ebiten/mobile/ebitenmobileview/game.go

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// Copyright 2019 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.
package ebitenmobileview
import (
"sync"
"github.com/hajimehoshi/ebiten"
)
var theState state
// game is not exported since gomobile complains.
// TODO: Report this error.
type game interface {
Update(*ebiten.Image) error
Layout(viewWidth, viewHeight int) (screenWidth, screenHeight int)
}
type state struct {
game game
running bool
delayedLayout func()
// m is a mutex required for each function.
// For example, on Android, Update can be called from a different thread:
// https://developer.android.com/reference/android/opengl/GLSurfaceView.Renderer
m sync.Mutex
}
func SetGame(game game) {
theState.m.Lock()
defer theState.m.Unlock()
theState.game = game
if theState.delayedLayout != nil {
theState.delayedLayout()
theState.delayedLayout = nil
}
}