ebiten/mobile/run.go
2016-05-28 23:15:28 +09:00

123 lines
2.7 KiB
Go

// Copyright 2016 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.
// +build android
package mobile
import (
"errors"
"runtime"
"github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/internal/ui"
)
var chError <-chan error
type EventDispatcher interface {
SetScreenSize(width, height int)
SetScreenScale(scale int)
Render() error
Pause()
Resume()
TouchDown(id int, x, y int)
TouchMove(id int, x, y int)
TouchUp(id int)
}
// Start starts the game and returns immediately.
//
// Different from ebiten.Run, this invokes only the game loop and not the main (UI) loop.
func Start(f func(*ebiten.Image) error, width, height, scale int, title string) (EventDispatcher, error) {
chError = ebiten.RunWithoutMainLoop(f, width, height, scale, title)
return &eventDispatcher{
touches: map[int]position{},
}, nil
}
type position struct {
x int
y int
}
type eventDispatcher struct {
touches map[int]position
}
func (e *eventDispatcher) SetScreenSize(width, height int) {
ui.CurrentUI().SetScreenSize(width, height)
}
func (e *eventDispatcher) SetScreenScale(scale int) {
ui.CurrentUI().SetScreenScale(scale)
}
func (e *eventDispatcher) Render() error {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
if chError == nil {
return errors.New("mobile: chError must not be nil: Start is not called yet?")
}
return ui.Render(chError)
}
func (e *eventDispatcher) Pause() {
ui.Pause()
}
func (e *eventDispatcher) Resume() {
ui.Resume()
}
// touch implements ui.Touch.
type touch struct {
id int
position position
}
func (t touch) ID() int {
return t.id
}
func (t touch) Position() (int, int) {
// TODO: Is this OK to adjust the position here?
return t.position.x / ui.CurrentUI().ScreenScale(),
t.position.y / ui.CurrentUI().ScreenScale()
}
func (e *eventDispatcher) TouchDown(id int, x, y int) {
e.touches[id] = position{x, y}
e.updateTouches()
}
func (e *eventDispatcher) TouchMove(id int, x, y int) {
e.touches[id] = position{x, y}
e.updateTouches()
}
func (e *eventDispatcher) TouchUp(id int) {
delete(e.touches, id)
e.updateTouches()
}
func (e *eventDispatcher) updateTouches() {
ts := []ui.Touch{}
for id, position := range e.touches {
ts = append(ts, touch{id, position})
}
ui.UpdateTouches(ts)
}