ebiten/internal/uidriver/mobile/gamepad.go

// Copyright 2022 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//go:build android || ios
// +build android ios

package mobile

import (
	"time"

	"github.com/hajimehoshi/ebiten/v2/internal/driver"
	"github.com/hajimehoshi/ebiten/v2/internal/gamepaddb"
)

type Gamepad struct {
	ID        driver.GamepadID
	SDLID     string
	Name      string
	Buttons   [driver.GamepadButtonNum]bool
	ButtonNum int
	Axes      [32]float32
	AxisNum   int
	Hats      [16]int
	HatNum    int
}

type gamepadState struct {
	g *Gamepad
}

func (s gamepadState) Axis(index int) float64 {
	return float64(s.g.Axes[index])
}

func (s gamepadState) Button(index int) bool {
	return s.g.Buttons[index]
}

func (s gamepadState) Hat(index int) int {
	return s.g.Hats[index]
}

func (i *Input) AppendGamepadIDs(gamepadIDs []driver.GamepadID) []driver.GamepadID {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		gamepadIDs = append(gamepadIDs, g.ID)
	}
	return gamepadIDs
}

func (i *Input) GamepadSDLID(id driver.GamepadID) string {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		return g.SDLID
	}
	return ""
}

func (i *Input) GamepadName(id driver.GamepadID) string {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		if name := gamepaddb.Name(g.SDLID); name != "" {
			return name
		}
		return g.Name
	}
	return ""
}

func (i *Input) GamepadAxisNum(id driver.GamepadID) int {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		return g.AxisNum
	}
	return 0
}

func (i *Input) GamepadAxisValue(id driver.GamepadID, axis int) float64 {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		if g.AxisNum <= int(axis) {
			return 0
		}
		return float64(g.Axes[axis])
	}
	return 0
}

func (i *Input) GamepadButtonNum(id driver.GamepadID) int {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		return g.ButtonNum
	}
	return 0
}

func (i *Input) IsGamepadButtonPressed(id driver.GamepadID, button driver.GamepadButton) bool {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		if g.ButtonNum <= int(button) {
			return false
		}
		return g.Buttons[button]
	}
	return false
}

func (i *Input) IsStandardGamepadLayoutAvailable(id driver.GamepadID) bool {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		return gamepaddb.HasStandardLayoutMapping(g.SDLID)
	}
	return false
}

func (i *Input) IsStandardGamepadButtonPressed(id driver.GamepadID, button driver.StandardGamepadButton) bool {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		return gamepaddb.IsButtonPressed(g.SDLID, button, gamepadState{&g})
	}
	return false
}

func (i *Input) StandardGamepadButtonValue(id driver.GamepadID, button driver.StandardGamepadButton) float64 {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		return gamepaddb.ButtonValue(g.SDLID, button, gamepadState{&g})
	}
	return 0
}

func (i *Input) StandardGamepadAxisValue(id driver.GamepadID, axis driver.StandardGamepadAxis) float64 {
	i.ui.m.RLock()
	defer i.ui.m.RUnlock()

	for _, g := range i.gamepads {
		if g.ID != id {
			continue
		}
		return gamepaddb.AxisValue(g.SDLID, axis, gamepadState{&g})
	}
	return 0
}

func (i *Input) VibrateGamepad(id driver.GamepadID, duration time.Duration, strongMagnitude float64, weakMagnitude float64) {
	// TODO: Implement this (#1452)
}