
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int arg1Axis = arg1.getAxis();
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if (arg0Axis == MotionEvent.AXIS_GAS) {
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arg0Axis = MotionEvent.AXIS_BRAKE;
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} else if (arg0Axis == MotionEvent.AXIS_BRAKE) {
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arg0Axis = MotionEvent.AXIS_GAS;
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}
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if (arg1Axis == MotionEvent.AXIS_GAS) {
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arg1Axis = MotionEvent.AXIS_BRAKE;
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} else if (arg1Axis == MotionEvent.AXIS_BRAKE) {
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arg1Axis = MotionEvent.AXIS_GAS;
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}
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// Make sure the AXIS_Z is sorted between AXIS_RY and AXIS_RZ.
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//
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// The value ordering on Android otherwise is AXIS_X, AXIS_Y,
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// all kinds of axes used by touchscreens or touchpads only,
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// AXIS_Z, AXIS_RX, AXIS_RY, AXIS_RZ, hats, triggers,
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// flight controls, car controls, misc stuff.
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//
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// This is because the usual pairing are:
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// - AXIS_X, AXIS_Y (left stick).
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// - AXIS_RX, AXIS_RY (sometimes the right stick, sometimes triggers).
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// - AXIS_Z, AXIS_RZ (sometimes the right stick, sometimes triggers).
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//
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// This sorts the axes in the above order, which tends to be correct
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// for Xbox-ish game pads that have the right stick on RX/RY and the
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// triggers on Z/RZ.
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//
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// Gamepads that don't have AXIS_Z/AXIS_RZ but use
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// AXIS_LTRIGGER/AXIS_RTRIGGER are unaffected by this.
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//
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// References:
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// - https://developer.android.com/develop/ui/views/touch-and-input/game-controllers/controller-input
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// - https://www.kernel.org/doc/html/latest/input/gamepad.html
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if (arg0Axis == MotionEvent.AXIS_Z) {
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arg0Axis = MotionEvent.AXIS_RZ - 1;
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} else if (arg0Axis > MotionEvent.AXIS_Z && arg0Axis < MotionEvent.AXIS_RZ) {
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arg0Axis--;
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}
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if (arg1Axis == MotionEvent.AXIS_Z) {
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arg1Axis = MotionEvent.AXIS_RZ - 1;
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} else if (arg1Axis > MotionEvent.AXIS_Z && arg1Axis < MotionEvent.AXIS_RZ) {
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arg1Axis--;
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}
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return arg0Axis - arg1Axis;
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}
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}
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private static double pxToDp(double x) {
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return x / Ebitenmobileview.deviceScale();
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}
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public EbitenView(Context context) {
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super(context);
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initialize(context);
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}
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public EbitenView(Context context, AttributeSet attrs) {
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super(context, attrs);
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initialize(context);
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}
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private void initialize(Context context) {
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this.gamepads = new ArrayList<Gamepad>();
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this.ebitenSurfaceView = new EbitenSurfaceView(getContext());
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LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
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addView(this.ebitenSurfaceView, params);
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this.inputManager = (InputManager)context.getSystemService(Context.INPUT_SERVICE);
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this.inputManager.registerInputDeviceListener(this, null);
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for (int id : this.inputManager.getInputDeviceIds()) {
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this.onInputDeviceAdded(id);
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}
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}
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@Override
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protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
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this.ebitenSurfaceView.layout(0, 0, right - left, bottom - top);
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double widthInDp = pxToDp(right - left);
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double heightInDp = pxToDp(bottom - top);
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Ebitenmobileview.layout(widthInDp, heightInDp);
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}
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@Override
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public boolean onKeyDown(int keyCode, KeyEvent event) {
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Ebitenmobileview.onKeyDownOnAndroid(keyCode, event.getUnicodeChar(), event.getSource(), event.getDeviceId());
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return true;
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}
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@Override
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public boolean onKeyUp(int keyCode, KeyEvent event) {
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Ebitenmobileview.onKeyUpOnAndroid(keyCode, event.getSource(), event.getDeviceId());
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return true;
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}
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@Override
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public boolean onTouchEvent(MotionEvent e) {
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// getActionIndex returns a valid value only for the action whose index is the returned value of getActionIndex (#2220).
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// See https://developer.android.com/reference/android/view/MotionEvent#getActionMasked().
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// For other pointers, treat their actions as MotionEvent.ACTION_MOVE.
