Merge pull request #336 from go-vgo/bitmap-pr

add more image convert function

robotgo.go

@@ -62,6 +62,8 @@ import (
 	"unsafe"
 
 	// "syscall"
+	"encoding/base64"
+	"image/jpeg"
 	"os/exec"
 
 	"github.com/go-vgo/robotgo/clipboard"
@@ -940,6 +942,63 @@ func TocharBitmap(bit C.MMBitmapRef) *C.char {
 	return strBit
 }
 
+// ToByteImg convert image.Image to []byte
+func ToByteImg(img image.Image) []byte {
+	buff := bytes.NewBuffer(nil)
+	jpeg.Encode(buff, img, nil)
+
+	var dist []byte
+	base64.StdEncoding.Encode(dist, buff.Bytes())
+
+	return dist
+}
+
+// ToStringImg convert image.Image to string
+func ToStringImg(img image.Image) string {
+	return string(ToByteImg(img))
+}
+
+// StrToImg convert base64 string to image.Image
+func StrToImg(data string) (image.Image, error) {
+	reader := base64.NewDecoder(base64.StdEncoding, strings.NewReader(data))
+	m, _, err := image.Decode(reader)
+
+	return m, err
+}
+
+// ByteToImg convert []byte to image.Image
+func ByteToImg(b []byte) (image.Image, error) {
+	img, _, err := image.Decode(bytes.NewReader(b))
+	return img, 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)
+	}
+}
+
 func internalFindBitmap(bit, sbit C.MMBitmapRef, tolerance float64) (int, int) {
 	pos := C.find_bitmap(bit, sbit, C.float(tolerance))
 	// fmt.Println("pos----", pos)
@@ -1127,39 +1186,6 @@ func DecodeImg(path string) (image.Image, string, error) {
 	return imgo.DecodeFile(path)
 }
 
-// ByteToImg convert []byte to image.Image
-func ByteToImg(b []byte) (image.Image, error) {
-	img, _, err := image.Decode(bytes.NewReader(b))
-	return img, 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)
-	}
-}
-
 // OpenImg open the image return []byte
 func OpenImg(path string) ([]byte, error) {
 	return imgo.ImgToBytes(path)