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groovy/examples/splashmenu/splash.go

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package splashmenu
import (
"image/color"
"log"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/examples/resources/fonts"
"github.com/hajimehoshi/ebiten/v2/text"
"golang.org/x/image/font"
"golang.org/x/image/font/opentype"
)
var (
splashFont font.Face
)
func init() {
tt, err := opentype.Parse(fonts.PressStart2P_ttf)
if err != nil {
log.Fatal(err)
}
const dpi = 72
splashFont, err = opentype.NewFace(tt, &opentype.FaceOptions{
Size: 12,
DPI: dpi,
Hinting: font.HintingVertical,
})
if err != nil {
log.Fatal(err)
}
}
type Splash struct {
bgcolor color.RGBA
completed bool
increment int
}
func NewSplash() Splash {
return Splash{
bgcolor: color.RGBA{0xFF, 0xFF, 0xFF, 0xFF},
completed: false,
}
}
func (s *Splash) Draw(screen *ebiten.Image) {
screen.Fill(s.bgcolor)
text.Draw(screen, "splash", splashFont, 40, 40, color.White)
}
func (s *Splash) Update() error {
s.increment++
s.bgcolor.R = (s.bgcolor.R - 2) % 0xFF
s.bgcolor.G = (s.bgcolor.G - 2) % 0xFF
s.bgcolor.B = (s.bgcolor.B - 2) % 0xFF
if s.bgcolor.R == 0x00 {
s.completed = true
}
return nil
}
func (s *Splash) Completed() bool {
return s.completed
}