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add ToImage examples code

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This commit is contained in:
vcaesar 2020-10-30 15:25:28 -04:00
parent 9bbfcc1a55
commit 5528eee031
3 changed files with 31 additions and 26 deletions
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1
.gitignore vendored
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@ -78,3 +78,4 @@ vendor
# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
.glide/
examples/bitmap/test_IMG.png

3
examples/bitmap/main.go
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@ -21,6 +21,9 @@ import (
func toBitmap(bmp robotgo.CBitmap) {
bitmap := robotgo.ToMMBitmapRef(bmp)
img := robotgo.ToImage(bitmap)
fmt.Println("img: ", img)
imgo.SaveToPNG("test_IMG.png", img)
gbit := robotgo.ToBitmap(bitmap)
fmt.Println("go bitmap", gbit, gbit.Width)

53
robotgo.go
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@ -1107,6 +1107,33 @@ func DecodeImg(path string) (image.Image, string, error) {
return imgo.DecodeFile(path)
}
// 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)
}
}
// OpenImg open the image return []byte
func OpenImg(path string) []byte {
return imgo.ImgToBytes(path)
@ -1542,29 +1569,3 @@ 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)
}
}