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int touchIndex = e.getActionIndex();
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for (int i = 0; i < e.getPointerCount(); i++) {
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int id = e.getPointerId(i);
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int x = (int)e.getX(i);
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int y = (int)e.getY(i);
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int action = (i == touchIndex) ? e.getActionMasked() : MotionEvent.ACTION_MOVE;
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Ebitenmobileview.updateTouchesOnAndroid(action, id, (int)pxToDp(x), (int)pxToDp(y));
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}
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return true;
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}
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private Gamepad getGamepad(int deviceId) {
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for (Gamepad gamepad : this.gamepads) {
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if (gamepad.deviceId == deviceId) {
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return gamepad;
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}
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}
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return null;
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}
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@Override
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public boolean onGenericMotionEvent(MotionEvent event) {
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if ((event.getSource() & InputDevice.SOURCE_JOYSTICK) != InputDevice.SOURCE_JOYSTICK) {
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return super.onGenericMotionEvent(event);
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}
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if (event.getAction() != MotionEvent.ACTION_MOVE) {
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return super.onGenericMotionEvent(event);
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}
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// See https://github.com/libsdl-org/SDL/blob/2df2da11f627299c6e05b7e0aff407c915043372/android-project/app/src/main/java/org/libsdl/app/SDLControllerManager.java#L256-L277
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Gamepad gamepad = this.getGamepad(event.getDeviceId());
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if (gamepad == null) {
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return true;
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}
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int actionPointerIndex = event.getActionIndex();
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for (int i = 0; i < gamepad.axes.size(); i++) {
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InputDevice.MotionRange range = gamepad.axes.get(i);
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float axisValue = event.getAxisValue(range.getAxis(), actionPointerIndex);
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float value = (axisValue - range.getMin()) / range.getRange() * 2.0f - 1.0f;
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Ebitenmobileview.onGamepadAxisChanged(gamepad.deviceId, i, value);
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}
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for (int i = 0; i < gamepad.hats.size() / 2; i++) {
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int hatX = Math.round(event.getAxisValue(gamepad.hats.get(2*i).getAxis(), actionPointerIndex));
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int hatY = Math.round(event.getAxisValue(gamepad.hats.get(2*i+1).getAxis(), actionPointerIndex));
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Ebitenmobileview.onGamepadHatChanged(gamepad.deviceId, i, hatX, hatY);
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}
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return true;
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}
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@Override
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public void onInputDeviceAdded(int deviceId) {
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InputDevice inputDevice = this.inputManager.getInputDevice(deviceId);
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// The InputDevice can be null on some deivces (#1342).
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if (inputDevice == null) {
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return;
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}
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// A fingerprint reader is unexpectedly recognized as a joystick. Skip this (#1542).
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if (inputDevice.getName().equals("uinput-fpc")) {
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return;
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}
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int sources = inputDevice.getSources();
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if ((sources & InputDevice.SOURCE_GAMEPAD) != InputDevice.SOURCE_GAMEPAD &&
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(sources & InputDevice.SOURCE_JOYSTICK) != InputDevice.SOURCE_JOYSTICK) {
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return;
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}
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// See https://github.com/libsdl-org/SDL/blob/2df2da11f627299c6e05b7e0aff407c915043372/android-project/app/src/main/java/org/libsdl/app/SDLControllerManager.java#L182-L216
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List<InputDevice.MotionRange> ranges = inputDevice.getMotionRanges();
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Collections.sort(ranges, new RangeComparator());
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Gamepad gamepad = new Gamepad();
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gamepad.deviceId = deviceId;
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gamepad.axes = new ArrayList<InputDevice.MotionRange>();
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gamepad.hats = new ArrayList<InputDevice.MotionRange>();
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for (InputDevice.MotionRange range : ranges) {
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if (range.getAxis() == MotionEvent.AXIS_HAT_X || range.getAxis() == MotionEvent.AXIS_HAT_Y) {
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gamepad.hats.add(range);
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} else {
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gamepad.axes.add(range);
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}
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}
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this.gamepads.add(gamepad);
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String descriptor = inputDevice.getDescriptor();
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int vendorId = inputDevice.getVendorId();
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int productId = inputDevice.getProductId();
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// These values are required to calculate SDL's GUID.
