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example/sprites: Speed optimization

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This commit is contained in:
Hajime Hoshi 2015-01-17 00:33:52 +09:00
parent 8564ba8541
commit 952f6be822
1 changed files with 5 additions and 7 deletions
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12
example/sprites/main.go
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@ -29,7 +29,9 @@ const (
) )
var ( var (
ebitenImage *ebiten.Image ebitenImage *ebiten.Image
ebitenImageWidth = 0
ebitenImageHeight = 0
) )
type Sprite struct { type Sprite struct {
@ -67,11 +69,6 @@ func (s *Sprite) Dst() (x0, y0, x1, y1 int) {
return s.x, s.y, s.x + w, s.y + h return s.x, s.y, s.x + w, s.y + h
} }
func (s *Sprite) Src() (x0, y0, x1, y1 int) {
w, h := s.image.Size()
return 0, 0, w, h
}
type Sprites []*Sprite type Sprites []*Sprite
func (s Sprites) Update() { func (s Sprites) Update() {
@ -89,7 +86,7 @@ func (s Sprites) Dst(i int) (x0, y0, x1, y1 int) {
} }
func (s Sprites) Src(i int) (x0, y0, x1, y1 int) { func (s Sprites) Src(i int) (x0, y0, x1, y1 int) {
return s[i].Src() return 0, 0, ebitenImageWidth, ebitenImageHeight
} }
var sprites = make(Sprites, 10000) var sprites = make(Sprites, 10000)
@ -113,6 +110,7 @@ func main() {
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)
} }
ebitenImageWidth, ebitenImageHeight = ebitenImage.Size()
for i, _ := range sprites { for i, _ := range sprites {
w, h := ebitenImage.Size() w, h := ebitenImage.Size()
x, y := rand.Intn(screenWidth-w), rand.Intn(screenHeight-h) x, y := rand.Intn(screenWidth-w), rand.Intn(screenHeight-h)