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graphics: Stop CopyImage blocking on browsers

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This commit is contained in:
Hajime Hoshi 2016-12-27 01:57:15 +09:00
parent 3db15bc5bf
commit 006f87d02b
1 changed files with 4 additions and 1 deletions
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5
internal/graphics/image.go
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@ -18,6 +18,7 @@ import (
"image" "image"
"image/color" "image/color"
"image/draw" "image/draw"
"runtime"
"github.com/hajimehoshi/ebiten/internal/affine" "github.com/hajimehoshi/ebiten/internal/affine"
"github.com/hajimehoshi/ebiten/internal/opengl" "github.com/hajimehoshi/ebiten/internal/opengl"
@ -46,9 +47,10 @@ func CopyImage(origImg image.Image) *image.RGBA {
index1 := 0 index1 := 0
d0 := origImg.Stride - (x1 - x0) d0 := origImg.Stride - (x1 - x0)
d1 := newImg.Stride - (x1-x0)*4 d1 := newImg.Stride - (x1-x0)*4
pix := origImg.Pix
for j := 0; j < y1-y0; j++ { for j := 0; j < y1-y0; j++ {
for i := 0; i < x1-x0; i++ { for i := 0; i < x1-x0; i++ {
p := origImg.Pix[index0] p := pix[index0]
newImg.Pix[index1] = palette[4*p] newImg.Pix[index1] = palette[4*p]
newImg.Pix[index1+1] = palette[4*p+1] newImg.Pix[index1+1] = palette[4*p+1]
newImg.Pix[index1+2] = palette[4*p+2] newImg.Pix[index1+2] = palette[4*p+2]
@ -62,6 +64,7 @@ func CopyImage(origImg image.Image) *image.RGBA {
default: default:
draw.Draw(newImg, newImg.Bounds(), origImg, origImg.Bounds().Min, draw.Src) draw.Draw(newImg, newImg.Bounds(), origImg, origImg.Bounds().Min, draw.Src)
} }
runtime.Gosched()
return newImg return newImg
} }