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add func ToImage: convert C.MMBitmapRef to standard image.Image

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This commit is contained in:
rocket049 2020-10-29 13:05:40 +08:00
parent fb2d6f2720
commit fe3b4b3331
1 changed files with 26 additions and 0 deletions
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26
robotgo.go
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@ -1542,3 +1542,29 @@ func ActiveName(name string) error {
return err
}
// ToImage convert C.MMBitmapRef to standard image.Image
func ToImage(bit C.MMBitmapRef) image.Image {
bmp1 := ToBitmap(bit)
img1 := image.NewRGBA(image.Rect(0, 0, bmp1.Width, bmp1.Height))
img1.Pix = make([]uint8, bmp1.Bytewidth*bmp1.Height)
copyToVUint8A(img1.Pix, bmp1.ImgBuf)
img1.Stride = bmp1.Bytewidth
return img1
}
func val(p *uint8, n int) uint8 {
addr := uintptr(unsafe.Pointer(p))
addr += uintptr(n)
p1 := (*uint8)(unsafe.Pointer(addr))
return *p1
}
func copyToVUint8A(dst []uint8, src *uint8) {
for i := 0; i < len(dst)-4; i += 4 {
dst[i] = val(src, i+2)
dst[i+1] = val(src, i+1)
dst[i+2] = val(src, i)
dst[i+3] = val(src, i+3)
}
}