rename WriteTo API to WriteImage

captcha.go

@@ -65,7 +65,7 @@ type SetOption func(*Options)
 
 // Data is the result of captcha generation.
 // It has a `Text` field and a private `img` field that will
-// be used in `WriteTo` receiver
+// be used in `WriteImage` receiver
 type Data struct {
 	// Text is captcha solution
 	Text string
@@ -73,9 +73,9 @@ type Data struct {
 	img *image.NRGBA
 }
 
-// WriteTo encodes image data and writes to an io.Writer.
+// WriteImage encodes image data and writes to an io.Writer.
 // It returns possible error from PNG encoding
-func (data *Data) WriteTo(w io.Writer) error {
+func (data *Data) WriteImage(w io.Writer) error {
 	return png.Encode(w, data.img)
 }
 

captcha_test.go

@@ -14,7 +14,7 @@ func TestNewCaptcha(t *testing.T) {
 		t.Fatal(err)
 	}
 	buf := new(bytes.Buffer)
-	data.WriteTo(buf)
+	data.WriteImage(buf)
 }
 
 func TestSmallCaptcha(t *testing.T) {

example/basic/main.go

@@ -34,7 +34,7 @@ func captchaHandle(w http.ResponseWriter, _ *http.Request) {
 		fmt.Println(err.Error())
 		return
 	}
-	img.WriteTo(w)
+	img.WriteImage(w)
 }
 
 func mathHandle(w http.ResponseWriter, _ *http.Request) {
@@ -44,5 +44,5 @@ func mathHandle(w http.ResponseWriter, _ *http.Request) {
 		fmt.Println(err.Error())
 		return
 	}
-	img.WriteTo(w)
+	img.WriteImage(w)
 }

example/load-font/main.go

@@ -41,5 +41,5 @@ func captchaHandle(w http.ResponseWriter, _ *http.Request) {
 		fmt.Println(err.Error())
 		return
 	}
-	img.WriteTo(w)
+	img.WriteImage(w)
 }

history.md

@@ -1,3 +1,7 @@
+0.12.0 / 2017-10-07
+===================
+* Add FontDPI and FontScale options
+
 0.11.0 / 2017-09-28
 ===================
 * Add NewMathExpr API