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int buttonMask = getButtonMask(inputDevice, gamepad.hats.size()/2);
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int axisMask = getAxisMask(inputDevice);
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Ebitenmobileview.onGamepadAdded(deviceId, inputDevice.getName(), gamepad.axes.size(), gamepad.hats.size()/2, descriptor, vendorId, productId, buttonMask, axisMask);
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}
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// The implementation is copied from SDL:
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// https://github.com/libsdl-org/SDL/blob/0e9560aea22818884921e5e5064953257bfe7fa7/android-project/app/src/main/java/org/libsdl/app/SDLControllerManager.java#L308
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private static int getButtonMask(InputDevice joystickDevice, int nhats) {
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int buttonMask = 0;
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int[] keys = new int[] {
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KeyEvent.KEYCODE_BUTTON_A,
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KeyEvent.KEYCODE_BUTTON_B,
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KeyEvent.KEYCODE_BUTTON_X,
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KeyEvent.KEYCODE_BUTTON_Y,
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KeyEvent.KEYCODE_BACK,
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KeyEvent.KEYCODE_BUTTON_MODE,
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KeyEvent.KEYCODE_BUTTON_START,
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KeyEvent.KEYCODE_BUTTON_THUMBL,
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KeyEvent.KEYCODE_BUTTON_THUMBR,
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KeyEvent.KEYCODE_BUTTON_L1,
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KeyEvent.KEYCODE_BUTTON_R1,
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KeyEvent.KEYCODE_DPAD_UP,
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KeyEvent.KEYCODE_DPAD_DOWN,
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KeyEvent.KEYCODE_DPAD_LEFT,
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KeyEvent.KEYCODE_DPAD_RIGHT,
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KeyEvent.KEYCODE_BUTTON_SELECT,
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KeyEvent.KEYCODE_DPAD_CENTER,
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// These don't map into any SDL controller buttons directly
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KeyEvent.KEYCODE_BUTTON_L2,
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KeyEvent.KEYCODE_BUTTON_R2,
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KeyEvent.KEYCODE_BUTTON_C,
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KeyEvent.KEYCODE_BUTTON_Z,
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KeyEvent.KEYCODE_BUTTON_1,
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KeyEvent.KEYCODE_BUTTON_2,
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KeyEvent.KEYCODE_BUTTON_3,
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KeyEvent.KEYCODE_BUTTON_4,
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KeyEvent.KEYCODE_BUTTON_5,
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KeyEvent.KEYCODE_BUTTON_6,
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KeyEvent.KEYCODE_BUTTON_7,
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KeyEvent.KEYCODE_BUTTON_8,
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KeyEvent.KEYCODE_BUTTON_9,
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KeyEvent.KEYCODE_BUTTON_10,
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KeyEvent.KEYCODE_BUTTON_11,
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KeyEvent.KEYCODE_BUTTON_12,
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KeyEvent.KEYCODE_BUTTON_13,
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KeyEvent.KEYCODE_BUTTON_14,
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KeyEvent.KEYCODE_BUTTON_15,
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KeyEvent.KEYCODE_BUTTON_16,
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};
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int[] masks = new int[] {
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(1 << 0), // A -> A
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(1 << 1), // B -> B
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(1 << 2), // X -> X
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(1 << 3), // Y -> Y
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(1 << 4), // BACK -> BACK
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(1 << 5), // MODE -> GUIDE
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(1 << 6), // START -> START
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(1 << 7), // THUMBL -> LEFTSTICK
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(1 << 8), // THUMBR -> RIGHTSTICK
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(1 << 9), // L1 -> LEFTSHOULDER
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(1 << 10), // R1 -> RIGHTSHOULDER
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(1 << 11), // DPAD_UP -> DPAD_UP
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(1 << 12), // DPAD_DOWN -> DPAD_DOWN
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(1 << 13), // DPAD_LEFT -> DPAD_LEFT
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(1 << 14), // DPAD_RIGHT -> DPAD_RIGHT
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(1 << 4), // SELECT -> BACK
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(1 << 0), // DPAD_CENTER -> A
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(1 << 15), // L2 -> ??
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(1 << 16), // R2 -> ??
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(1 << 17), // C -> ??
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(1 << 18), // Z -> ??
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(1 << 20), // 1 -> ??
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(1 << 21), // 2 -> ??
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(1 << 22), // 3 -> ??
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(1 << 23), // 4 -> ??
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(1 << 24), // 5 -> ??
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(1 << 25), // 6 -> ??
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(1 << 26), // 7 -> ??
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(1 << 27), // 8 -> ??
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(1 << 28), // 9 -> ??
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(1 << 29), // 10 -> ??
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(1 << 30), // 11 -> ??
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(1 << 31), // 12 -> ??
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// We're out of room...
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0xFFFFFFFF, // 13 -> ??
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0xFFFFFFFF, // 14 -> ??
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0xFFFFFFFF, // 15 -> ??
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0xFFFFFFFF, // 16 -> ??
