ebiten/internal/input/input.go

// Copyright 2015 Hajime Hoshi
//
// 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.

package input

import (
	"github.com/hajimehoshi/ebiten/internal/driver"
)

var theInput = &Input{}

type pos struct {
	X int
	Y int
}

func Get() *Input {
	return theInput
}

func (i *Input) CursorPosition() (x, y int) {
	i.m.RLock()
	defer i.m.RUnlock()
	return i.cursorX, i.cursorY
}

func (i *Input) GamepadIDs() []int {
	i.m.RLock()
	defer i.m.RUnlock()
	if len(i.gamepads) == 0 {
		return nil
	}
	r := []int{}
	for id, g := range i.gamepads {
		if g.valid {
			r = append(r, id)
		}
	}
	return r
}

func (i *Input) GamepadAxisNum(id int) int {
	i.m.RLock()
	defer i.m.RUnlock()
	if len(i.gamepads) <= id {
		return 0
	}
	return i.gamepads[id].axisNum
}

func (i *Input) GamepadAxis(id int, axis int) float64 {
	i.m.RLock()
	defer i.m.RUnlock()
	if len(i.gamepads) <= id {
		return 0
	}
	return i.gamepads[id].axes[axis]
}

func (i *Input) GamepadButtonNum(id int) int {
	i.m.RLock()
	defer i.m.RUnlock()
	if len(i.gamepads) <= id {
		return 0
	}
	return i.gamepads[id].buttonNum
}

func (i *Input) IsGamepadButtonPressed(id int, button driver.GamepadButton) bool {
	i.m.RLock()
	defer i.m.RUnlock()
	if len(i.gamepads) <= id {
		return false
	}
	return i.gamepads[id].buttonPressed[button]
}

func (i *Input) TouchIDs() []int {
	i.m.RLock()
	defer i.m.RUnlock()

	if len(i.touches) == 0 {
		return nil
	}

	var ids []int
	for id := range i.touches {
		ids = append(ids, id)
	}
	return ids
}

func (i *Input) TouchPosition(id int) (x, y int) {
	i.m.RLock()
	defer i.m.RUnlock()

	for tid, pos := range i.touches {
		if id == tid {
			return pos.X, pos.Y
		}
	}
	return 0, 0
}

type gamePad struct {
	valid         bool
	axisNum       int
	axes          [16]float64
	buttonNum     int
	buttonPressed [256]bool
}