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image.go
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image.go
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package gdi
import (
"image"
"image/draw"
"github.com/hajimehoshi/ebiten/v2"
)
type Image struct {
ebiImg *ebiten.Image
img *image.RGBA
}
func NewImageSize(width, height int) Image {
return Image{
ebiImg: ebiten.NewImage(width, height),
img: nil,
}
}
func NewImageFrom(img image.Image) Image {
rgba, ok := img.(*image.RGBA)
if !ok {
bounds := img.Bounds()
bounds.Sub(bounds.Min)
rgba = image.NewRGBA(bounds)
draw.Draw(rgba, bounds, img, img.Bounds().Min, draw.Src)
}
ebiImg := ebiten.NewImageFromImage(rgba)
return Image{ebiImg, rgba}
}
func (i Image) Ebiten() *ebiten.Image {
return i.ebiImg
}
func (i Image) Origin() *image.RGBA {
return i.img
}
func (i Image) IsValid() bool {
return i.ebiImg != nil
}
func (i Image) Bounds() image.Rectangle {
return i.ebiImg.Bounds()
}
func (i Image) Size() (width, height int) {
return i.ebiImg.Size()
}
func (i Image) SubImage(rect image.Rectangle) Image {
var sub *ebiten.Image
var originSub *image.RGBA
if img := i.ebiImg.SubImage(rect); img != nil {
sub = img.(*ebiten.Image)
}
if img := i.img; img != nil {
originSub = i.img.SubImage(rect).(*image.RGBA)
}
return Image{sub, originSub}
}