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};
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boolean[] hasKeys = joystickDevice.hasKeys(keys);
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for (int i = 0; i < keys.length; ++i) {
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if (hasKeys[i]) {
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buttonMask |= masks[i];
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}
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}
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// https://github.com/libsdl-org/SDL/blob/47f2373dc13b66c48bf4024fcdab53cd0bdd59bb/src/joystick/android/SDL_sysjoystick.c#L360-L367
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if (nhats > 0) {
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// Add Dpad buttons.
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buttonMask |= 1 << 11;
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buttonMask |= 1 << 12;
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buttonMask |= 1 << 13;
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buttonMask |= 1 << 14;
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}
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return buttonMask;
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}
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private static int getAxisMask(InputDevice joystickDevice) {
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final int SDL_CONTROLLER_AXIS_LEFTX = 0;
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final int SDL_CONTROLLER_AXIS_LEFTY = 1;
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final int SDL_CONTROLLER_AXIS_RIGHTX = 2;
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final int SDL_CONTROLLER_AXIS_RIGHTY = 3;
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final int SDL_CONTROLLER_AXIS_TRIGGERLEFT = 4;
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final int SDL_CONTROLLER_AXIS_TRIGGERRIGHT = 5;
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int naxes = 0;
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boolean haveZ = false;
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boolean havePastZBeforeRZ = false;
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for (InputDevice.MotionRange range : joystickDevice.getMotionRanges()) {
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if ((range.getSource() & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) {
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int axis = range.getAxis();
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if (axis != MotionEvent.AXIS_HAT_X && axis != MotionEvent.AXIS_HAT_Y) {
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naxes++;
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}
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if (axis == MotionEvent.AXIS_Z) {
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haveZ = true;
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} else if (axis > MotionEvent.AXIS_Z && axis < MotionEvent.AXIS_RZ) {
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havePastZBeforeRZ = true;
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}
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}
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}
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// The variable is_accelerometer seems always false, then skip the checking:
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// https://github.com/libsdl-org/SDL/blob/0e9560aea22818884921e5e5064953257bfe7fa7/android-project/app/src/main/java/org/libsdl/app/SDLControllerManager.java#L207
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int axisMask = 0;
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if (naxes >= 2) {
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axisMask |= ((1 << SDL_CONTROLLER_AXIS_LEFTX) | (1 << SDL_CONTROLLER_AXIS_LEFTY));
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}
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if (naxes >= 4) {
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axisMask |= ((1 << SDL_CONTROLLER_AXIS_RIGHTX) | (1 << SDL_CONTROLLER_AXIS_RIGHTY));
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}
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if (naxes >= 6) {
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axisMask |= ((1 << SDL_CONTROLLER_AXIS_TRIGGERLEFT) | (1 << SDL_CONTROLLER_AXIS_TRIGGERRIGHT));
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}
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// Also add an indicator bit for whether the sorting order has changed.
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// This serves to disable outdated gamecontrollerdb.txt mappings.
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if (haveZ && havePastZBeforeRZ) {
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axisMask |= 0x8000;
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}
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return axisMask;
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}
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@Override
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public void onInputDeviceChanged(int deviceId) {
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// Do nothing.
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}
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@Override
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public void onInputDeviceRemoved(int deviceId) {
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// Do not call inputManager.getInputDevice(), which returns null (#1185).
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Ebitenmobileview.onInputDeviceRemoved(deviceId);
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this.gamepads.remove(this.getGamepad(deviceId));
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}
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// suspendGame suspends the game.
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// It is recommended to call this when the application is being suspended e.g.,
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// Activity's onPause is called.
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public void suspendGame() {
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this.inputManager.unregisterInputDeviceListener(this);
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this.ebitenSurfaceView.onPause();
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try {
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Ebitenmobileview.suspend();
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} catch (final Exception e) {
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onErrorOnGameUpdate(e);
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}
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}
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// resumeGame resumes the game.
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// It is recommended to call this when the application is being resumed e.g.,
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// Activity's onResume is called.
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public void resumeGame() {
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this.inputManager.registerInputDeviceListener(this, null);
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this.ebitenSurfaceView.onResume();
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try {
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Ebitenmobileview.resume();
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} catch (final Exception e) {
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onErrorOnGameUpdate(e);
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}
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}
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// onErrorOnGameUpdate is called on the main thread when an error happens when updating a game.
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// You can define your own error handler, e.g., using Crashlytics, by overriding this method.
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protected void onErrorOnGameUpdate(Exception e) {
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Log.e("Go", e.toString());
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}
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private EbitenSurfaceView ebitenSurfaceView;
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private InputManager inputManager;
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private ArrayList<Gamepad> gamepads;
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}
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