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internal/buffered: refactoring

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This commit is contained in:
Hajime Hoshi 2022-03-20 19:03:41 +09:00
parent 14c327c89b
commit ea81d4abf4
1 changed files with 18 additions and 12 deletions
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26
internal/buffered/image.go
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@ -138,16 +138,25 @@ func (i *Image) MarkDisposed() {
i.img.MarkDisposed() i.img.MarkDisposed()
} }
func (i *Image) ensurePixels(graphicsDriver graphicsdriver.Graphics) error {
if i.pixels != nil {
return nil
}
pix, err := i.img.Pixels(graphicsDriver)
if err != nil {
return err
}
i.pixels = pix
return nil
}
func (img *Image) At(graphicsDriver graphicsdriver.Graphics, x, y int) (r, g, b, a byte, err error) { func (img *Image) At(graphicsDriver graphicsdriver.Graphics, x, y int) (r, g, b, a byte, err error) {
checkDelayedCommandsFlushed("At") checkDelayedCommandsFlushed("At")
if img.pixels == nil { if err := img.ensurePixels(graphicsDriver); err != nil {
pix, err := img.img.Pixels(graphicsDriver)
if err != nil {
return 0, 0, 0, 0, err return 0, 0, 0, 0, err
} }
img.pixels = pix
}
idx := 4 * (y*img.width + x) idx := 4 * (y*img.width + x)
return img.pixels[idx], img.pixels[idx+1], img.pixels[idx+2], img.pixels[idx+3], nil return img.pixels[idx], img.pixels[idx+1], img.pixels[idx+2], img.pixels[idx+3], nil
@ -199,13 +208,10 @@ func (i *Image) ReplacePartialPixels(graphicsDriver graphicsdriver.Graphics, pix
} }
} }
if i.pixels == nil { if err := i.ensurePixels(graphicsDriver); err != nil {
pix, err := i.img.Pixels(graphicsDriver)
if err != nil {
return err return err
} }
i.pixels = pix
}
i.replacePendingPixels(pix, x, y, width, height) i.replacePendingPixels(pix, x, y, width, height)
return nil return nil
} }