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internal/buffer: refactoring

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This commit is contained in:
Hajime Hoshi 2023-02-26 02:19:38 +09:00
parent 110ba5403d
commit c48d0fbb7a
1 changed files with 4 additions and 17 deletions
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21
internal/buffered/image.go
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@ -16,7 +16,6 @@ package buffered
import (
"fmt"
"image"
"github.com/hajimehoshi/ebiten/v2/internal/atlas"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
@ -93,14 +92,6 @@ func (i *Image) markDisposedImpl() {
func (i *Image) ReadPixels(graphicsDriver graphicsdriver.Graphics, pixels []byte, x, y, width, height int) error {
checkDelayedCommandsFlushed("ReadPixels")
r := image.Rect(x, y, x+width, y+height).Intersect(image.Rect(0, 0, i.width, i.height))
if r.Empty() {
for i := range pixels {
pixels[i] = 0
}
return nil
}
// If restorable.AlwaysReadPixelsFromGPU() returns false, the pixel data is cached in the restorable package.
if !restorable.AlwaysReadPixelsFromGPU() {
if err := i.img.ReadPixels(graphicsDriver, pixels, x, y, width, height); err != nil {
@ -117,14 +108,10 @@ func (i *Image) ReadPixels(graphicsDriver graphicsdriver.Graphics, pixels []byte
i.pixels = pix
}
dstBaseX := r.Min.X - x
dstBaseY := r.Min.Y - y
srcBaseX := r.Min.X
srcBaseY := r.Min.Y
lineWidth := 4 * r.Dx()
for j := 0; j < r.Dy(); j++ {
dstX := 4 * ((dstBaseY+j)*width + dstBaseX)
srcX := 4 * ((srcBaseY+j)*i.width + srcBaseX)
lineWidth := 4 * width
for j := 0; j < height; j++ {
dstX := 4 * j * width
srcX := 4 * ((y+j)*i.width + x)
copy(pixels[dstX:dstX+lineWidth], i.pixels[srcX:srcX+lineWidth])
}
return nil