ebiten/example/blocks/game.go
2014-12-07 18:25:28 +09:00

83 lines
1.4 KiB
Go

package blocks
import (
"github.com/hajimehoshi/ebiten/graphics"
"sync"
)
type Size struct {
Width int
Height int
}
// TODO: Should they be global??
var texturePaths = map[string]string{}
var renderTargetSizes = map[string]Size{}
const ScreenWidth = 256
const ScreenHeight = 240
type GameState struct {
SceneManager *SceneManager
Input *Input
}
type Game struct {
sceneManager *SceneManager
input *Input
textures *Textures
}
func NewGame() *Game {
game := &Game{
sceneManager: NewSceneManager(NewTitleScene()),
input: NewInput(),
textures: NewTextures(),
}
return game
}
func (game *Game) isInitialized() bool {
for name := range texturePaths {
if !game.textures.Has(name) {
return false
}
}
for name := range renderTargetSizes {
if !game.textures.Has(name) {
return false
}
}
return true
}
var once sync.Once
func (game *Game) Update() error {
once.Do(func() {
for name, path := range texturePaths {
game.textures.RequestTexture(name, path)
}
for name, size := range renderTargetSizes {
game.textures.RequestRenderTarget(name, size)
}
})
if !game.isInitialized() {
return nil
}
game.input.Update()
game.sceneManager.Update(&GameState{
SceneManager: game.sceneManager,
Input: game.input,
})
return nil
}
func (game *Game) Draw(context graphics.Context) error {
if !game.isInitialized() {
return nil
}
game.sceneManager.Draw(context, game.textures)
return nil
}